Surf Forecasts:
Belle Ile surf forecast from 28 Aug 2026:
- Best quality surf: Friday 4 Sep, 2PM (local time) - 3.5ft (1.0m), 13s period, WNW swell with glassy winds.
- Most powerful swell: Saturday 29 Aug, 8PM (local time) - 8ft (2.5m), 9s period, W swell with 1,145 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 11AM (local time) - 2.5ft (0.8m), 14s period with WNW 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 Friday (Sep 04) at 11AM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 1.0m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Belle Ile in the next 16 days are 2.5m 9s and forecast to arrive on Saturday (Aug 29) 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 0.5m 3s period and expected on Tuesday (Sep 01) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Fri 4th Sep) | 2.5ft (0.8m) 14s |
| Best Surf | 2PM (Fri 4th Sep) | 3.5ft (1.0m) 13s |
| Most Powerful | 8PM (Sat 29th Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s be honest, looking at the next 16 days for Belle Ile, it’s a tough stretch. We’ve got a long, quiet gap right at the start. From Friday the 28th of August all the way through to Thursday the 3rd of September, the wind is just howling and the swell is either too messy, too small, or blown to bits. That’s a solid week of poor conditions. The water temp is sitting at 67°, which is about normal for this time of year, so at least you won’t freeze waiting for something to happen.
Friday morning the 4th of September is where it finally gets interesting. We’ve got a tiny 3ft swell from the WNW, but the period is a very long 14 seconds – that’s proper groundswell energy. The real story here is the glassy conditions with a light NW breeze. That’s a major positive. The combined energy is moderate (404), but for a break like Belle Ile that’s exposed to SW, this WNW groundswell is a bit off-angle. It’ll be clean, but the sets might be few and far between. This is a sneaky window for a dawn paddle.
Then on Saturday morning the 5th of September, we get a similar setup. The swell drops a touch to 4ft, but the period is still a solid 12 seconds from the WNW. The wind is a light NNE cross-offshore, which will keep the surface clean. Combined energy is moderate (374). This is another small window, but it’s the best of the bunch. Again, the direction isn’t perfect for the spot, but if you’re after a glassy, long-period wave, grab it.
After that, it’s back to the doldrums. From Sunday the 6th onward, the swell drops right off and the wind turns cross-onshore or onshore again. The energy levels fall into the weak category (110 and below), and the periods are short. There’s a weird spike on the 12th of September with a 17-second period, but the swell is tiny (2ft) and the wind is a fresh onshore breeze from the WSW. Not worth the paddle.
So, the short version: the whole first week is a write-off. The best bet is the morning of Friday the 4th and Saturday the 5th of September. It’s not a pumping swell, but the glassy or clean conditions will make it fun on a longboard. Don’t hold your breath for anything else.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Sat morning. Warm (max 20°C on Sat morning, min 18°C on Fri morning). Winds increasing (light winds from the SSW on Fri night, strong winds from the WSW by Sat morning). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Mon morning, min 16°C on Tue morning). Winds decreasing (fresh winds from the W on Mon morning, light winds from the WNW by Wed morning). | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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 8 | W 10 | SW 7 | WSW 8 | WSW 8 | WNW 10 | W 9 | WSW 8 | W 9 | W 10 | W 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 63 | 125 | 246 | 980 | 954 | 710 | 348 | 509 | 955 | 876 | 792 | 586 | 322 | 169 | 77 | 68 | 50 | 32 | 81 | 185 | 180 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | on | on | cross-on | cross-on | on | on | on | cross | cross | on | cross | on | on | on | cross-on | on | on |
High Tide | 5:52PM4.24m | 6:09AM4.06m | 6:22PM4.34m | 6:39AM4.15m | 6:53PM4.36m | 7:10AM4.16m | 7:26PM4.29m | 7:44AM4.09m | 8:01PM4.13m | 8:21AM3.94m | 8:41PM3.88m | 9:03AM3.71m | 9:30PM3.56m | ||||||||
Low Tide | 11:44AM0.30m | 00:07AM0.16m | 12:17PM0.18m | 00:39AM0.08m | 12:50PM0.13m | 1:12AM0.09m | 1:25PM0.17m | 1:47AM0.19m | 2:02PM0.30m | 2:25AM0.39m | 2:44PM0.51m | 3:09AM0.65m | 3:34PM0.77m | 4:03AM0.96m | |||||||
 |  |  | | |  |  |  |  | | |  | | | | | | | | | | |
 | 7:24 | — | — | 7:26 | — | — | 7:28 | — | — | 7:28 | — | — | 7:31 | — | — | 7:31 | — | — | 7:33 | — | — |
 | — | — | 9:01 | — | — | 9:00 | — | 8:58 | — | — | 8:55 | — | — | 8:53 | — | — | 8:52 | — | — | 8:50 | — |
mm | 1 | — | — | 6 | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 19 | 19 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 16 | 18 | 19 | 16 | 18 | 18 | 18 | 18 | 19 |
Feels °C | 17 | 16 | 18 | 13 | 14 | 14 | 15 | 14 | 13 | 16 | 15 | 15 | 15 | 14 | 14 | 15 | 16 | 16 | 17 | 16 | 18 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 10 | WNW 9 | — | — | WNW 10 | W 9 | — | — | W 10 | W 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 |
| kJ | 63 | 125 | 31 | — | — | 710 | 348 | — | — | 876 | 792 | 586 | 322 | 169 | 77 | 68 | 50 | 32 | 81 | 185 | 180 |
Swell 2 Height (m) Direction Period (s) | SW 7 | WNW 9 | W 11 | — | — | SW 8 | — | — | — | — | — | — | — | — | WNW 5 | ENE 3 | — | — | — | — | W 18 |
| kJ | 26 | 8 | 39 | — | — | 179 | — | — | — | — | — | — | — | — | 14 | 1 | — | — | — | — | 6 |
Swell 3 Height (m) Direction Period (s) | NW 10 | — | WSW 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 23 | — | 41 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | SW 7 | SW 7 | WSW 8 | WSW 8 | — | SW 7 | WSW 8 | W 9 | W 10 | — | NNE 3 | NE 3 | — | NE 3 | — | — | — | — | — | — |
| kJ | 20 | 77 | 246 | 980 | 954 | — | 91 | 509 | 955 | 646 | — | 5 | 2 | — | 2 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 90 | 101 | 45 | 406 | 434 | 44 | 101 | 259 | 259 | 202 | 93 | 29 | 29 | 158 | 33 | 90 | 158 | 101 | 101 | 101 | 44 |
Best forecast wave conditions in Morbihan - Brittany | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
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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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