Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 21 Aug 2026:
- Best quality surf: Saturday 22 Aug, 2PM (local time) - 1.5ft (0.5m), 10s period, W swell with offshore winds.
- Most powerful swell: Friday 28 Aug, 8PM (local time) - 11ft (3.5m), 9s period, WSW swell with 1,981 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 2PM (local time) - 1.5ft (0.5m), 10s period with W swell.
Best Forecast Surf Conditions for Belle Ile - Les Donnants this week:
The surf forecast for Belle Ile - Les Donnants over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 22) at 2PM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.5m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Belle Ile - Les Donnants in the next 16 days are 3.5m 9s and forecast to arrive on Friday (Aug 28) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Aug 23) at 5AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 22nd Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 2PM (Sat 22nd Aug) | 1.5ft (0.5m) 10s |
| Most Powerful | 8PM (Fri 28th Aug) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon afternoon. Warm (max 27°C on Sun night, min 15°C on Fri night). Winds increasing (calm on Sat afternoon, strong winds from the ENE by Sun night). | Days 5-7 Weather SummaryModerate rain (total 16mm), heaviest on Wed night. Warm (max 21°C on Mon night, min 18°C on Wed morning). Winds decreasing (fresh winds from the SW on Tue afternoon, light winds from the SSW by Wed night). | ||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | WNW 9 | WNW 8 | W 10 | W 9 | W 9 | WSW 12 | WSW 10 | WSW 9 | WSW 9 | SW 9 | SW 8 | SSW 8 | SW 8 | SW 7 | SW 7 | SW 7 | WSW 8 | W 7 | W 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 233 | 51 | 45 | 25 | 13 | 48 | 57 | 35 | 32 | 38 | 70 | 84 | 427 | 152 | 85 | 103 | 257 | 392 | 309 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | cross-off | off | cross-off | cross-off | off | cross-off | cross | cross | cross-on | cross-on | cross | cross | cross | on | on | on |
High Tide | 00:19AM2.73m | 1:22PM2.84m | 2:25AM2.79m | 2:53PM3.02m | 3:27AM3.01m | 3:44PM3.28m | 4:08AM3.25m | 4:21PM3.56m | 4:40AM3.50m | 4:52PM3.83m | 5:10AM3.73m | 5:22PM4.06m | |||||||
Low Tide | 6:45AM1.61m | 7:35PM1.54m | 8:05AM1.53m | 8:48PM1.37m | 9:08AM1.31m | 9:41PM1.11m | 9:56AM1.03m | 10:24PM0.82m | 10:35AM0.75m | 11:00PM0.55m | 11:11AM0.50m | 11:34PM0.32m | |||||||
 |  |  |  | | | |  | |  | |  | | | |  | | | | |
 | — | 7:16 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:24 | — | — |
 | 9:15 | — | — | 9:13 | — | — | 9:10 | — | — | 9:08 | — | — | 9:07 | — | — | 9:05 | — | — | 9:02 |
mm | — | — | — | — | — | — | — | 1 | 4 | 1 | 1 | 2 | — | 3 | 2 | 3 | 3 | 1 | 13 |
Temp °C | 19 | 15 | 20 | 21 | 17 | 25 | 27 | 17 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 18 | 18 |
Feels °C | 14 | 12 | 19 | 16 | 9 | 19 | 20 | 8 | 20 | 21 | 21 | 18 | 17 | 19 | 19 | 20 | 16 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 8 | W 10 | W 9 | W 9 | WSW 12 | WSW 10 | WSW 9 | ESE 4 | SSE 5 | WNW 11 | WNW 10 | SW 8 | WNW 9 | SW 7 | W 8 | W 8 | — | W 8 |
| kJ | 233 | 37 | 45 | 25 | 13 | 48 | 57 | 35 | 13 | 14 | 12 | 11 | 427 | 27 | 85 | 46 | 41 | — | 309 |
Swell 2 Height (m) Direction Period (s) | — | W 8 | WNW 7 | NW 7 | WNW 7 | SE 5 | NW 6 | SW 12 | WSW 9 | SW 9 | W 8 | W 8 | WNW 10 | WNW 9 | WNW 9 | W 11 | NW 8 | — | SW 7 |
| kJ | — | 51 | 20 | 14 | 5 | 9 | 2 | 6 | 32 | 38 | 1 | 1 | 19 | 32 | 25 | 2 | 3 | — | 48 |
Swell 3 Height (m) Direction Period (s) | — | W 10 | — | — | SW 14 | NW 7 | W 10 | — | W 9 | W 9 | W 8 | W 8 | — | — | — | — | — | — | — |
| kJ | — | 8 | — | — | 8 | 2 | 2 | — | 2 | 2 | 1 | 1 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNE 3 | NE 3 | — | ENE 4 | E 5 | ENE 4 | ENE 5 | E 5 | — | — | SW 8 | SSW 8 | — | SW 7 | SSE 4 | SW 7 | WSW 8 | W 7 | — |
| kJ | 3 | 1 | — | 27 | 81 | 19 | 57 | 63 | — | — | 70 | 84 | — | 152 | 5 | 103 | 257 | 392 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 36 | 20 | 0 | 277 | 343 | 20 | 258 | 343 | 119 | 30 | 20 | 121 | 101 | 118 | 121 | 31 | 90 | 328 | 156 |
Best forecast wave conditions in Morbihan - Brittany | |||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Belle Ile - Les Donnants Surf forecast
The above surf forecast table for Belle Ile - Les Donnants provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Belle Ile - Les Donnants can be found by selecting the local surf guide option on the grey menu. Our Belle Ile - Les Donnants surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Belle Ile - Les Donnants) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Belle Ile - Les Donnants may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Belle Ile - Les Donnants is 48 km (30 miles) from Lorient. If you plan a holiday in Morbihan - Brittany, look for hotels and other accommodation in Lorient. Lorient has rooms for a wide range of budgets as well as car hire and transport links.
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