Sark, Guernsey
Celtic Sea49.50°N, 2.53°WStation GU-SAR-LAN

L'Ancresse Beach Sea Water Temperature

A temperate beach on the Celtic Sea, warmest around September at about 16.8°C. Today's reading, 7-day forecast, and monthly averages below.

Live readings · auto-updating
Water Temperature NowBuoy & Sentinel-3 SST

L'Ancresse Beach water temperature

16.8
62.2°FCool / Refreshing (16°C – 20°C)

Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing.

+0°vs Sep avgCeltic Sea49.50°N, 2.53°W
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
18°C
64.9°F onshore
Wind Speed
12 km/h
Surface wind
Wave Height
0.8 m
Slight shore chop
Swell
0.6 m
Deep water swell
Wave Period
6 s
Peak interval
UV Index
—
Daily maximum
Sunrise
—
First morning light
Sunset
—
Golden hour close

7-Day Water Temperature Forecast

Open-Meteo ocean model
Today
WedSep 30
16.8°C
62.2°F
Waves: 1m
Refreshing
ThuOct 1
17.1°C
62.8°F
Waves: 0.9m
Refreshing
FriOct 2
17.2°C
63°F
Waves: 0.7m
Refreshing
SatOct 3
17.1°C
62.8°F
Waves: 0.6m
Refreshing
SunOct 4
16.8°C
62.2°F
Waves: 0.7m
Refreshing
MonOct 5
16.5°C
61.7°F
Waves: 0.9m
Refreshing
TueOct 6
16.4°C
61.5°F
Waves: 1m
Refreshing
Forecast cooling trend: -0.4°C over 7 days at L'Ancresse Beach.
Confidence: High

L'Ancresse Beach Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in L'Ancresse Beach occurs inJuly, August, September, October — peaking at16.8°C (62.2°F) in September.

Year-Round Water Temperature Curve (°C / °F)

Hover a bar for details
Current month Comfortable (20–24°C) Warm (24°C+) Cool (<20°C)
11
Jan
10
Feb
10
Mar
10
Apr
12
May
14
Jun
15
Jul
17
Aug
Current
17
Sep
16
Oct
14
Nov
12
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January9.5°C10.8°C12.4°CVery Cold (< 16°C)
February8.4°C10°C11.3°CVery Cold (< 16°C)
March8.4°C9.6°C10.7°CVery Cold (< 16°C)
April9.1°C10.1°C11.4°CVery Cold (< 16°C)
May10°C11.5°C13.5°CVery Cold (< 16°C)
June11.9°C13.5°C15°CVery Cold (< 16°C)
July13.7°C15.3°C17.8°CVery Cold (< 16°C)
August15.7°C16.6°C18.4°CCool / Refreshing (16°C – 20°C)
SeptemberCurrent16.1°C16.8°C17.7°CCool / Refreshing (16°C – 20°C)
October14.6°C16.1°C17.3°CCool / Refreshing (16°C – 20°C)
November11.7°C14.2°C16.1°CVery Cold (< 16°C)
December11°C12.3°C13.9°CVery Cold (< 16°C)

Swimming FAQs for L'Ancresse Beach

Is the sea warm enough to swim in L'Ancresse Beach today?

Typical sea surface temperature in L'Ancresse Beach this time of year is 16.8°C (62.2°F) — classified as Cool / Refreshing (16°C – 20°C). Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing. Live readings load automatically.

What are the warmest months for swimming in L'Ancresse Beach?

The highest water temperatures in L'Ancresse Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.

What is the typical water temperature in L'Ancresse Beach in September?

Historically in September, water temperatures in L'Ancresse Beach average around16.8°C (62.2°F), fluctuating between a recorded minimum of 16.1°C and a maximum of 17.7°C.

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L'Ancresse Beach Coastal Zone Map

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