What wetsuit do you need in Finland?
The one suit that covers most of the swimming season, for 15 coastal cities in Finland.
| City | Coldest | Warmest | One suit for the season |
|---|---|---|---|
| Helsinki | 0.9°C Feb | 17.8°C Aug | 5/4 mm, and not alone |
| Vantaa | 0.7°C Feb | 17.8°C Aug | 5/4 mm, and not alone |
| Oulu | -0.1°C Feb | 18.7°C Jul | 5/4 mm, and not alone |
| Pori | 0.3°C Feb | 17.7°C Aug | 5/4 mm, and not alone |
| Vaasa | -0.1°C Feb | 17.4°C Jul | 5/4 mm, and not alone |
| Kotka | 0.3°C Feb | 18.6°C Aug | 5/4 mm, and not alone |
| Kokkola | 0.0°C Feb | 16.9°C Aug | 5/4 mm, and not alone |
| Kirkkonummi | 1.0°C Feb | 17.8°C Aug | 5/4 mm, and not alone |
| Rauma | 0.4°C Feb | 17.9°C Aug | 5/4 mm, and not alone |
| Raahe | 0.0°C Feb | 17.0°C Aug | 5/4 mm, and not alone |
| Tornio | -0.1°C Feb | 17.6°C Jul | 5/4 mm, and not alone |
| Jakobstad | 0.0°C Feb | 16.8°C Aug | 5/4 mm, and not alone |
| Kemi | -0.1°C Feb | 18.0°C Jul | 5/4 mm, and not alone |
| Uusikaupunki | 0.7°C Feb | 17.7°C Aug | 5/4 mm, and not alone |
| Närpes | 0.4°C Feb | 17.1°C Aug | 5/4 mm, and not alone |
Thicknesses above are for swimming. Surfing the same water wants a step more — most of a session is spent sitting still in the wind rather than moving and immersed. Each city page gives both, along with when you need boots, gloves and a hood.
Sea temperature and swimming season in Finland →
Boots below 14°C, gloves below 12°C, a hood below 10°C. Where the numbers come from