canIswim

Sea temperature and swimming season in French Guiana

When the sea is warm enough to swim in 3 coastal cities in French Guiana.

CityWarmestColdestSwimming season
Cayenne 29.0°C Oct 27.4°C Feb all year
Kourou 29.0°C Oct 27.3°C Feb all year
Mana 28.9°C Oct 27.1°C Feb all year

Season uses 19°C. Why that number, and where the data comes from