Surf Forecasts:
La Tranche sur Mer surf forecast from 12 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 2PM (local time) - 3.5ft (1.1m), 8s period, WNW swell with offshore winds.
- Most powerful swell: Friday 18 Sep, 11PM (local time) - 3ft (0.9m), 14s period, W swell with 307 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 8PM (local time) - 1.5ft (0.5m), 8s period with W swell.
Best Forecast Surf Conditions for La Tranche sur Mer this week:
The surf forecast for La Tranche sur Mer over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 12) at 8PM. The primary swell is predicted to be 0.5m and 8s period with a secondary swell of 0.2m and 16s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at La Tranche sur Mer in the next 16 days are 0.9m 14s and forecast to arrive on Friday (Sep 18) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Tuesday (Sep 15) at 11PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sat 12th Sep) | 1.5ft (0.5m) 8s |
| Best Surf | 2PM (Wed 16th Sep) | 3.5ft (1.1m) 8s |
| Most Powerful | 11PM (Fri 18th Sep) | 3ft (0.9m) 14s |
Table - best surf conditions forecast for La Tranche sur Mer over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down this stretch of coast for the next couple of weeks.
It’s pretty thin for La Tranche sur Mer. The waves barely reach 2 to 3 feet for the first week and a half, and the conditions are often messy or just plain ordinary. The water temp is sitting around 71°, which feels a touch warmer than normal for this time of year, so the wetsuit might feel a little more comfortable than usual.
The only real window pops up on Monday the 21st and Tuesday the 22nd of September. The standout is Monday afternoon at La Tranche sur Mer (beach/jetty). The swell pushes up to about 3 ft from the west with a long period of 14 seconds, which will give it some shape and punch – the combined energy is 275 (moderate). The wind is light offshore from the north-northeast, so expect clean, glassy faces. This is your best bet if you’re looking for a genuine surf. Just a heads up, this long-period swell might break a bit straight at a beach setup, but for the size it should be okay. Crowds are possible from time to time here.
The next morning, Tuesday the 22nd, has a tiny 2 ft west swell but offshore NW wind at 9 mph, giving clean little lines. Nothing exciting, but better than the rest of the week which is mostly flat or blown out.
First week? Saturday the 12th is near flat, Sunday the 13th bumps a little with a glassy morning but the swell is only 1 ft. Not worth the paddle. Wednesday the 16th has a bit more size, around 3 to 4 ft, but the wind is howling onshore or cross-offshore most of the time. The afternoon of the 16th has a fresh offshore breeze, so the waves might be clean but small.
The second week stays tiny, most days seeing 1 to 2 ft, with winds often cross or onshore, giving it a messy look. A few glassy moments but hardly any swell to ride.
For kite surfers, the stronger cross-offshore winds on days with a bit of wave energy, like the 16th and 17th, could be more interesting than for paddle surfing, especially with the small, choppy swell.
