Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 17 Oct 2026:
- Best quality surf: Tuesday 20 Oct, 2AM (local time) - 3.5ft (1.1m), 15s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 23 Oct, 2PM (local time) - 18ft (5.5m), 13s period, W swell with 9,567 kJ wave energy.
- Next surfable swell (1★+): Monday 19 Oct, 11AM (local time) - 0.5ft (0.2m), 18s 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 Monday (Oct 19) at 11AM. The primary swell is predicted to be 0.2m and 18s period with a secondary swell of 0.4m and 9s. Another secondary swell of 0.2m and 10s is also forecast. 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 5.5m 13s and forecast to arrive on Friday (Oct 23) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Oct 17) at 11PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Mon 19th Oct) | 0.5ft (0.2m) 18s |
| Best Surf | 2AM (Tue 20th Oct) | 3.5ft (1.1m) 15s |
| Most Powerful | 2PM (Fri 23rd Oct) | 18ft (5.5m) 13s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 16°C on Sat afternoon, min 11°C on Sun night). Winds decreasing (strong winds from the NE on Sat night, light winds from the NW by Tue morning). | Days 5-7 Weather SummaryHeavy rain (total 39mm), heaviest during Thu night. Very mild (max 16°C on Thu afternoon, min 13°C on Wed morning). Winds increasing (light winds from the SW on Tue afternoon, near gales from the SW by Thu night). | |||||||||||||||||||
Sat 17 | Sunday 18 | Monday 19 | Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | ||||||||||||||
PM | 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) | W 12 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | NW 9 | W 16 | W 15 | W 13 | W 13 | WSW 6 | W 13 | W 13 | W 12 | W 11 | W 12 | WSW 10 | W 13 | W 13 | W 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 229 | 268 | 173 | 121 | 41 | 25 | 127 | 517 | 609 | 483 | 323 | 6139 | 5273 | 3264 | 3407 | 1589 | 4505 | 8856 | 9024 | 6042 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-on | cross-on | on | cross-on | on | on | on | cross-on | cross-on | on | on | on |
High Tide | 9:16PM2.94m | 9:44AM3.01m | 10:27PM2.71m | 11:17AM2.85m | 00:38AM2.68m | 1:14PM2.94m | 2:03AM2.90m | 2:17PM3.20m | 2:49AM3.19m | 3:00PM3.50m | 3:26AM3.51m | 3:37PM3.80m | 4:00AM3.82m | |||||||
Low Tide | 3:44PM1.34m | 4:04AM1.51m | 4:55PM1.54m | 5:22AM1.64m | 6:19PM1.55m | 6:45AM1.58m | 7:32PM1.38m | 7:52AM1.37m | 8:27PM1.09m | 8:42AM1.08m | 9:10PM0.78m | 9:24AM0.76m | 9:48PM0.47m | |||||||
 |  |  | | | | | | | |  |  |  |  | | |  | | | | |
 | — | — | 8:33 | — | — | 8:36 | — | — | 8:37 | — | — | 8:38 | — | — | 8:40 | — | — | 8:41 | — | — |
 | 7:22 | — | — | 7:20 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:10 | — |
mm | — | — | — | — | — | — | — | — | — | — | 9 | 2 | 1 | 5 | 3 | 2 | 17 | — | 2 | 1 |
Temp °C | 16 | 14 | 12 | 15 | 13 | 11 | 14 | 15 | 12 | 15 | 15 | 13 | 14 | 15 | 15 | 16 | 16 | 15 | 14 | 14 |
Feels °C | 8 | 5 | 5 | 8 | 6 | 7 | 10 | 10 | 9 | 9 | 9 | 2 | 5 | 7 | 8 | 11 | 10 | 8 | 4 | 4 |
Swell 1 Height (m) Direction Period (s) | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | NW 9 | W 16 | W 15 | W 13 | W 13 | WNW 12 | — | — | — | W 10 | W 12 | WNW 11 | — | — | — |
| kJ | 204 | 268 | 173 | 121 | 41 | 23 | 127 | 517 | 609 | 483 | 323 | — | — | — | 2310 | 1589 | 1846 | — | — | — |
Swell 2 Height (m) Direction Period (s) | W 12 | — | — | W 11 | NW 5 | W 10 | WNW 10 | WSW 11 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 229 | — | — | 21 | 7 | 8 | 9 | 71 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 10 | W 18 | W 13 | W 11 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 19 | 25 | 13 | 21 | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 4 | NE 5 | NE 4 | N 3 | NE 4 | E 3 | ESE 4 | — | — | SSW 2 | WSW 6 | W 13 | W 13 | W 12 | W 11 | SW 7 | WSW 10 | W 13 | W 13 | W 12 |
| kJ | 23 | 47 | 17 | 5 | 16 | 5 | 7 | — | — | 1 | 271 | 6139 | 5273 | 3264 | 3407 | 285 | 4505 | 8856 | 9024 | 6042 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 330 | 28 | 28 | 126 | 28 | 0 | 0 | 0 | 44 | 121 | 357 | 494 | 435 | 167 | 156 | 348 | 389 | 426 | 435 | 429 |
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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