
Surf Forecasts:
Les Dunes surf forecast from 9 Aug 2026:
- Best quality surf: Thursday 13 Aug, 2AM (local time) - 2ft (0.6m), 9s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 14 Aug, 2PM (local time) - 3.5ft (1.0m), 10s period, WNW swell with 193 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 2AM (local time) - 2ft (0.6m), 9s 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 Thursday (Aug 13) at 2AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.1m and 5s. Another secondary swell of 0.4m and 3s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Les Dunes in the next 16 days are 1.0m 10s and forecast to arrive on Friday (Aug 14) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 11) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 13th Aug) | 2ft (0.6m) 9s |
| Best Surf | 2AM (Thu 13th Aug) | 2ft (0.6m) 9s |
| Most Powerful | 2PM (Fri 14th Aug) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for Les Dunes over the next 16 days.
The Lowdown
Alright folks, Rusty here with the imperial version.
First thing you need to know: this entire 16-day window is a proper struggle. We’re looking at Les Dunes, and honestly, it’s a long, flat, frustrating run. The water temperature is sitting around 67°, which is pretty normal for this time of year, so at least you won’t be freezing while you’re sitting there waiting for a bump.
The opening days are a write-off. From Sunday the 9th right through to the morning of Sunday the 16th, the swell is tiny, topping out at just 3ft. The combined wave energy stays weak, in the low double digits to triple digits (22 to 171), and the winds are mostly cross or cross-on, making for choppy, messy conditions. It’s a grind. There’s a brief moment on Wednesday morning the 12th where the wind goes glassy, but with only 1ft of swell, it’s barely a ripple.
Then we hit a real dead zone. From Monday the 17th through to Friday the 21st, the swell just collapses. We’re talking 0.7ft to 2ft, with combined energy numbers dropping to single digits (7 to 50). Offshore winds make the surface clean, but there is literally no wave to ride. This is a solid week of flatness.
The best looking slot in the whole forecast doesn’t show up until the final days. On Monday morning, August 24th, we finally see something worth getting out of bed for. The swell bumps up to 3ft from the west, with a period of 8 seconds. The combined energy hits 164 (moderate), and crucially, the wind is dead calm. Glassy. The conditions are surfable, but ordinary. It’s the best of a bad bunch, but it’s not a classic.
After that, it fades again. Monday afternoon sees 3ft with a cross-on breeze, turning it choppy.
So, the standout here is Monday morning, the 24th. It’s the only window where the swell clears 3ft and the wind is glassy. But be warned: for a beginner-friendly beach break like Les Dunes, this is the absolute limit of what’s rideable. It’s not going to be epic, but it’s the only chance you’ve got.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 19°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Fri night. Warm (max 31°C on Thu afternoon, min 19°C on Sat morning). Wind will be generally light. | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 9 | WSW 7 | WSW 7 | NW 4 | WNW 9 | WSW 7 | NW 8 | W 10 | W 11 | W 10 | W 9 | W 9 | W 9 | W 10 | WNW 10 | W 9 | WNW 5 | WNW 8 | WNW 8 | WNW 5 |
Wave Graph | ||||||||||||||||||||
17 | 18 | 17 | 17 | 15 | 9 | 17 | 7 | 38 | 71 | 60 | 83 | 87 | 128 | 154 | 80 | 40 | 99 | 99 | 50 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-on | off | cross-off | cross-on | cross-off | glassy | cross-on | cross-off | cross | cross | cross-off | cross | cross-on | cross-on | cross | cross-on | cross-on |
High Tide | 2:46PM3.59m | 3:27AM3.62m | 3:51PM3.93m | 4:24AM3.90m | 4:43PM4.27m | 5:13AM4.13m | 5:29PM4.52m | 5:56AM4.28m | 6:11PM4.66m | 6:35AM4.32m | 6:50PM4.66m | 7:12AM4.27m | 7:26PM4.52m | |||||||
Low Tide | 8:40PM0.77m | 9:08AM0.75m | 9:45PM0.44m | 10:06AM0.44m | 10:39PM0.11m | 10:57AM0.14m | 11:27PM-0.14m | 11:42AM-0.07m | 00:11AM-0.26m | 12:25PM-0.16m | 00:53AM-0.25m | 1:07PM-0.13m | 1:33AM-0.11m | |||||||
— | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | |
— | 9:27 | — | — | 9:25 | — | — | 9:23 | — | — | 9:22 | — | — | 9:21 | — | — | 9:19 | — | — | 9:17 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — |
Temp °C | 25 | 22 | 23 | 26 | 24 | 27 | 29 | 28 | 28 | 30 | 28 | 30 | 31 | 28 | 27 | 28 | 23 | 21 | 21 | 19 |
Feels °C | 23 | 19 | 22 | 24 | 21 | 25 | 27 | 26 | 27 | 27 | 25 | 28 | 27 | 24 | 25 | 24 | 21 | 22 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WSW 7 | WSW 7 | WSW 7 | WSW 7 | NW 4 | NW 8 | WNW 8 | W 11 | W 10 | W 9 | W 9 | W 9 | W 10 | WNW 10 | W 9 | WNW 5 | WNW 8 | — | W 8 |
17 | 18 | 16 | 16 | 10 | 3 | 17 | 6 | 38 | 71 | 60 | 83 | 87 | 128 | 154 | 80 | 40 | 99 | — | 21 | |
Swell 2 Height (m) Direction Period (s) | W 6 | WNW 9 | WNW 9 | WSW 7 | WNW 9 | WSW 7 | WSW 7 | W 10 | WNW 8 | W 6 | W 5 | — | W 12 | — | — | — | W 9 | W 8 | — | WNW 8 |
3 | 8 | 17 | 17 | 15 | 9 | 4 | 7 | 6 | 1 | 1 | — | 26 | — | — | — | 39 | 68 | — | 12 | |
Swell 3 Height (m) Direction Period (s) | — | — | WNW 9 | — | W 11 | WNW 8 | W 10 | WSW 6 | W 6 | — | — | — | — | — | — | — | — | — | — | — |
— | — | 17 | — | 2 | 7 | 8 | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NW 3 | NW 4 | NNW 4 | NW 4 | NW 4 | — | — | NW 3 | — | — | NW 3 | WNW 4 | NW 3 | NW 4 | NW 5 | NW 4 | — | — | WNW 8 | WNW 5 |
2 | 11 | 8 | 17 | 18 | — | — | 1 | — | — | 4 | 1 | 5 | 11 | 17 | 10 | — | — | 99 | 50 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 371 | 151 | 3 | 274 | 191 | 255 | 388 | 180 | 3 | 226 | 0 | 9 | 22 | 0 | 9 | 474 | 9 | 6 | 293 | 83 |
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.











