Surf Forecasts:
Belle Ile surf forecast from 8 Sep 2026:
- Best quality surf: Monday 14 Sep, 5AM (local time) - 3.5ft (1.0m), 10s period, WNW swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 11AM (local time) - 7.5ft (2.3m), 11s period, WSW swell with 1,174 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 5AM (local time) - 3ft (0.9m), 9s period with NW 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 (Sep 10) at 5AM. The primary swell is predicted to be 0.9m and 9s 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 2.3m 11s and forecast to arrive on Tuesday (Sep 08) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Friday (Sep 11) at 11PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 10th Sep) | 3ft (0.9m) 9s |
| Best Surf | 5AM (Mon 14th Sep) | 3.5ft (1.0m) 10s |
| Most Powerful | 11AM (Tue 8th Sep) | 7.5ft (2.3m) 11s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Ahoy, crew, Rusty here. Let’s have a look at what’s on the menu for the next couple of weeks at Belle Ile.
Straight up, the first week is a bit of a write-off. We’ve got a messy start with a strong cross-onshore breeze and a solid 7ft to 8ft swell from the WSW on Tuesday the 8th of September, but the wind is just howling at 28 mph, making it a complete washing machine. Combined wave energy is high at 961, but it’s all for nothing. After that, it’s a long, flat, and choppy slog until we get a real glimmer of hope.
The first real standout is the morning of Friday the 11th of September. The wind drops to a glassy 3 mph from the NW, and we get a clean 3ft swell from the West with a period of 10 seconds. The combined energy is a moderate 215, and with the conditions described as glassy, this is your window for a proper session. The break is a beginner-friendly spot, so it’s a good one for all levels, but keep in mind crowds are sometimes a factor here. The water temperature is about average for this time of year.
The next clear winner is the morning of Monday the 14th of September. We’ve got a light offshore breeze from the ENE at 3 mph, with a clean 3ft swell from the WNW. The period is 10 seconds, and the combined energy is 261 – moderate and punchy. The conditions are described as clean, so this is another top pick. The offshore wind will keep the faces nice and smooth.
Looking further out, the morning of Saturday the 19th of September shows some promise with a fresh offshore breeze from the East at 19 mph, and a 3ft swell from the WNW. The swell period is 10 seconds, and the combined energy is 224. The wind is strong offshore, so it’ll be clean, but the swell is small. It’s a marginal call, but worth a look if you’re desperate. Bear in mind, this is a long-range call, so things could change.
Overall, the best bets are the glassy Friday morning the 11th and the clean Monday morning the 14th. The rest of the fortnight is mostly small, choppy, or onshore. Stick to those two windows and you’ll get some clean lines.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue morning. Very mild (max 19°C on Tue morning, min 15°C on Wed night). Winds decreasing (near gales from the NNW on Tue afternoon, light winds from the E by Thu morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Fri night, min 14°C on Fri night). Winds decreasing (fresh winds from the W on Fri afternoon, light winds from the NW by Sun morning). | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | WSW 11 | W 9 | WNW 9 | W 9 | WNW 8 | WNW 10 | WNW 9 | WNW 8 | W 8 | W 10 | W 9 | W 8 | W 8 | WNW 15 | WNW 13 | WNW 13 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1174 | 868 | 528 | 363 | 137 | 142 | 53 | 41 | 28 | 371 | 263 | 161 | 100 | 172 | 424 | 235 | 227 | 205 | 169 | 147 | 106 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-off | off | cross-on | on | cross | on | cross-off | cross | on | cross | cross-on | on | cross | off | glassy | cross-off |
High Tide | 3:44PM3.88m | 4:15AM3.81m | 4:31PM4.21m | 4:57AM4.06m | 5:11PM4.44m | 5:34AM4.23m | 5:49PM4.55m | 6:09AM4.31m | 6:23PM4.52m | 6:41AM4.28m | 6:55PM4.39m | 7:11AM4.18m | 7:26PM4.16m | ||||||||
Low Tide | 9:11AM0.80m | 9:47PM0.46m | 10:04AM0.46m | 10:35PM0.15m | 10:49AM0.17m | 11:17PM-0.07m | 11:30AM-0.02m | 11:56PM-0.16m | 12:09PM-0.09m | 00:32AM-0.12m | 12:46PM-0.04m | 1:08AM0.03m | 1:23PM0.13m | 1:43AM0.28m | |||||||
 |  |  |  | |  | | | | | | | | | | | | | | | | |
 | 7:39 | — | — | 7:41 | — | — | 7:41 | — | — | 7:43 | — | — | 7:45 | — | — | 7:46 | — | — | 7:48 | — | — |
 | — | 8:39 | — | — | 8:37 | — | — | 8:36 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 19 | 19 | 17 | 17 | 18 | 16 | 18 | 18 | 18 | 19 | 21 | 14 | 16 | 17 | 17 | 19 | 20 | 19 | 21 | 24 |
Feels °C | 14 | 11 | 12 | 13 | 14 | 13 | 14 | 16 | 16 | 17 | 14 | 16 | 13 | 13 | 12 | 16 | 17 | 18 | 20 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | — | W 10 | WNW 9 | W 9 | WNW 8 | WNW 10 | WNW 9 | WNW 8 | W 8 | W 10 | W 9 | W 8 | W 8 | WNW 10 | WNW 13 | WNW 13 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 |
| kJ | — | 54 | 528 | 363 | 137 | 142 | 53 | 41 | 28 | 371 | 263 | 161 | 100 | 114 | 424 | 235 | 227 | 205 | 169 | 147 | 106 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 9 | W 9 | W 8 | W 8 | W 8 | NW 8 | — | — | — | WNW 10 | W 8 | WNW 4 | W 9 | W 9 | WNW 12 | W 10 | WNW 10 | WNW 10 |
| kJ | — | — | — | 181 | 101 | 46 | 46 | 29 | 17 | — | — | — | 20 | 46 | 6 | 42 | 2 | 15 | 68 | 73 | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 12 | W 12 | W 11 | — | — | — | W 16 | WNW 15 | W 16 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 11 | 3 | 9 | — | — | — | 48 | 172 | 45 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 11 | W 9 | NNE 4 | — | — | NE 3 | — | — | WSW 3 | — | — | NNE 3 | — | — | NW 4 | — | WNW 2 | — | — | — | NE 2 |
| kJ | 1174 | 868 | 3 | — | — | 2 | — | — | 3 | — | — | 4 | — | — | 6 | — | 1 | — | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 259 | 242 | 44 | 29 | 173 | 29 | 0 | 156 | 101 | 29 | 44 | 29 | 29 | 90 | 29 | 36 | 121 | 29 | 0 | 0 | 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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