Surf Forecasts:
Belle Ile surf forecast from 17 Aug 2026:
- Best quality surf: Saturday 22 Aug, 2AM (local time) - 3.5ft (1.0m), 9s period, WNW swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 11PM (local time) - 5ft (1.5m), 10s period, WNW swell with 391 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 2AM (local time) - 3.5ft (1.0m), 9s 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 (Aug 22) at 2AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.5m and 9s. 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 1.5m 10s and forecast to arrive on Thursday (Aug 20) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Monday (Aug 24) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 22nd Aug) | 3.5ft (1.0m) 9s |
| Best Surf | 2AM (Sat 22nd Aug) | 3.5ft (1.0m) 9s |
| Most Powerful | 11PM (Thu 20th Aug) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Alright, surfers. Rusty here, checking in on Belle Ile.
To be straight with you, looking at the whole 16-day window, it's a rough stretch for paddle surfing. There are very few moments where it all comes together, so we've got to pick our spots carefully. The water temp is sitting about 69°, which is a touch warmer than normal for this time of year, but that's the only real gift.
We kick off from August 17th through the 25th, and it’s frankly a flat spell. We're looking at minimal swell – ankle to knee-high at best – and almost constant onshore or cross-onshore winds. The swell energy is embarrassingly low, so don't even bother suiting up. There's a solid 8-day gap with zero recommendations for any kind of decent surf.
Things finally wake up on August 26, Wednesday morning. The swell bumps up a bit, bringing 3ft from the WNW with a period of 10 seconds. It's not big, but we get a clean, offshore wind from the ENE at 6 mph. The wave energy is moderate at 114. This is the first window where you might get a few little fun ones on a longboard, but the conditions are still just 'ordinary'.
The standout, the one to mark on your calendar, comes in on August 27, Thursday morning. We get a new 7ft swell from the WSW. The period is a short 8 seconds, so it'll be a bit sectiony, but the wind is a light NNE breeze at 6 mph, making it cross-offshore and clean. The wave energy is strong at 470. The crowd situation can be "sometimes" an issue here, so you might not have it all to yourself, but this morning is the best trade-off of size and clean conditions we get.
After that, the winds turn ugly again. The swell gets huge – up to 10ft to 12ft on the 28th and 29th – but it's accompanied by strong onshore winds making it a messy, wind-blown mess. That combined energy hits over 2600, which is very strong, but with those winds, it's a no-go for a paddle board. Honestly, that setup looks far more interesting for the kite surfers.
The very end of the window, on September 1, Tuesday, has dropped back to a still-clean 5ft, but the fresh cross-onshore winds will keep it lumpy.
It’s a tough forecast, mates. The 27th morning is your best bet, and even then, it’s not perfect. A long stretch of nothing before that, and confused, windy leftovers after.
Stay tuned, forecasts can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon afternoon, min 17°C on Mon night). Winds decreasing (strong winds from the WNW on Mon night, light winds from the WNW by Wed morning). | Days 5-7 Weather SummarySome drizzle, heaviest during Fri morning. Warm (max 21°C on Sat night, min 16°C on Fri morning). Mainly strong winds. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 4 | NW 5 | WNW 7 | WNW 6 | WNW 8 | W 8 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | W 9 | W 10 | W 9 | W 9 | W 9 | W 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 21 | 33 | 27 | 24 | 20 | 28 | 107 | 103 | 288 | 363 | 351 | 289 | 258 | 144 | 71 | 64 | 40 | 24 | 14 | 5 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | on | cross-on | cross | cross-on | on | on | cross-on | cross-on | on | glassy | off | glassy | cross-off | cross-off | off | off |
High Tide | 8:37PM3.92m | 8:55AM3.67m | 9:12PM3.58m | 9:30AM3.40m | 9:51PM3.24m | 10:13AM3.14m | 10:42PM2.93m | 11:18AM2.91m | 00:19AM2.73m | 1:22PM2.84m | 2:25AM2.79m | 2:53PM3.02m | 3:27AM3.01m | |||||||
Low Tide | 2:35PM0.38m | 2:59AM0.54m | 3:17PM0.69m | 3:40AM0.88m | 4:04PM1.03m | 4:28AM1.21m | 4:59PM1.33m | 5:28AM1.48m | 6:12PM1.53m | 6:45AM1.61m | 7:35PM1.54m | 8:05AM1.53m | 8:48PM1.37m | |||||||
 |  | | |  |  | | | | | |  | | | |  | | | |  | |
 | — | — | 7:11 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — |
 | — | 9:22 | — | — | 9:20 | — | — | 9:17 | — | — | 9:15 | — | — | 9:15 | — | — | 9:13 | — | — | 9:10 |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | 6 |
Temp °C | 22 | 22 | 18 | 19 | 20 | 18 | 20 | 21 | 19 | 19 | 18 | 16 | 18 | 18 | 17 | 18 | 21 | 18 | 19 | 19 |
Feels °C | 18 | 16 | 17 | 17 | 18 | 17 | 18 | 18 | 15 | 15 | 13 | 14 | 14 | 14 | 15 | 18 | 15 | 11 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 8 | W 9 | W 8 | WNW 8 | W 8 | WNW 10 | WNW 10 | W 9 | W 9 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | W 9 | W 10 | W 9 | W 9 | W 9 | W 8 |
| kJ | 10 | 22 | 6 | 12 | 20 | 28 | 107 | 103 | 15 | 14 | 351 | 289 | 258 | 144 | 71 | 64 | 40 | 24 | 14 | 5 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NW 6 | NW 6 | W 7 | — | W 12 | W 9 | — | — | — | W 9 | WNW 8 | NW 8 | NW 7 | WNW 7 | NW 6 | W 10 |
| kJ | — | — | — | — | 1 | 11 | 4 | — | 11 | 27 | — | — | — | 36 | 43 | 28 | 13 | 5 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | WNW 10 | W 9 | — | — | — | — | — | — | W 8 | — | — | — | — | — | NW 7 |
| kJ | — | — | — | — | — | 10 | 2 | — | — | — | — | — | — | 21 | — | — | — | — | — | 2 |
Wind waves Height (m) Direction Period (s) | WNW 4 | NW 5 | WNW 7 | WNW 6 | WNW 5 | — | — | WNW 5 | WNW 10 | WNW 10 | — | — | — | — | — | — | NE 3 | ENE 4 | E 5 | E 5 |
| kJ | 21 | 33 | 27 | 24 | 15 | — | — | 72 | 288 | 363 | — | — | — | — | — | — | 2 | 37 | 51 | 111 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 435 | 90 | 90 | 436 | 90 | 90 | 101 | 44 | 144 | 202 | 36 | 36 | 158 | 0 | 0 | 0 | 136 | 258 | 433 | 347 |
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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