Surf Forecasts:
Les Dunes surf forecast from 29 Aug 2026:
- Best quality surf: Monday 31 Aug, 11PM (local time) - 4.5ft (1.4m), 10s period, W swell with cross-shore winds.
- Most powerful swell: Saturday 29 Aug, 5PM (local time) - 10ft (3.0m), 9s period, WSW swell with 1,189 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 11PM (local time) - 4.5ft (1.4m), 10s 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 Monday (Aug 31) at 11PM. The primary swell is predicted to be 1.4m and 10s period. 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 3.0m 9s and forecast to arrive on Saturday (Aug 29) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Sep 04) at 11PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 31st Aug) | 4.5ft (1.4m) 10s |
| Best Surf | 11PM (Mon 31st Aug) | 4.5ft (1.4m) 10s |
| Most Powerful | 5PM (Sat 29th Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Les Dunes over the next 16 days.
The Lowdown
Right, Rusty here. Let’s break down the next couple of weeks.
To be straight with you, most of this forecast is a struggle. We get a big blast of windy, messy surf early on, and then it goes pretty quiet for a long stretch. Only right at the end do we see something worth getting excited about.
Starting Saturday the 29th, Les Dunes has solid size – 8ft to 10ft from the WSW – but a strong 25 mph onshore wind is ruining it. The combined energy is hefty (670-1189), but the surface is just blown out.
Sunday the 30th, it drops to around 5ft from the W, but the wind is still onshore at 12-19 mph. Poor conditions again.
Monday the 31st, the swell holds around 5-6ft from the W with cross-onshore winds at 9-12 mph. Still choppy and not worth it.
Tuesday the 1st of September morning sees the wind go nearly calm at 3 mph from the W, giving a brief clean window, but the swell at 4ft is considered too big for this break. Combined energy is 225. The afternoon gets messy again.
From Wednesday the 2nd through Friday the 4th, the surf drops under 3ft, combined energy falls very low, and the wind stays onshore or cross-onshore. It’s flat and sloppy.
Saturday the 5th and Sunday the 6th are poor. The only near-decent moment is Sunday morning the 6th: glassy calm, 2ft from the WNW with a 10-second period, but combined energy is only 82. It’s surfable but very weak.
Monday the 7th has a slight pickup to 3-4ft with 10-second period and moderate energy at 256-284, but the cross-shore wind keeps it from being any good.
Now, the standout is way out on Sunday the 13th of September. Clean cross-offshore wind from the N and NW at 12 mph. Swell is only 2ft to 2ft, but with a very long 16-17 second period from the WSW. Combined energy is a solid moderate 251-296. At a beach break like Les Dunes, a long period swell will break a bit straight but with that clean wind and decent energy, it’ll offer some punchy, fun little waves for a quiet session. It’s a bit of a wait, and it’s not guaranteed this far out, but it’s the only real hope on the board.
So, if you can wait, target Sunday the 13th. The rest of the run is mostly a right-off.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Sat afternoon. Warm (max 20°C on Sat morning, min 17°C on Mon night). Winds decreasing (strong winds from the SW on Sat afternoon, calm by Mon night). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Thu afternoon, min 16°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 8 | WSW 9 | WSW 8 | W 9 | W 8 | W 8 | W 10 | W 10 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 670 | 1189 | 394 | 377 | 317 | 454 | 575 | 502 | 320 | 225 | 133 | 57 | 34 | 33 | 41 | 155 | 211 | 172 | 81 | 83 | 106 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-off | cross-on | cross | cross | cross | cross-on | on | cross-on | cross-on | cross | on | cross-on | cross-on |
High Tide | 6:16PM4.41m | 6:32AM4.20m | 6:45PM4.42m | 7:01AM4.21m | 7:15PM4.35m | 7:32AM4.14m | 7:48PM4.18m | 8:07AM3.99m | 8:27PM3.93m | 8:47AM3.76m | 9:14PM3.61m | 9:40AM3.48m | 10:23PM3.26m | ||||||||
Low Tide | 12:11PM0.10m | 00:33AM-0.01m | 12:46PM0.04m | 1:08AM-0.01m | 1:22PM0.07m | 1:45AM0.09m | 2:01PM0.20m | 2:24AM0.29m | 2:44PM0.41m | 3:09AM0.57m | 3:34PM0.69m | 4:02AM0.89m | 4:35PM0.96m | ||||||||
 |  |  |  | |  | |  | | | | | | | | | | | | | | |
 | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — | 7:26 | — | — | 7:28 | — | — | 7:30 | — | — |
 | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — |
mm | — | 4 | 1 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 20 | 19 | 18 | 19 | 18 | 18 | 19 | 19 | 19 | 20 | 19 | 18 | 20 | 19 |
Feels °C | 16 | 14 | 18 | 17 | 16 | 17 | 16 | 18 | 19 | 18 | 17 | 15 | 17 | 17 | 17 | 18 | 19 | 19 | 18 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | — | — | WNW 9 | — | — | — | W 10 | W 10 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | — | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 9 |
| kJ | — | — | 147 | — | — | — | 575 | 502 | 320 | 225 | 133 | 57 | 34 | 33 | — | 155 | 211 | 172 | 81 | 83 | 106 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | NW 4 | — | — | — | — | — | — | — | W 16 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — | — | — | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 8 | WSW 9 | WSW 8 | W 9 | W 8 | W 8 | — | — | — | — | WNW 3 | WNW 4 | — | — | W 8 | — | — | — | — | — | — |
| kJ | 670 | 1189 | 394 | 377 | 317 | 454 | — | — | — | — | 4 | 10 | — | — | 41 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 283 | 355 | 68 | 68 | 371 | 338 | 68 | 68 | 3 | 11 | 22 | 22 | 22 | 388 | 264 | 264 | 355 | 22 | 22 | 355 | 22 |
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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