Sea temperature and swimming season in Ireland
When the sea is warm enough to swim in 14 coastal cities in Ireland.
| City | Warmest | Coldest | Swimming season |
|---|---|---|---|
| Dublin | 15.8°C Aug | 8.3°C Feb | never comfortable |
| Waterford | 16.0°C Aug | 9.2°C Feb | never comfortable |
| Drogheda | 15.9°C Aug | 7.6°C Feb | never comfortable |
| Dundalk | 15.9°C Aug | 7.6°C Feb | never comfortable |
| Bray | 15.4°C Aug | 8.7°C Feb | never comfortable |
| Balbriggan | 15.8°C Aug | 8.2°C Feb | never comfortable |
| Sligo | 16.1°C Aug | 8.5°C Feb | never comfortable |
| Carrigaline | 16.5°C Aug | 9.6°C Feb | never comfortable |
| Arklow | 16.0°C Aug | 8.3°C Feb | never comfortable |
| Wicklow | 16.0°C Aug | 8.3°C Feb | never comfortable |
| Midleton | 16.3°C Aug | 9.4°C Feb | never comfortable |
| Gorey | 15.9°C Aug | 8.7°C Feb | never comfortable |
| Youghal | 16.3°C Aug | 9.4°C Feb | never comfortable |
| Dungarvan | 16.0°C Aug | 9.2°C Feb | never comfortable |
Knowing the temperature is only half of it. What to wear, and why cold shock is the real risk →
Season uses 19°C. Why that number, and where the data comes from