
Surf Forecasts:
Les Dunes surf forecast from 10 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 8PM (local time) - 4.5ft (1.3m), 9s period, WNW swell with cross-offshore winds.
- Most powerful swell: Wednesday 16 Sep, 2AM (local time) - 6ft (1.9m), 7s period, WNW swell with 369 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 2AM (local time) - 2.5ft (0.8m), 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 Saturday (Sep 12) at 2AM. The primary swell is predicted to be 0.8m and 9s period. 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 1.9m 7s and forecast to arrive on Wednesday (Sep 16) at 2AM. Winds are predicted to be cross-shore 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 16) at 11PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 12th Sep) | 2.5ft (0.8m) 9s |
| Best Surf | 8PM (Wed 16th Sep) | 4.5ft (1.3m) 9s |
| Most Powerful | 2AM (Wed 16th Sep) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Les Dunes over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s shaping up for Les Dunes over the next couple of weeks.
Right off the bat, I gotta be straight with you – the next week or so looks pretty grim. We’ve got a long stretch of poor surf conditions, with only a few brief windows of anything rideable. The water is sitting at 71°F which is much warmer than usual for this time of year, a real weird anomaly that’s over 4°F above normal.
The first real sniff of something decent comes on Saturday morning, September 12th. It’s tiny, just 2ft of swell from the west, but the wind goes glassy. That’s right, dead calm. You’ll be able to get out on a longboard or a foamie, but don’t expect any power. The combined energy is weak (64), so it’s really just a paddle and a trim.
Then on Sunday morning, September 13th, we see a bit more life. A 3ft swell from the west-northwest, but with a period of 12 seconds, so there’s a bit more push behind it. The wind is a light cross-offshore from the north-northwest, keeping it clean. The energy is moderate (183). It’s surfable, but still ordinary. Nothing to cancel plans for.
The next standout is Monday morning, September 14th. A clean 2ft swell from the west-northwest, and we get a gentle offshore breeze from the northeast. That’s a good sign for a clean face. The energy is moderate (102). It’s a small wave, but it’ll be the best looking of the early week.
After that, the wind gets nasty again, and we’re back to poor conditions until we hit Thursday morning, September 17th. Now we’re talking. A 3ft swell from the west-northwest with an 11-second period, and a light cross-offshore breeze from the north. The energy is moderate (245) and the report says “expect good surf conditions.” This is the best window in the first week. It’ll be clean, with some shape. The crowd factor is “sometimes” for Les Dunes, so you might have a few others out, but nothing like a circus.
Now, the real one to watch is Friday, September 25th. That’s over two weeks away, so take it with a grain of salt, but the numbers are wild. A big 6ft swell from the west, with a period of 15 seconds – that’s proper groundswell. The energy is massive (1632). Wind and tide are favorable, but here’s the catch: the forecast says it’s predicted to be too big for this break. At over 5ft, it’s getting into the too-big-for-beginners zone, and with that kind of long-period energy, it’ll be closing out and dumping. This is expert-only territory, and honestly, it might be more of a show than a go. Saturday afternoon sees a similar story: 5ft swell, 14-second period, glassy wind, but again, too big for Les Dunes to handle well.
So, bottom line: the best bet in the first week is Thursday, September 17th morning. For the bold and experienced, the Friday, September 25th swell is a monster, but likely unsurfable here. Keep an eye on it, but don’t hold your breath.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Sat afternoon, min 16°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Mon afternoon, min 17°C on Tue night). Winds increasing (light winds from the N on Sun morning, fresh winds from the WNW by Tue night). | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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) | WNW 8 | W 8 | W 8 | WNW 10 | WNW 10 | W 9 | W 8 | W 8 | W 8 | WNW 12 | WNW 11 | W 10 | WNW 10 | W 9 | W 9 | W 9 | W 8 | WNW 7 | WNW 8 | WNW 8 | WNW 10 |
Wave Graph | |||||||||||||||||||||
41 | 29 | 29 | 106 | 154 | 99 | 64 | 61 | 49 | 183 | 153 | 130 | 102 | 87 | 59 | 38 | 111 | 369 | 235 | 184 | 306 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross | cross | cross-off | glassy | cross | cross-off | cross-off | cross | off | off | cross | cross-off | on | cross-on | cross | cross | cross | cross-off |
High Tide | 5:13PM4.54m | 5:36AM4.32m | 5:49PM4.63m | 6:09AM4.37m | 6:22PM4.58m | 6:39AM4.33m | 6:52PM4.43m | 7:06AM4.21m | 7:20PM4.19m | 7:31AM4.03m | 7:46PM3.90m | 7:56AM3.80m | 8:12PM3.59m | ||||||||
Low Tide | 10:40AM0.12m | 11:07PM-0.13m | 11:22AM-0.09m | 11:47PM-0.24m | 12:02PM-0.18m | 00:25AM-0.21m | 12:40PM-0.13m | 1:02AM-0.06m | 1:18PM0.03m | 1:38AM0.20m | 1:56PM0.30m | 2:15AM0.52m | 2:35PM0.63m | 2:54AM0.88m | |||||||
7:37 | — | — | 7:39 | — | — | 7:39 | — | — | 7:41 | — | — | 7:43 | — | — | 7:43 | — | — | 7:45 | — | — | |
— | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:20 | — | — | 8:17 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — |
Temp °C | 18 | 18 | 18 | 18 | 20 | 19 | 20 | 22 | 21 | 20 | 22 | 20 | 21 | 25 | 25 | 22 | 21 | 18 | 17 | 19 | 20 |
Feels °C | 17 | 15 | 16 | 17 | 17 | 17 | 21 | 20 | 18 | 19 | 19 | 17 | 21 | 23 | 23 | 20 | 17 | 13 | 14 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | W 8 | W 8 | WNW 10 | WNW 10 | W 9 | W 8 | W 8 | W 8 | WNW 12 | WNW 11 | W 10 | WNW 10 | W 9 | W 9 | W 9 | WNW 12 | WNW 11 | WNW 8 | W 10 | WNW 10 |
41 | 29 | 29 | 106 | 154 | 99 | 64 | 61 | 49 | 183 | 153 | 130 | 102 | 87 | 59 | 38 | 27 | 38 | 235 | 75 | 306 | |
Swell 2 Height (m) Direction Period (s) | W 8 | NW 9 | WNW 8 | WSW 7 | — | — | — | W 16 | WNW 10 | — | — | — | — | WNW 9 | NW 10 | W 12 | — | — | — | W 13 | W 12 |
35 | 20 | 7 | 11 | — | — | — | 5 | 34 | — | — | — | — | 35 | 23 | 3 | — | — | — | 3 | 11 | |
Swell 3 Height (m) Direction Period (s) | W 13 | W 12 | W 11 | — | — | — | — | — | W 14 | — | — | — | — | — | W 14 | W 12 | — | — | — | — | — |
3 | 3 | 9 | — | — | — | — | — | 33 | — | — | — | — | — | 4 | 12 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNW 2 | — | — | NW 3 | — | NW 3 | NW 3 | — | — | — | S 2 | W 8 | WNW 7 | — | WNW 8 | N 3 |
— | — | — | — | — | 1 | — | — | 2 | — | 2 | 3 | — | — | — | 1 | 111 | 369 | — | 184 | 6 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 22 | 22 | 9 | 68 | 0 | 0 | 226 | 9 | 0 | 22 | 0 | 0 | 22 | 0 | 256 | 369 | 22 | 159 | 9 | |
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.










