Grande Plage de Saint-Malo Water Temperature & Swim Forecast
Central Saint-Malo tidal beach.
Mild water with a light chop and a light breeze — comfortable conditions for most swimmers.
Model estimate · modelled, not a buoy measurement. How accurate is this?
Location
Grande Plage de Saint-Malo on the map, with nearby beaches and live sea temperatures.
7-day forecast
Water, air, waves, wind and UV outlook for the week ahead.
3/2mm fullsuit
At 18.4°C a 3/2mm fullsuit is the standard wetsuit for surfing and watersports.
Recommendation tuned for Grande Plage de Saint-Malo's current water temperature. Individual tolerance, wind chill, and session length all matter — when in doubt, size up.
Grande Plage de Saint-Malo swimming conditions summary
- Water temperature
- 18.4°C
- Water feels
- Refreshing
- Swimmable today
- Yes, but fresh — short swims or a wetsuit
- Swim conditions score
- 68/100 · Good
- Wetsuit needed
- 3/2mm fullsuit
- Air temperature
- —
- Waves
- —
- Wind
- —
- UV index
- —
- Average sea temperature (October)
- 19.0 °C
- Warmest months to swim
- July, August, September
At 18.4°C a 3/2mm fullsuit is the standard wetsuit for surfing and watersports. Model estimate. Water, wave, wind and UV values are Open-Meteo marine/weather model estimates, refreshed hourly — not buoy measurements.
Frequently asked questions
Can I swim at Grande Plage de Saint-Malo right now?
The sea at Grande Plage de Saint-Malo is currently 18.4°C — fresh swimming conditions. Most swimmers will find the water comfortable when it's above 22°C; below 18°C feels fresh and a wetsuit is recommended.
What will the sea temperature be at Grande Plage de Saint-Malo next week?
Based on long-term October averages and the latest marine model, expect the sea around Grande Plage de Saint-Malo to sit close to 19.0°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 de Saint-Malo?
July – August – September are typically the warmest months to swim at Grande Plage de Saint-Malo, with sea temperatures at their seasonal peak.
Do I need a wetsuit at Grande Plage de Saint-Malo?
With water currently at 18.4°C: above 22°C no wetsuit needed; 18–22°C a shorty is comfortable for long swims; 14–18°C a 3/2mm full suit; below 14°C a 4/3mm or thicker.
Can I swim at Grande Plage de Saint-Malo today?
The sea is currently 18.4°C — good swimming conditions. Most swimmers will find it pleasant.
- • Located in Brittany, France (English Channel).
- • 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 de Saint-Malo
The sea in Grande Plage de Saint-Malo 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 de Saint-Malo sea temperature history
Long-term climatology for Grande Plage de Saint-Malo 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 de Saint-Malo, 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 de Saint-Malo sea temperature: frequently asked questions
What is the warmest month to swim in Grande Plage de Saint-Malo?
August is the warmest month in Grande Plage de Saint-Malo, 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 de Saint-Malo?
The coldest month in Grande Plage de Saint-Malo 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 de Saint-Malo without a wetsuit?
The main swimming season in Grande Plage de Saint-Malo 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 de Saint-Malo?
Outside peak summer the water in Grande Plage de Saint-Malo 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 de Saint-Malo?
The long-term annual mean sea temperature in Grande Plage de Saint-Malo is about 17°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Grande Plage de Saint-Malo?
The live reading at the top of this page shows the current sea temperature in Grande Plage de Saint-Malo, 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.