Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 6 Aug 2026:
- Best quality surf: Monday 10 Aug, 8AM (local time) - 1.5ft (0.4m), 9s period, WNW swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 8AM (local time) - 3.5ft (1.0m), 9s period, W swell with 166 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 8AM (local time) - 1.5ft (0.4m), 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 Monday (Aug 10) at 8AM. The primary swell is predicted to be 0.4m and 9s period with a secondary swell of 0.5m and 4s. Another secondary swell of 0.6m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Belle Ile - Les Donnants in the next 16 days are 1.0m 9s and forecast to arrive on Thursday (Aug 13) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Aug 08) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Mon 10th Aug) | 1.5ft (0.4m) 9s |
| Best Surf | 8AM (Mon 10th Aug) | 1.5ft (0.4m) 9s |
| Most Powerful | 8AM (Thu 13th Aug) | 3.5ft (1.0m) 9s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
The Lowdown
Alright, Rusty here again, this time in feet and knots.
Right now, it’s a bleak outlook for Belle Ile - Les Donnants. The first week and a half is flat and messy – think tiny, onshore-churned slop. From Thursday 6 August through Monday 11 August, it’s all poor surf conditions with waves under 2 ft, mostly onshore wind. Not worth suiting up.
Wednesday morning 12 August brings a tiny glimmer: a clean, cross-offshore breeze and 2 ft of W swell with an 11-second period – a touch of groundswell. Combined wave energy is weak (94). Barely surfable on a log. Thursday morning 13 August is better: glassy flat calm, 3 ft of W swell (9 seconds), and moderate energy at 138. That’s your best early look, but still small.
From there, it’s back to onshore slop through Wednesday 20 August. Waves stay 2 ft to 3 ft, wind is onshore or cross-onshore, and quality is poor.
The real standout is Friday morning 21 August – over two weeks out, so keep an eye on it. Forecast shows 5 ft of WNW swell with a 9-second period. Wind is a light cross-offshore from the NNE, so clean faces. Combined energy hits 394 – moderate-to-strong, a proper bump. The swell direction (WNW) aligns well with the break’s optimum SW, so shape should be there. Water temp is 68°F, a touch warmer than average for August. Crowds are ‘often’ an issue, so expect a lineup.
That 5 ft will be too much for beginners. But for everyone else, Friday morning 21 August is the only real highlight in this 16-day window. Afternoon goes onshore again, so dawn patrol is the move.
Flat for ages, then one good morning on the 21st. Rusty out.
Short Range ForecastMostly dry. Warm (max 25°C on Sat afternoon, min 15°C on Thu morning). Winds decreasing (fresh winds from the NE on Thu night, calm by Fri afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Tue night, min 18°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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) | WNW 7 | WNW 7 | WNW 6 | W 10 | W 9 | W 9 | W 9 | WNW 11 | WNW 10 | WNW 9 | NW 9 | WNW 5 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | W 11 | W 10 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 48 | 45 | 30 | 16 | 15 | 7 | 7 | 11 | 38 | 33 | 21 | 33 | 31 | 30 | 26 | 26 | 26 | 22 | 79 | 123 | 139 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross-off | cross-off | cross-on | cross-off | off | cross-on | on | cross-on | on | cross-off | cross | on | cross-off | cross-off | on | cross-off | cross-off | on | cross-off |
High Tide | 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 | 5:10AM4.04m | 5:27PM4.44m | ||||||||
Low Tide | 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 | 11:05AM0.20m | 11:36PM-0.06m | ||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — |
 | — | — | 9:39 | — | — | 9:37 | — | — | 9:37 | — | — | 9:35 | — | — | 9:32 | — | — | 9:31 | — | — | 9:30 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 18 | 19 | 16 | 23 | 23 | 19 | 25 | 23 | 19 | 20 | 20 | 19 | 22 | 25 | 20 | 25 | 28 | 23 | 26 | 28 |
Feels °C | 14 | 13 | 14 | 12 | 20 | 18 | 14 | 21 | 19 | 17 | 18 | 19 | 18 | 19 | 22 | 18 | 23 | 26 | 22 | 24 | 26 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | W 10 | WNW 6 | W 10 | W 9 | W 9 | W 9 | ESE 3 | WNW 10 | WNW 9 | NW 9 | WNW 5 | WNW 9 | WNW 9 | WNW 5 | WNW 8 | WNW 8 | WNW 8 | W 11 | W 10 | W 9 |
| kJ | 48 | 17 | 30 | 16 | 15 | 7 | 7 | 2 | 38 | 33 | 21 | 31 | 31 | 30 | 15 | 26 | 26 | 22 | 79 | 123 | 139 |
Swell 2 Height (m) Direction Period (s) | W 10 | — | W 10 | NW 6 | WNW 6 | WNW 4 | NW 6 | WNW 11 | W 7 | WSW 6 | W 9 | WNW 9 | WSW 7 | WSW 7 | WNW 8 | WSW 6 | WSW 6 | W 12 | NW 7 | W 6 | WNW 5 |
| kJ | 18 | — | 17 | 8 | 3 | 2 | 1 | 11 | 4 | 4 | 2 | 33 | 9 | 9 | 26 | 4 | 4 | 11 | 14 | 1 | 14 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | E 3 | NW 6 | W 7 | W 9 | — | W 9 | W 9 | WSW 6 | — | — | WSW 7 | WNW 10 | W 10 | W 9 | SW 6 | — | — |
| kJ | — | — | — | — | 1 | 1 | 1 | 6 | — | 1 | 1 | 14 | — | — | 9 | 10 | 8 | 7 | 1 | — | — |
Wind waves Height (m) Direction Period (s) | — | WNW 7 | NE 4 | ENE 4 | N 3 | NE 4 | E 4 | — | NW 3 | W 4 | W 4 | — | NW 4 | W 7 | NE 3 | NE 3 | — | — | — | — | — |
| kJ | — | 45 | 15 | 9 | 1 | 28 | 22 | — | 1 | 9 | 9 | — | 5 | 23 | 3 | 2 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 49 | 436 | 148 | 277 | 727 | 455 | 176 | 121 | 90 | 90 | 350 | 30 | 90 | 436 | 90 | 90 | 436 | 90 | 0 | 90 | 20 |
Best forecast wave conditions in Morbihan - Brittany | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Belle Ile - Les Donnants surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest