Surf Forecasts:
Les Dunes surf forecast from 28 Aug 2026:
- Best quality surf: Monday 31 Aug, 11PM (local time) - 4.5ft (1.4m), 10s period, W swell with cross-onshore winds.
- Most powerful swell: Saturday 29 Aug, 5PM (local time) - 8ft (2.5m), 9s period, WSW swell with 1,107 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-onshore 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 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 8PM.
| 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) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Les Dunes over the next 16 days.
The Lowdown
Alright, let’s talk about Les Dunes. Water temp is sitting right around 68°F, which is about average for the season, so nothing unusual there.
Looking at the full 16-day window, I gotta level with you – it’s a tough outlook. There are some pushes of swell, but the wind is just ruining it for us most of the time. It’s one of those periods where you can see the energy, but you can’t surf it clean.
The first action comes on Friday the 28th of August with a 5ft swell out of the WSW, but it’s got rain showers and a strong 30 km/h onshore wind. The wave energy is moderate, but the quality is poor. Saturday the 29th sees a bigger pulse, building to 8ft in the morning and over 8ft in the afternoon, also from the WSW. The energy jumps into a strong range, but it’s being smashed by 40 km/h onshore winds. Sunday the 30th drops back to around 5ft with a moderate onshore breeze, still not good. Monday the 31st brings a 6ft W swell but with a cross-onshore wind, leaving it choppy. This whole first stretch is a write-off.
There is one shining moment: Tuesday morning, the 1st of September. We get a 4ft W swell, with a clean, light offshore breeze from the N. The forecast even says wind and tide are favorable, but that it might be too big for the break. The period is a steady 10 seconds, which is good for shape. This is your best chance – clean conditions, a real window. The energy is moderate.
After that, we’re into a long, flat, frustrating stretch. From Tuesday afternoon all the way through to the 12th of September, it’s tiny. We’re talking 1ft to 2ft waves with very low energy readings. There are some glassy mornings on the 4th and the 9th of September, but there’s simply no swell to ride. On the 12th, there’s a 1ft swell with a very long 12-second period – a pure groundswell – but at that size, it’s not doing anything for Les Dunes.
Look, if you’re serious, circle that Tuesday morning, the 1st of September. That’s your one clean shot. The rest of the time, you’re either getting blown out or staring at flat water.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri afternoon. Warm (max 20°C on Fri afternoon, min 19°C on Fri afternoon). Winds decreasing (strong winds from the SW on Sat afternoon, light winds from the WSW by Sat night). | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Mon afternoon, min 17°C on Tue morning). Wind will be generally light. | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 7 | WSW 8 | WSW 7 | WSW 9 | WNW 9 | W 9 | W 9 | W 8 | W 9 | W 10 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | WNW 8 | W 7 | WNW 8 | WNW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 218 | 583 | 544 | 1107 | 289 | 408 | 299 | 371 | 551 | 502 | 320 | 230 | 136 | 57 | 34 | 33 | 19 | 28 | 45 | 63 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-off | cross-off | cross | off | cross-off | cross | cross | cross-on | cross | cross-off |
High Tide | 5:48PM4.31m | 6:05AM4.13m | 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 | |||||||
Low Tide | 00:00AM0.09m | 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 | |||||||
 |  |  |  |  | |  | |  | | | | | | | | | | | | |
 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — | 7:26 | — | — | 7:28 | — | — |
 | 8:54 | — | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — |
mm | 2 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 20 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 18 | 20 | 19 | 18 | 20 | 18 | 19 | 19 | 19 |
Feels °C | 16 | 15 | 15 | 14 | 18 | 17 | 16 | 18 | 18 | 18 | 18 | 17 | 16 | 16 | 16 | 17 | 15 | 18 | 17 | 18 |
Swell 1 Height (m) Direction Period (s) | W 11 | — | — | — | WNW 9 | W 9 | — | — | W 9 | W 10 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | WNW 8 | W 7 | WNW 8 | WNW 8 |
| kJ | 37 | — | — | — | 289 | 408 | — | — | 551 | 502 | 320 | 230 | 136 | 57 | 34 | 33 | 19 | 28 | 45 | 63 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 5 | — | — | — | — | — |
| kJ | 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | 9 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 7 | WSW 8 | WSW 7 | WSW 9 | WSW 8 | — | W 9 | W 8 | — | — | — | — | WNW 3 | WNW 5 | — | — | WNW 2 | — | — | — |
| kJ | 218 | 583 | 544 | 1107 | 261 | — | 299 | 371 | — | — | — | — | 8 | 27 | — | — | 1 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 237 | 173 | 283 | 355 | 68 | 68 | 128 | 317 | 68 | 68 | 3 | 3 | 226 | 0 | 3 | 22 | 191 | 264 | 466 | 0 |
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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