Portelet Sea Water Temperature
A temperate beach on the Celtic Sea, warmest around September at about 17.2°C. Today's reading, 7-day forecast, and monthly averages below.
Portelet water temperature
Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing.
7-Day Water Temperature Forecast
Portelet Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Portelet occurs inJuly, August, September, October — peaking at17.2°C (63°F) in September.
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 | 9.1°C | 10.6°C | 12.3°C | Very Cold (< 16°C) |
| February | 8°C | 9.7°C | 11°C | Very Cold (< 16°C) |
| March | 8.2°C | 9.4°C | 10.4°C | Very Cold (< 16°C) |
| April | 9°C | 10°C | 11.7°C | Very Cold (< 16°C) |
| May | 10.1°C | 11.7°C | 13.7°C | Very Cold (< 16°C) |
| June | 12.3°C | 13.8°C | 15.8°C | Very Cold (< 16°C) |
| July | 14.1°C | 15.7°C | 18.1°C | Very Cold (< 16°C) |
| August | 16.1°C | 17°C | 18.7°C | Cool / Refreshing (16°C – 20°C) |
| SeptemberCurrent | 16.4°C | 17.2°C | 18.2°C | Cool / Refreshing (16°C – 20°C) |
| October | 14.8°C | 16.3°C | 17.7°C | Cool / Refreshing (16°C – 20°C) |
| November | 11.7°C | 14.3°C | 16°C | Very Cold (< 16°C) |
| December | 10.7°C | 12.2°C | 13.9°C | Very Cold (< 16°C) |
Swimming FAQs for Portelet
Is the sea warm enough to swim in Portelet today?
Typical sea surface temperature in Portelet 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 Portelet?
The highest water temperatures in Portelet typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Portelet in September?
Historically in September, water temperatures in Portelet average around17.2°C (63.0°F), fluctuating between a recorded minimum of 16.4°C and a maximum of 18.2°C.