Surf Forecasts:
La Tranche sur Mer surf forecast from 6 Sep 2026:
- Best quality surf: Monday 7 Sep, 8PM (local time) - 3.5ft (1.1m), 13s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 3.5ft (1.1m), 13s period, WSW swell with 437 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 5AM (local time) - 1ft (0.3m), 18s period with WSW 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 Monday (Sep 07) at 5AM. The primary swell is predicted to be 0.3m and 18s period with a secondary swell of 0.4m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at La Tranche sur Mer in the next 16 days are 1.1m 13s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Sep 09) at 2AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 7th Sep) | 1ft (0.3m) 18s |
| Best Surf | 8PM (Mon 7th Sep) | 3.5ft (1.1m) 13s |
| Most Powerful | 8PM (Mon 7th Sep) | 3.5ft (1.1m) 13s |
Table - best surf conditions forecast for La Tranche sur Mer over the next 16 days.
The Lowdown
Alright my friends, Rusty here. Let’s break down the next couple of weeks for La Tranche sur Mer.
It’s a slow start, no doubt about it. The first several days are pretty flat and ordinary. The water is about 21°, which is a touch warmer than usual for this time of year, so that’s a nice little bonus.
There’s a real gap at the beginning. Sunday 6th and Monday 7th are a bust. Monday afternoon brings a tiny 0.9m WSW swell, but the wind is cross-off and the combined energy is only 271 (moderate) – it’s still just marginal. Tuesday 8th is worse with a fresh 35 km/h cross-shore wind kicking up lumpy chop.
The first real chance to get wet comes Wednesday 9th morning. That’s the best of the first week. We’ve got a clean 1.0m west swell, period of 9 seconds, and a gentle offshore breeze from the northwest. The combined energy is 153 (weak to moderate). It’s not big, but it’ll be clean and surfable. The afternoon stays clean with a moderate offshore. Thursday 10th is glassy in the morning with 0.6m, but the energy is weak (57). It’s surfable, but very ordinary.
Friday 11th morning is another glassy one, 0.6m from the west, 10-second period, with a combined energy of 125 (moderate). Small but clean. The rest of the week is more of the same – small, clean, but weak.
The standout, the one you need to plan for, is Wednesday 16th September afternoon. That’s the day. The swell bumps up to 0.9m from the WNW with a 10-second period, and the combined energy is a solid 293 (moderate). The wind is a gentle offshore from the WNW. That’s a recipe for good, clean surf at La Tranche. This is the best bet of the whole 16 days.
After that, it fades away. Thursday 17th onwards is back to tiny swells (0.4ft to 0.7ft) with mostly offshore or cross-off winds, but the energy is low (under 100 most of the time). It’s surfable, but nothing special.
So, save your energy for Wednesday 16th September afternoon. That’s the one.
Catch you in the water,
Rusty
Short Range ForecastSome drizzle, heaviest during Tue night. Warm (max 27°C on Sun afternoon, min 15°C on Tue night). Winds increasing (light winds from the W on Mon morning, strong winds from the NW by Tue night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Wed afternoon, min 15°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 11 | W 10 | W 10 | WSW 15 | WSW 13 | WSW 12 | WSW 11 | W 10 | WSW 9 | W 9 | W 9 | W 8 | W 8 | W 8 | W 7 | W 10 | WSW 10 | WSW 8 | W 8 | W 8 | W 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 57 | 50 | 28 | 174 | 257 | 236 | 198 | 177 | 177 | 153 | 162 | 46 | 46 | 32 | 16 | 71 | 154 | 112 | 58 | 42 | 27 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | off | off | off | off | glassy | cross-off | cross-off | glassy | cross-off | cross-off | cross | cross-off | cross-off |
High Tide | 1:59PM3.41m | 2:46AM3.45m | 3:08PM3.78m | 3:43AM3.79m | 3:59PM4.16m | 4:29AM4.09m | 4:43PM4.48m | 5:09AM4.32m | 5:21PM4.69m | 5:44AM4.45m | 5:55PM4.76m | 6:14AM4.49m | 6:25PM4.70m | ||||||||
Low Tide | 7:19PM1.05m | 7:52AM1.10m | 8:35PM0.78m | 9:00AM0.77m | 9:36PM0.40m | 9:56AM0.39m | 10:27PM0.05m | 10:44AM0.06m | 11:11PM-0.21m | 11:27AM-0.17m | 11:52PM-0.33m | 12:08PM-0.27m | 00:31AM-0.30m | ||||||||
 |  |  | | | | |  |  | | | | | |  | | | | | | | |
 | 7:31 | — | — | 7:31 | — | — | 7:33 | — | — | 7:35 | — | — | 7:35 | — | — | 7:37 | — | — | 7:39 | — | — |
 | — | 8:36 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:23 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 27 | 23 | 20 | 21 | 20 | 19 | 20 | 19 | 17 | 19 | 18 | 16 | 19 | 18 | 17 | 19 | 19 | 19 | 23 | 21 |
Feels °C | 23 | 26 | 22 | 21 | 21 | 20 | 18 | 17 | 15 | 14 | 14 | 14 | 15 | 16 | 14 | 18 | 18 | 16 | 19 | 20 | 17 |
Swell 1 Height (m) Direction Period (s) | W 11 | W 10 | W 10 | WSW 15 | WSW 13 | WSW 12 | WSW 11 | W 10 | WSW 9 | W 9 | — | W 8 | W 8 | W 12 | W 7 | W 10 | W 10 | WSW 8 | W 8 | W 8 | W 7 |
| kJ | 57 | 50 | 28 | 174 | 257 | 236 | 198 | 177 | 177 | 153 | — | 46 | 46 | 3 | 16 | 71 | 16 | 112 | 58 | 42 | 27 |
Swell 2 Height (m) Direction Period (s) | E 3 | — | SW 18 | W 4 | W 9 | WSW 5 | — | — | — | — | — | W 10 | W 10 | WSW 7 | W 8 | WNW 10 | — | — | — | W 12 | W 14 |
| kJ | 2 | — | 13 | 10 | 14 | 8 | — | — | — | — | — | 31 | 8 | 17 | 5 | 34 | — | — | — | 3 | 16 |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 9 | — | — | — | — | — | — | — | — | W 13 | W 12 | W 11 | W 8 | — | — | — | W 16 | W 11 |
| kJ | — | — | — | 14 | — | — | — | — | — | — | — | — | 3 | 3 | 2 | 20 | — | — | — | 5 | 9 |
Wind waves Height (m) Direction Period (s) | — | — | WSW 3 | — | W 5 | — | WSW 11 | — | NNW 4 | N 4 | W 9 | — | — | W 8 | — | WSW 2 | WSW 10 | — | — | — | NW 3 |
| kJ | — | — | 2 | — | 14 | — | 40 | — | 14 | 2 | 162 | — | — | 32 | — | 1 | 154 | — | — | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 294 | 196 | 0 | 35 | 0 | 35 | 330 | 210 | 0 | 0 | 0 | 0 | 29 | 55 | 0 | 16 | 0 | 1 | 263 | 3 |
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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