
Surf Forecasts:
Belle Ile - Les Donnants surf forecast from 12 Jul 2026:
- Most powerful swell: Wednesday 15 Jul, 8PM (local time) - 6ft (1.8m), 6s period, WNW swell with 193 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 1.8m 6s and forecast to arrive on Wednesday (Jul 15) 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 1.0m 4s period and expected on Sunday (Jul 19) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Wed 15th Jul) | 6ft (1.8m) 6s |
Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.
Alright, let’s get into it. The first real surf window here is a long way off, so be patient. The next 16 days are mostly a write-off for Belle Ile - Les Donnants, with a real dry spell running from July 12th right through until July 20th. There’s a few tiny pulses but they’re all buried under poor conditions; nothing worth paddling for. The combined energy is weak, barely cracking 30 or 40 (32–38) most days, and the wind is just never on our side.
The first faint glimmer comes on the morning of July 21st. Tuesday morning, the sky looks sketchy with a risk of t-storms, but the wind goes glassy, dead calm, out of the NNE at 3 mph. That’s a rare clean window. The swell is tiny, just 2 ft from the W with a period of 10 seconds, and the combined energy is only 51 – weak. It’s surfable but very ordinary. Still, if you’re desperate for a paddle, that glassy morning is the only clean chance in the first week and a half.
After that, we get walloped by onshores again until July 23rd. Thursday the 23rd sees a spike in size – morning pushes 5 ft from the W (period 6 sec, energy 191), and by the afternoon it’s a thumping 8 ft from the W (period 9 sec, energy 1279). That’s a lot of power, but the wind is onshore and strong, 19 mph from the WSW, so it’ll be a messy, blown-out mess. This is definitely expert-only territory size-wise, and with the wind on it, honestly, it looks more interesting for kite surfing than paddle surfing. The water temp is running 71°F, which is a full 6°F warmer than normal – very unusual for this time of year, so at least you won’t need a thick suit.
The best bet in the whole 16-day window is the morning of July 27th. Monday the 27th, it’s clear skies, a light offshore breeze from the NE at 9 mph, making for clean conditions. Swell is 4 ft from the W with a period of 9 seconds, and combined energy hits 225 – that’s moderate, solid enough. The score is marginal, but it’s the only morning that has a legit offshore wind with some body to the swell. It’s still inconsistent, and the break is a river mouth, so don’t expect a perfect A-frame, but if you want the pick of a very lean run, that’s your window. Crowds are likely here – it’s often busy, so get there early.
Overall, a tough outlook. The water is warmer than you’d expect, but the surf just isn’t cooperating. Hang tight for that Monday morning on the 27th.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Sun night. Warm (max 35°C on Sun afternoon, min 20°C on Tue morning). Winds decreasing (fresh winds from the ENE on Sun morning, light winds from the WNW by Tue afternoon). | Days 4-6 Weather SummarySome drizzle, heaviest during Fri afternoon. Warm (max 23°C on Wed afternoon, min 19°C on Wed night). Winds decreasing (strong winds from the WNW on Wed afternoon, light winds from the WNW by Fri night). | ||||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||
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 9 | WNW 9 | WSW 3 | SW 5 | SW 6 | WSW 6 | WSW 6 | W 11 | W 10 | W 10 | W 5 | NW 5 | WSW 7 | WSW 7 | WSW 6 | WSW 6 | WSW 6 | W 7 | W 6 | W 6 | W 5 |
Wave Graph | |||||||||||||||||||||
26 | 26 | 12 | 6 | 18 | 34 | 12 | 21 | 33 | 31 | 141 | 47 | 42 | 62 | 34 | 13 | 12 | 22 | 27 | 25 | 19 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | on | off | cross-on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | glassy | on | cross-off |
High Tide | 3:47PM3.89m | 4:20AM3.89m | 4:44PM4.16m | 5:15AM4.06m | 5:35PM4.39m | 6:05AM4.17m | 6:23PM4.52m | 6:52AM4.18m | 7:10PM4.54m | 7:36AM4.11m | 7:54PM4.43m | 8:20AM3.96m | 8:38PM4.21m | ||||||||
Low Tide | 9:27AM0.63m | 10:00PM0.42m | 10:24AM0.42m | 10:56PM0.17m | 11:16AM0.23m | 11:49PM-0.02m | 12:06PM0.09m | 00:38AM-0.11m | 12:53PM0.04m | 1:25AM-0.09m | 1:39PM0.09m | 2:11AM0.04m | 2:24PM0.24m | 2:56AM0.26m | |||||||
6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | |
— | — | 10:07 | — | — | 10:07 | — | — | 10:06 | — | — | 10:05 | — | — | 10:05 | — | — | 10:04 | — | — | 10:02 | |
mm | — | — | 1 | — | 1 | — | — | — | 1 | — | — | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 27 | 35 | 35 | 23 | 24 | 23 | 20 | 23 | 24 | 22 | 23 | 22 | 20 | 20 | 21 | 21 | 21 | 21 | 20 | 20 | 21 |
Feels °C | 22 | 33 | 31 | 20 | 22 | 23 | 21 | 22 | 19 | 18 | 18 | 16 | 17 | 18 | 19 | 21 | 20 | 20 | 22 | 21 | 20 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | ENE 4 | SW 5 | SW 6 | W 13 | WSW 6 | SW 5 | W 10 | W 10 | — | WSW 5 | WSW 7 | W 8 | WSW 6 | WSW 6 | WSW 6 | W 7 | W 6 | W 8 | W 5 |
26 | 26 | 2 | 6 | 18 | 3 | 12 | 7 | 33 | 31 | — | 11 | 42 | 12 | 34 | 12 | 12 | 22 | 27 | 6 | 19 | |
Swell 2 Height (m) Direction Period (s) | W 9 | SE 4 | SSE 4 | NW 4 | E 4 | W 8 | W 12 | W 11 | WSW 6 | WSW 6 | — | WSW 9 | W 8 | W 10 | W 9 | W 8 | W 8 | W 8 | — | — | W 8 |
6 | 4 | 4 | 4 | 2 | 1 | 11 | 21 | 4 | 4 | — | 26 | 22 | 2 | 14 | 13 | 12 | 12 | — | — | 11 | |
Swell 3 Height (m) Direction Period (s) | — | W 8 | NNE 3 | SW 6 | NW 8 | W 8 | W 8 | W 8 | W 7 | NNE 3 | — | W 11 | — | — | — | — | W 6 | SW 6 | — | — | — |
— | 1 | 2 | 6 | 2 | 1 | 1 | 1 | 1 | 1 | — | 2 | — | — | — | — | 3 | 5 | — | — | — | |
Wind waves Height (m) Direction Period (s) | E 4 | ENE 3 | WSW 3 | ENE 4 | — | WSW 6 | — | WSW 5 | NW 4 | WNW 4 | W 5 | NW 5 | NW 4 | WSW 7 | — | — | — | WNW 2 | — | W 6 | NNE 4 |
27 | 4 | 12 | 8 | — | 34 | — | 5 | 7 | 5 | 141 | 47 | 7 | 62 | — | — | — | 1 | — | 25 | 34 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 139 | 125 | 135 | 119 | 374 | 90 | 155 | 356 | 345 | 343 | 407 | 90 | 341 | 341 | 90 | 617 | 341 | 139 | 717 | 737 | |
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.










