Surf Forecasts:
Les Dunes surf forecast from 31 Aug 2026:
- Best quality surf: Monday 31 Aug, 8PM (local time) - 5.5ft (1.7m), 10s period, W swell with cross-shore winds.
- Most powerful swell: Monday 31 Aug, 11AM (local time) - 6.5ft (2.0m), 10s period, W swell with 755 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 8PM (local time) - 5.5ft (1.7m), 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 8PM. The primary swell is predicted to be 1.7m 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 2.0m 10s and forecast to arrive on Monday (Aug 31) at 11AM. 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 Wednesday (Sep 02) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Mon 31st Aug) | 5.5ft (1.7m) 10s |
| Best Surf | 8PM (Mon 31st Aug) | 5.5ft (1.7m) 10s |
| Most Powerful | 11AM (Mon 31st Aug) | 6.5ft (2.0m) 10s |
Table - best surf conditions forecast for Les Dunes over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here, and I’ve been staring at the charts for Les Dunes. Let’s be straight with you – this stretch of coast is mostly a frustrating watch over the next couple of weeks. We’ve got a real mix of waiting, some promising clean windows, and a lot of days where the wind just ruins it. The good news? There are a couple of specific sessions that look worth the paddle.
The first real chance to get in the water that’s worth talking about is on Tuesday morning, September the 1st. The wind is forecast to be dead calm, absolutely glassy. That’s the kind of magic that makes you forget all the bad days. The swell is a clean 4 ft from the west, with a moderate combined energy of (273). It’s got a period of 10 seconds, so it’s got some shape to it. The only catch is the guidance is saying this swell might be a little too big for this particular break, which is a beginner spot. So if you’re a more experienced surfer on a bigger board, this could be a real treat. The water is sitting at 69°, which is just about normal for this time of year, so no surprises there.
After that, we hit a long, dry spell. All the way through Thursday, Friday, and into the next week, the conditions are mostly poor – chop, cross-onshore winds, and tiny swell. There’s a little glimmer on Saturday morning, September 5th, with an offshore wind from the NNE at 15 mph. That’s a clean, offshore wind, which is a major positive. The swell is small, 3 ft from the WNW, but the period jumps to 10 seconds and the combined energy is a solid (280). It’s a surfable wave, but it’s not a standout. The real gem of the whole forecast comes a few days later.
Mark your calendar for Tuesday morning, September 8th. This is the best on offer. The wind is light from the east at 5 mph, creating a cross-offshore breeze that will keep the waves clean. The swell is 4 ft from the west, with a period of 12 seconds – that’s a proper groundswell. The combined energy is a serious (464). This is a solid, powerful swell. The caveat here is the same as before: the guidance says it might be too big for this spot, which is a beginner-friendly beach break. The long period (12s) will mean long, clean lines, but at a beach break like this, it can sometimes break a bit too straight. For experienced surfers, this is the session. The crowds are listed as "sometimes," so you might have some company, but it’s worth it.
The swell drops off hard after that. We get a few days of strong onshore winds and tiny, weak waves. By Monday, September 14th, we’re looking at 1.0 ft of swell and a fresh cross-shore wind. It’s a tough run. The last mention of any real energy is Tuesday afternoon, September 15th, with a 2 ft swell from the west with a period of 11 seconds and a combined energy of (118), but it’s cross-on shore and choppy. Nothing to get excited about.
So, to sum it up: if you’re an expert or a strong intermediate, the Tuesday morning, September 8th session is the clear winner – that 4 ft, 12-second groundswell with light winds is a proper window. The glassy Tuesday morning on September 1st is a solid consolation for the less experienced. The rest of the 16-day window is mostly a write-off for paddle surfing. If you’re a kiter, the strong winds and choppy conditions on the 10th and 11th might look more interesting than it does for us.
Stay patient, and keep your eyes on the forecast. Things can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Mon afternoon, min 16°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sat night, min 16°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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) | W 10 | W 10 | W 10 | W 10 | W 9 | W 9 | W 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | W 8 | W 8 | WNW 9 | WNW 10 | WNW 10 | WNW 13 | WNW 12 | WNW 11 | W 10 | WNW 9 |
Wave Graph | |||||||||||||||||||||
755 | 635 | 379 | 273 | 168 | 78 | 34 | 51 | 19 | 87 | 68 | 63 | 68 | 108 | 128 | 128 | 367 | 250 | 117 | 71 | 28 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | glassy | cross-on | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-off | cross-off | cross | cross-off | off | cross-off | off | cross-off | glassy | off |
High Tide | 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 | 11:13AM3.24m | 00:45AM3.11m | 1:32PM3.31m | 2:26AM3.31m | ||||||||
Low Tide | 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 | 5:09AM1.16m | 5:52PM1.13m | 6:29AM1.26m | 7:18PM1.08m | ||||||||
7:24 | — | — | 7:26 | — | — | 7:26 | — | — | 7:28 | — | — | 7:30 | — | — | 7:31 | — | — | 7:31 | — | — | |
— | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:39 | — | — | 8:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 20 | 19 | 17 | 19 | 18 | 17 | 19 | 18 | 19 | 21 | 20 | 21 | 21 | 20 | 18 | 23 | 25 | 20 | 27 | 29 |
Feels °C | 16 | 18 | 18 | 17 | 18 | 15 | 14 | 16 | 16 | 19 | 20 | 19 | 21 | 19 | 19 | 16 | 19 | 21 | 14 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | — | W 10 | W 10 | W 10 | W 9 | W 9 | W 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | W 8 | W 8 | WNW 9 | WNW 10 | WNW 10 | WNW 13 | WNW 12 | WNW 11 | W 10 | WNW 9 |
— | 635 | 379 | 273 | 168 | 78 | 34 | 51 | 19 | 87 | 68 | 63 | 68 | 108 | 128 | 128 | 367 | 250 | 117 | 71 | 28 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 10 | — | — | — | — | — | — | W 13 | — | — | — | — | — |
— | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | 81 | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 15 | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 71 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | W 10 | — | — | — | — | NW 3 | NW 4 | — | WNW 3 | — | — | — | — | NW 3 | WNW 4 | NNE 2 | — | NE 2 | E 3 | — | ESE 3 |
755 | — | — | — | — | 6 | 3 | — | 4 | — | — | — | — | 2 | 11 | 1 | — | 1 | 3 | — | 6 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 293 | 68 | 9 | 3 | 22 | 0 | 22 | 22 | 237 | 22 | 9 | 0 | 0 | 22 | 0 | 0 | 22 | 0 | 3 | 0 | 89 |
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.











