Sea temperature and swimming season in The Netherlands
When the sea is warm enough to swim in 12 coastal cities in The Netherlands.
| City | Warmest | Coldest | Swimming season |
|---|---|---|---|
| The Hague | 19.8°C Aug | 6.2°C Feb | Aug – Aug (1 months) |
| Haarlem | 19.6°C Aug | 6.3°C Feb | Aug – Aug (1 months) |
| Leiden | 19.8°C Aug | 6.2°C Feb | Aug – Aug (1 months) |
| Den Helder | 19.2°C Aug | 6.2°C Feb | Aug – Aug (1 months) |
| Middelburg | 19.9°C Aug | 6.5°C Feb | Aug – Aug (1 months) |
| Goes | 19.9°C Aug | 6.5°C Feb | Aug – Aug (1 months) |
| Castricum | 19.4°C Aug | 6.1°C Feb | Aug – Aug (1 months) |
| Delfzijl | 19.9°C Aug | 4.1°C Feb | Aug – Aug (1 months) |
| Hellevoetsluis | 19.6°C Aug | 6.6°C Feb | Aug – Aug (1 months) |
| Schagen | 19.2°C Aug | 6.2°C Feb | Aug – Aug (1 months) |
| Harlingen | 19.7°C Aug | 4.7°C Feb | Jul – Aug (2 months) |
| Hoek van Holland | 19.6°C Aug | 6.5°C Feb | Aug – Aug (1 months) |
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