Surf Forecasts:
Belle Ile surf forecast from 5 Sep 2026:
- Best quality surf: Sunday 6 Sep, 2AM (local time) - 4ft (1.2m), 12s period, WNW swell with offshore winds.
- Most powerful swell: Monday 7 Sep, 11AM (local time) - 5ft (1.5m), 14s period, W swell with 919 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 2AM (local time) - 4ft (1.2m), 12s 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 Sunday (Sep 06) at 2AM. The primary swell is predicted to be 1.2m and 12s period. 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 1.5m 14s and forecast to arrive on Monday (Sep 07) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Sunday (Sep 06) at 8AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 6th Sep) | 4ft (1.2m) 12s |
| Best Surf | 2AM (Sun 6th Sep) | 4ft (1.2m) 12s |
| Most Powerful | 11AM (Mon 7th Sep) | 5ft (1.5m) 14s |
Table - best surf conditions forecast for Belle Ile over the next 16 days.
The Lowdown
Alright, let’s break it down. Rusty here, with the forecast for the next couple of weeks.
Honestly, the first week is a flat spell for decent surf. You’re looking at a gap of several days where the conditions are just not cooperating. The wind is messy, the swell is weak, and it’s a tough watch.
The first proper window that gets my attention is Tuesday afternoon, September 8th. The spot is *Belle Ile*. The swell is about 4 feet from the west, with a period of 10 seconds. The wind is going glassy, totally flat calm. That’s the golden ticket. The waves will be clean and smooth. The combined energy of all swells directed here is moderate (268). It’s a beginner break, so it’s a great day for a longboard or a funboard. The water temperature is about average for this time of year.
The next one to put a pin in is Saturday afternoon, September 12th. Same spot, *Belle Ile*. The swell is 4 feet from the west-southwest, with a period of 8 seconds. The wind is glassy again, which is the star of the show. The wave energy is moderate (216). It’s a short-period swell, so it’s not going to be a world-class point break, but on a glassy afternoon, it’ll be fun and clean. Crowds are only occasional, so you’ll have some space.
The rest of the 16 days? It’s mostly small, weak, and the wind is a pain. The Tuesday and Saturday windows are your best bets. It’s a quiet stretch, but that’s how it goes.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Tue morning. Warm (max 24°C on Sun morning, min 15°C on Tue morning). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Fri afternoon. Very mild (max 18°C on Wed afternoon, min 15°C on Tue night). Winds decreasing (fresh winds from the WNW on Wed night, calm by Thu morning). | ||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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 12 | WNW 10 | WNW 10 | WSW 18 | W 14 | W 13 | W 12 | W 11 | W 10 | WNW 9 | W 7 | WNW 8 | WNW 10 | WNW 9 | WNW 9 | WNW 8 | W 8 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 355 | 146 | 98 | 102 | 919 | 835 | 699 | 434 | 268 | 92 | 134 | 250 | 235 | 70 | 52 | 51 | 471 | 298 | 208 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-on | on | on | on | cross-on | cross-on | glassy | cross | cross-on | on | cross-off | glassy | on | cross-on | cross-on | on | cross |
High Tide | 00:24AM3.05m | 1:15PM3.22m | 2:15AM3.19m | 2:44PM3.51m | 3:24AM3.49m | 3:44PM3.88m | 4:15AM3.81m | 4:31PM4.21m | 4:57AM4.06m | 5:11PM4.44m | 5:34AM4.23m | 5:49PM4.55m | |||||||
Low Tide | 6:41AM1.29m | 7:33PM1.10m | 8:05AM1.12m | 8:49PM0.81m | 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 | |||||||
 | |  |  | | | |  | | | | | | | | | |  |  | |
 | — | 7:37 | — | — | 7:37 | — | — | 7:39 | — | — | 7:41 | — | — | 7:41 | — | — | 7:43 | — | — |
 | 8:45 | — | 8:44 | — | — | 8:42 | — | — | 8:39 | — | — | 8:37 | — | — | 8:36 | — | — | 8:34 | — |
mm | — | — | — | — | — | — | — | 7 | 6 | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 23 | 24 | 22 | 21 | 19 | 19 | 18 | 17 | 16 | 17 | 15 | 18 | 17 | 16 | 17 | 17 | 17 | 18 | 19 |
Feels °C | 19 | 18 | 19 | 21 | 18 | 19 | 17 | 16 | 17 | 12 | 11 | 11 | 9 | 16 | 15 | 14 | 14 | 14 | 16 |
Swell 1 Height (m) Direction Period (s) | WNW 12 | WNW 10 | WNW 10 | W 9 | W 14 | W 13 | W 12 | W 11 | W 10 | WNW 9 | W 7 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 8 | W 10 | S 5 | W 8 |
| kJ | 355 | 146 | 98 | 39 | 919 | 835 | 699 | 434 | 268 | 92 | 134 | 22 | 235 | 70 | 52 | 51 | 18 | 12 | 208 |
Swell 2 Height (m) Direction Period (s) | — | NE 4 | SE 4 | WSW 18 | W 9 | — | — | — | — | W 8 | WNW 9 | WNW 10 | WSW 8 | W 7 | WSW 7 | WSW 7 | — | SW 6 | — |
| kJ | — | 3 | 5 | 102 | 73 | — | — | — | — | 37 | 78 | 69 | 22 | 28 | 18 | 18 | — | 8 | — |
Swell 3 Height (m) Direction Period (s) | — | — | SE 4 | NW 9 | NW 9 | — | — | — | — | NW 12 | — | — | — | W 12 | W 12 | W 11 | — | — | — |
| kJ | — | — | 4 | 21 | 19 | — | — | — | — | 6 | — | — | — | 3 | 3 | 9 | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 3 | ESE 4 | — | W 3 | — | WSW 5 | NW 3 | — | — | NNW 4 | NNE 4 | WNW 8 | — | — | — | SW 3 | W 8 | W 8 | — |
| kJ | 2 | 11 | — | 3 | — | 9 | 2 | — | — | 25 | 3 | 250 | — | — | — | 2 | 471 | 298 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 21 | 101 | 44 | 44 | 158 | 36 | 36 | 0 | 36 | 44 | 45 | 0 | 0 | 90 | 29 | 158 | 90 | 33 |
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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