Tropical Low 01 On 15 July, a low-pressure area that had developed out of an equatorial trough which interacted with the
Madden-Julian Oscillation gained better characteristics, thus it was noted as the first tropical low, in the area of responsibility of TCWC Jakarta. It was the first July tropical low in the Australian region since
2022. As the system slowly intensified in an area of warm SSTs offset by high
wind shear, a
TCFA was issued by the
JTWC, shortly before the system exited into the
South-West Indian Ocean basin on 16 July, where it was designated Tropical Depression 01 by MFR.
Severe Tropical Cyclone Fina On 15 November, the Bureau of Meteorology started tracking a low-pressure system near the
Timor Sea and designated it as
02U. On 18 November, the system developed stronger convection and thunderstorm activity. It intensified into Tropical Cyclone
Fina on the same day and remained a compact system. On 19 November, Fina intensified into a Category 2 cyclone amid warm
sea surface temperatures. On 1:09 am ACST on Friday 21 November 2025, the Northern Territory Emergency Service issued cyclone warnings for part of the Northern Territory. The
Darwin Airport closed at 9 AM ACST in preparation for the cyclone, and shelves were empty in some stores across Darwin as major supermarkets were advised to close across the region. The local hospital,
Royal Darwin Hospital, issued a code brown to streamline emergency management systems. The strongest wind gusts were recorded were around 109 km/h at Crocker Island Airport on 21 November, and 107 km/h in 22 November. The most notable 24-hour rainfall recorded from Fina was at
Middle Point, near Darwin, which would record 430 millilitres in the 24 hours to the morning of 23 November. Across 22 and 23 November, the system caused several significant power outages, including large parts of Darwin,
Palmerston, and the
Tiwi Islands, affecting at least 19,500 customers. Roads were flooded, and properties were damaged. Hundreds of trees fell across Darwin, damaging cars and homes, while parts of the
Royal Darwin Hospital's external wall collapsed. Tiwi college sustained an estimated AU$600,000-700,000 (US$424,000-494,000) worth of damage from Fina.
Severe Tropical Cyclone Bakung On 10 December, a low pressure area formed to the south of the city of
Jakarta. Although the system was outside its area of responsibility at the time, the
Bureau of Meteorology designated it Tropical Low 05U. 05U then began moving southwest, and began to consolidate and wrap deep convection near its centre, and was named Bakung by
TCWC Jakarta on 12 December. The cyclone developed rapidly in an environment of low
wind shear, reaching its peak intensity as a category 4 on 14 December, and had moved into the Australian area of responsibility. High wind shear led to a weakening of the system during 15–16 December, before easing and allowing Bakung to intensify to a category 3 early 17 December. The wind shear then rapidly increased, weakening the system to a tropical low before dissipating on 18 December.
Tropical Cyclone Grant On 16 December, a
tropical disturbance, designated as
Tropical Low 03U by the Bureau of Meteorology (BoM), formed south of
Indonesia and began to move west. On 22 December, the JTWC advised that the system began to slow its forward motion speed due to a switch in a steering flow among a split subtropical ridge. The following day, the BoM upgraded the system to a category 1 tropical cyclone on the Australian scale and was assigned the name
Grant, with the JTWC noting that convection within the system was improving due to a decrease in wind shear. However, later that day, the JTWC noted an increase in northerly wind shear and a decrease in convection and the BoM downgraded Grant to a tropical low early the next day. Grant continued to strengthen, with the BoM upgrading the cyclone to category 2 intensity the next day before entering
La Reunion's area of responsibility on 27 December. Grant brought heavy rainfall and gale-force winds while passing close to the
Cocos (Keeling) Islands. However, minimal damage was reported. Later that same day, the BoM to upgraded it to a category 1 tropical cyclone on the Australian scale and assigned it the name
Hayley. Shortly after, it began a period of
rapid intensification, with the JTWC observing convection developing in the southwestern quadrant of the storm, along with an eye-like feature beginning to appear on satellite imagery. The BoM then upgraded Hayley to category 4 strength late on 29 December. Early the next day, Hayley weakened slightly to category 3 strength and turned east-southeast toward the
Dampier Peninsula. The following day, Hayley made landfall near the communities of
Lombadina and
Djarindjin. After crossing King Sound, Hayley moved inland over Western Australia once again and began to weaken, with the JTWC observing that land interaction was beginning to impinge on the centre of circulation within the cyclone. Hayley then weakened below tropical cyclone strength late on 30 December and dissipated early the next day. Wind gusts up to were reported in the Lombadina community. North of Broome, strong winds tore off the roofs of two homes. A basketball court sustained severe damage from the storm. Water leaked through the roofs of several homes. A tree fell on a parked car in
One Arm Point. Another fallen tree damaged the roof of a church in Djarindjin. Several communities were left without power and nine people fled to shelters. A bridge was temporarily closed after a tree fell on it. After the storm, seventeen State Emergency Service volunteers were mobilized to assist with recovery efforts.
