Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 23 Jul 2026:
- Best quality surf: Tuesday 28 Jul, 11AM (local time) - 2.5ft (0.7m), 9s period, WNW swell with offshore winds.
- Most powerful swell: Monday 27 Jul, 2AM (local time) - 4.5ft (1.4m), 9s period, WNW swell with 293 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 11AM (local time) - 2.5ft (0.7m), 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 Tuesday (Jul 28) at 11AM. The primary swell is predicted to be 0.7m and 9s 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 1.4m 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 1.0m 4s period and expected on Saturday (Jul 25) at 5AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Tue 28th Jul) | 2.5ft (0.7m) 9s |
| Best Surf | 11AM (Tue 28th Jul) | 2.5ft (0.7m) 9s |
| Most Powerful | 2AM (Mon 27th Jul) | 4.5ft (1.4m) 9s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for Belle Ile - Les Donnants. Gotta be straight with you – the first week is a tough watch. We’re looking at a solid run of poor surf conditions right through to the end of July. The wind is mostly onshore or cross-on, and the swell is tiny and weak. There’s a gap of about 8 days here where you’d be better off doing something else.
Things start to get a bit more interesting as we head into August. The first real glimmer of hope comes on the morning of Saturday the 1st of August. The wind is light and offshore from the ESE, so the surface will be clean. The swell is 5ft from the west with a period of 9 seconds, and the combined energy is in the moderate range at 372. It’s a bit of a wait, but that morning session looks like the standout of the whole outlook. The swell is a bit punchy for complete beginners, but for anyone who’s been hanging out, it’ll be a welcome change.
Then on Sunday the 2nd of August, the swell jumps up a notch. The morning sees 6ft from the WNW with a period of 10 seconds, and the energy is strong at 610. However, the wind is cross-on from the NW, so it won’t be as clean as Saturday. This one is really for the experienced crew only – over 5ft and pushing into expert territory. The afternoon gets messy with onshore wind again.
The rest of the second week looks like it fades back into small, windy, or poor conditions, with maybe a tiny window of clean surf on the morning of Friday the 7th of August, but the swell is only 1ft, so it’s barely a ripple.
So, to sum it up: the first week is a write-off. The best bet by a long shot is the morning of Saturday the 1st of August. It’s a clean, offshore morning with a proper waist-to-chest high swell. Don’t expect much else. The river mouth here can handle a bit of west swell, but the crowds are often here, so you might have some company for that Saturday morning session.
Stay stoked, and don’t force it when it’s not there.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Fri afternoon, min 18°C on Fri night). Winds increasing (calm on Fri afternoon, strong winds from the NW by Sat night). | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Wed afternoon, min 15°C on Mon morning). Winds decreasing (strong winds from the WNW on Sun night, calm by Wed afternoon). | ||||||||||||||||||
Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | ||||||||||||||
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 9 | W 9 | SE 5 | N 4 | NNW 4 | WNW 5 | NW 6 | WNW 6 | WNW 5 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 9 | NW 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 6 | 6 | 7 | 33 | 30 | 74 | 152 | 100 | 102 | 293 | 180 | 143 | 161 | 78 | 73 | 45 | 41 | 42 | 43 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-on | cross-off | cross | on | cross-on | on | on | cross-on | cross | on | cross-off | off | on | cross-on | off | cross-on | cross-off |
High Tide | 1:25AM2.93m | 2:05PM3.03m | 2:44AM2.98m | 3:11PM3.16m | 3:41AM3.12m | 4:00PM3.35m | 4:24AM3.30m | 4:40PM3.56m | 5:00AM3.47m | 5:14PM3.76m | 5:33AM3.63m | 5:47PM3.93m | |||||||
Low Tide | 7:26AM1.39m | 8:05PM1.36m | 8:31AM1.34m | 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 | |||||||
 |  | |  | | |  | | | | | | | | | | | | | |
 | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — |
 | 9:58 | — | — | 9:57 | — | — | 9:55 | — | — | 9:54 | — | — | 9:52 | — | — | 9:52 | — | — | 9:51 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 20 | 27 | 26 | 21 | 22 | 21 | 19 | 19 | 19 | 16 | 19 | 23 | 20 | 27 | 27 | 25 | 29 | 30 |
Feels °C | 20 | 16 | 23 | 20 | 17 | 16 | 12 | 17 | 16 | 13 | 16 | 16 | 20 | 15 | 24 | 23 | 23 | 25 | 26 |
Swell 1 Height (m) Direction Period (s) | NW 4 | W 9 | SE 5 | W 8 | W 8 | — | W 10 | W 10 | WNW 11 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 9 | NW 6 |
| kJ | 4 | 6 | 7 | 5 | 5 | — | 2 | 8 | 12 | 28 | 180 | 143 | 161 | 78 | 73 | 45 | 41 | 42 | 36 |
Swell 2 Height (m) Direction Period (s) | W 9 | NW 5 | W 8 | — | W 10 | — | — | — | — | — | — | — | WNW 5 | — | E 3 | W 12 | W 11 | W 11 | WNW 9 |
| kJ | 6 | 1 | 6 | — | 2 | — | — | — | — | — | — | — | 13 | — | 1 | 3 | 9 | 9 | 43 |
Swell 3 Height (m) Direction Period (s) | W 5 | — | — | W 12 | W 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 10 |
| kJ | 1 | — | — | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 20 |
Wind waves Height (m) Direction Period (s) | NE 3 | E 4 | — | N 4 | NNW 4 | WNW 5 | NW 6 | WNW 6 | WNW 5 | WNW 9 | — | — | NE 2 | E 4 | — | NW 2 | — | WNW 2 | NNE 3 |
| kJ | 4 | 9 | — | 33 | 30 | 74 | 152 | 100 | 102 | 293 | — | — | 1 | 6 | — | 1 | — | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 377 | 574 | 453 | 452 | 575 | 453 | 144 | 435 | 158 | 43 | 20 | 336 | 28 | 0 | 101 | 49 | 0 | 90 | 28 |
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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