Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 5 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 11AM (local time) - 1.5ft (0.5m), 11s period, W swell with offshore winds.
- Most powerful swell: Wednesday 5 Aug, 11PM (local time) - 5ft (1.5m), 7s period, WNW swell with 237 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 11AM (local time) - 1.5ft (0.5m), 11s 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 Wednesday (Aug 12) at 11AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.1m and 6s. 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 1.5m 7s and forecast to arrive on Wednesday (Aug 05) at 11PM. Winds are predicted to be cross-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 Tuesday (Aug 11) at 8AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Wed 12th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 11AM (Wed 12th Aug) | 1.5ft (0.5m) 11s |
| Most Powerful | 11PM (Wed 5th Aug) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
The Lowdown
Hey, Rusty here with a look at what’s coming up for Belle Ile - Les Donnants.
Right now and through the next several days, it’s pretty quiet. We’ve got small, weak swells rolling in—mostly around 0.6ft to 2ft—and the wind’s all over the place, often onshore or cross-onshore, keeping things choppy and messy. The water’s sitting at 68°F, just a touch warmer than usual for this time of year. Nothing really worth paddling out for yet; the scores are flat zeros for most sessions.
We do see a bit of a shift starting Wednesday the 12th. That morning brings a clean, offshore breeze from the ENE at 12 mph, and while the swell’s still small at 1.6ft from the west with a 11-second period, the combined energy bumps up to 64. It’s surfable but ordinary—still a step up from the days before. Thursday the 13th morning looks similar: clean again with a light cross-offshore flow, 2.6ft swell and a bit more energy at 114. Still nothing to get excited about, but at least the surface is clean.
The standout window rolls in late Monday the 17th. Afternoon sees a jump in swell height to 7.2ft from the WNW with a 11-second period, and the combined energy hits 1227—that’s real power. Unfortunately, the wind is howling onshore at 22 mph, so conditions will be blown out and tough. That’s a set-up for experienced crew only; beginners should stay well clear. The morning before that also has 5.9ft but with onshore wind again.
Through the rest of the outlook, it’s mostly onshore winds and small, short-period swell, with few windows of clean conditions. If you’re after a wave in the next two weeks, the cleanest moments are the mornings of the 12th and 13th, but don’t expect much size. The bigger pulse on the 17th has the height but needs perfect wind to shine.
Short Range ForecastMostly dry. Warm (max 23°C on Fri afternoon, min 15°C on Thu morning). Winds decreasing (fresh winds from the WNW on Wed night, light winds from the E by Fri afternoon). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sun morning. Warm (max 26°C on Sat afternoon, min 17°C on Sat morning). Winds increasing (calm on Sun morning, fresh winds from the WNW by Mon night). | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
AM | 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 7 | W 8 | WNW 7 | WNW 7 | WNW 7 | WNW 6 | W 10 | W 9 | W 9 | W 9 | W 9 | NW 10 | NW 9 | NW 9 | NW 5 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 152 | 213 | 181 | 53 | 45 | 31 | 16 | 15 | 7 | 7 | 7 | 24 | 21 | 40 | 31 | 31 | 50 | 48 | 26 | 26 | 12 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross | on | cross-off | cross-off | on | cross-off | off | on | cross | glassy | on | cross-on | cross-on | on | cross-off | cross-off | on | cross-off |
High Tide | 9:32AM3.60m | 9:55PM3.62m | 10:25AM3.43m | 10:56PM3.39m | 11:36AM3.29m | 00:22AM3.23m | 1:10PM3.29m | 2:02AM3.29m | 2:40PM3.50m | 3:21AM3.52m | 3:47PM3.83m | 4:21AM3.80m | 4:40PM4.17m | ||||||||
Low Tide | 3:58PM0.83m | 4:30AM0.88m | 4:58PM1.01m | 5:35AM1.06m | 6:13PM1.11m | 6:52AM1.14m | 7:35PM1.04m | 8:10AM1.03m | 8:51PM0.81m | 9:19AM0.78m | 9:55PM0.48m | 10:16AM0.48m | 10:49PM0.17m | ||||||||
 | |  | | | | | |  |  | | |  | | | | | | | | | |
 | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — |
 | — | — | 9:40 | — | — | 9:39 | — | — | 9:37 | — | — | 9:37 | — | — | 9:35 | — | — | 9:32 | — | — | 9:31 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — |
Temp °C | 19 | 19 | 18 | 16 | 18 | 19 | 16 | 23 | 22 | 18 | 26 | 26 | 21 | 22 | 22 | 18 | 22 | 23 | 19 | 25 | 24 |
Feels °C | 16 | 16 | 12 | 14 | 13 | 14 | 12 | 20 | 17 | 13 | 23 | 21 | 19 | 20 | 18 | 16 | 18 | 18 | 17 | 22 | 20 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 8 | W 10 | WNW 7 | W 10 | WNW 6 | W 10 | W 9 | W 9 | W 9 | ESE 3 | NW 10 | NW 9 | NW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 |
| kJ | 152 | 213 | 8 | 53 | 17 | 31 | 16 | 15 | 7 | 7 | 1 | 24 | 21 | 40 | 30 | 31 | 50 | 48 | 26 | 26 | 12 |
Swell 2 Height (m) Direction Period (s) | — | — | W 10 | W 10 | — | W 10 | WNW 6 | WNW 6 | WNW 6 | NW 6 | W 9 | W 7 | WSW 6 | W 9 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | W 10 | SE 4 | W 9 |
| kJ | — | — | 8 | 18 | — | 17 | 6 | 3 | 3 | 1 | 7 | 1 | 4 | 1 | 9 | 9 | 9 | 4 | 8 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | ESE 3 | — | W 12 | NW 11 | W 9 | W 9 | — | WNW 9 | WNW 4 | — | W 11 | SW 7 | ENE 4 | W 6 |
| kJ | — | — | — | — | — | — | — | 1 | — | 3 | 5 | 2 | 2 | — | 15 | 2 | — | 2 | 2 | 2 | 1 |
Wind waves Height (m) Direction Period (s) | — | — | WNW 7 | — | WNW 7 | NE 4 | ENE 4 | ENE 3 | NE 4 | E 4 | — | — | NW 3 | WNW 4 | NW 5 | NE 2 | N 3 | NE 4 | E 5 | — | NE 3 |
| kJ | — | — | 181 | — | 45 | 15 | 11 | 4 | 16 | 6 | — | — | 5 | 25 | 31 | 1 | 1 | 20 | 41 | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 90 | 436 | 36 | 49 | 426 | 347 | 277 | 582 | 377 | 356 | 346 | 90 | 118 | 350 | 90 | 90 | 350 | 90 | 43 | 436 | 277 |
Best forecast wave conditions in Morbihan - Brittany | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
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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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