Tropical Cyclone Iggy On 30 December 2025, a tropical low began to develop southwest of
Sumatra, assisted by increasing westerly winds. The Bureau of Meteorology (BoM) designated the system as
Tropical Low 10U. The low quickly began to move southeast and passed
Christmas Island to the east on 31 December.
Convection within the storm began to improve in its northern side as a result of it moving into a more favorable environment with warmer sea surface temperatures and lower vertical wind shear. Early the next day, the BoM determined that the low intensified into a category 1 tropical cyclone on the Australian scale and assigned the name Iggy.'' Iggy then weakened 18 hours later to a tropical low, with gales in the system confining to the eastern side. On 2 January, Iggy turned west and all gales within the system collapsed. Iggy then dissipated over the Indian Ocean shortly after. While closely passing to the east of Christmas Island, the storm brought of rain to the territory. The JTWC noted that the cyclone was gradually beginning to organize with deep convection developing in the northern and western portions of the storm with its cloud tops beginning to cool. Early the next day, the BoM upgraded the low to a category 1 tropical cyclone on the Australian scale and assigned the name
Jenna while the cyclone passed east of the Cocos (Keeling) Islands
. Jenna then turned south-southwest, beginning to strengthen as a result of moving into a more favourable environment for intensification. Westerly wind shear caused all convection within the system to displace southeast of its centre and the BoM downgraded the cyclone to a tropical low early the next day. Jenna brought of rain and wind gusts up to to the Cocos (Keeling) Islands.
Tropical Cyclone Koji On 7 January, a broad
monsoon depression formed in the
Coral Sea, and was designated Tropical Low 12U. Early on 10 January, gales began to wrap around the low, and the Bureau of Meteorology (BoM) upgraded the low to a category 2 tropical cyclone the Australian scale and assigned the name
Koji. However, the extent of gales within the system began to decrease and Koji weakened to a tropical low late the same day, shortly before moving ashore on the Queensland coast between
Ayr and
Bowen. The system persisted as a tropical low inland over Queensland until it ultimately dissipated on 14 January. Strong winds caused fences, trees and power lines to fall while heavy rainfall flooded roadways and bridges, triggered several landslides, and caused rivers to overflow their banks. Approximately 23,000 customers were left without power. Several locations recorded very high 48 hour rainfall totals, including Mackay, which received over . Towns that sustained major damage included
Clermont, which saw up to 71 homes affected, and
Eungella, which received severe damage to roads and was unable to receive food or medical supplies. Twenty five boats were destroyed by the cyclone, leaving several people homeless.
Aon estimated that losses from Koji totaled to US$50 million.
Tropical Cyclone Luana On 21 January, the Bureau of Meteorology (BoM) began to issue advisories on a tropical low that formed in the Eastern
Indian Ocean south of
Indonesia. The low began to intensify while moving southeast toward the Kimberley coast. Later that day, the BoM noted that gales were developing in the northern quadrant of the system and upgraded the low to a category 1 tropical cyclone on the Australian scale, and assigned the name
Luana. Subsequently, the BoM upgraded Luana to category 2 tropical cyclone as it made landfall between Beagle Bay and Cape Leveque. Luana then weakened to a tropical low the next day as it continued to move inland. However, the system was able to maintain its tropical characteristics due to a possible brown ocean effect. Luana then dissipated on 29 January. A weather station at Lombardina recorded a gust of . The storm caused significant structural damage to the Mercedes Cove Exclusive Coastal Retreat, where buildings were unroofed and debris was scattered. In Derby, approximately 70 customers lost power, and State Emergency Service (SES) volunteers, assisted by minimum-security prisoners from the West Kimberley Regional Prison, responded to numerous calls for fallen trees blocking homes and roads. There were twelve reports of trees that fell on homes. Rainfall was exceptionally heavy across the region. Derby recorded of rain in a 24-hour period, while Lombardina reported a three-day total of . These rains led to the closure of several major transport routes, including the Gibb River Road and Cape Leveque Road. As the remnants of Luana tracked southwards towards the Goldfields and Eucla districts, flood watches were maintained for the Salt Lake and Nullarbor river catchments. Later that day, the BoM noted that the low was intensifying and upgraded it to a category 1 tropical cyclone on the Australian scale and assigned the name
Mitchell. Mitchell then began to move west-southwest, paralleling the Pilbara coastline while continuing to intensify. The following day, the BoM upgraded Mitchell to a category 3 tropical cyclone. Early the next day, the JTWC observed that Mitchell began to weaken, with wind shear and drier air impinging upon the centre of circulation. The BoM then downgraded Mitchell to a category 2 tropical cyclone while it began to skirt the
North West Cape and turning south. The following day, the BoM downgraded Mitchell to a category 1 tropical cyclone while it continued its southward trajectory, skirting the upper west coast. Mitchell then made landfall south of Carnarvon, with the BoM downgrading it to a tropical low later that day. The low then dissipated the next day. Prior to being upgraded to a category 1 tropical cyclone, Mitchell dropped heavy rainfall across the
Northern Territory, causing to
Daly River to swell to and forcing the evacuation of 250 residents.
