What wetsuit do you need in Italy?

The one suit that covers most of the swimming season, for 16 coastal cities in Italy.

City	Coldest	Warmest	One suit for the season
Naples	14.7°C Mar	27.2°C Aug	nothing
Palermo	15.2°C Feb	28.1°C Aug	nothing
Genoa	14.2°C Feb	26.5°C Aug	nothing
Bari	14.2°C Mar	26.8°C Aug	nothing
Catania	15.0°C Mar	27.3°C Aug	nothing
Messina	15.0°C Mar	27.9°C Aug	nothing
Trieste	10.2°C Feb	26.4°C Aug	nothing
Livorno	14.1°C Mar	26.4°C Aug	nothing
Cagliari	14.7°C Feb	26.8°C Aug	nothing
Salerno	14.7°C Mar	27.0°C Aug	nothing
Siracusa	15.2°C Mar	27.6°C Aug	nothing
Crotone	14.6°C Mar	27.3°C Aug	nothing
Venice	9.3°C Feb	26.9°C Aug	nothing
Nettuno	14.6°C Mar	26.8°C Aug	nothing
Capri	14.9°C Mar	27.4°C Aug	nothing
Campora San Giovanni	15.0°C Mar	28.2°C Aug	nothing

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 Italy →

Boots below 14°C, gloves below 12°C, a hood below 10°C. Where the numbers come from