Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 19 Jul 2026:
- Most powerful swell: Monday 27 Jul, 2AM (local time) - 4ft (1.2m), 6s period, NW swell with 86 kJ wave energy.
Best Forecast Surf Conditions for Belle Ile - Les Donnants this week:
The most powerful waves expected at Belle Ile - Les Donnants in the next 16 days are 1.2m 6s 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 1.3m 5s period and expected on Sunday (Jul 19) at 11PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Mon 27th Jul) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
The Lowdown
Alright folks, Rusty here with the imperial version. I’ve stared at the charts for Belle Ile - Les Donnants and I gotta be straight with you – this 16-day window is almost a total write-off. There’s no real surf to speak of, just tiny dribbles that barely qualify as rideable. The whole stretch from now through most of August is a desert of 1ft slop and onshore junk. The only flicker of hope comes on Wednesday morning July 29th and then again on Sunday August 2nd, but even then it’s vanishingly small.
The break itself is a river mouth that’s normally consistent and exposed to SW swell, but the forecasts show nothing but tiny WNW windswell – not what it wants. The water’s ridiculously warm, 72.7° on the 19th, a full 7.6° above normal for July – that’s very unusual and might feel like a bath.
Let’s run through it. From Sunday 19th through the rest of July, it’s a grim run. Waves never top 1ft, periods are short (mostly 6-10 seconds), and the wind is either cross-off or cross-shore – not awful, but the swell’s got no juice. The combined wave energy is pathetic, barely reaching double digits most days – think 12 to 24 (weak). Thursday 23rd morning has a brief offshore ENE breeze at 9 mph, but with only 1ft from NW at 6 seconds, it’s barely a ripple. This continues day after day – nothing but knee-high mush.
Then on Saturday 25th afternoon, the swell bumps to 4ft from WNW, but the period drops to 5 seconds and the wind is a strong onshore 25 mph. That’s just messy, blown-out chop. The energy jumps to 76 (still weak) but it’s not surfable. Sunday 26th and Monday 27th have similar onshore winds and messy 2-3ft swell. By Tuesday 28th the energy climbs to 124-136 (moderate) with a 2-3ft NW groundswell at 10 seconds, but the wind is cross-off or cross-on – still not
Short Range ForecastMostly dry. Warm (max 27°C on Tue afternoon, min 15°C on Mon morning). Winds decreasing (strong winds from the NE on Sun night, calm by Wed afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Thu night, min 19°C on Thu morning). Winds decreasing (fresh winds from the NE on Wed night, light winds from the ESE by Thu afternoon). | ||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | ||||||||||||||
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 12 | WNW 11 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | W 10 | W 9 | W 9 | NW 4 | W 9 | SE 5 | W 8 | W 8 | WSW 4 | W 5 |
Wave Graph  | |||||||||||||||||||
 kJ | 2 | 6 | 11 | 12 | 22 | 20 | 19 | 19 | 18 | 16 | 14 | 6 | 7 | 6 | 10 | 5 | 5 | 18 | 46 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | off | on | cross-off | off | on | cross-off | off | on | cross | on | on | cross-on |
High Tide | 9:21PM3.92m | 9:46AM3.53m | 10:06PM3.59m | 10:33AM3.31m | 10:56PM3.29m | 11:29AM3.12m | 00:00AM3.04m | 12:43PM3.01m | 1:25AM2.93m | 2:05PM3.03m | 2:44AM2.98m | 3:11PM3.16m | 3:41AM3.12m | ||||||
Low Tide | 3:42AM0.54m | 3:58PM0.74m | 4:29AM0.83m | 4:50PM1.01m | 5:21AM1.10m | 5:49PM1.23m | 6:20AM1.30m | 6:56PM1.36m | 7:26AM1.39m | 8:05PM1.36m | 8:31AM1.34m | 9:07PM1.24m | |||||||
 | | |  | | | | | | | | | | | | |  | | | |
 | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — |
 | 10:01 | — | — | 10:00 | — | — | 10:00 | — | — | 9:59 | — | — | 9:58 | — | — | 9:57 | — | — | 9:55 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 18 | 26 | 25 | 19 | 27 | 26 | 20 | 27 | 26 | 20 | 27 | 28 | 22 | 26 | 27 | 21 | 21 | 20 |
Feels °C | 15 | 10 | 21 | 16 | 11 | 23 | 18 | 15 | 22 | 20 | 16 | 24 | 23 | 17 | 22 | 23 | 20 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | NW 7 | W 9 | E 4 | WNW 11 | WNW 11 | E 4 | WNW 10 | WNW 10 | ESE 4 | WNW 4 | W 9 | ESE 4 | NW 4 | W 9 | SE 5 | SSE 4 | W 8 | — | W 8 |
| kJ | 2 | 6 | 5 | 12 | 22 | 3 | 19 | 19 | 3 | 3 | 14 | 3 | 7 | 6 | 10 | 2 | 5 | — | 1 |
Swell 2 Height (m) Direction Period (s) | W 7 | W 12 | W 12 | W 8 | NW 6 | NE 4 | — | NW 5 | WNW 10 | W 10 | NW 5 | W 9 | W 9 | NW 4 | W 8 | W 8 | W 10 | — | NW 8 |
| kJ | 1 | 3 | 11 | 1 | 1 | 3 | — | 1 | 18 | 16 | 1 | 6 | 6 | 1 | 6 | 5 | 2 | — | 3 |
Swell 3 Height (m) Direction Period (s) | W 10 | NW 7 | W 8 | W 8 | W 8 | WNW 10 | — | — | NNE 3 | — | NW 6 | NW 6 | — | — | NW 5 | — | — | — | W 10 |
| kJ | 2 | 2 | 1 | 1 | 1 | 20 | — | — | 1 | — | 2 | 1 | — | — | 1 | — | — | — | 2 |
Wind waves Height (m) Direction Period (s) | NE 5 | ENE 5 | NNE 4 | NE 5 | ENE 4 | — | NE 5 | ENE 4 | — | NE 4 | E 4 | — | ENE 2 | SE 3 | — | N 3 | ENE 3 | WSW 4 | W 5 |
| kJ | 82 | 74 | 2 | 71 | 50 | — | 49 | 24 | — | 13 | 14 | — | 1 | 6 | — | 2 | 1 | 18 | 46 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 347 | 347 | 356 | 347 | 377 | 369 | 346 | 377 | 436 | 377 | 139 | 356 | 356 | 380 | 622 | 454 | 695 | 685 | 43 |
Best forecast wave conditions in Morbihan - Brittany | |||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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