Shark Bay recorded up to of rain and Legendre Island recorded a maximum wind gust of . Banana farmers lost around half of their crops. A farmer
Carnarvon estimated fourteen grape vines were damaged and that he lost AU$40,000 (US$28,000) from the cyclone. Remnant moisture from Mitchell fueled severe thunderstorms in the
Wheatbelt and Goldfields regions. Strong winds ripped doors off of buildings and caused a few silos to collapse. In Exmouth, nearly 2,000 properties were left without power. Emergency services reported around twenty calls involving property damage and requests for assistance. Additionally, the closure of ports from the cyclone temporarily disrupted iron ore exports.
Tropical Low 28U On 1 March, tropical low 28U formed in the southeastern
Indian Ocean, around 450km west southwest of
Christmas Island. The system passed to the south of Christmas Island on 2 March, tracking east southeast, then strengthening south of
Indonesia. The JTWC designated the tropical low as
Tropical Cyclone 25S on 4 March, albeit only marginal and brief strengthening occurred. Thereafter, the tropical low began interacting with 30U, accelerating it to the east, before weakening and dissipating west of
Broome on 7 March.
Tropical Low 29U The Bureau of Meteorology began monitoring Tropical Low 29U on 1 March. On 4 March, the tropical low began showing signs of organization and was designated as
Tropical Cyclone 24P by the Joint Typhoon Warning Center (JTWC). It then strengthened briefly, but this development was short-lived. Wind shear and other environmental factors inhibited continued growth of the system, and the system dissipated on 6 March. On 8 March the system exited land and redeveloped into a subtropical storm as it raced eastward.
Tropical Low 30U Tropical Low 30U developed off the
Kimberly coast, travelling west, guided by a mid-level
high pressure ridge south of the low. Gales developed within the western half of the storm on 6 March, and the Joint Typhoon Warning Center designated the system
Tropical Cyclone 26S. It interacted with the neighboring 28U during 5-6 March, accelerating the system northwestwards, until 28U weakened, allowing 30U to continue tracking west. The system began to weaken on 8 March, losing its gale-force winds, and it ultimately dissipated on 12 March, without directly impacting any communities.
Severe Tropical Cyclone Narelle Late on 9 March, the BoM began to forecast a tropical low forming in the eastern Coral Sea in the following 7 days, and pre-designated it as 34U. This came to fruition five days later, when the bureau reported that it had developed to the south of the Solomon Islands. The JTWC began monitoring the low the same day, as it was in a favorable environment of warm sea surface temperatures, good poleward outflow aloft and moderate wind shear. By 16 March, the JTWC issued a TCFA on 34U, as its centre continued organizing with persisting convection over it. It later began issuing warnings on the system the next day, designating it
27P, before the BoM reported that it had strengthened into a Category 1 tropical cyclone on the Australian scale, naming it
Narelle. The same day, it quickly intensified into a Category 2, with the BoM anticipating further intensification. By 18 March, the cyclone was upgraded to a Category 3 severe tropical cyclone, with the Bureau forecasting a peak at Category 5 strength. On 19 March, the cyclone was upgraded to Category 5 severe tropical cyclone strength by the Bureau of Meteorology, after wind speeds of were observed. The following day, it made landfall on far north Queensland as a high-end Category 4-equivalent tropical cyclone on the Australian scale. Narelle then made a second landfall just to the north-northeast of Point Arrowsmith on the western side of the Gulf of Carpentaria late the next day, as a Category 3 cyclone on the Australian scale. Narelle would weaken to a tropical low for the next few days while it traversed across northwestern Australia, emerging off the Indian Ocean coast on 24 March. Almost immediately, Narelle began to restrengthen. By 26 March, it once again became a Category 4 cyclone on the Australian scale as it neared the North West Cape, weakening to Category 3 status upon passing the peninsula. On 27 March, Narelle made landfall south of Coral Bay at that intensity, or Category 2 on the Saffir-Simpson scale. Over Western Australia, the storm created a haze of red sky as it lifted iron rich dust into the air. Shortly thereafter, it weakened to a tropical low as it moved further inland, and begun its transition into an extratropical cyclone. Rainfall up to was reported across portions of the
Cape York Peninsula while wind gusts up to were recorded in
Lockhart River.
