Surf Forecasts:
Les Dunes surf forecast from 25 Aug 2026:
- Best quality surf: Sunday 30 Aug, 8AM (local time) - 5ft (1.5m), 8s period, W swell with cross-onshore winds.
- Most powerful swell: Monday 31 Aug, 8PM (local time) - 7.5ft (2.3m), 9s period, W swell with 828 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 8AM (local time) - 5ft (1.5m), 8s period with W swell.
Best Forecast Surf Conditions for Les Dunes this week:
The surf forecast for Les Dunes over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 30) at 8AM. The primary swell is predicted to be 1.5m and 8s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Les Dunes in the next 16 days are 2.3m 9s and forecast to arrive on Monday (Aug 31) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Wednesday (Aug 26) at 2PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 30th Aug) | 5ft (1.5m) 8s |
| Best Surf | 8AM (Sun 30th Aug) | 5ft (1.5m) 8s |
| Most Powerful | 8PM (Mon 31st Aug) | 7.5ft (2.3m) 9s |
Table - best surf conditions forecast for Les Dunes over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s coming for the next couple weeks. I gotta be honest, most of this forecast for Les Dunes is a bummer. We’re looking at a long stretch of poor surf with onshore winds and messy waves. The first real chance at something decent doesn’t show up until Tuesday the 1st of September, and even that’s a small window before the wind turns bad again.
Right now, the water temperature is pretty normal for this time of year, nothing special.
The first flicker of hope is on Tuesday the 1st of September. Les Dunes has a morning session worth waking up for. We’re looking at a 5ft swell from the west, with a period of 10 seconds – that’s a proper groundswell with some grunt. The wind is a gentle cross-shore breeze, so it’ll be clean with just a touch of cross-chop. The combined wave energy is moderate, and the waves will have some shape. It might be a bit much for total beginners, but it’s rideable. Just know the crowds can pop up sometimes.
After that, the wind switches back onshore, and the quality goes down the drain for days. The bigger swells that roll through are attached to strong, cross-onshore winds, making it a choppy, lumpy mess. Being an exposed beach break, Les Dunes will be too blown out for decent riding. Honestly, on those days with strong wind and decent swell, this spot looks way better for kite surfing than paddle surfing.
The final standout to mark on your calendar is Monday the 8th of September. The swell is forecast to be massive – 10ft from the west with a very long period of 15 seconds. That’s a lot of water moving, and the wave energy is huge. But this one is for experts only. The size is way beyond what any beginner or intermediate should be in, and the cross-shore wind will add some tricky chop. The long period makes it a true groundswell, which can be a bit straight at a beach break, but there’ll be plenty of power. Crowds are likely, but with a swell like that, there’ll be plenty of space for the ones who can handle it.
So, bottom line: you’ve got that window on Tuesday the 1st of September and a big, expert-only day on Monday the 8th. The rest of the 16-day window is pretty dead. A quiet run like this isn't unusual here, so don’t lose hope – forecasts can change.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Warm (max 29°C on Wed afternoon, min 19°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Thu night. Warm (max 21°C on Sun afternoon, min 17°C on Thu night). Winds decreasing (strong winds from the SW on Fri afternoon, light winds from the W by Sun morning). | ||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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 9 | WSW 8 | W 11 | SW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 8 | W 7 | WSW 7 | WSW 9 | W 8 | WSW 7 | WSW 8 | WSW 9 | W 8 | W 7 | W 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 15 | 13 | 10 | 26 | 32 | 37 | 33 | 48 | 192 | 131 | 237 | 732 | 428 | 310 | 559 | 505 | 217 | 134 | 106 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-off | cross-off | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | on | cross-on |
High Tide | 4:09AM3.37m | 4:22PM3.67m | 4:41AM3.60m | 4:53PM3.92m | 5:10AM3.82m | 5:21PM4.14m | 5:38AM3.99m | 5:48PM4.31m | 6:05AM4.13m | 6:16PM4.41m | 6:32AM4.20m | 6:45PM4.42m | |||||||
Low Tide | 9:29PM1.12m | 9:45AM1.04m | 10:13PM0.81m | 10:25AM0.73m | 10:51PM0.52m | 11:02AM0.46m | 11:26PM0.27m | 11:37AM0.24m | 00:00AM0.09m | 12:11PM0.10m | 00:33AM-0.01m | 12:46PM0.04m | 1:08AM-0.01m | ||||||
 |  | |  | |  |  | | | | | |  |  | | | | | | |
 | — | 7:16 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — |
 | 9:01 | — | — | 9:00 | — | 8:58 | — | — | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:51 | — |
mm | 2 | — | — | — | — | 1 | 1 | 1 | 1 | 8 | 6 | 2 | — | — | — | 1 | — | — | — |
Temp °C | 23 | 21 | 21 | 21 | 20 | 29 | 26 | 21 | 20 | 20 | 19 | 20 | 19 | 20 | 20 | 20 | 20 | 21 | 20 |
Feels °C | 23 | 21 | 20 | 20 | 22 | 28 | 26 | 20 | 19 | 19 | 15 | 14 | 14 | 17 | 17 | 18 | 19 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | S 5 | SW 4 | WSW 8 | WNW 10 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 8 | WNW 11 | WSW 7 | — | — | — | — | WSW 9 | W 8 | W 7 | W 7 |
| kJ | 13 | 4 | 6 | 20 | 32 | 37 | 33 | 48 | 192 | 11 | 151 | — | — | — | — | 505 | 217 | 134 | 106 |
Swell 2 Height (m) Direction Period (s) | WSW 9 | WSW 8 | W 11 | W 8 | WNW 10 | WNW 9 | WNW 8 | WNW 8 | — | — | W 13 | — | — | — | — | — | — | — | — |
| kJ | 15 | 13 | 10 | 1 | 18 | 16 | 13 | 19 | — | — | 13 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 9 | W 12 | W 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SW 4 | SW 3 | SW 6 | — | — | W 4 | — | — | W 7 | WSW 7 | WSW 9 | W 8 | WSW 7 | WSW 8 | — | — | — | — |
| kJ | — | 2 | 3 | 26 | — | — | 6 | — | — | 131 | 237 | 732 | 428 | 310 | 559 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 226 | 237 | 237 | 151 | 151 | 3 | 22 | 19 | 42 | 252 | 237 | 172 | 273 | 128 | 283 | 128 | 37 | 355 | 360 |
Best forecast wave conditions in Vendee | |||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Les Dunes Surf forecast
The above surf forecast table for Les Dunes provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Les Dunes can be found by selecting the local surf guide option on the grey menu. Our Les Dunes 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 (Les Dunes) 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 Les Dunes 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.
Les Dunes is 8 km (5 miles) from Les Sables-d'Olonne. If you plan a holiday in Vendee, look for hotels and other accommodation in Les Sables-d'Olonne. Les Sables-d'Olonne has rooms for a wide range of budgets as well as car hire and transport links.
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