Surf Forecasts:
Belle Ile surf forecast from 13 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 11PM (local time) - 4.5ft (1.3m), 10s period, WNW swell with 349 kJ wave energy.
Best Forecast Surf Conditions for Belle Ile this week:
The most powerful waves expected at Belle Ile in the next 16 days are 1.3m 10s and forecast to arrive on Thursday (Aug 13) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Monday (Aug 17) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Thu 13th Aug) | 4.5ft (1.3m) 10s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s coming our way.
Right now, it’s looking pretty bleak for the next week and a half. We’re in a real flat spell. There’s a solid 11-day stretch where you’d be wasting your time paddling out – the conditions are just too poor. The surf quality is consistently rated as poor, with a mix of onshore winds and weak energy.
The first real glimmer of hope doesn’t show up until Monday, 24 August. That morning at Belle Ile, we’ve got a bit of life. Swell is 4 ft from the W, with a period of 8 seconds, and the combined energy is moderate at 181. What’s interesting here is the wind – it’s a light cross-offshore breeze from the SE, which should keep the surface clean. It’s not going to be epic, but it’s the first surfable window we’ve had in ages. Just keep in mind the swell direction is from the W, and this spot really prefers a SW swell, so it might be a little wobbly.
The following afternoon, Monday afternoon, sees a bit more size at 5 ft from the WNW, with clean cross-offshore winds from the SSE. The energy picks up to 244. Still, it’s not the ideal direction for the break, and the period is only 8 seconds, so don’t expect any real grunt. It’s a beginner-friendly break that’s fairly consistent, but you might have some company as crowds are sometimes an issue here.
If you’re after a standout, honestly, this whole window is pretty ordinary. The best of a bad bunch is that Monday morning session – clean, rideable, and you’ll get a few. But don’t get your hopes up for anything special. The water temp is about average for the time of year, nothing unusual there.
After Monday, it gets messy again with strong winds and lumpy conditions, so that Monday window is your only real chance in the next 16 days. Keep an eye on it, but don’t book the day off work just yet.
- Rusty
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 29°C on Thu night, min 18°C on Fri night). Winds decreasing (strong winds from the WNW on Fri night, light winds from the WNW by Sat afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Sat night, min 16°C on Tue morning). Winds decreasing (fresh winds from the NNE on Sun night, calm by Tue morning). | ||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 10 | W 11 | W 10 | W 9 | WNW 9 | W 9 | WNW 8 | W 8 | NW 8 | WNW 8 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | NW 5 | W 8 | WNW 7 | W 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 146 | 188 | 220 | 194 | 142 | 248 | 99 | 153 | 134 | 210 | 88 | 70 | 73 | 17 | 41 | 45 | 30 | 65 | 21 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross | cross-on | on | cross | cross | on | cross-off | cross | on | cross-off | cross | on | cross-off | glassy | on | cross-on |
High Tide | 5:53AM4.20m | 6:10PM4.59m | 6:34AM4.26m | 6:49PM4.60m | 7:11AM4.23m | 7:27PM4.47m | 7:47AM4.10m | 8:03PM4.24m | 8:21AM3.91m | 8:37PM3.92m | 8:55AM3.67m | 9:12PM3.58m | |||||||
Low Tide | 11:36PM-0.06m | 11:50AM0.01m | 00:20AM-0.18m | 12:33PM-0.07m | 1:01AM-0.16m | 1:14PM-0.03m | 1:41AM-0.02m | 1:55PM0.13m | 2:20AM0.22m | 2:35PM0.38m | 2:59AM0.54m | 3:17PM0.69m | 3:40AM0.88m | ||||||
 | | |  | | |  |  |  | | | |  | | | | | | | |
 | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — |
 | 9:30 | — | — | 9:29 | — | — | 9:27 | — | — | 9:24 | — | — | 9:22 | — | — | 9:22 | — | — | 9:20 |
mm | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 25 | 28 | 29 | 20 | 25 | 26 | 18 | 22 | 25 | 18 | 22 | 25 | 18 | 20 | 24 | 17 | 19 | 20 |
Feels °C | 25 | 23 | 24 | 24 | 19 | 20 | 20 | 16 | 20 | 23 | 15 | 17 | 20 | 15 | 16 | 20 | 18 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | W 11 | W 10 | W 9 | — | W 9 | WNW 8 | W 8 | NW 8 | WNW 8 | — | WNW 7 | WNW 7 | W 11 | WNW 9 | W 8 | — | W 6 |
| kJ | 146 | 188 | 220 | 194 | 142 | — | 99 | 153 | 22 | 210 | 88 | — | 73 | 17 | 2 | 15 | 30 | — | 21 |
Swell 2 Height (m) Direction Period (s) | — | WNW 12 | — | — | — | — | — | — | — | — | — | — | — | W 7 | NW 8 | W 10 | — | — | — |
| kJ | — | 29 | — | — | — | — | — | — | — | — | — | — | — | 4 | 2 | 2 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 3 | WNW 3 | NW 5 | NW 4 | WNW 9 | NW 6 | — | W 8 | NNE 4 | NNE 3 | WNW 7 | NNE 4 | NE 3 | WNW 7 | NW 5 | WNW 4 | WNW 7 | WNW 4 |
| kJ | 6 | 2 | 6 | 31 | 7 | 248 | 50 | — | 134 | 7 | 4 | 70 | 19 | 1 | 41 | 45 | 9 | 65 | 9 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 29 | 36 | 158 | 33 | 29 | 158 | 31 | 29 | 87 | 36 | 33 | 158 | 125 | 429 | 436 | 148 | 90 | 371 | 90 |
Best forecast wave conditions in Morbihan - Brittany | |||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Belle Ile Surf forecast
The above surf forecast table for Belle Ile 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 can be found by selecting the local surf guide option on the grey menu. Our Belle Ile 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) 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 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 is 48 km (30 miles) from the city of Ploemeur. If you plan a holiday in Morbihan - Brittany, look for hotels and other accommodation in Ploemeur. Ploemeur has rooms for a wide range of budgets as well as car hire and transport links.
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