Location
Grande Plage Carnac on the map, with nearby beaches and live sea temperatures.
7-day forecast
Water, air, waves, wind and UV outlook for the week ahead.
Check live temperature
Live water temperature is loading — refresh in a moment for a precise recommendation.
Recommendation tuned for Grande Plage Carnac's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.
Grande Plage Carnac swimming conditions summary
- Water temperature
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- Water feels
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- Swimmable today
- Loading live reading
- Swim conditions score
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- Wetsuit needed
- Check live temperature
- Air temperature
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- Waves
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- Wind
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- UV index
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- Warmest months to swim
- July, August, September
Live water temperature is loading — refresh in a moment for a precise recommendation. Live marine data updated hourly from Open-Meteo Marine.
Frequently asked questions
Can I swim at Grande Plage Carnac right now?
Live data is loading. Use the 7-day forecast above to plan your swim — conditions above 22°C are comfortable for most swimmers.
What will the sea temperature be at Grande Plage Carnac next week?
Based on long-term August averages and the latest marine model, expect the sea around Grande Plage Carnac to sit close to 24.0°C over the next 7 days. Check the live 7-day chart above for the exact daily outlook.
When is the best month to swim at Grande Plage Carnac?
July – August – September are typically the warmest months to swim at Grande Plage Carnac, with sea temperatures at their seasonal peak.
Can I swim at Grande Plage Carnac today?
Live data is loading. In summer, this beach typically offers comfortable swimming conditions.
- • Located in Brittany, France (Atlantic Ocean).
- • 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.
Best time to swim in Grande Plage Carnac
The sea in Grande Plage Carnac peaks in August, when the water averages around 24°C.
The main swimming season runs from June – September, when surface temperatures stay comfortable for extended sessions.
On average, 4 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
Shoulder months like May and October are noticeably cooler but often quieter, with fewer crowds and steadier weather.
Outside peak season the water drops toward 15°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable.
The coldest month is typically January at around 13°C, when cold-water swimmers dominate the coast.
Grande Plage Carnac sea temperature history
Long-term climatology for Grande Plage Carnac shows an annual mean sea temperature of 17°C, ranging from 13°C in winter to 24°C at the summer peak.
The seasonal swing is roughly 11°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 Grande Plage Carnac, 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.
Grande Plage Carnac sea temperature: frequently asked questions
What is the warmest month to swim in Grande Plage Carnac?
August is the warmest month in Grande Plage Carnac, when the sea averages about 24°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Grande Plage Carnac?
The coldest month in Grande Plage Carnac is typically January, when the water averages around 13°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Grande Plage Carnac without a wetsuit?
The main swimming season in Grande Plage Carnac runs from June – September — about 4 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 Grande Plage Carnac?
Outside peak summer the water in Grande Plage Carnac drops toward 15°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 Grande Plage Carnac?
The long-term annual mean sea temperature in Grande Plage Carnac is about 17°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Grande Plage Carnac?
The live reading at the top of this page shows the current sea temperature in Grande Plage Carnac, 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
| 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 |
Nearby beaches
The closest coastline, with live water temperatures.