France
Provence · Mediterranean Sea
Plage de la Grande Mer
Beach near Cassis.
Warm water with calm seas and a light breeze — great swimming conditions.
Sea temperature now
26.2°Chot
Excellent
Updated just now · Source: Open-Meteo Marine
Air temperature
32.6°C
Wave height
0.2 m
Wind
11.8 km/h
UV index
7.0 UV index
Location
Plage de la Grande Mer on the map, with nearby beaches and live sea temperatures.
7-day forecast
Water, air, waves, wind and UV outlook for the week ahead.
Wetsuit recommendation
No wetsuit
At 26.2°C the water is warm enough to swim and surf in just a swimsuit or boardshorts.
Surf & watersports
Tropical-feel conditions. Most swimmers stay comfortable for an hour or more without thermal protection. UV exposure is the bigger risk — sunscreen and a rash vest are worth packing.
Open-water swimming
Open-water swims of 60+ minutes feel comfortable with no neoprene.
Recommendation tuned for Plage de la Grande Mer's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.
Quick answer
Can I swim at Plage de la Grande Mer today?
The sea is currently 26.2°C — excellent swimming conditions. Most swimmers will find it pleasant.
Key takeaways
- • Located in Provence, France (Mediterranean Sea).
- • Family friendly with calm, accessible water.
- • Live data refreshed hourly from Open-Meteo Marine.
Monthly sea temperature averages
Tap any month to see what to expect — based on regional climatology.
13°C → 24°C· Current month outlined· “Best” = within 2°C of the annual peak
Year-round sea temperature
Best swim months: Jun – Jul – Aug – Sep
| Month | Sea | Comfort |
|---|---|---|
| Jan | 13°C | Cold |
| Feb | 13°C | Cold |
| Mar | 13°C | Cold |
| Apr | 14°C | Bracing |
| May | 17°C | Bracing |
| Jun | 20°C | Pleasant |
| Jul | 23°C | Warm |
| Aug ⭐ | 24°C | Warm |
| Sep | 22°C | Warm |
| Oct | 19°C | Pleasant |
| Nov | 16°C | Bracing |
| Dec | 14°C | Bracing |
Can you swim here? — Plage de la Grande Mer
Warmer nearby
Same region this month — Provence
Nearby beaches
The closest coastline, with live water temperatures.