Killiney Beach Sea Water Temperature
A cool beach on the Irish Sea, warmest around August at about 15.2°C. Today's reading, 7-day forecast, and monthly averages below.
Killiney Beach water temperature
Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges.
7-Day Water Temperature Forecast
Killiney Beach Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Killiney Beach occurs inJuly, August, September, October — peaking at15.2°C (59.4°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 | 9.4°C | 10.9°C | Very Cold (< 16°C) |
| February | 6.2°C | 8.1°C | 9.6°C | Very Cold (< 16°C) |
| March | 6.4°C | 8°C | 9.4°C | Very Cold (< 16°C) |
| April | 7.8°C | 9°C | 10.2°C | Very Cold (< 16°C) |
| May | 9.1°C | 10.9°C | 12.9°C | Very Cold (< 16°C) |
| June | 10.9°C | 13.3°C | 14.7°C | Very Cold (< 16°C) |
| July | 12.9°C | 14.9°C | 18.4°C | Very Cold (< 16°C) |
| August | 13.9°C | 15.2°C | 16.9°C | Very Cold (< 16°C) |
| SeptemberCurrent | 13.3°C | 14.7°C | 16.4°C | Very Cold (< 16°C) |
| October | 12.8°C | 13.7°C | 15.3°C | Very Cold (< 16°C) |
| November | 10.9°C | 12.2°C | 13.7°C | Very Cold (< 16°C) |
| December | 9.2°C | 10.6°C | 12.1°C | Very Cold (< 16°C) |
Swimming FAQs for Killiney Beach
Is the sea warm enough to swim in Killiney Beach today?
Typical sea surface temperature in Killiney Beach this time of year is 14.7°C (58.5°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 Killiney Beach?
The highest water temperatures in Killiney Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Killiney Beach in September?
Historically in September, water temperatures in Killiney Beach average around14.7°C (58.5°F), fluctuating between a recorded minimum of 13.3°C and a maximum of 16.4°C.