Sea temperature and swimming season in Jersey
When the sea is warm enough to swim in 1 coastal city in Jersey.
| City | Warmest | Coldest | Swimming season |
|---|---|---|---|
| Saint Helier | 18.5°C Aug | 9.4°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