Surf Forecasts:
Belle Ile surf forecast from 21 Aug 2026:
- Best quality surf: Saturday 22 Aug, 2PM (local time) - 1.5ft (0.5m), 10s period, W swell with offshore winds.
- Most powerful swell: Wednesday 26 Aug, 5PM (local time) - 7ft (2.2m), 9s period, WSW swell with 767 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 2PM (local time) - 1.5ft (0.5m), 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 Saturday (Aug 22) at 2PM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.5m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Belle Ile in the next 16 days are 2.2m 9s and forecast to arrive on Wednesday (Aug 26) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Monday (Aug 24) at 8AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 22nd Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 2PM (Sat 22nd Aug) | 1.5ft (0.5m) 10s |
| Most Powerful | 5PM (Wed 26th Aug) | 7ft (2.2m) 9s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
G'day, Rusty here. Well, I've got to be straight with you—this is one of those outlooks where you might want to leave the board in the car and grab a coffee instead. The 16-day window for Belle Ile is looking pretty grim, with no standout sessions at all. Every single forecast period is tagged as poor surf conditions, so there's nothing to get excited about right now.
Let's break it down. The water temperature is sitting at 68°F, which is about normal for this time of year, so no wetsuit drama there. But the swell story is a dud. We start with a weak, onshore mess on Friday, August 21st: a 5ft WNW swell with a 10-second period, but it's got a cross-on 12 mph wind, and the combined energy is only 341. That's moderate energy, but it's all blown out. By Saturday morning, the swell drops to 2ft from the W with an 8-second period and a combined energy of just 91—weak. The wind is cross-off at 12 mph, but the waves are tiny. Saturday afternoon gives us a glassy 2ft W swell with a 10-second period, but the energy is only 66. It's clean, but you'd be lucky to catch anything.
The next week is a slow grind. Sunday, August 23rd, has a 1.0ft swell with fresh offshore wind, but the combined energy is a pathetic 17. That's nothing. We get a few days of offshore winds and clean conditions with tiny waves—1.0ft to 1ft—but the energy never breaks 100. It's all weak. By Wednesday, August 26th, a 6ft SW swell with a short 7-second period rolls in, but the cross-on wind is 22 mph, making it lumpy and unrideable. The combined energy jumps to 285, but the quality is zero. Thursday and Friday see bigger swells—7ft and 8ft from the WSW—but the wind is howling at 22 to 34 mph, and the energy climbs to 770 and 614. That's strong energy, but it's blown out and messy. For experienced surfers, the size might be there, but the wind is a killer. It's more of a kite-surfing day than a paddle session.
The second week doesn't improve. From Saturday, August 29th, through to Saturday, September 5th, the swell stays small—1.0ft to 6ft—with mostly cross-on winds and combined energy ranging from 13 to 454. The best chance might be Tuesday, September 1st, with a 4ft W swell and 8-second period, but the cross-on wind is 9 mph, and the energy is just 199. It's still poor. Thursday, September 3rd, has a 3ft W swell and a cross-shore wind, but at 99 energy, it's not worth paddling out.
Honestly, there's no highlight here. Belle Ile is a fairly consistent spot, but this forecast is a rare blank run. The swell direction is predominantly from the W and WSW, which is close to the optimum SW direction, but the wind and lack of quality kill it. Hang tight—forecasts can change, but for now, it's a miss.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Sun night, min 14°C on Sat morning). Winds increasing (calm on Sat afternoon, strong winds from the ENE by Sun morning). | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Tue night. Warm (max 23°C on Mon afternoon, min 17°C on Mon morning). Mainly strong winds. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | WNW 10 | WNW 10 | WNW 9 | W 8 | W 10 | W 9 | W 9 | W 10 | WSW 10 | WSW 10 | WSW 9 | SW 9 | WSW 8 | SW 8 | SW 7 | SW 7 | WSW 9 | WSW 8 | WSW 9 | WSW 8 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 341 | 351 | 199 | 49 | 45 | 25 | 13 | 17 | 58 | 36 | 33 | 20 | 28 | 17 | 127 | 269 | 767 | 219 | 482 | 670 | 691 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross-off | glassy | cross-off | off | cross-off | cross-off | off | off | cross-on | off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 11:18AM2.91m | 00:19AM2.73m | 1:22PM2.84m | 2:25AM2.79m | 2:53PM3.02m | 3:27AM3.01m | 3:44PM3.28m | 4:08AM3.25m | 4:21PM3.56m | 4:40AM3.50m | 4:52PM3.83m | 5:10AM3.73m | 5:22PM4.06m | ||||||||
Low Tide | 6:12PM1.53m | 6:45AM1.61m | 7:35PM1.54m | 8:05AM1.53m | 8:48PM1.37m | 9:08AM1.31m | 9:41PM1.11m | 9:56AM1.03m | 10:24PM0.82m | 10:35AM0.75m | 11:00PM0.55m | 11:11AM0.50m | 11:34PM0.32m | ||||||||
 |  |  | |  |  | | |  | |  |  | | |  |  | |  | | | | |
 | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:24 | — | — |
 | — | — | 9:15 | — | — | 9:13 | — | — | 9:10 | — | — | 9:08 | — | — | 9:07 | — | — | 9:05 | — | — | 9:02 |
mm | — | — | — | — | — | — | — | — | — | — | 3 | 2 | — | — | 5 | 1 | — | 2 | 3 | 2 | 4 |
Temp °C | 17 | 18 | 18 | 15 | 20 | 20 | 17 | 25 | 27 | 19 | 23 | 22 | 21 | 21 | 21 | 20 | 20 | 20 | 18 | 19 | 19 |
Feels °C | 14 | 14 | 12 | 12 | 18 | 13 | 10 | 21 | 21 | 11 | 22 | 22 | 22 | 21 | 20 | 15 | 16 | 17 | 12 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 9 | WNW 7 | W 10 | W 9 | W 9 | W 10 | WSW 10 | WSW 10 | SE 5 | SW 9 | S 4 | SW 8 | WNW 10 | WNW 9 | WSW 9 | WSW 8 | WSW 9 | — | SSW 10 |
| kJ | 341 | 351 | 199 | 34 | 45 | 25 | 13 | 17 | 58 | 36 | 20 | 20 | 13 | 17 | 19 | 16 | 767 | 219 | 482 | — | 67 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 8 | WNW 7 | NW 7 | WNW 7 | WSW 12 | NW 7 | — | ENE 4 | W 9 | WSW 8 | WNW 11 | SSE 5 | — | WNW 9 | WNW 8 | — | — | — |
| kJ | — | — | — | 49 | 21 | 14 | 4 | 15 | 2 | — | 15 | 2 | 28 | 11 | 4 | — | 16 | 24 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 10 | — | — | — | NW 6 | — | W 9 | WSW 9 | W 13 | WNW 11 | W 8 | — | — | — | — | — | — | — |
| kJ | — | — | — | 8 | — | — | — | 2 | — | 2 | 33 | 3 | 12 | 1 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NNE 3 | NE 3 | — | NE 4 | E 5 | E 4 | ENE 4 | E 5 | — | SSE 4 | — | S 4 | SW 7 | SW 7 | — | — | — | WSW 8 | WSW 8 |
| kJ | — | — | 4 | 1 | — | 30 | 52 | 12 | 45 | 104 | — | 7 | — | 9 | 127 | 269 | — | — | — | 670 | 691 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 36 | 339 | 36 | 21 | 0 | 101 | 344 | 101 | 302 | 336 | 1 | 156 | 1 | 21 | 117 | 177 | 347 | 118 | 121 | 148 | 417 |
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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