Castlerock Beach Sea Water Temperature
A cool beach on the Inner Seas off the West Coast of Scotland, warmest around September at about 14.4°C. Today's reading, 7-day forecast, and monthly averages below.
Castlerock Beach water temperature
Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges.
7-Day Water Temperature Forecast
Castlerock Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Castlerock Beach occurs inJuly, August, September, October — peaking at14.4°C (57.9°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 | 8.2°C | 9.1°C | 10.8°C | Very Cold (< 16°C) |
| February | 7.5°C | 8.3°C | 9.2°C | Very Cold (< 16°C) |
| March | 6.8°C | 8.1°C | 9.2°C | Very Cold (< 16°C) |
| April | 7.3°C | 8.6°C | 9.7°C | Very Cold (< 16°C) |
| May | 8°C | 9.7°C | 11.1°C | Very Cold (< 16°C) |
| June | 10.2°C | 11.5°C | 13°C | Very Cold (< 16°C) |
| July | 12°C | 13°C | 15°C | Very Cold (< 16°C) |
| August | 13.5°C | 14.2°C | 15°C | Very Cold (< 16°C) |
| SeptemberCurrent | 13.4°C | 14.4°C | 15.3°C | Very Cold (< 16°C) |
| October | 12.7°C | 13.6°C | 15°C | Very Cold (< 16°C) |
| November | 9.5°C | 11.9°C | 13.5°C | Very Cold (< 16°C) |
| December | 9.5°C | 10.4°C | 12°C | Very Cold (< 16°C) |
Swimming FAQs for Castlerock Beach
Is the sea warm enough to swim in Castlerock Beach today?
Typical sea surface temperature in Castlerock Beach this time of year is 14.4°C (57.9°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 Castlerock Beach?
The highest water temperatures in Castlerock Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Castlerock Beach in September?
Historically in September, water temperatures in Castlerock Beach average around14.4°C (57.9°F), fluctuating between a recorded minimum of 13.4°C and a maximum of 15.3°C.