
Surf Forecasts:
Les Dunes surf forecast from 20 Jul 2026:
- Most powerful swell: Monday 27 Jul, 8AM (local time) - 4ft (1.2m), 6s period, W swell with 91 kJ wave energy.
Best Forecast Surf Conditions for Les Dunes this week:
The most powerful waves expected at Les Dunes in the next 16 days are 1.2m 6s and forecast to arrive on Monday (Jul 27) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Wednesday (Jul 22) at 11PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Mon 27th Jul) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Les Dunes over the next 16 days.
The Lowdown
Alright, let’s get into it. This is Rusty, and I’m looking at the next sixteen days for Les Dunes.
Alright, straight up, don’t get your hopes up too high. This stretch is a tough one. We’ve got a whole lot of flat days and poor conditions to sit through before we see anything that’s actually worth paddling out for. The first recommendation doesn’t pop up until the very end of the run, so we’re looking at a long dry spell.
For the first week and a half, it’s a real grind. The water temp is sitting at 71°F which is much warmer than normal for this time of year, a full 4°F above average. That’s notable, but it doesn’t help the surf. We’ve got days of tiny, weak swell with barely any energy, mostly under 10 (5 units of energy) and a whole lot of wind. The wind is mostly offshore from the NE, which is clean, but with swell heights of 0.3ft to 0.7ft, there’s nothing to ride. It’s a total washout. Even when the swell tries to pick up a little around the 25th and 26th of July, it’s short-period, choppy, and the wind is howling cross-shore or onshore. The wave energy gets up to 50-85 (moderate energy) but the quality is just poor.
We finally get a little glimmer of hope on the morning of the 28th of July. The swell is 3ft from the WNW with a period of 10 seconds, and the combined energy is 129 (moderate energy). The wind is light from the N, giving us a clean, cross-offshore breeze. The notes say "surfable waves but very ordinary conditions," and honestly, that’s the best we’ve got up to this point. It’s not a standout, just a slight improvement.
The real standout, the only one worth marking on the calendar, is the morning of the 1st of August. The forecast shows a 4ft swell from the west with an 8-second period and a combined energy of 160 (moderate energy). The wind is light and offshore from the ENE, which is a major positive for clean waves. The rating is high, and the conditions are described as "wind and tide favorable." However, the note says the swell might be a bit too big for this break. For a beginner spot like Les Dunes, 4ft is pushing it, but for a competent surfer, it could be the best session in the whole window. Keep in mind the crowd profile says "sometimes," so you might have some company but it won’t be a circus.
After that, it falls away again. The 31st of July morning also has some life with a 2ft WNW swell, period of 9 seconds, and a moderate energy of 152, but the wind is gentler. It’s just not as clean as the 1st of August.
So, to sum it up: There’s a massive gap of nearly two weeks of mostly flat, poor conditions. The only two real windows are the morning of the 28th of July for a mediocore session, and the morning of the 1st of August as the clear best bet of the entire forecast. That August 1st window is the one to aim for if you can, but because it’s so far out, treat it as promising but not locked in.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 30°C on Tue night, min 14°C on Mon morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sat night. Warm (max 31°C on Thu night, min 17°C on Sat morning). Winds increasing (light winds from the WNW on Fri afternoon, strong winds from the WNW by Sat night). | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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 9 | W 12 | W 11 | W 11 | W 11 | W 10 | W 10 | W 10 | NW 5 | NW 5 | W 9 | W 9 | W 9 | W 9 | NW 4 | WNW 5 | WNW 4 | WNW 6 | WNW 5 | WNW 4 | W 5 |
Wave Graph | |||||||||||||||||||||
2 | 3 | 10 | 9 | 9 | 8 | 8 | 8 | 21 | 7 | 6 | 6 | 6 | 6 | 6 | 18 | 20 | 81 | 23 | 31 | 71 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | cross-off | off | cross-off | off | off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-on | cross | cross | cross-off |
High Tide | 9:50AM3.56m | 10:09PM3.63m | 10:40AM3.34m | 11:04PM3.33m | 11:43AM3.17m | 00:18AM3.11m | 1:01PM3.09m | 1:41AM3.03m | 2:15PM3.13m | 2:51AM3.09m | 3:15PM3.26m | 3:44AM3.22m | 4:02PM3.44m | 4:26AM3.39m | |||||||
Low Tide | 3:49PM0.67m | 4:19AM0.78m | 4:40PM0.96m | 5:10AM1.07m | 5:37PM1.21m | 6:07AM1.29m | 6:41PM1.36m | 7:12AM1.40m | 7:50PM1.37m | 8:18AM1.36m | 8:54PM1.25m | 9:17AM1.21m | 9:48PM1.05m | ||||||||
6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | |
— | — | 9:52 | — | — | 9:52 | — | — | 9:51 | — | — | 9:50 | — | — | 9:49 | — | — | 9:47 | — | — | 9:45 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 3 | — | — |
Temp °C | 21 | 29 | 29 | 21 | 29 | 30 | 24 | 30 | 30 | 24 | 30 | 31 | 26 | 28 | 24 | 20 | 21 | 19 | 20 | 21 | 20 |
Feels °C | 14 | 22 | 22 | 14 | 23 | 23 | 19 | 26 | 25 | 19 | 27 | 26 | 22 | 23 | 18 | 15 | 16 | 13 | 16 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | W 11 | W 11 | W 11 | W 10 | W 10 | W 10 | NW 5 | NW 5 | W 9 | NW 4 | WNW 4 | W 9 | W 8 | W 8 | NW 10 | W 10 | W 8 | WNW 11 | WNW 9 |
2 | 2 | 10 | 9 | 9 | 8 | 8 | 8 | 21 | 7 | 6 | 4 | 1 | 6 | 5 | 1 | 4 | 2 | 1 | 12 | 17 | |
Swell 2 Height (m) Direction Period (s) | NW 7 | W 12 | W 8 | NW 6 | — | — | NW 6 | — | W 10 | W 9 | — | W 9 | W 9 | — | — | W 11 | — | NW 9 | W 10 | W 9 | WNW 10 |
2 | 3 | 1 | 1 | — | — | 1 | — | 7 | 6 | — | 6 | 6 | — | — | 2 | — | 3 | 2 | 7 | 9 | |
Swell 3 Height (m) Direction Period (s) | W 7 | — | — | W 8 | — | — | NW 4 | — | — | — | — | — | — | — | — | — | — | W 13 | W 12 | — | — |
1 | — | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 3 | 3 | — | — | |
Wind waves Height (m) Direction Period (s) | NE 4 | NNE 3 | NNE 4 | NNE 4 | N 3 | NNE 4 | NE 3 | NNW 3 | NE 3 | ENE 3 | NW 2 | — | ESE 3 | WNW 2 | NW 4 | WNW 5 | WNW 4 | WNW 6 | WNW 5 | WNW 4 | W 5 |
17 | 3 | 16 | 18 | 3 | 13 | 4 | 3 | 5 | 1 | 1 | — | 1 | 1 | 6 | 18 | 20 | 81 | 23 | 31 | 71 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 264 | 355 | 264 | 238 | 355 | 231 | 264 | 355 | 231 | 264 | 388 | 264 | 605 | 1013 | 1099 | 1289 | 1338 | 656 | 433 | 431 | 226 |
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.










