Surf Forecasts:
Belle Ile surf forecast from 11 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 8AM (local time) - 1.5ft (0.5m), 11s period, W swell with glassy winds.
- Most powerful swell: Friday 14 Aug, 8PM (local time) - 5ft (1.5m), 9s period, WNW swell with 329 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 8AM (local time) - 1.5ft (0.5m), 11s 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 Wednesday (Aug 12) at 8AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.3m and 8s. 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 9s and forecast to arrive on Friday (Aug 14) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Sunday (Aug 16) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Wed 12th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 8AM (Wed 12th Aug) | 1.5ft (0.5m) 11s |
| Most Powerful | 8PM (Fri 14th Aug) | 5ft (1.5m) 9s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Alright, Rusty here with the Belle Ile outlook. Let me say it plain: the next week or so is flat.
From the 11th into the 12th, the swell is barely a ripple—0.4 feet to 0.7 feet from the W-NW with short periods around 8 to 10 seconds. Tuesday morning had clean conditions with an offshore breeze, but there's just no push. Through the 13th, a 1.0-foot swell shows up but it’s wrecked by a 15 mph onshore wind. The combined energy of all swells is weak, sitting between 18 and 227 for days.
We’ve got a huge dry spell. From the 11th right through the early part of the 21st, every session scores zero. There are a few clean mornings with offshore or cross-off winds, like the 16th and 20th, but the swell stays under 1.0 feet. Nothing ridable.
Finally, on Friday the 21st, we get a 0.9-foot WNW swell with a 10-second period, combined energy at 166, and a gentle cross-off wind keeping it clean. It’s labeled “surfable but very ordinary.” A small step forward. Saturday the 22nd is a big jump—8 feet from the WNW. The combined energy goes up to 993 to 1689, which is strong, but the wind is cross-on or onshore, making it a wild mess. That’s more for the kite surfers than paddle boarders. Only experts should be out there.
The real gem is Sunday the 23rd, morning. We get a 5-foot WNW groundswell with a 10-second period, combined energy at 598 (moderate), and a light cross-off breeze from the NE. Conditions are clean and the rating says “very good.” This is the best of the 16 days. The swell direction matches Belle Ile’s exposure well, and with that glassy wind, it’ll be peeling nicely. It can get a crowd here sometimes, so be early.
After that, Monday the 24th has a clean offshore breeze but the swell drops to 2 feet with a long 14-second period. The energy is there, but the long period might make it fat on the beach break. Tuesday the 25th is similar—clean, but small.
So the message is: wait it out. The 23rd morning is your window. Water temp is nothing unusual for the season. Stick with it, and I’ll catch you in the lineup. Rusty out.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 19°C on Thu night). Winds increasing (calm on Tue night, fresh winds from the N by Thu night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri night. Warm (max 27°C on Fri night, min 17°C on Sat morning). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 8 | WNW 8 | W 12 | W 10 | W 10 | W 10 | W 10 | W 11 | WNW 10 | WNW 9 | W 9 | W 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | NW 6 | WNW 7 | WNW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 26 | 26 | 25 | 100 | 121 | 146 | 154 | 224 | 307 | 144 | 165 | 73 | 99 | 96 | 83 | 66 | 72 | 73 | 10 | 40 | 23 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | on | cross | on | on | cross-on | cross-on | on | cross | cross | on | cross | cross-off | on | cross-off | cross-off | on | cross | cross-off | off | cross-off |
High Tide | 4:40PM4.17m | 5:10AM4.04m | 5:27PM4.44m | 5:53AM4.20m | 6:10PM4.59m | 6:34AM4.26m | 6:49PM4.60m | 7:11AM4.23m | 7:27PM4.47m | 7:47AM4.10m | 8:03PM4.24m | 8:21AM3.91m | 8:37PM3.92m | ||||||||
Low Tide | 10:16AM0.48m | 10:49PM0.17m | 11:05AM0.20m | 11:36PM-0.06m | 11:50AM0.01m | 00:20AM-0.18m | 12:33PM-0.07m | 1:01AM-0.16m | 1:14PM-0.03m | 1:41AM-0.02m | 1:55PM0.13m | 2:20AM0.22m | 2:35PM0.38m | 2:59AM0.54m | |||||||
 | |  | | | | | | | | |  |  |  | | | | | | | | |
 | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:11 | — | — |
 | — | — | 9:31 | — | — | 9:30 | — | — | 9:29 | — | — | 9:27 | — | — | 9:24 | — | — | 9:22 | — | — | 9:22 |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — | — | — | 1 | 2 | — | — |
Temp °C | 23 | 29 | 29 | 25 | 26 | 26 | 22 | 26 | 29 | 20 | 25 | 27 | 18 | 22 | 24 | 19 | 22 | 24 | 18 | 22 | 22 |
Feels °C | 19 | 26 | 27 | 25 | 26 | 23 | 20 | 22 | 24 | 19 | 21 | 23 | 15 | 18 | 20 | 17 | 20 | 20 | 14 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 8 | W 10 | W 10 | W 10 | W 10 | W 11 | WNW 10 | WNW 9 | — | W 9 | WNW 8 | W 8 | WNW 8 | WNW 8 | — | WNW 7 | NW 6 | ENE 3 | WNW 6 |
| kJ | 26 | 26 | 11 | 100 | 121 | 146 | 154 | 224 | 307 | 144 | — | 73 | 99 | 12 | 83 | 66 | — | 73 | 10 | 1 | 23 |
Swell 2 Height (m) Direction Period (s) | WSW 6 | E 3 | W 12 | SW 6 | SW 6 | — | WNW 12 | — | — | — | — | W 9 | — | — | — | — | — | — | W 8 | — | WNW 10 |
| kJ | 4 | 2 | 25 | 1 | 1 | — | 29 | — | — | — | — | 53 | — | — | — | — | — | — | 4 | — | 9 |
Swell 3 Height (m) Direction Period (s) | WNW 10 | WSW 6 | W 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 6 | — | — |
| kJ | 10 | 4 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — |
Wind waves Height (m) Direction Period (s) | ENE 4 | — | — | — | W 6 | NW 3 | WNW 4 | WNW 4 | NW 5 | NNW 4 | W 9 | NNW 5 | NNE 4 | WNW 8 | NNE 4 | NE 4 | WNW 8 | NNE 4 | N 4 | WNW 7 | NNE 4 |
| kJ | 11 | — | — | — | 1 | 2 | 5 | 7 | 43 | 7 | 165 | 71 | 7 | 96 | 35 | 15 | 72 | 24 | 30 | 40 | 31 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 119 | 436 | 101 | 21 | 90 | 36 | 44 | 158 | 36 | 29 | 158 | 29 | 48 | 87 | 33 | 0 | 158 | 118 | 119 | 429 | 335 |
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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