Surf Forecasts:
Belle Ile surf forecast from 25 Aug 2026:
- Best quality surf: Sunday 30 Aug, 5AM (local time) - 6ft (1.9m), 8s period, WSW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 8PM (local time) - 10ft (3.0m), 9s period, W swell with 1,192 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 11AM (local time) - 2.5ft (0.8m), 6s period with SW 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 Wednesday (Aug 26) at 11AM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.8m and 6s. 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 3.0m 9s and forecast to arrive on Friday (Aug 28) 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 0.4m 3s period and expected on Wednesday (Aug 26) at 5PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Wed 26th Aug) | 2.5ft (0.8m) 6s |
| Best Surf | 5AM (Sun 30th Aug) | 6ft (1.9m) 8s |
| Most Powerful | 8PM (Fri 28th Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s happening at Belle Ile.
The next couple of weeks are a real mixed bag, and honestly, for most of it, you’re going to be battling the wind. Conditions are rough for quite a stretch, but there is one standout window worth waiting for, especially for those with some experience.
Starting off now, Tuesday the 25th, it’s flat and messy. Tiny swell with some cross-on wind. Not worth paddling out. Wednesday the 26th looks a bit cleaner with a light cross-off breeze, but the waves are small, around 2ft to 3ft from the WNW and SW. It’s surfable but very ordinary.
Then we hit a real sour patch. From Thursday the 27th right through to Saturday the 5th of September, the wind is just relentless. Most of this period is blown out with onshore or cross-onshore winds that are moderate to strong. The swell picks up a bit, with some days like Friday the 29th seeing 8ft from the WSW, but it’s accompanied by a nasty 25 mph cross-on wind. That’s not surf – it’s a washing machine. Even the bigger stuff around Monday the 1st of September is messy. This is a long stretch of poor conditions with very little chance of a clean wave. For several days, it looks more interesting for kite surfing than paddle surfing.
Finally, Sunday the 6th of September morning brings a glimmer of hope. A gentle breeze from the NE gives us a clean, glassy morning. The swell is 4ft from the WNW with a period of 10 seconds. Combined wave energy is moderate at 367. It’s a bit of a wait, but this is the first window of clean surf in over a week.
The real highlight? That’s Tuesday the 8th of September. We’ve got a massive 15ft swell from the W with a very long period of 15 seconds. That’s serious groundswell energy. Combined energy is extremely strong at 10683. However, the forecast says it’s too big for Belle Ile. For a beginner spot, this is well over the 8ft mark, meaning experts only. That long period also means it’s going to breaking fast and straight on a beach setup, so you’d want to be very experienced. The wind is light and conditions are favorable, but this is a double-edged sword.
Following that, Wednesday the 9th of September morning looks excellent. We have a 7ft swell from the W with an 8-second period, clean conditions with a light offshore from the NNE, and good energy of 900. This is the best on offer for the whole outlook. The swell direction is right on the money for optimum, and glassy offshore wind means clean, lined-up waves. Just know that with good conditions and a consistent spot, crowds are possible here.
So, to sum it up: don’t bother for the first week and a half; the wind will wreck everything. If you’re a beginner, the morning of Sunday the 6th of September and Wednesday the 9th of September morning are your best shots. For the experts, the Tuesday 8th of September holds a huge swell but it’s a beast. The standout is the morning of Wednesday the 9th of September.
Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Wed night. Warm (max 20°C on Tue afternoon, min 18°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Fri morning. Very mild (max 19°C on Fri morning, min 17°C on Fri afternoon). Winds increasing (calm on Sat night, strong winds from the W by Sun night). | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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) | SW 8 | WNW 11 | WNW 10 | SW 6 | W 9 | SW 6 | WSW 7 | WSW 8 | WSW 8 | WSW 6 | W 8 | W 8 | WSW 7 | WSW 8 | WSW 8 | WNW 10 | WNW 10 | W 7 | W 8 | W 9 | W 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 33 | 22 | 38 | 46 | 39 | 26 | 113 | 173 | 147 | 187 | 1020 | 569 | 557 | 636 | 429 | 218 | 210 | 309 | 454 | 381 | 422 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-off | off | cross-on | cross-on | cross | on | on | on | on | cross-on | cross-on | on | cross | cross-on | on | cross-on | on | on |
High Tide | 4:21PM3.56m | 4:40AM3.50m | 4:52PM3.83m | 5:10AM3.73m | 5:22PM4.06m | 5:39AM3.92m | 5:52PM4.24m | 6:09AM4.06m | 6:22PM4.34m | 6:39AM4.15m | 6:53PM4.36m | 7:10AM4.16m | 7:26PM4.29m | ||||||||
Low Tide | 9:56AM1.03m | 10:24PM0.82m | 10:35AM0.75m | 11:00PM0.55m | 11:11AM0.50m | 11:34PM0.32m | 11:44AM0.30m | 00:07AM0.16m | 12:17PM0.18m | 00:39AM0.08m | 12:50PM0.13m | 1:12AM0.09m | 1:25PM0.17m | 1:47AM0.19m | |||||||
 |  |  | |  |  | |  | | | |  |  | |  |  | | | | | | |
 | 7:20 | — | — | 7:22 | — | — | 7:24 | — | — | 7:24 | — | — | 7:26 | — | — | 7:28 | — | — | 7:28 | — | — |
 | — | — | 9:07 | — | — | 9:05 | — | — | 9:02 | — | — | 9:01 | — | — | 9:00 | — | 8:58 | — | — | 8:55 | — |
mm | — | — | — | — | 4 | 8 | — | 1 | 3 | 3 | 3 | — | 1 | 1 | 1 | — | 1 | 1 | — | — | — |
Temp °C | 19 | 20 | 20 | 19 | 19 | 20 | 19 | 19 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 17 | 18 | 18 |
Feels °C | 19 | 19 | 19 | 19 | 17 | 19 | 16 | 19 | 19 | 17 | 14 | 14 | 15 | 14 | 16 | 21 | 19 | 14 | 10 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 4 | SW 6 | SW 6 | WNW 8 | WSW 7 | WSW 8 | WSW 8 | WNW 10 | — | — | — | — | — | WSW 7 | WNW 10 | W 12 | W 8 | W 9 | W 10 |
| kJ | 33 | 16 | 8 | 43 | 25 | 21 | 113 | 173 | 147 | 33 | — | — | — | — | — | 169 | 210 | 3 | 454 | 381 | 422 |
Swell 2 Height (m) Direction Period (s) | WNW 11 | WNW 11 | WNW 10 | WNW 9 | W 9 | SSE 4 | WNW 8 | WNW 8 | WNW 10 | W 12 | — | — | — | — | — | WNW 10 | — | — | — | W 13 | — |
| kJ | 13 | 22 | 38 | 46 | 39 | 2 | 20 | 21 | 20 | 12 | — | — | — | — | — | 218 | — | — | — | 3 | — |
Swell 3 Height (m) Direction Period (s) | W 8 | W 8 | SW 7 | — | W 8 | — | W 12 | W 11 | NW 10 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 1 | 2 | — | 1 | — | 3 | 2 | 26 | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 5 | SW 4 | S 4 | — | SE 3 | SW 6 | SSW 5 | — | — | WSW 6 | W 8 | W 8 | WSW 7 | WSW 8 | WSW 8 | — | SW 7 | W 7 | — | — | — |
| kJ | 7 | 11 | 1 | — | 2 | 26 | 9 | — | — | 187 | 1020 | 569 | 557 | 636 | 429 | — | 106 | 309 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 101 | 101 | 101 | 0 | 0 | 21 | 101 | 101 | 101 | 135 | 158 | 119 | 359 | 148 | 101 | 101 | 430 | 426 | 158 | 118 | 36 |
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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