(which are also the
civil parishes) of the Isles of Scilly; red is St Agnes, blue is Bryher, orange is Tresco, green is St Martin's, and grey is St Mary's. The Isles of Scilly form an archipelago of five inhabited islands (six if
Gugh is counted separately from St Agnes) and numerous other small rocky
islets (around 140 in total) lying off
Land's End. Troy Town Farm (Troytown Farm) on the southern part of the southernmost inhabited isle, St Agnes, is the southernmost settlement of the United Kingdom. The islands' position produces a place of great contrast; the ameliorating effect of the sea, greatly influenced by the
North Atlantic Current, means they rarely have frost or snow, which allows local farmers to grow flowers well ahead of those in mainland Britain. The chief agricultural product is cut flowers, mostly
daffodils. Exposure to
Atlantic winds also means that spectacular winter gales lash the islands from time to time. This is reflected in the landscape, most clearly seen on Tresco where the lush
Abbey Gardens on the sheltered southern end of the island contrast with the low
heather and bare rock sculpted by the wind on the exposed northern end.
Natural England has designated the Isles of Scilly as
National Character Area 158. As part of a 2002 marketing campaign, the plant conservation charity
Plantlife chose sea thrift (
Armeria maritima) as the "
county flower" of the islands. (1) Inhabited until 1855. In 1975 the islands were designated as an
Area of Outstanding Natural Beauty. The designation covers the entire archipelago, including the uninhabited islands and rocks, and is the smallest such area in the UK. The islands of Annet and Samson have large
terneries and the islands are well populated by
seals. The Isles of Scilly are the only British habitat of the
lesser white-toothed shrew (
Crocidura suaveolens), where it is known locally as a "
teak" or "
teke".
Place names The
Cornish language was the main language of the islands until the 1700s, which is reflected in many of the islands' place names: • Bryher - from Cornish
breyer "place of hills" • Bishop Rock - an English translation of the 14th century Cornish name
Men an Epscop "the bishop's stone". • Crebawethan - from Cornish
creeb a wethan "reef with a tree". • Ganilly - from Cornish
guen hily "saltwater downs" • Ganinick - from Cornish
(an) geninack "the place of wild garlic" • Gugh - from Cornish
keow "hedge-banks" • Gweal - recorded as
Gwithiall in the 17th century, from Cornish
gwethiall "place of trees" • Helvear - recorded as
Hayle Veor in the 16th century, from Cornish
heyl veur "great estuary/tidings" • Illiswilgig - from Cornish
ennis welgack "grassy island" • Menawethan - from Cornish
men an wedhen "the tree stone" • Peninnis - from Cornish
penn enys "the end of the island" • Porth Hellick - from Cornish
porth helack "cove of willows" • St Agnes - recorded in the 12th century as
Aganas, from early Celtic
ek enes "off-island". "Saint" was added later. • St Martin's - recorded in the 14th century as
Breghyek "dappled one", before taking the name of its church's patron saint. • St Mary's - known as
Ennor (
an nor "the land") before the island took the name of its church's patron saint. • Trenoweth - from Cornish
tre noweth "new town" • Tresco - from Cornish
tre skaw "farm by elder trees", recorded in the 13th century for a holding and later applied to the whole island.
Tidal influx The tidal range at the Isles of Scilly is high for an open sea location; the maximum for St Mary's is . Additionally, the inter-island waters are mostly shallow, which at
spring tides allows for dry land walking between several of the islands. Many of the northern islands can be reached from Tresco, including Bryher, Samson and St Martin's (requires very low tides). From St Martin's White Island, Little Ganilly and Great Arthur are reachable. Although the sound between St Mary's and Tresco, The Road, is fairly shallow, it never becomes totally dry, but according to some sources it should be possible to wade at extreme low tides. Around St Mary's several minor islands become accessible, including Taylor's Island on the west coast and Tolls Island on the east coast. From Saint Agnes, Gugh becomes accessible at each low tide, via a
tombolo.
Climate The Isles of Scilly have an
oceanic climate (
Köppen:
Cfb). However, according to the Trewartha climate classification, the Isles have a
humid subtropical climate (
Trewartha:
Cflk) due to the mean temperature being or greater for 8 months. The average annual temperature is , the warmest place in the British Isles. Winters are, by far, the warmest in the UK due to the moderating effects of the
North Atlantic Drift of the
Gulf Stream. Despite being on exactly the same latitude as
Winnipeg in Canada, snow and frost are extremely rare. The maximum snowfall was on
12 January 1987. The climate has mild winters and cool summers, moderated by the
Atlantic Ocean, thus summer temperatures are not as warm as on the mainland. However, the Isles are one of the sunniest areas in the southwest with an average of seven hours per day in May. The lowest temperature ever recorded was and the highest was . The isles have never recorded a temperature below freezing in the months from May to November inclusive. Precipitation (the overwhelming majority of which is rain) averages about per year. The wettest months are from October to January, while April and May are the driest months.
Geology All the islands of Scilly are all composed of
granite rock of
Early Permian age, an exposed part of the
Cornubian batholith. The
Irish Sea Glacier terminated just to the north of the Isles of Scilly during the
last ice age.
Ancient monuments and historic buildings Historic sites on the Isles of Scilly include: •
Bant's Carn, a
Bronze Age entrance grave •
Halangy Down Ancient Village •
Porth Hellick Down Burial Chamber •
Innisidgen Lower and Upper Burial Chambers •
The Old Blockhouse • The St Agnes Troy Town (stone labyrinth) •
King Charles's Castle •
Harry's Walls, an unfinished artillery fort •
Garrison Tower •
Cromwell's Castle == Flora ==