Surf Forecasts:
La Tranche sur Mer surf forecast from 15 Sep 2026:
- Best quality surf: Thursday 17 Sep, 5PM (local time) - 3.5ft (1.1m), 10s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 5PM (local time) - 4ft (1.2m), 16s period, W swell with 719 kJ wave energy.
- Next surfable swell (1★+): Wednesday 16 Sep, 11AM (local time) - 3ft (0.9m), 10s 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 Wednesday (Sep 16) at 11AM. The primary swell is predicted to be 0.9m and 10s period. 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 1.2m 16s and forecast to arrive on Friday (Sep 18) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Tuesday (Sep 15) at 8PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Wed 16th Sep) | 3ft (0.9m) 10s |
| Best Surf | 5PM (Thu 17th Sep) | 3.5ft (1.1m) 10s |
| Most Powerful | 5PM (Fri 18th Sep) | 4ft (1.2m) 16s |
Table - best surf conditions forecast for La Tranche sur Mer over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break it down for La Tranche sur Mer over the next couple of weeks in the old numbers.
It starts off quiet and stays that way for a long stretch. A few small windows of clean, small waves, but nothing that’ll get your heart pounding. No real standout sessions, but there’s a couple of mornings worth a look.
Wednesday morning, the 16th of September: Swell around 3ft from the W, 10-second period. Light offshore wind from the NNW, clean conditions. Combined energy is moderate (153), but the waves are small and ordinary. Crowds are possible.
Thursday morning, the 17th of September: Swell about 3ft from the W, 11-second period (a touch longer, better shape, longer lulls). Light W wind, clean. Combined energy moderate (144). Good for a beginner or a longboard.
Thursday afternoon on the 17th jumps up to 4ft from the W, 10-second period, but the wind is moderate cross-offshore. Combined energy is strong (388). The file hints it might be too big for this break at this exposed beach/jetty. Not the best.
Friday morning, the 18th of September: This is your best bet. Clean 3ft from the W, 10-second period, with a light N breeze creating cross-offshore conditions. Combined energy moderate (236). Small, clean, and fun. Crowds are possible.
The water’s a touch warmer than normal at around 71°, so that’s nice.
From Saturday the 19th onward, it’s messy. Swell stays small (2-3ft) with increasing cross-shore and onshore winds. Combined energy drops, and the wind creates lumpy chop. Not worth it.
This poor run lasts all the way through to the end of the month. Sunday morning, the 27th of September has a 3ft WSW swell with a very long 19-second period (combined energy a strong 744), but the wind is cross-shore from the ENE. That long-period groundswell will hit this beach break and close out or get messy. Skip it.
The last few days (28th to 30th) are flat or very small with weak energy. Wrap your board.
If you’re a beginner, Friday morning the 18th is the call. Otherwise, wait for a better system.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 24°C on Tue afternoon, min 13°C on Wed night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sun night, min 14°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 | WNW 8 | W 7 | W 10 | W 10 | W 12 | W 11 | W 10 | W 10 | W 10 | W 16 | W 14 | W 13 | W 13 | W 11 | W 10 | W 10 | W 10 | W 14 | W 14 | W 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 24 | 73 | 74 | 153 | 198 | 264 | 144 | 255 | 47 | 146 | 719 | 503 | 273 | 199 | 118 | 78 | 75 | 73 | 62 | 61 | 116 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross | off | cross-off | cross | off | cross |
High Tide | 7:35PM4.02m | 7:44AM3.92m | 7:59PM3.71m | 8:10AM3.65m | 8:27PM3.38m | 8:42AM3.36m | 9:04PM3.05m | 9:28AM3.05m | 10:06PM2.74m | 1:49PM2.98m | 2:30AM2.98m | 2:48PM3.24m | 3:17AM3.25m | ||||||||
Low Tide | 2:04PM0.23m | 2:24AM0.47m | 2:44PM0.59m | 3:03AM0.85m | 3:28PM0.97m | 3:48AM1.23m | 4:18PM1.32m | 4:42AM1.54m | 5:21PM1.59m | 11:19PM2.72m | 5:51AM1.72m | 6:38PM1.66m | 7:10AM1.67m | 7:56PM1.49m | |||||||
 | |  | | | |  | |  | | | |  | |  | | | | | | | |
 | 7:43 | — | — | 7:43 | — | — | 7:45 | — | — | 7:46 | — | — | 7:48 | — | — | 7:48 | — | — | 7:50 | — | — |
 | — | 8:17 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:06 | — |
mm | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 24 | 19 | 16 | 18 | 18 | 15 | 19 | 18 | 16 | 18 | 18 | 18 | 20 | 20 | 16 | 23 | 25 | 19 | 26 | 28 |
Feels °C | 22 | 19 | 14 | 14 | 14 | 13 | 14 | 15 | 15 | 14 | 14 | 16 | 17 | 18 | 20 | 15 | 20 | 22 | 15 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 12 | W 7 | W 10 | — | W 12 | W 11 | W 10 | W 10 | W 10 | W 16 | W 14 | W 13 | W 13 | W 11 | W 10 | W 10 | W 10 | W 10 | W 10 | W 13 |
| kJ | 24 | 11 | 74 | 153 | — | 264 | 144 | 255 | 47 | 146 | 719 | 503 | 273 | 199 | 118 | 78 | 75 | 73 | 30 | 30 | 116 |
Swell 2 Height (m) Direction Period (s) | W 13 | — | W 11 | — | — | W 12 | — | — | — | WSW 16 | — | — | — | — | — | — | — | W 16 | W 14 | W 14 | — |
| kJ | 3 | — | 21 | — | — | 73 | — | — | — | 90 | — | — | — | — | — | — | — | 5 | 62 | 61 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | WNW 8 | N 3 | — | W 10 | — | — | W 10 | WNW 5 | — | W 16 | — | — | W 13 | — | — | — | — | E 2 | — | NE 3 |
| kJ | — | 73 | 6 | — | 198 | — | — | 133 | 47 | — | 183 | — | — | 84 | — | — | — | — | 1 | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 330 | 29 | 0 | 209 | 1 | 0 | 35 | 0 | 0 | 35 | 16 | 35 | 35 | 0 | 1 | 0 | 1 | 1 | 0 | 1 |
Best forecast wave conditions in Vendee | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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