Surf Forecasts:
Les Dunes surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 5AM (local time) - 3.5ft (1.1m), 9s period, WNW swell with cross-shore winds.
- Most powerful swell: Thursday 20 Aug, 11PM (local time) - 4.5ft (1.4m), 10s period, WNW swell with 358 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 5AM (local time) - 3.5ft (1.1m), 9s 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 5AM. The primary swell is predicted to be 1.1m and 9s 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 1.4m 10s and forecast to arrive on Thursday (Aug 20) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Aug 24) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 21st Aug) | 3.5ft (1.1m) 9s |
| Best Surf | 5AM (Fri 21st Aug) | 3.5ft (1.1m) 9s |
| Most Powerful | 11PM (Thu 20th Aug) | 4.5ft (1.4m) 10s |
Table - best surf conditions forecast for Les Dunes over the next 16 days.
The Lowdown
Hey, Rusty here. Let's be real—this spot's not giving us anything to get excited about. Over the next 16 days, Les Dunes is pretty much a write-off. Water temp is 21°, which is normal for this time of year, so that's not the problem.
Tuesday afternoon, August 18, we've got a piddly 2ft swell from the WNW, 7-second period, and a cross-on breeze making it choppy. Energy is just 30, so there's nothing going on. Wednesday the 19th is even worse—1ft in the morning, maybe 2ft in the afternoon, but onshore winds ruin both. Thursday the 20th sees 3ft from the west, 9-second period, energy at 265, but it's still cross-on and messy. Friday the 21st afternoon gets a bit more juice—4ft, 10 seconds, energy at 479—but that WNW wind is cross-on and lumpy.
The only decent window is Saturday morning, August 22. We've got 3ft from the west, 8-second period, and the wind goes glassy—NNW at just 3 mph. Energy is 111, so it's weak, but those clean conditions make it rideable. It's a beginner-friendly wave, fairly consistent, and crowds are only sometimes an issue. That's your one chance in the whole 16 days.
After that, it's downhill. Sunday the 23rd has 3ft with cross-on wind, Monday the 24th is barely 1ft. From Tuesday the 25th onward, swell stays under 2ft, energy often below 100, and winds are onshore or cross-on. Thursday the 27th afternoon sees 6ft from the west (energy 601), but with a strong onshore wind at 25 mph, it's a total mess. Friday the 28th afternoon hits 8ft from the WSW (energy 927), but again, onshore wind kills it. That's kite-surfing weather, not for paddling.
The gap in decent surf is basically the whole period. Even early September—September 1st and 2nd—offer 5ft to 5ft, but winds are cross or cross-on, and it's not clean. Save your energy and wait for a better forecast.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri morning. Warm (max 22°C on Wed afternoon, min 18°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Sun afternoon, min 16°C on Mon morning). Wind will be generally light. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 7 | W 8 | W 8 | W 4 | WNW 6 | W 9 | W 9 | WNW 9 | W 9 | WNW 10 | WNW 9 | W 8 | W 8 | WNW 5 | WNW 7 | WNW 6 | W 8 | NW 6 | NW 3 | NW 4 |
Wave Graph  | ||||||||||||||||||||
 kJ | 27 | 11 | 10 | 13 | 131 | 165 | 165 | 259 | 176 | 295 | 184 | 111 | 108 | 38 | 54 | 29 | 13 | 12 | 8 | 10 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | on | on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | glassy | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-off |
High Tide | 9:03PM3.61m | 9:19AM3.43m | 9:39PM3.27m | 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 | |||||||
Low Tide | 3:11PM0.62m | 3:34AM0.82m | 3:57PM0.97m | 4:20AM1.17m | 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 | |||||||
 |  | | |  |  | | |  | | |  | | | | | | | | | |
 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:13 | — | — | 7:16 | — | — |
 | — | 9:13 | — | — | 9:10 | — | — | 9:08 | — | — | 9:07 | — | — | 9:06 | — | — | 9:04 | — | — | 9:01 |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 20 | 21 | 22 | 21 | 20 | 20 | 19 | 19 | 19 | 19 | 18 | 19 | 18 | 19 | 20 | 19 | 17 | 18 | 18 |
Feels °C | 18 | 19 | 20 | 20 | 19 | 17 | 17 | 16 | 16 | 16 | 16 | 18 | 17 | 15 | 17 | 17 | 16 | 16 | 16 | 17 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 8 | NW 4 | WNW 10 | WNW 10 | WNW 10 | W 9 | WNW 9 | W 9 | WNW 10 | WNW 9 | W 8 | — | W 9 | W 9 | W 9 | WNW 4 | NW 6 | W 8 | W 9 |
| kJ | 2 | 11 | 5 | 10 | 90 | 85 | 27 | 259 | 176 | 295 | 184 | 111 | — | 24 | 13 | 13 | 5 | 12 | 6 | 6 |
Swell 2 Height (m) Direction Period (s) | W 8 | WNW 6 | W 8 | NW 7 | — | W 9 | — | — | — | — | — | — | — | — | — | — | W 8 | W 8 | — | — |
| kJ | 1 | 4 | 10 | 2 | — | 15 | — | — | — | — | — | — | — | — | — | — | 13 | 5 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | NW 6 | W 14 | — | — | — | — | — | — | — | — | — | — | — | — | WNW 6 | W 10 | — | W 8 |
| kJ | — | — | 1 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 2 | — | 1 |
Wind waves Height (m) Direction Period (s) | WNW 7 | WNW 4 | — | W 4 | WNW 6 | W 9 | W 9 | — | — | W 10 | — | — | W 8 | WNW 5 | WNW 7 | WNW 6 | N 3 | NNE 3 | NW 3 | NW 4 |
| kJ | 27 | 11 | — | 13 | 131 | 165 | 165 | — | — | 184 | — | — | 108 | 38 | 54 | 29 | 5 | 1 | 8 | 10 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 711 | 226 | 283 | 293 | 22 | 203 | 388 | 22 | 68 | 68 | 9 | 0 | 37 | 22 | 22 | 473 | 355 | 441 | 388 | 338 |
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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