Surf Forecasts:
Les Dunes surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 2AM (local time) - 5ft (1.5m), 10s period, WNW swell with cross-shore winds.
- Most powerful swell: Tuesday 25 Aug, 8PM (local time) - 8ft (2.5m), 9s period, WSW swell with 1,151 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 2AM (local time) - 5ft (1.5m), 10s period with WNW 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 Friday (Aug 21) at 2AM. The primary swell is predicted to be 1.5m and 10s period with a secondary swell of 1.2m and 9s. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Les Dunes in the next 16 days are 2.5m 9s and forecast to arrive on Tuesday (Aug 25) 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 0.8m 4s period and expected on Sunday (Aug 23) at 8AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 21st Aug) | 5ft (1.5m) 10s |
| Best Surf | 2AM (Fri 21st Aug) | 5ft (1.5m) 10s |
| Most Powerful | 8PM (Tue 25th Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Les Dunes over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the table for Les Dunes over the next couple of weeks.
Straight up, this is a tough outlook. We’ve got a solid 16-day window, but honestly, it’s a real mixed bag and mostly one to watch rather than get excited about. The first real chance of anything decent is a fleeting window on Friday morning, the 21st. The swell is only 4 ft from the west with a 9-second period, but the real kicker is the wind: it’s a gentle cross-shore breeze. It’s not going to be epic, but it could be the most user-friendly wave we see all period. The rest of the time, the wind is mostly cross-on, onshore, or just too strong, making for lumpy, choppy, or just poor conditions.
The water temp is sitting at 70°, which is pretty normal for this time of year, so no excuses on that front.
The big issue is that after that Friday morning window, we hit a massive gap. From Friday afternoon all the way through to the end of the forecast, every single session is rated as poor surf conditions. That’s a long, dry spell. There are some bigger swells in the mix, like 8 ft on the 25th and 8 ft on the 1st of September, but the wind is just ruining it—either straight onshore or strong enough to make a mess of things. The wave energy does get up there, with values hitting 785 and even 1204 (strong to very strong energy), but without the right wind, it’s all just a wasted opportunity.
The only thing that stands out is that Friday morning, August 21st. The swell is small at 4 ft from the west, but with a clean wind and a cross-shore, it’s the only window where the stars align even a little bit. For a beginner-friendly spot like Les Dunes, that’s your best bet. Don’t expect much, but it’s all we’ve got.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri morning. Warm (max 24°C on Sat night, min 15°C on Sat morning). Winds increasing (light winds from the S on Sat afternoon, fresh winds from the ENE by Sat night). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Mon night. Warm (max 29°C on Sun afternoon, min 17°C on Sun morning). Winds decreasing (fresh winds from the ENE on Sun morning, calm by Tue morning). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 | W 9 | WNW 10 | W 9 | W 10 | W 9 | WNW 8 | WNW 8 | W 9 | W 9 | W 8 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | SW 4 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 250 | 235 | 399 | 217 | 226 | 158 | 92 | 24 | 26 | 14 | 6 | 33 | 35 | 32 | 29 | 41 | 785 | 587 | 488 | 414 | 244 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross-on | cross | cross-off | cross | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | on | on | on | cross | on | cross-on |
High Tide | 10:00AM3.17m | 10:32PM2.96m | 11:17AM2.94m | 00:57AM2.80m | 1:45PM2.94m | 2:34AM2.91m | 2:58PM3.13m | 3:30AM3.12m | 3:46PM3.39m | 4:09AM3.37m | 4:22PM3.67m | 4:41AM3.60m | 4:53PM3.92m | ||||||||
Low Tide | 4:50PM1.29m | 5:17AM1.46m | 5:57PM1.52m | 6:29AM1.61m | 7:17PM1.56m | 7:49AM1.56m | 8:32PM1.40m | 8:55AM1.33m | 9:29PM1.12m | 9:45AM1.04m | 10:13PM0.81m | 10:25AM0.73m | 10:51PM0.52m | ||||||||
 | |  |  |  |  | |  | | | | | | |  |  | | | | |  | |
 | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:13 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — |
 | — | — | 9:08 | — | — | 9:07 | — | — | 9:06 | — | — | 9:04 | — | — | 9:01 | — | — | 9:00 | — | 8:58 | — |
mm | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 2 | 3 | 1 | — | — | — | — | 5 |
Temp °C | 20 | 21 | 19 | 18 | 19 | 19 | 18 | 21 | 24 | 21 | 29 | 29 | 23 | 28 | 22 | 23 | 23 | 21 | 21 | 23 | 21 |
Feels °C | 17 | 18 | 16 | 16 | 15 | 15 | 16 | 19 | 22 | 13 | 23 | 23 | 17 | 26 | 19 | 23 | 20 | 20 | 19 | 21 | 18 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | W 9 | WNW 10 | W 9 | — | W 9 | WNW 8 | WNW 8 | W 9 | W 9 | W 8 | WSW 10 | WSW 10 | S 5 | WSW 9 | W 12 | — | WSW 9 | WSW 9 | — | W 13 |
| kJ | 250 | 27 | 399 | 217 | — | 158 | 92 | 24 | 26 | 14 | 6 | 33 | 35 | 13 | 29 | 3 | — | 587 | 488 | — | 3 |
Swell 2 Height (m) Direction Period (s) | W 9 | — | — | — | — | — | — | W 8 | WNW 7 | WNW 7 | W 11 | W 7 | — | WSW 9 | — | W 8 | — | WNW 10 | — | — | — |
| kJ | 15 | — | — | — | — | — | — | 22 | 5 | 5 | 2 | 1 | — | 32 | — | 1 | — | 10 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 10 | — | SE 5 | NW 7 | NW 7 | — | — | — | W 8 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 8 | — | 1 | 2 | 2 | — | — | — | 1 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 9 | W 9 | WNW 9 | — | W 10 | — | — | — | ENE 3 | ENE 4 | ENE 3 | ENE 4 | SE 4 | SSE 5 | SSW 4 | SW 4 | WSW 8 | — | — | WSW 8 | WSW 8 |
| kJ | 194 | 235 | 265 | — | 226 | — | — | — | 3 | 19 | 7 | 15 | 5 | 24 | 14 | 41 | 785 | — | — | 414 | 244 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 68 | 68 | 22 | 9 | 353 | 9 | 0 | 9 | 33 | 264 | 261 | 368 | 469 | 136 | 272 | 152 | 343 | 19 | 19 | 128 | 19 |
Best forecast wave conditions in Vendee | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
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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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