Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 26 Jul 2026:
- Best quality surf: Tuesday 28 Jul, 11AM (local time) - 2.5ft (0.8m), 10s period, WNW swell with offshore winds.
- Most powerful swell: Monday 27 Jul, 2AM (local time) - 5ft (1.5m), 9s period, WNW swell with 344 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 11AM (local time) - 2.5ft (0.8m), 10s 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 Tuesday (Jul 28) at 11AM. The primary swell is predicted to be 0.8m and 10s 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 1.5m 9s and forecast to arrive on Monday (Jul 27) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Tuesday (Jul 28) at 8AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Tue 28th Jul) | 2.5ft (0.8m) 10s |
| Best Surf | 11AM (Tue 28th Jul) | 2.5ft (0.8m) 10s |
| Most Powerful | 2AM (Mon 27th Jul) | 5ft (1.5m) 9s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
The Lowdown
Alright, Rusty here again, with the same outlook in feet and miles per hour.
We’re looking at a long stretch ahead, and I’m not gonna sugarcoat it—the ocean is going to be sleeping for a good while. The first chance to even get wet isn’t until the morning of Tuesday, July 28th. The weekend before that is a total loss with onshore winds and messy conditions.
So, Tuesday morning. Belle Ile - Les Donnants (river break) is the only option. It’s a consistent spot, which helps, but the swell is small at 3ft from the WNW with a 10-second period. The energy is weak (107). The big plus? Offshore wind from the East at 12 mph. That’ll keep the surface glassy. It’s not going to be a barnburner, but for a beginner, it’s a clean little session. The water temp is about where it should be for this time of year.
After that, it’s a slog. Wednesday morning the 29th goes glassy with a light breeze, but the swell drops to just 2ft. It’s surfable, but you’ll be fighting for a ride. The energy is a weak 54. Thursday through the weekend are all duds with onshore wind and tiny, weak swell.
We push through a long dry spell until we finally get a proper stand-out window. That comes on the morning of Monday, August 10th. That’s over a week out, so it’s a promise, not a guarantee, but it looks good. The swell comes up to a clean 5ft from the WNW with a 9-second period, and the energy jumps to a solid 360 (moderate). The wind is offshore from the North at 9 mph, and conditions are clean. This is the one. It’s not huge, but it’s a proper, surfable wave with good shape for a river mouth. The consistency here is a strong point, so pencil it in.
Everything else in the second week is flat or junk. Small, onshore, weak.
So, bottom line: a whole lot of waiting, a tiny clean window on the 28th, and one real standout to aim for on the morning of Monday, August 10th. If you’re keen, hold out for that Monday.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Tue afternoon, min 16°C on Mon morning). Winds decreasing (strong winds from the WNW on Sat night, light winds from the SE by Tue afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Tue night, min 18°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | ||||||||||||||
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 6 | WNW 6 | WNW 6 | WNW 9 | WNW 9 | WNW 9 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 5 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | WNW 4 |
Wave Graph  | |||||||||||||||||||
 kJ | 112 | 92 | 154 | 344 | 218 | 227 | 218 | 107 | 78 | 73 | 44 | 42 | 46 | 26 | 68 | 37 | 58 | 43 | 40 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | cross-on | on | cross-off | off | on | cross-on | glassy | on | cross-on | cross-on | on | cross-off | cross-off | on | on |
High Tide | 3:41AM3.12m | 4:00PM3.35m | 4:24AM3.30m | 4:40PM3.56m | 5:00AM3.47m | 5:14PM3.76m | 5:33AM3.63m | 5:47PM3.93m | 6:04AM3.75m | 6:18PM4.06m | 6:35AM3.84m | 6:49PM4.14m | |||||||
Low Tide | 9:07PM1.24m | 9:28AM1.20m | 10:00PM1.05m | 10:16AM1.01m | 10:44PM0.84m | 10:58AM0.80m | 11:24PM0.65m | 11:35AM0.62m | 00:01AM0.49m | 12:11PM0.48m | 00:36AM0.38m | 12:45PM0.39m | 1:10AM0.32m | ||||||
 |  |  |  | | | | | | | | | | | |  | | | | |
 | — | 6:43 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — |
 | 9:55 | — | — | 9:54 | — | — | 9:52 | — | — | 9:52 | — | — | 9:51 | — | — | 9:50 | — | — | 9:47 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 19 | 19 | 19 | 16 | 19 | 21 | 20 | 27 | 28 | 25 | 26 | 22 | 18 | 19 | 23 | 19 | 22 | 22 |
Feels °C | 12 | 16 | 16 | 13 | 14 | 17 | 20 | 16 | 24 | 25 | 23 | 24 | 20 | 17 | 19 | 21 | 18 | 22 | 19 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 9 | NW 11 | WNW 10 | WNW 9 | WNW 9 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 10 | WNW 8 | W 10 | NW 5 | WNW 8 | WNW 7 | W 12 |
| kJ | 8 | 7 | 19 | 41 | 218 | 227 | 218 | 107 | 78 | 73 | 44 | 42 | 20 | 26 | 17 | 23 | 58 | 43 | 3 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SSW 5 | — | WNW 10 | — | ESE 3 | — | W 11 | W 11 | — | W 10 | W 10 | WNW 8 | — | ENE 3 | W 12 |
| kJ | — | — | — | — | 2 | — | 74 | — | 2 | — | 10 | 9 | — | 17 | 8 | 37 | — | 1 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 5 | W 10 | W 10 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 8 | 8 | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 6 | WNW 6 | WNW 6 | WNW 9 | — | — | NE 3 | E 4 | — | — | — | WNW 2 | WNW 5 | WNW 4 | WNW 8 | NNE 3 | ENE 4 | — | WNW 4 |
| kJ | 112 | 92 | 154 | 344 | — | — | 3 | 16 | — | — | — | 1 | 46 | 7 | 68 | 4 | 7 | — | 40 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 185 | 435 | 437 | 44 | 36 | 158 | 28 | 0 | 101 | 49 | 0 | 158 | 90 | 90 | 158 | 47 | 0 | 225 | 47 |
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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