Castle Haven Bay Sea Water Temperature
A cool beach on the Irish Sea, warmest around August at about 16°C. Today's reading, 7-day forecast, and monthly averages below.
Castle Haven Bay water temperature
Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges.
7-Day Water Temperature Forecast
Castle Haven Bay Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Castle Haven Bay occurs inJuly, August, September, October — peaking at16°C (60.8°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 | 6°C | 7.8°C | 9.8°C | Very Cold (< 16°C) |
| February | 5.7°C | 6.9°C | 8.2°C | Very Cold (< 16°C) |
| March | 5.8°C | 7°C | 8.5°C | Very Cold (< 16°C) |
| April | 7.2°C | 8.4°C | 9.9°C | Very Cold (< 16°C) |
| May | 9.2°C | 10.7°C | 12.7°C | Very Cold (< 16°C) |
| June | 11°C | 13.1°C | 15.5°C | Very Cold (< 16°C) |
| July | 12.9°C | 14.9°C | 16.4°C | Very Cold (< 16°C) |
| August | 14.7°C | 16°C | 17.2°C | Cool / Refreshing (16°C – 20°C) |
| SeptemberCurrent | 13.9°C | 15.6°C | 17.1°C | Very Cold (< 16°C) |
| October | 12.4°C | 14°C | 15.9°C | Very Cold (< 16°C) |
| November | 9.4°C | 11.4°C | 13.6°C | Very Cold (< 16°C) |
| December | 8°C | 9.3°C | 11.2°C | Very Cold (< 16°C) |
Swimming FAQs for Castle Haven Bay
Is the sea warm enough to swim in Castle Haven Bay today?
Typical sea surface temperature in Castle Haven Bay this time of year is 15.6°C (60.1°F) — classified as Very Cold (< 16°C). Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges. Live readings load automatically.
What are the warmest months for swimming in Castle Haven Bay?
The highest water temperatures in Castle Haven Bay typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Castle Haven Bay in September?
Historically in September, water temperatures in Castle Haven Bay average around15.6°C (60.1°F), fluctuating between a recorded minimum of 13.9°C and a maximum of 17.1°C.