Surf Forecasts:
Belle Ile surf forecast from 31 Aug 2026:
- Best quality surf: Saturday 5 Sep, 11AM (local time) - 4.5ft (1.3m), 13s period, WNW swell with offshore winds.
- Most powerful swell: Monday 31 Aug, 8PM (local time) - 6.5ft (2.0m), 10s period, W swell with 792 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 5AM (local time) - 5ft (1.6m), 10s period with W swell.
Best Forecast Surf Conditions for Belle Ile this week:
The surf forecast for Belle Ile over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 01) at 5AM. The primary swell is predicted to be 1.6m and 10s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Belle Ile in the next 16 days are 2.0m 10s and forecast to arrive on Monday (Aug 31) 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 (Sep 06) at 8AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 1st Sep) | 5ft (1.6m) 10s |
| Best Surf | 11AM (Sat 5th Sep) | 4.5ft (1.3m) 13s |
| Most Powerful | 8PM (Mon 31st Aug) | 6.5ft (2.0m) 10s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Alright, this is Rusty.
Gotta be straight with you—there’s not a lot to get excited about for Belle-Ile over the next 16 days. We have a long dry spell right off the bat. For the first few days, there’s pretty much nothing worth paddling out for. The first sniff of anything surfable doesn’t come until Tuesday morning, September 1st, and even then it’s small, clean but underwhelming.
For most of the first week, we’re looking at a mix of onshore winds and weak swell. The water temp is running about 67°, which is pretty normal for this time of year, so no surprises there.
The real standout, the one you want to circle on the calendar, is Saturday morning, September 5th. Belle Ile is an exposed south-west facing break, and we get a nice pulse of groundswell from the WNW at 4ft with a 13-second period. That long-period groundswell brings real energy (530) and better shaped waves, but with the period that long, it’s better suited to a point or reef. Belle Ile is a beach setup, so the waves might set up a bit straight, but the wind is offshore from the ENE at 15 mph. That’s clean, offshore conditions. This is the best session of the whole outlook—if you can only go once, make it this one. Crowds can be a thing here sometimes, but with this quality, expect a few out.
A week and a half later, Tuesday morning, September 15th, is another promising session. We’ve got a WNW groundswell at 6ft with an 11-second period (759 energy), and the wind is glassy—light NE at 3 mph. That’s going to be clean, smooth, and the swell size is manageable for most. This one’s a bit further out, so keep an eye on it, but it looks like it could be the second best day of the window.
Everything else in between is pretty ordinary. There is a small window on the 6th with offshore wind, but the swell is tiny. On September 10th, there’s a big pulse of energy (1718) with swell hitting 8ft, but the wind is messy and cross-onshore. That size with a short 9-second period and onshore wind is going to be a washing machine. Honestly, for most of the second week, the swell direction is all over the place and the wind isn’t playing ball. It’s a quiet stretch.
For now, aim for the 5th of September morning and keep an eye on the 15th of September morning.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Wed night, min 15°C on Tue morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Sat night, min 16°C on Sat morning). Wind will be generally light. | |||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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 10 | WNW 10 | W 9 | W 9 | W 8 | W 8 | WNW 7 | W 8 | W 8 | WNW 8 | WNW 9 | W 9 | WNW 11 | WNW 13 | WNW 12 | WNW 11 | WNW 10 | WNW 10 | WSW 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 951 | 573 | 315 | 165 | 76 | 48 | 33 | 57 | 121 | 98 | 109 | 126 | 151 | 366 | 530 | 459 | 263 | 146 | 64 | 77 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | cross-off | on | cross | glassy | on | on | on | on | cross-on | cross-on | on | cross | off | cross-on | cross-off | off | cross-off | cross-on |
High Tide | 7:26PM4.29m | 7:44AM4.09m | 8:01PM4.13m | 8:21AM3.94m | 8:41PM3.88m | 9:03AM3.71m | 9:30PM3.56m | 9:58AM3.44m | 10:37PM3.24m | 11:18AM3.21m | 00:24AM3.05m | 1:15PM3.22m | 2:15AM3.19m | |||||||
Low Tide | 1:47AM0.19m | 2:02PM0.30m | 2:25AM0.39m | 2:44PM0.51m | 3:09AM0.65m | 3:34PM0.77m | 4:03AM0.96m | 4:39PM1.03m | 5:14AM1.21m | 6:02PM1.18m | 6:41AM1.29m | 7:33PM1.10m | ||||||||
 |  |  | | | | |  | | | | | | | | | | |  | | |
 | — | — | 7:31 | — | — | 7:31 | — | — | 7:33 | — | — | 7:35 | — | — | 7:35 | — | — | 7:37 | — | — |
 | 8:55 | — | — | 8:53 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 18 | 18 | 16 | 17 | 17 | 16 | 18 | 19 | 19 | 19 | 19 | 19 | 20 | 22 | 17 | 21 | 23 | 22 | 24 | 27 |
Feels °C | 14 | 15 | 16 | 15 | 14 | 15 | 16 | 18 | 19 | 18 | 18 | 18 | 19 | 20 | 15 | 21 | 21 | 16 | 22 | 27 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | WNW 10 | W 9 | W 9 | W 8 | W 8 | WNW 7 | W 8 | W 8 | WNW 8 | WNW 9 | W 9 | WNW 11 | WNW 13 | WNW 12 | WNW 11 | WNW 10 | WNW 10 | NW 9 |
| kJ | 951 | 573 | 315 | 165 | 76 | 48 | 33 | 57 | 121 | 98 | 109 | 126 | 151 | 366 | 530 | 459 | 263 | 146 | 64 | 21 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | W 9 | — | — | — | — | NW 8 | WNW 9 | — | W 14 | WNW 16 | — | — | W 10 | — | W 9 | SSE 4 |
| kJ | — | — | — | — | 56 | — | — | — | — | 3 | 30 | — | 4 | 80 | — | — | 50 | — | 25 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — | — | — | W 9 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 45 | — | — | — | — | 25 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NW 4 | — | — | — | — | — | — | — | W 2 | WNW 4 | — | — | ENE 3 | E 4 | ESE 4 | WSW 9 |
| kJ | — | — | — | — | 9 | — | — | — | — | — | — | — | 1 | 11 | — | — | 5 | 28 | 13 | 77 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 93 | 29 | 0 | 101 | 29 | 119 | 436 | 101 | 90 | 375 | 44 | 44 | 148 | 29 | 0 | 74 | 29 | 0 | 0 | 29 |
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)
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 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 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.
Nearest