Surf Forecasts:
Belle Ile surf forecast from 14 Aug 2026:
- Best quality surf: Thursday 20 Aug, 11AM (local time) - 4ft (1.2m), 9s period, WNW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 2AM (local time) - 4.5ft (1.3m), 9s period, WNW swell with 273 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 11AM (local time) - 4ft (1.2m), 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 Thursday (Aug 20) at 11AM. The primary swell is predicted to be 1.2m and 9s 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 1.3m 9s and forecast to arrive on Thursday (Aug 20) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Friday (Aug 21) at 5AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Thu 20th Aug) | 4ft (1.2m) 9s |
| Best Surf | 11AM (Thu 20th Aug) | 4ft (1.2m) 9s |
| Most Powerful | 2AM (Thu 20th Aug) | 4.5ft (1.3m) 9s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Right, let’s have a look at what’s on the menu for the next couple of weeks around Belle Ile.
To be honest, for the first week and a half, it’s pretty gutless. We’ve got tiny, weak swell and a lot of onshore winds tossing things around. The water temperature is 69°F, which is a touch warmer than normal for this time of year, so that’s a slight silver lining, but you won’t need more than a spring suit. There’s a real flat spell from the 17th through to the 25th, with barely a ripple. If you’re hanging for a wave, you might be better off finding something else to do.
The first sign of life comes on Wednesday the 26th, but it’s still pretty marginal. We see a pulse of 4ft W swell arriving in the afternoon, with a period of 10 seconds and light cross-on winds. There’s some moderate wave energy in the water (316), but it’s not enough to get too excited about, and the conditions are still ordinary.
Thursday the 27th is when things start to get a bit more interesting, size-wise. The morning brings 5ft W swell at 8 seconds, with light onshore winds. It’s a bit lumpy, but surfable for the keen ones. The afternoon sees the swell bump up to 7ft from the WSW, with the period dropping to 8 seconds. The energy is building (560), and the winds stay light. It’s not perfect, but it’s the best we’ve seen so far. You’d want to be comfortable in slightly messed-up conditions.
The standout, and I mean the *only* real standout of this whole window, is that Saturday the 29th afternoon. We’ve got a solid 10ft W swell rolling in with a 12-second period. The energy is strong, with readings of 2297. The winds ease off to a moderate cross-shore, and the notes say conditions are favorable. Belle Ile is an exposed break, and it’ll be handling this size with authority. Now, this is a powerful, solid swell, definitely not for beginners. It’s one for the experienced crew. The cross-shore wind will keep it a bit of a handful, but that’s what you want. It’s the only time in the next two weeks where the size, period, and wind all kind of line up to make something special. For the days before that, everything is either too small or blown out. The build-up on the 28th looks like a complete mess, with near-gale force winds, so you can skip that.
So, mark your calendar for that Saturday. It’s a long-range call, so don’t take it to the bank just yet, but it’s got the potential to be a proper session. Before that, it’s a whole lot of nothing.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Fri night, min 17°C on Sun night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Mon night, min 15°C on Wed night). Winds increasing (light winds from the NNW on Mon night, fresh winds from the WNW by Wed night). | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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) | W 9 | W 9 | WNW 8 | W 8 | WNW 7 | WNW 8 | WNW 8 | WNW 6 | NW 7 | WNW 7 | WNW 5 | WNW 7 | W 7 | WNW 6 | W 7 | WNW 4 | WNW 9 | WNW 9 | WNW 9 | WNW 9 |
Wave Graph | ||||||||||||||||||||
169 | 74 | 122 | 131 | 147 | 64 | 72 | 47 | 12 | 27 | 23 | 16 | 35 | 30 | 28 | 55 | 273 | 213 | 180 | 101 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | cross | on | cross-off | cross | on | cross-off | cross | on | cross | on | on | cross-on | cross-on | on | cross-off | cross-off | on | cross-off |
High Tide | 6:49PM4.60m | 7:11AM4.23m | 7:27PM4.47m | 7:47AM4.10m | 8:03PM4.24m | 8:21AM3.91m | 8:37PM3.92m | 8:55AM3.67m | 9:12PM3.58m | 9:30AM3.40m | 9:51PM3.24m | 10:13AM3.14m | 10:42PM2.93m | |||||||
Low Tide | 1:01AM-0.16m | 1:14PM-0.03m | 1:41AM-0.02m | 1:55PM0.13m | 2:20AM0.22m | 2:35PM0.38m | 2:59AM0.54m | 3:17PM0.69m | 3:40AM0.88m | 4:04PM1.03m | 4:28AM1.21m | 4:59PM1.33m | ||||||||
— | — | 7:07 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:15 | — | — | |
— | 9:27 | — | — | 9:24 | — | — | 9:22 | — | — | 9:22 | — | — | 9:20 | — | — | 9:17 | — | — | 9:15 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 28 | 19 | 22 | 26 | 19 | 22 | 25 | 18 | 21 | 24 | 18 | 20 | 20 | 18 | 19 | 20 | 16 | 19 | 20 |
Feels °C | 22 | 25 | 16 | 19 | 24 | 16 | 19 | 19 | 16 | 18 | 19 | 17 | 18 | 18 | 16 | 14 | 14 | 14 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | WNW 8 | WNW 8 | WNW 7 | WNW 8 | WNW 8 | WNW 6 | NW 7 | NW 10 | WNW 5 | WNW 7 | W 9 | W 8 | NW 6 | W 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 |
106 | 74 | 122 | 14 | 147 | 64 | 72 | 47 | 12 | 4 | 20 | 16 | 6 | 11 | 6 | 7 | 59 | 213 | 180 | 101 | |
Swell 2 Height (m) Direction Period (s) | — | W 11 | — | — | — | — | — | W 8 | W 7 | WNW 10 | WNW 8 | WNW 4 | — | — | WNW 9 | — | — | — | W 9 | W 10 |
— | 2 | — | — | — | — | — | 5 | 4 | 10 | 23 | 1 | — | — | 8 | — | — | — | 15 | 45 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 11 | — | W 10 | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | 2 | — | 2 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | W 9 | NW 6 | NNE 3 | W 8 | NNE 4 | NNE 3 | — | NE 3 | NNE 3 | WNW 7 | NE 3 | — | W 7 | WNW 6 | W 7 | WNW 4 | WNW 9 | — | — | NE 4 |
169 | 50 | 4 | 131 | 11 | 3 | — | 5 | 2 | 27 | 2 | — | 35 | 30 | 28 | 55 | 273 | — | — | 12 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 158 | 29 | 29 | 436 | 44 | 90 | 435 | 108 | 214 | 436 | 156 | 433 | 617 | 118 | 90 | 672 | 36 | 0 | 158 | 29 |
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.











