Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 29 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 11AM (local time) - 2ft (0.6m), 9s period, WNW swell with glassy winds.
- Most powerful swell: Monday 3 Aug, 8PM (local time) - 3.5ft (1.1m), 8s period, W swell with 165 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 11AM (local time) - 2ft (0.6m), 9s 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 Wednesday (Jul 29) at 11AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.2m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Belle Ile - Les Donnants in the next 16 days are 1.1m 8s and forecast to arrive on Monday (Aug 03) 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 0.9m 4s period and expected on Sunday (Aug 02) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Wed 29th Jul) | 2ft (0.6m) 9s |
| Best Surf | 11AM (Wed 29th Jul) | 2ft (0.6m) 9s |
| Most Powerful | 8PM (Mon 3rd Aug) | 3.5ft (1.1m) 8s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s shaping up for the next couple of weeks.
To be straight with you, the forecast is looking pretty bleak for a solid paddle. We’ve got a long stretch of small, weak, and often messy waves on offer. The whole first week is a write-off for anything decent, with only a few brief moments of surfable but very ordinary conditions. The real standout, if you can call it that, is a promising window right at the very end of the outlook.
We kick off on Wednesday, 29 July, with a tiny 0.6m swell from the WNW at Belle Ile - Les Donnants (river). It’s glassy in the morning with light winds, but the combined energy is a weak 71, so it’s not doing much. The water temp is about average for the time of year, so nothing unusual there. By the afternoon, the wind swings onshore and that’s it for the day.
From Thursday the 30th right through to Monday the 10th of August, it’s a real slog. The swell barely budges, mostly hanging around 0.5m to 1.0m, with periods dropping as low as 6 seconds. The wind is almost always onshore, cross-on, or just creating chop. There are a few mornings with clean conditions, like Saturday the 1st and Sunday the 2nd, but the swell is too small and weak to get excited about – combined energy values are often under 100. It’s just not worth suiting up.
We get a small glimmer on Tuesday the 11th of August. The morning shows a 0.8m WNW swell with a cross-offshore breeze and clean conditions. The energy is still weak at 96, but it’s surfable. It’s not a standout, though.
Now, the best on offer comes on Thursday the 13th of August. The morning looks promising. We’ve got a 1.8m swell from the west, with a period of 9 seconds, giving it a moderate energy of 551. The wind is cross-offshore from the NE at 15 km/h, which should keep it clean. The water temp is still average for the time of year. This is the only time in the entire 16-day window that the forecast expects very good surf conditions. It’s over a week away, so keep an eye on it, but for now, that’s the one to target.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Tue night, min 16°C on Thu morning). Winds increasing (calm on Wed morning, fresh winds from the WNW by Thu night). | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Sun afternoon, min 15°C on Fri night). Winds decreasing (fresh winds from the WNW on Fri night, light winds from the NW by Sun afternoon). | ||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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 9 | WNW 9 | NW 4 | WNW 8 | WNW 8 | WNW 5 | WNW 7 | WNW 8 | WNW 6 | W 10 | W 9 | W 9 | W 8 | WNW 8 | W 10 | W 8 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 71 | 61 | 42 | 32 | 40 | 68 | 25 | 11 | 73 | 55 | 31 | 41 | 39 | 35 | 73 | 68 | 50 | 91 | 84 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | on | cross-on | cross-on | on | cross-off | cross | on | cross | cross-off | cross-on | cross-off | cross-off | on | cross-off | cross-on | on | cross |
High Tide | 5:33AM3.63m | 5:47PM3.93m | 6:04AM3.75m | 6:18PM4.06m | 6:35AM3.84m | 6:49PM4.14m | 7:06AM3.88m | 7:20PM4.15m | 7:38AM3.88m | 7:53PM4.10m | 8:12AM3.83m | 8:28PM4.00m | |||||||
Low Tide | 11:24PM0.65m | 11:35AM0.62m | 00:01AM0.49m | 12:11PM0.48m | 00:36AM0.38m | 12:45PM0.39m | 1:10AM0.32m | 1:18PM0.37m | 1:43AM0.33m | 1:53PM0.41m | 2:18AM0.39m | 2:29PM0.51m | 2:56AM0.51m | ||||||
 | | |  | | |  |  | | |  | | | | |  | | | | |
 | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — |
 | 9:52 | — | — | 9:51 | — | — | 9:50 | — | — | 9:47 | — | — | 9:46 | — | — | 9:45 | — | — | 9:44 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 20 | 21 | 20 | 17 | 19 | 21 | 17 | 20 | 22 | 17 | 20 | 22 | 18 | 23 | 23 | 18 | 19 | 20 |
Feels °C | 21 | 20 | 20 | 19 | 17 | 16 | 16 | 14 | 16 | 14 | 13 | 17 | 17 | 14 | 19 | 17 | 15 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | W 10 | WNW 5 | NW 5 | W 12 | WNW 6 | W 10 | W 9 | WNW 6 | W 8 | W 8 | WNW 5 | W 8 | W 8 | W 8 |
| kJ | 71 | 61 | 42 | 26 | 40 | 17 | 19 | 7 | 3 | 55 | 31 | 41 | 21 | 35 | 35 | 22 | 50 | 91 | 84 |
Swell 2 Height (m) Direction Period (s) | W 12 | W 11 | W 11 | WNW 10 | NW 4 | WNW 10 | WNW 8 | WNW 7 | W 12 | W 11 | NW 5 | WNW 7 | W 9 | WNW 6 | NE 3 | W 10 | W 10 | — | — |
| kJ | 3 | 10 | 9 | 19 | 4 | 19 | 25 | 11 | 3 | 10 | 7 | 5 | 39 | 4 | 2 | 68 | 31 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 10 | — | W 10 | W 9 | — | W 9 | WNW 7 | — | — | E 4 | — | — | WNW 4 | — | — |
| kJ | — | — | — | — | 8 | — | 8 | 6 | — | 2 | 5 | — | — | 1 | — | — | 1 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 4 | — | WNW 8 | NNE 3 | NNE 3 | WNW 8 | NNE 4 | NNE 4 | NW 3 | NE 4 | NE 4 | WNW 8 | NE 3 | — | — | WNW 4 |
| kJ | — | — | — | 32 | — | 68 | 6 | 3 | 73 | 16 | 10 | 4 | 24 | 6 | 73 | 2 | — | — | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 90 | 0 | 360 | 49 | 90 | 158 | 90 | 90 | 350 | 118 | 90 | 87 | 117 | 139 | 356 | 20 | 36 | 158 | 20 |
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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