
Surf Forecasts:
Belle Ile surf forecast from 3 Sep 2026:
- Best quality surf: Saturday 5 Sep, 11AM (local time) - 4.5ft (1.4m), 12s period, WNW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 5PM (local time) - 6ft (1.8m), 12s period, W swell with 918 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 11AM (local time) - 4.5ft (1.4m), 12s 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 Saturday (Sep 05) at 11AM. The primary swell is predicted to be 1.4m and 12s 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 1.8m 12s and forecast to arrive on Monday (Sep 07) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Sunday (Sep 06) at 8AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Sat 5th Sep) | 4.5ft (1.4m) 12s |
| Best Surf | 11AM (Sat 5th Sep) | 4.5ft (1.4m) 12s |
| Most Powerful | 5PM (Mon 7th Sep) | 6ft (1.8m) 12s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what Belle Ile has in store for us over the next couple of weeks.
The first part of the outlook is a write-off, I’m afraid. We’ve got a bit of a wait on our hands. Thursday the 3rd and Friday the 4th are a total no-go with onshore winds and weak, messy swell. The water is a touch warmer than usual for this time of year, sitting at 67.3°F.
Things finally start looking up on Saturday the 5th. That’s where the window opens. The morning brings a clean, cross-offshore breeze from the ENE at 9 mph and a solid, long-period groundswell from the WNW. Swell height is 4.6ft with a period of 12 seconds, and the combined energy is strong at (505). This is a proper groundswell, so it’ll have better shape and more push, but it might wall up a bit at the beach. That afternoon it goes glassy – zero wind, some clouds – with the swell easing a touch to 4.3ft but still packing a punch (467). That’s a day you’ll want to be in the water.
Sunday morning the 6th is still rideable with an offshore breeze from the E at 16 mph, but the swell drops to 3.0ft (146). It’s clean, but just ordinary. The rest of the session gets blown out by the afternoon.
The next real standout is Wednesday the 9th. The morning is clean again with a light cross-offshore breeze from the SE at just 3 mph. The swell is 3.3ft from the WNW with a 9-second period (204). It’s not going to be huge, but it’ll be tidy and fun.
Then we get a couple of nice windows. Saturday the 12th afternoon goes glassy with an SSW breeze at 3 mph, and the swell bumps up to 3.9ft from the WNW with an 11-second period (385). That’s a good call. Sunday the 13th morning is also glassy, with an ENE breeze at 3 mph, and the swell is 3.9ft with a very long 13-second period (440). That long period will make the waves reel with more energy, but it might be a bit too straight for the beach – still, a clean, empty lineup is a beautiful thing.
After that, the surf gets smaller and wind becomes a problem again. There’s a chance on the 16th Wednesday morning with a clean offshore breeze from the ENE at 9 mph and 3.3ft swell (222), but it’s nothing special. The rest of the second week is mostly small, weak, and blown out, with the combined energy dropping below 100 towards the end.
If you’re picking the best of the lot, I’d say Saturday the 5th is the one. The long-period WNW groundswell with glassy conditions in the afternoon is a proper session. The Sunday morning on the 13th is a close second for that glassy, clean, long-period goodness, just a bit smaller. Stay patient, the wait is worth it.
Short Range ForecastMostly dry. Warm (max 24°C on Sat night, min 15°C on Sat morning). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Sun afternoon, min 14°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 8 | W 9 | W 9 | WNW 9 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 10 | W 9 | W 13 | W 12 | W 11 | WNW 10 | WNW 9 | WNW 8 | WNW 9 | WNW 9 | WNW 9 |
Wave Graph | ||||||||||||||||||||
117 | 131 | 151 | 151 | 268 | 505 | 467 | 285 | 146 | 98 | 39 | 690 | 918 | 807 | 598 | 451 | 268 | 154 | 116 | 70 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | cross | cross-off | glassy | off | off | cross-on | on | on | on | cross-on | cross-on | on | cross | cross-off | cross-on | cross-on |
High Tide | 9:30PM3.56m | 9:58AM3.44m | 10:37PM3.24m | 11:18AM3.21m | 00:24AM3.05m | 1:15PM3.22m | 2:15AM3.19m | 2:44PM3.51m | 3:24AM3.49m | 3:44PM3.88m | 4:15AM3.81m | 4:31PM4.21m | 4:57AM4.06m | |||||||
Low Tide | 3:34PM0.77m | 4:03AM0.96m | 4:39PM1.03m | 5:14AM1.21m | 6:02PM1.18m | 6:41AM1.29m | 7:33PM1.10m | 8:05AM1.12m | 8:49PM0.81m | 9:11AM0.80m | 9:47PM0.46m | 10:04AM0.46m | 10:35PM0.15m | |||||||
— | — | 7:35 | — | — | 7:35 | — | — | 7:37 | — | — | 7:37 | — | — | 7:39 | — | — | 7:41 | — | — | |
8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:42 | — | — | 8:39 | — | — | 8:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 19 | 19 | 20 | 20 | 15 | 21 | 24 | 20 | 23 | 20 | 18 | 18 | 17 | 18 | 18 | 17 | 14 | 16 | 19 |
Feels °C | 18 | 19 | 18 | 19 | 18 | 12 | 20 | 21 | 15 | 20 | 18 | 16 | 16 | 12 | 14 | 14 | 10 | 13 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 9 | W 9 | WNW 9 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 10 | W 9 | W 13 | W 12 | W 11 | WNW 10 | — | W 9 | WNW 9 | WNW 9 | WNW 9 |
117 | 131 | 151 | 151 | 268 | 505 | 467 | 285 | 146 | 98 | 39 | 690 | 918 | 807 | 598 | — | 15 | 154 | 116 | 70 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | WNW 15 | — | — | — | NE 5 | SE 4 | NW 9 | — | — | — | — | — | WSW 9 | W 8 | W 8 | W 14 |
— | — | — | — | 42 | — | — | — | 1 | 9 | 21 | — | — | — | — | — | 17 | 50 | 13 | 4 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 9 | W 17 | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 26 | 23 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ENE 3 | — | E 3 | ESE 4 | — | WNW 4 | W 9 | — | — | — | WNW 9 | WNW 8 | — | W 8 | WSW 8 |
— | — | — | — | — | 1 | — | 7 | 20 | — | 16 | 97 | — | — | — | 451 | 268 | — | 48 | 62 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 101 | 101 | 134 | 155 | 31 | 0 | 0 | 31 | 0 | 101 | 87 | 90 | 90 | 36 | 158 | 158 | 29 | 0 | 121 | 253 |
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.










