Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 1 Aug 2026:
- Best quality surf: Monday 3 Aug, 2AM (local time) - 1.5ft (0.5m), 10s period, W swell with cross-offshore winds.
- Most powerful swell: Monday 3 Aug, 8PM (local time) - 3.5ft (1.1m), 8s period, W swell with 167 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 2AM (local time) - 1.5ft (0.5m), 10s 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 Monday (Aug 03) at 2AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.4m and 4s. 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 1.1m 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 5AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 3rd Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 2AM (Mon 3rd Aug) | 1.5ft (0.5m) 10s |
| 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
G’day, it’s Rusty.
Well, I gotta be straight with you. The next couple of weeks are looking pretty grim for a proper surf. We’ve got a long stretch of small, weak, and mostly wind-blown slop ahead. There are a couple of mornings that’ll get your heart going, but they’re few and far between.
The first real highlight is on the 9th of August, a Sunday morning. The swell bumps up to 5ft from the WSW, with a period of 8 seconds. The energy is moderate (237), but the magic is the wind – glassy, just a slight air. That’s the cleanest we’re gonna see it. Belle Ile - Les Donnants should be looking proper, with a clean face and offshore from the NNW early. It’s a river break, consistent, and exposed to the SW, so it’ll pick up that west swell. It’s a beginner-friendly wave, but with that size and glass, it’ll be fun for everyone. This is the standout, no doubt.
Then on the 12th of August, Wednesday morning, we get another taste. Swell is 4ft from the W, period of 9 seconds, and again, we’ve got glassy conditions with a NNE wind. Energy is moderate (210). It’s not as big as the 9th, but it’ll be clean and lined up for the dawn patrol. This is the second call.
Between the 1st and the 8th, it’s all small and messy. The swell is mostly under 3ft, with onshore winds and short, weak periods. Not worth paddling out for anything but a float. The energy is weak, often in the double digits. We’re talking about a week of flatness and dribble.
The second week is even more of a write-off. After that Wednesday the 12th, the swell drops back down and the wind goes onshore again. It’s just dead.
So, for the whole 16 days, you’ve got two real windows: Sunday the 9th and Wednesday the 12th. Both mornings, both glassy. Get on it if you can. The water temp is a touch warmer than usual, about 68°, so it’s not freezing.
This is Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 25°C on Sun afternoon, min 15°C on Sat morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Tue morning, min 16°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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 10 | W 9 | W 9 | W 8 | W 8 | W 10 | W 8 | W 8 | W 8 | W 8 | WSW 7 | WSW 7 | WSW 7 | W 7 | W 8 | W 8 | W 7 | W 7 | W 10 | W 9 | W 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 31 | 61 | 39 | 35 | 22 | 47 | 51 | 111 | 69 | 45 | 91 | 77 | 73 | 106 | 146 | 111 | 83 | 44 | 17 | 16 | 11 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross-off | cross-off | cross-on | cross-off | on | on | on | on | cross-on | on | on | on | cross-on | cross-on | on | cross-off | off | on | cross-off |
High Tide | 7:20PM4.15m | 7:38AM3.88m | 7:53PM4.10m | 8:12AM3.83m | 8:28PM4.00m | 8:49AM3.74m | 9:07PM3.83m | 9:32AM3.60m | 9:55PM3.62m | 10:25AM3.43m | 10:56PM3.39m | 11:36AM3.29m | 00:22AM3.23m | ||||||||
Low Tide | 1:18PM0.37m | 1:43AM0.33m | 1:53PM0.41m | 2:18AM0.39m | 2:29PM0.51m | 2:56AM0.51m | 3:10PM0.65m | 3:38AM0.68m | 3:58PM0.83m | 4:30AM0.88m | 4:58PM1.01m | 5:35AM1.06m | 6:13PM1.11m | ||||||||
 |  |  | | | | | | | | | | | | | | | | | | | |
 | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — |
 | — | — | 9:46 | — | — | 9:45 | — | — | 9:44 | — | — | 9:43 | — | — | 9:40 | — | — | 9:39 | — | — | 9:37 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 19 | 20 | 18 | 25 | 25 | 20 | 20 | 20 | 21 | 21 | 21 | 19 | 20 | 19 | 17 | 18 | 21 | 18 | 23 | 25 |
Feels °C | 14 | 17 | 15 | 13 | 20 | 21 | 18 | 17 | 16 | 21 | 21 | 20 | 17 | 18 | 17 | 16 | 15 | 17 | 14 | 19 | 21 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 9 | W 9 | W 8 | W 8 | W 10 | W 8 | W 8 | W 8 | W 8 | W 9 | W 8 | WSW 7 | — | W 8 | W 8 | W 7 | W 7 | WNW 6 | W 6 | W 6 |
| kJ | 31 | 61 | 39 | 35 | 22 | 47 | 51 | 51 | 69 | 45 | 15 | 33 | 73 | — | 146 | 111 | 83 | 44 | 13 | 6 | 11 |
Swell 2 Height (m) Direction Period (s) | NW 7 | NW 7 | WNW 5 | WNW 7 | ENE 3 | NW 4 | W 6 | — | NW 7 | W 9 | W 9 | — | — | — | — | — | W 11 | W 10 | W 10 | W 9 | W 9 |
| kJ | 13 | 23 | 9 | 4 | 2 | 5 | 1 | — | 2 | 27 | 15 | — | — | — | — | — | 9 | 17 | 17 | 16 | 7 |
Swell 3 Height (m) Direction Period (s) | WNW 7 | — | NW 7 | — | WSW 8 | WSW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | E 3 | — |
| kJ | 5 | — | 2 | — | 7 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Wind waves Height (m) Direction Period (s) | NNE 3 | — | NE 4 | ENE 4 | NW 6 | — | NW 6 | W 8 | WNW 4 | WSW 3 | WSW 7 | WSW 7 | — | W 7 | — | — | — | — | E 4 | — | WNW 3 |
| kJ | 4 | — | 20 | 13 | 2 | — | 6 | 111 | 13 | 2 | 91 | 77 | — | 106 | — | — | — | — | 7 | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 173 | 119 | 304 | 356 | 0 | 90 | 336 | 43 | 101 | 101 | 121 | 156 | 359 | 36 | 36 | 90 | 49 | 302 | 693 | 531 |
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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