Surf Forecasts:
Belle Ile surf forecast from 29 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 2AM (local time) - 5ft (1.6m), 10s period, W swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 8AM (local time) - 8ft (2.5m), 10s period, W swell with 1,153 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 2AM (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 2AM. 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 2.5m 10s and forecast to arrive on Monday (Aug 31) at 8AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Tuesday (Sep 01) at 5AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 1st Sep) | 5ft (1.6m) 10s |
| Best Surf | 2AM (Tue 1st Sep) | 5ft (1.6m) 10s |
| Most Powerful | 8AM (Mon 31st Aug) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. Let’s break down what’s coming for Belle Ile over the next couple of weeks. I gotta be straight: the start is a total washout. We’ve got a long stretch of poor conditions, so leave the board in the car for a bit. Lots of onshore wind from the west and southwest, and the swell is all messy with short periods around 8 to 10 seconds. The first real hope doesn’t show up until Tuesday the 1st of September, and even then it’s just a small window.
Tuesday the 1st of September morning, the wind finally goes light offshore from the northeast (3 mph), cleaning up a 1.3m swell from the west with moderate energy (306). That’s your first chance for a clean session, but it’s only a morning thing. The afternoon swings back onshore and it’s junk again.
We get another gap of a few days of onshore slop and tiny waves. Friday the 4th of September morning offers a 1.6m west-northwest swell with a much longer 12-second period (730) – that’s real groundswell. The wind is light but still a bit cross-onshore, so it’s only marginal. Not a total standout, but if you’re keen, it’s a look.
Now the real standout is Saturday the 5th of September. Morning brings a clean offshore easterly at 12 mph, tidying up a 1.3m west-northwest swell (409). The afternoon? Glassy. Absolutely no wind, and the swell hangs at 1.2m. That’s the kind of day you live for. Water temp sits around 67°, which is about average for this time of year, nothing weird.
After that, it’s back into a few days of westerly wind and lumpy conditions until we hit another potential gem in the second week. Friday the 11th of September is the big one. Morning has a clean offshore breeze from the east (12 mph) with a tiny 0.9m swell, but that swell is packing a ridiculous 15-second period (558) – that’s proper, long-period groundswell, best on a point or a reef. The afternoon though… that’s the prize. Glassy, a solid 2.0m swell from the west with a 14-second period, and strong wave energy (1857). This is for experienced surfers only – that size and length will have some serious punch. Remember, that long period can make a beach break close out, but if there’s a bank or a channel, it could be unreal.
Saturday the 12th of September morning still offers a clean 1.5m west swell (572) with offshore wind, but it gets more crossed up later.
So overall, the first week is mostly a bust, but we’ve got two real standouts: Saturday the 5th of September for clean, fun-size waves, and Friday the 11th of September afternoon for the powerful, serious stuff. Wind and swell finally connect. Don’t expect much consistency, but the good days could be very good.
Stay stoked.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun morning. Warm (max 20°C on Sat afternoon, min 15°C on Tue morning). Winds decreasing (strong winds from the WSW on Sat afternoon, light winds from the NE by Tue morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Thu morning, min 16°C on Tue afternoon). Wind will be generally light. | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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) | WSW 8 | W 9 | W 9 | WSW 8 | W 9 | W 10 | W 10 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | WNW 7 | WNW 8 | WNW 8 | WNW 15 | WNW 12 | WNW 12 | WNW 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1057 | 484 | 332 | 481 | 912 | 1019 | 786 | 480 | 306 | 162 | 74 | 48 | 33 | 57 | 147 | 167 | 284 | 730 | 579 | 431 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | on | on | on | cross-off | cross-off | on | cross | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross |
High Tide | 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 | 9:58AM3.44m | 10:37PM3.24m | |||||||
Low Tide | 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 | 4:39PM1.03m | ||||||||
 |  |  |  | | | |  |  | | | | | | | | | | | | |
 | — | — | 7:28 | — | — | 7:28 | — | — | 7:31 | — | — | 7:31 | — | — | 7:33 | — | — | 7:35 | — | — |
 | — | 9:00 | — | 8:58 | — | — | 8:55 | — | — | 8:53 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — |
mm | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 19 | 20 | 19 | 19 | 19 | 18 | 18 | 16 | 17 | 18 | 17 | 18 | 18 | 19 | 19 | 19 | 16 | 17 | 17 |
Feels °C | 14 | 15 | 16 | 14 | 13 | 16 | 16 | 15 | 15 | 15 | 15 | 17 | 17 | 17 | 17 | 18 | 17 | 15 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | — | W 9 | W 9 | — | — | W 10 | W 10 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | WNW 7 | WNW 8 | WNW 8 | WNW 8 | WNW 12 | WNW 12 | WNW 11 |
| kJ | — | 484 | 332 | — | — | 1019 | 786 | 480 | 306 | 162 | 74 | 48 | 33 | 57 | 147 | 167 | 167 | 730 | 579 | 431 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 9 | — | — | WNW 15 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 23 | — | — | 284 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 8 | SW 8 | SW 7 | WSW 8 | W 9 | — | — | — | — | — | NW 3 | NNE 2 | — | — | — | — | — | — | — | — |
| kJ | 1057 | 284 | 134 | 481 | 912 | — | — | — | — | — | 4 | 1 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 435 | 45 | 156 | 367 | 426 | 93 | 90 | 0 | 0 | 90 | 22 | 119 | 101 | 101 | 101 | 87 | 33 | 36 | 148 | 21 |
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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