Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 23 Sep 2026:
- Best quality surf: Wednesday 30 Sep, 8PM (local time) - 10ft (3.0m), 11s period, WSW swell with cross-shore winds.
- Most powerful swell: Wednesday 30 Sep, 8PM (local time) - 10ft (3.0m), 11s period, WSW swell with 2,226 kJ wave energy.
- Next surfable swell (1★+): Thursday 24 Sep, 2AM (local time) - 4.5ft (1.4m), 13s period with WNW 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 Thursday (Sep 24) at 2AM. The primary swell is predicted to be 1.4m and 13s period. 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 3.0m 11s and forecast to arrive on Wednesday (Sep 30) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Tuesday (Sep 29) at 11PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 24th Sep) | 4.5ft (1.4m) 13s |
| Best Surf | 8PM (Wed 30th Sep) | 10ft (3.0m) 11s |
| Most Powerful | 8PM (Wed 30th Sep) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
Short Range ForecastMostly dry. Warm (max 25°C on Thu night, min 14°C on Sat morning). Winds increasing (calm on Wed afternoon, fresh winds from the WNW by Fri night). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Sun night. Very mild (max 19°C on Tue morning, min 15°C on Sat night). Winds increasing (calm on Sun morning, strong winds from the SE by Tue morning). | |||||||||||||||||||
Wed 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | ||||||||||||||
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 14 | WNW 13 | WNW 12 | WNW 11 | WNW 11 | W 18 | W 16 | W 14 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | W 12 | WNW 12 | WNW 11 | SSE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 999 | 690 | 361 | 221 | 156 | 503 | 1742 | 1484 | 1174 | 703 | 497 | 370 | 297 | 286 | 503 | 614 | 650 | 462 | 325 | 374 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | off | off | cross-off | cross-off | cross-off | on | cross-on | cross-off | on | cross-off | glassy | on | cross-on | cross-off | cross-off | off | cross-off | cross | cross-on |
High Tide | 3:47PM3.56m | 4:08AM3.53m | 4:18PM3.86m | 4:38AM3.81m | 4:49PM4.12m | 5:07AM4.05m | 5:20PM4.33m | 5:38AM4.24m | 5:52PM4.45m | 6:10AM4.35m | 6:26PM4.46m | 6:44AM4.35m | 7:02PM4.36m | |||||||
Low Tide | 9:52PM0.77m | 10:04AM0.72m | 10:27PM0.46m | 10:39AM0.43m | 11:01PM0.20m | 11:13AM0.20m | 11:34PM0.02m | 11:47AM0.04m | 00:08AM-0.06m | 12:23PM-0.02m | 00:43AM-0.03m | 1:00PM0.02m | 1:21AM0.12m | |||||||
 |  | | | | | | |  | |  | | |  |  | | |  | |  | |
 | — | — | 8:00 | — | — | 8:02 | — | — | 8:03 | — | — | 8:04 | — | — | 8:06 | — | — | 8:07 | — | — |
 | 8:08 | — | — | 8:07 | — | — | 8:05 | — | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — | — | 7:57 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 2 | — | — | — | — |
Temp °C | 23 | 23 | 18 | 24 | 25 | 21 | 20 | 18 | 14 | 16 | 17 | 16 | 17 | 18 | 17 | 17 | 17 | 19 | 20 | 21 |
Feels °C | 20 | 21 | 14 | 22 | 24 | 20 | 19 | 14 | 11 | 16 | 14 | 16 | 15 | 17 | 17 | 15 | 15 | 14 | 15 | 17 |
Swell 1 Height (m) Direction Period (s) | W 14 | WNW 13 | WNW 12 | WNW 11 | WNW 11 | W 18 | W 16 | W 14 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | W 12 | WNW 12 | WNW 11 | WNW 11 |
| kJ | 999 | 690 | 361 | 221 | 156 | 503 | 1742 | 1484 | 1174 | 703 | 497 | 370 | 297 | 286 | 503 | 614 | 650 | 462 | 325 | 180 |
Swell 2 Height (m) Direction Period (s) | — | — | — | ESE 3 | — | WNW 10 | SSE 9 | — | — | — | — | W 18 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 2 | — | 104 | 8 | — | — | — | — | 6 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 10 | SSE 9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 2 | 8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NE 3 | E 4 | — | — | SE 3 | — | WNW 6 | — | — | — | — | — | — | — | — | — | SE 4 | SSE 6 | SSE 7 |
| kJ | — | 5 | 9 | — | — | 2 | — | 65 | — | — | — | — | — | — | — | — | — | 13 | 119 | 374 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 36 | 0 | 0 | 0 | 0 | 0 | 158 | 43 | 28 | 44 | 20 | 0 | 101 | 43 | 0 | 52 | 22 | 328 | 155 | 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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