Ballycastle Sea Temperature
(Today) 2024
The water will feel cool (fresh). Probably too cold for all but seasoned swimmers. We'd recommend a 4mm or 5mm wetsuit if you want to stay in the water.
Current weather
(few clouds)
The measurements for the water temperature in Ballycastle, N Ireland are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.
*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.
Water temp by month
Monthly average max / min water temperatures
The graph below shows the range of monthly Ballycastle water temperature derived from many years of historical sea surface temperature data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 7.9 | 7.6 | 7.3 | 7.8 | 9.2 | 9.5 | 11.9 | 13 | 13.1 | 12.2 | 11.1 | 9.4 |
| Max °C | 10.1 | 9.1 | 9.2 | 9.9 | 11.1 | 13.8 | 14.8 | 15.5 | 14.9 | 14.2 | 13.3 | 11.7 |
| Min °F | 47.1 | 46.2 | 45.9 | 46.8 | 49.3 | 50.8 | 54.5 | 56.4 | 56.3 | 54.8 | 52.9 | 49.8 |
| Max °F | 49.3 | 47.7 | 47.8 | 48.9 | 51.2 | 55.1 | 57.4 | 58.9 | 58.1 | 56.8 | 55.1 | 52.1 |
The warmest water temperature is in August with an average around 57.6°F / 14.2°C. The coldest month is March with an average water temperature of 46.8°F / 8.2°C.