So, plain and simple – for the next 16 days, you’ve got one real shot: Monday the 21st afternoon. The rest is mostly flat and ordinary.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 18°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu night. Warm (max 25°C on Tue afternoon, min 13°C on Wed night). Winds decreasing (fresh winds from the N on Tue night, light winds from the NW by Thu morning). | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 8 | W 8 | W 14 | W 10 | W 11 | W 11 | W 10 | W 10 | W 9 | W 9 | W 8 | WNW 7 | W 8 | W 8 | W 10 | W 11 | W 11 | W 10 | W 16 | W 15 | W 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 33 | 45 | 60 | 47 | 123 | 82 | 71 | 47 | 41 | 24 | 36 | 154 | 127 | 173 | 120 | 185 | 108 | 68 | 45 | 215 | 294 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | glassy | cross-off | cross-off | cross-on | cross-off | cross-on | on | cross-off | off | cross-off | off | cross-off | off | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 6:25PM4.70m | 6:40AM4.44m | 6:51PM4.54m | 7:02AM4.31m | 7:14PM4.30m | 7:22AM4.14m | 7:35PM4.02m | 7:44AM3.92m | 7:59PM3.71m | 8:10AM3.65m | 8:27PM3.38m | 8:42AM3.36m | 9:04PM3.05m | ||||||||
Low Tide | 12:08PM-0.27m | 00:31AM-0.30m | 12:47PM-0.22m | 1:08AM-0.14m | 1:26PM-0.05m | 1:46AM0.13m | 2:04PM0.23m | 2:24AM0.47m | 2:44PM0.59m | 3:03AM0.85m | 3:28PM0.97m | 3:48AM1.23m | 4:18PM1.32m | 4:42AM1.54m | |||||||
 | |  | | | | | | | | |  | | | |  | |  | | | | |
 | 7:39 | — | — | 7:39 | — | — | 7:41 | — | — | 7:43 | — | — | 7:43 | — | — | 7:45 | — | — | 7:46 | — | — |
 | — | 8:23 | — | — | 8:22 | — | — | 8:20 | — | — | 8:17 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 19 | 22 | 22 | 21 | 24 | 23 | 22 | 28 | 27 | 24 | 25 | 21 | 16 | 19 | 18 | 14 | 18 | 18 | 14 | 18 | 17 |
Feels °C | 19 | 19 | 19 | 21 | 20 | 19 | 20 | 26 | 24 | 22 | 23 | 17 | 13 | 15 | 13 | 12 | 13 | 15 | 12 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 16 | W 10 | W 10 | W 11 | W 11 | W 10 | W 10 | W 9 | W 9 | W 12 | W 11 | W 8 | — | W 10 | W 11 | W 11 | W 10 | W 9 | W 15 | W 14 |
| kJ | 33 | 5 | 47 | 46 | 123 | 82 | 71 | 47 | 41 | 24 | 11 | 21 | 127 | — | 120 | 185 | 108 | 68 | 41 | 215 | 294 |
Swell 2 Height (m) Direction Period (s) | — | W 16 | W 14 | W 12 | — | — | — | — | — | W 13 | W 12 | — | W 11 | — | W 12 | — | — | WNW 4 | W 16 | WNW 9 | — |
| kJ | — | 5 | 34 | 47 | — | — | — | — | — | 3 | 11 | — | 21 | — | 46 | — | — | 1 | 45 | 92 | — |
Swell 3 Height (m) Direction Period (s) | — | — | W 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 12 | — | — |
| kJ | — | — | 60 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — |
Wind waves Height (m) Direction Period (s) | — | W 8 | NNW 3 | — | — | NNW 3 | — | — | — | SSE 2 | W 8 | WNW 7 | — | W 8 | — | — | NW 3 | — | — | WNW 9 | — |
| kJ | — | 45 | 1 | — | — | 1 | — | — | — | 1 | 36 | 154 | — | 173 | — | — | 2 | — | — | 26 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 263 | 16 | 0 | 16 | 3 | 1 | 0 | 1 | 96 | 483 | 209 | 16 | 209 | 20 | 0 | 330 | 0 | 0 | 16 | 16 |
Best forecast wave conditions in Vendee | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
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Information about the La Tranche sur Mer Surf forecast
The above surf forecast table for La Tranche sur Mer provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at La Tranche sur Mer can be found by selecting the local surf guide option on the grey menu. Our La Tranche sur Mer 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 (La Tranche sur Mer) 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 La Tranche sur Mer 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.
Are you planning a holiday in Vendee? If you are looking for accommodation near La Tranche sur Mer, camping, hotels and holiday cottages in Vendee, consider staying in La Pallice which is 29 km (18 miles) away. Other places in and around Vendee where you can find information about places to rent, and car hire include Les Sables-d'Olonne which is 30 km (19 miles) away, La Rochelle, La Roche-sur-Yon and Marans.
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