canIswim

Sea temperature and swimming season in Brazil

When the sea is warm enough to swim in 15 coastal cities in Brazil.

CityWarmestColdestSwimming season
Salvador 28.8°C Mar 25.8°C Aug all year
Fortaleza 29.3°C Apr 26.9°C Sep all year
Recife 29.2°C Apr 26.4°C Aug all year
Belém 29.8°C Jun 28.9°C Feb all year
Maceió 29.0°C Apr 26.2°C Aug all year
São Luís 29.4°C May 28.2°C Oct all year
Natal 29.1°C Mar 26.6°C Aug all year
Aracaju 28.9°C Apr 26.0°C Aug all year
Joinville 27.7°C Feb 18.8°C Aug Sep – Jul (11 months)
Macapá 30.0°C Oct 28.7°C Feb all year
Florianópolis 26.6°C Feb 17.9°C Jul Oct – Jun (9 months)
Barra da Tijuca 26.5°C Feb 21.9°C Aug all year
Santos 27.7°C Feb 20.9°C Aug all year
Vitória 26.9°C Mar 23.3°C Aug all year
Ilhéus 28.8°C Mar 25.5°C Aug all year

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