Ergon Energy estimated that 3,000 properties lost power due to strong winds from Narelle. In
Aurukun, a barbecue shelter was damaged by a fallen tree.
Telstra reported that four
cell sites had been knocked offline by Narelle. Premier of Queensland David Crisafulli reported that several roads were damaged by the cyclone. Following the cyclone, 50
lineworkers were mobilized to restore power and sixteen rural communities were surveyed for damage. Around 500 people were displaced as a result of the flooding.
Aon estimated that losses from Narelle totaled to US$500 million. On 4 April, the system crossed 155°E into the area of responsibility of TCWC Port Moresby and was given the name
Maila. Maila was the first tropical cyclone to be named by TCWC Port Moresby since
Cyclone Guba in 2007. Rapid strengthening and gradual northwestward movement occurred throughout the remainder of the day. By 5 April, Maila reached Category 3 status on the Australian scale, or Category 1 on the Saffir-Simpson scale. Cyclone Maila brought strong winds and heavy rain to the Solomon Islands'
Western Province, with the Australian
Bureau of Meteorology reporting winds of 130 km per hour near the centre with wind gusts to 185 km per hour. The next morning, Maila was upgraded to a Category 5 cyclone on the Australian scale and Category 4 on the Saffir-Simpson scale, with winds of 215 kilometres per hour near the centre and wind gusts to 295 kilometres per hour being reported. In preparation for the approach of Maila, TCWC Port Moresby issued a tropical cyclone advisory at 15:00 local time on 3 April followed by a tropical cyclone warning at midnight on 5 April through social media.
Other systems • Tropical Low 07U formed over the
Arafura Sea on 15 December. It continued to move erratically until 29 December, when it promptly degenerated just over the
Northern Territory. The system produced rainfall exceeding 100 mm in the
Gulf of Carpentaria, including 148mm at Centre Island. 07U caused a man to drown in his vehicle due to flooding at Normanton on 30 December and caused stock losses of over 100,000 cattle. • Tropical Low 14U formed near the
Solomon Islands on 12 January. It left the Australian region and moved into the South Pacific on 19 January, being redesignated as
05F by the
Fiji Meteorological Service. • Tropical Low 15U formed near the coast of
Western Australia on 14 January, and was given a low chance of developing into a tropical cyclone. The Bureau of Meteorology ceased tracking the system on 16 January. • On 21 January, the JTWC began monitoring Tropical Cyclone 16P in the far eastern reaches of the basin. Hours later, it moved into the South Pacific, where it was classified as
Tropical Depression 06F. • Tropical Low 17U formed in
Coral Sea on 22 January. However, it dissipated over the open ocean late at night, on the same day. On 27 January, 17U’s remnants regenerated and became
Tropical Depression 07F. • Tropical Low 18U formed in the
Gulf of Carpentaria on 22 January. It quickly made landfall on the
Cape York Peninsula before dissipating on 24 January. However, on 27 January, the Bureau of Meteorology began tracking a possible redevelopment of the system as it was expected to move back into the Gulf of Carpentaria in the following days. 18U strengthened once again as a tropical low on 29 January and stop tracked by BoM on 31 January. Later, its remnant low redeveloped over the
Northern Territory. The system caused rainfalls of 300-500 meters, with
Daly River being evacuated ahead of forecast major flooding. • Tropical Low 23U formed in the
Coral Sea on 11 February, drifting around with little overall change in position. The BoM stopped tracking the system as it degenerated into a residual disturbance on 13 February. • Tropical Low 26U led to heavy falls exceeding 100 mm in
Central Australia, with some areas receiving record–breaking rainfalls, having a significant impact on grape growers. Several weather stations recorded in excess of 500 mm, with one property owner reporting over 600 mm of rain. • Tropical Low 31U formed in the
Gulf of Carpentaria on 1 March. It stalled in the Gulf for a few days until eventually moving over the Northern Territory of Australia on 4 March with winds of around 20 mph and a pressure of about 1000 mbar. The remnants of the system lasted over the Northern Territory for a few hours, bringing heavy rain to Katherine and Daly District and causing flooding problems. Eventually, the system weakened into a monsoon trough on 6 March. Overall, this system remained a low chance for tropical development. • On 13 April, Tropical Low 38U, which the
Bureau of Meteorology had been monitoring for over a week by then, formed roughly 200km to the north of the
Cocos (Keeling) Islands whilst moving due westward. The next day, the
Joint Typhoon Warning Center began tracking the low as
Invest 92S. However, no further significant development occurred, and the system dissipated on 16 April. == Storm names ==