The temperature of the water in Bali Strait is subject to noticeable seasonal fluctuations, predetermined by the periods of
monsoons. During the period of the northwestern monsoon (January–March), average temperature is about 28–29 °C, whereas in the southeast (July–September) temperature drops to 26 °C. Regardless of the season, the water temperature in the northern part of the strait is 1–1.5 degrees lower than it is in the southern part. The level of
salinity is more stable: about 33 ‰ in the season of the northwestern monsoons and about 34 ‰ in the southeast period. Sea currents in the strait have a very complex configuration, largely dependent on monsoon seasons: during the northwesterly winds, the northern vector predominates, while in the south-east it is the southern one. The maximum speed – up to 13 km / h – flows reach the northern, most narrow part of the strait.
Tidal currents have a
semi-diurnal amplitude. At the beginning of the 21st century, there were noticeable negative trends in the development of the ecological situation in the strait and on its shores, related to human economic activity. Numerous cases of water pollution with industrial wastes,
fertilizers, as well as chemicals used in
gold mining on the Javanese shore are recorded. == See also ==