Italy: where to swim in May?
Italy, in May: the sea is at 17.9 °C on average along the coast, from 17.3 °C to 18.5 °C depending on the spot. Where the water is warmest (18.5 °C), it is cool. Swimming is fine if you like cool water: you get used to it after a few minutes, especially in mild weather.
Sea temperature, month by month
| Month | Average temperature | Depending on the spot | Where it is warmest |
|---|---|---|---|
| January | 14.9 °C | 14.1 °C – 15.7 °C | cool |
| February | 14.3 °C | 13.6 °C – 15.1 °C | cool |
| March | 14.1 °C | 13.4 °C – 15.0 °C | cool |
| April | 15.5 °C | 14.7 °C – 16.1 °C | cool |
| May | 17.9 °C | 17.3 °C – 18.5 °C | cool |
| June | 22.5 °C | 21.9 °C – 23.3 °C | warm |
| July | 25.6 °C | 24.5 °C – 26.6 °C | warm |
| August | 26.5 °C | 25.7 °C – 27.4 °C | very warm |
| September | 25.2 °C | 24.0 °C – 26.3 °C | warm |
| October | 22.2 °C | 20.5 °C – 23.5 °C | warm |
| November | 19.4 °C | 17.9 °C – 20.6 °C | pleasant |
| December | 16.5 °C | 15.4 °C – 17.6 °C | cool |
Compared with April, the water warms up by 2.4 °C in May. The warmest month: August (26.5 °C). The coldest: March (14.1 °C).
Nearby, in May
- Croatia 17.4 °C · cool
- France 14.8 °C · cool
- Germany 10.6 °C · cold
- Netherlands 10.6 °C · cold
- Poland 9.1 °C · cold
- Denmark 10.1 °C · cold
And right now?
For the temperature measured right now, station by station and to the hour: Italy: water temperature
Frequently asked questions
What is the sea temperature in May?
Italy, in May: 17.9 °C on average along the coast, from 17.3 °C in the coolest waters to 18.5 °C in the warmest (average of the years 2011 to 2025).
Can you swim in May?
Where the water is warmest (18.5 °C), it is cool. Swimming is fine if you like cool water: you get used to it after a few minutes, especially in mild weather.
What is the best month for swimming?
The water is warmest in August (26.5 °C on average) and coldest in March (14.1 °C). Where the water is warmest, it goes above 20 °C in these months: June, July, August, September, October, November.
Where is the water warmest in May?
The warmest in May: Croatia (17.4 °C), France (14.8 °C), Germany (10.6 °C). The coolest: Denmark (10.1 °C).
Where do these temperatures come from?
These are averages of the sea surface temperature from 2011 to 2025, computed from NOAA satellite images (OISST, one value about every 50 km), in a 100 km strip along the coasts of the main country: distant territories (overseas, remote islands) are not counted. It is an estimate, not a measurement taken at the beach: lakes and rivers are not included.