Finistère, France
Celtic Sea47.85°N, 3.89°WStation FR-FIN-PLA

Plage de Ster-Greich Sea Water Temperature

A temperate beach on the Celtic Sea, warmest around August at about 17.8°C. Today's reading, 7-day forecast, and monthly averages below.

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Water Temperature NowBuoy & Sentinel-3 SST

Plage de Ster-Greich water temperature

17.2
63°FCool / Refreshing (16°C – 20°C)

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

+0°vs Sep avgCeltic Sea47.85°N, 3.89°W
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
19°C
65.7°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
17.2°C
63°F
Waves: 1m
Refreshing
ThuOct 1
17.5°C
63.5°F
Waves: 0.9m
Refreshing
FriOct 2
17.6°C
63.7°F
Waves: 0.7m
Refreshing
SatOct 3
17.5°C
63.5°F
Waves: 0.6m
Refreshing
SunOct 4
17.2°C
63°F
Waves: 0.7m
Refreshing
MonOct 5
16.9°C
62.4°F
Waves: 0.9m
Refreshing
TueOct 6
16.8°C
62.2°F
Waves: 1m
Refreshing
Forecast cooling trend: -0.4°C over 7 days at Plage de Ster-Greich.
Confidence: High

Plage de Ster-Greich Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Plage de Ster-Greich occurs inJune, July, August, September — peaking at17.8°C (64°F) in August.

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
12
Apr
14
May
16
Jun
18
Jul
18
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
January9.3°C10.8°C12.7°CVery Cold (< 16°C)
February8.1°C10°C11.7°CVery Cold (< 16°C)
March8.4°C10.1°C11.6°CVery Cold (< 16°C)
April9.4°C11.5°C14.2°CVery Cold (< 16°C)
May11.9°C13.9°C18°CVery Cold (< 16°C)
June13.8°C16.1°C18.1°CCool / Refreshing (16°C – 20°C)
July14.2°C17.5°C21°CCool / Refreshing (16°C – 20°C)
August14.9°C17.8°C20.7°CCool / Refreshing (16°C – 20°C)
SeptemberCurrent14.5°C17.2°C18.5°CCool / Refreshing (16°C – 20°C)
October13.9°C16°C18.4°CCool / Refreshing (16°C – 20°C)
November12.3°C14.1°C16°CVery Cold (< 16°C)
December11°C12.3°C14.1°CVery Cold (< 16°C)

Swimming FAQs for Plage de Ster-Greich

Is the sea warm enough to swim in Plage de Ster-Greich today?

Typical sea surface temperature in Plage de Ster-Greich this time of year is 17.2°C (63°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 Plage de Ster-Greich?

The highest water temperatures in Plage de Ster-Greich typically occur duringJune, July, August, September, when monthly averages reach peak seasonal levels.

What is the typical water temperature in Plage de Ster-Greich in September?

Historically in September, water temperatures in Plage de Ster-Greich average around17.2°C (63.0°F), fluctuating between a recorded minimum of 14.5°C and a maximum of 18.5°C.

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Plage de Ster-Greich Coastal Zone Map

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