Plage de l'Islet Sea Water Temperature
A temperate beach on the Celtic Sea, warmest around August at about 18.2°C. Today's reading, 7-day forecast, and monthly averages below.
Plage de l'Islet water temperature
Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing.
7-Day Water Temperature Forecast
Plage de l'Islet Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Plage de l'Islet occurs inJuly, August, September, October — peaking at18.2°C (64.8°F) in August.
Year-Round Water Temperature Curve (°C / °F)
Hover a bar for detailsFull 12-month data table — min / avg / max & swimming comfort
| Month | Min Water Temp | Average Water Temp | Max Water Temp | Swimming Comfort |
|---|---|---|---|---|
| January | 7.8°C | 9.5°C | 11.5°C | Very Cold (< 16°C) |
| February | 7.2°C | 8.7°C | 10°C | Very Cold (< 16°C) |
| March | 7.3°C | 8.8°C | 10.2°C | Very Cold (< 16°C) |
| April | 8.8°C | 10.4°C | 12.4°C | Very Cold (< 16°C) |
| May | 11.1°C | 12.6°C | 14.8°C | Very Cold (< 16°C) |
| June | 13.5°C | 15°C | 17.5°C | Very Cold (< 16°C) |
| July | 15.7°C | 17°C | 18.6°C | Cool / Refreshing (16°C – 20°C) |
| August | 17.1°C | 18.2°C | 20°C | Cool / Refreshing (16°C – 20°C) |
| SeptemberCurrent | 16.7°C | 17.9°C | 19.8°C | Cool / Refreshing (16°C – 20°C) |
| October | 14.6°C | 16.4°C | 18.3°C | Cool / Refreshing (16°C – 20°C) |
| November | 11°C | 13.5°C | 15.8°C | Very Cold (< 16°C) |
| December | 9.5°C | 11.2°C | 13°C | Very Cold (< 16°C) |
Swimming FAQs for Plage de l'Islet
Is the sea warm enough to swim in Plage de l'Islet today?
Typical sea surface temperature in Plage de l'Islet this time of year is 17.9°C (64.2°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 Plage de l'Islet?
The highest water temperatures in Plage de l'Islet typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Plage de l'Islet in September?
Historically in September, water temperatures in Plage de l'Islet average around17.9°C (64.2°F), fluctuating between a recorded minimum of 16.7°C and a maximum of 19.8°C.