Forte dei Marmi — Sea temperature now
Versilia beach with private-stabilimento culture.
Warm water with a light chop and a light breeze — great swimming conditions.
Location
Forte dei Marmi on the map, with nearby beaches and live sea temperatures.
7-day forecast
Water, air, waves, wind and UV outlook for the week ahead.
Monthly sea temperature averages
Typical year-round water temperature, based on regional climatology.
Best time to swim in Forte dei Marmi
The sea in Forte dei Marmi peaks in August, when the water averages around 26°C.
The main swimming season runs from June – October, when surface temperatures stay comfortable for extended sessions.
On average, 5 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
Shoulder months like May and November are noticeably cooler but often quieter, with fewer crowds and steadier weather.
Outside peak season the water drops toward 16°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable.
The coldest month is typically February at around 13°C, when cold-water swimmers dominate the coast.
Forte dei Marmi sea temperature history
Long-term climatology for Forte dei Marmi shows an annual mean sea temperature of 19°C, ranging from 13°C in winter to 26°C at the summer peak.
The seasonal swing is roughly 13°C between the coldest and warmest month — a useful yardstick when comparing years or checking whether the current sea is running above or below average.
Recent decades have trended slightly warmer at Forte dei Marmi, in line with regional sea-surface temperature records for the wider basin.
Monthly averages below are drawn from multi-decadal climatology and are updated as new observations arrive.
Forte dei Marmi sea temperature: frequently asked questions
What is the warmest month to swim in Forte dei Marmi?
August is the warmest month in Forte dei Marmi, when the sea averages about 26°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Forte dei Marmi?
The coldest month in Forte dei Marmi is typically February, when the water averages around 13°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Forte dei Marmi without a wetsuit?
The main swimming season in Forte dei Marmi runs from June – October — about 5 months a year when the sea sits above 20°C, the level most swimmers describe as pleasant without a wetsuit.
Do I need a wetsuit in Forte dei Marmi?
Outside peak summer the water in Forte dei Marmi drops toward 16°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable. In peak months most swimmers go without.
What is the average sea temperature in Forte dei Marmi?
The long-term annual mean sea temperature in Forte dei Marmi is about 19°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Forte dei Marmi?
The live reading at the top of this page shows the current sea temperature in Forte dei Marmi, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Year-round sea temperature
Best swim months: Jun – Jul – Aug – Sep – Oct
| Month | Sea | Comfort |
|---|---|---|
| Jan | 14°C | Bracing |
| Feb | 13°C | Cold |
| Mar | 14°C | Bracing |
| Apr | 16°C | Bracing |
| May | 19°C | Pleasant |
| Jun | 23°C | Warm |
| Jul | 25°C | Warm |
| Aug ⭐ | 26°C | Hot |
| Sep | 24°C | Warm |
| Oct | 21°C | Pleasant |
| Nov | 18°C | Pleasant |
| Dec | 15°C | Bracing |