Surf Forecasts:
Tanchet surf forecast from 8 Aug 2026:
- Best quality surf: Friday 14 Aug, 5AM (local time) - 3.5ft (1.0m), 10s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 14 Aug, 5AM (local time) - 3.5ft (1.0m), 10s period, W swell with 200 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 2AM (local time) - 2ft (0.6m), 9s period with W swell.
Best Forecast Surf Conditions for Tanchet this week:
The surf forecast for Tanchet over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 13) at 2AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.1m and 5s. Another secondary swell of 0.4m and 3s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Tanchet in the next 16 days are 1.0m 10s and forecast to arrive on Friday (Aug 14) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Thursday (Aug 13) at 5AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 13th Aug) | 2ft (0.6m) 9s |
| Best Surf | 5AM (Fri 14th Aug) | 3.5ft (1.0m) 10s |
| Most Powerful | 5AM (Fri 14th Aug) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for Tanchet over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about the surf for the next couple of weeks.
First up, the water temp is sitting right around 69°, which is bang on normal for this time of year. No surprises there.
Honestly, we’ve got a long stretch of nothing special to kick things off. There’s a gap right from the start with no real surf on offer for the first week. The swell is tiny, the wind is messy, and even when the conditions clean up, there’s just not enough wave to get excited about. It’s a bit of a flat spell, but it won’t last forever.
The first real glimmer of hope comes around Thursday morning, August 15th, at Tanchet. This is a reef break, inconsistent, and it can get a few people around, so expect some company. We’re looking at a weak 3ft swell from the WNW, with a short period of 8 seconds. The energy is still low, only about 105 (moderate energy). The wind is from the NNE at 15 mph, blowing cross-offshore, which will keep things clean. It’s surfable, but very ordinary—just enough to get a wet suit on and stretch the arms.
If you’re after the best of the best in this entire outlook, you’re looking at Wednesday morning, August 19th, again at Tanchet. The swell bumps up to 4ft from the WNW, with a period of 8 seconds, and the combined energy hits 212 (moderate wave energy). The wind is light from the NW at 15 mph, a gentle cross-shore, so the surface will be a little lumpy but not blown out. It’s marginal, but it’s the biggest, most energetic window we’ve got. Keep your expectations in check—this isn’t a classic, but it’s the pick of a pretty quiet bunch.
After that, things drop off again. The rest of the run into the 23rd shows small, weak swells with mostly clean or cross-off winds, but nothing that’s going to get the heart racing. The 23rd of August Sunday morning has a clean 2ft with 20 mph offshore wind from the NE, but it’s just not enough wave to call it a standout.
So, bottom line: a long dry spell, then a couple of small, ordinary windows mid-month, with the 19th being the best of a very average lot. The forecast can always change, so don’t write it off completely.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun morning. Warm (max 28°C on Sat afternoon, min 20°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Thu afternoon, min 21°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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 9 | WNW 10 | WNW 10 | WNW 9 | WSW 7 | WSW 7 | WSW 7 | WNW 9 | WSW 7 | WNW 8 | WNW 10 | W 11 | W 10 | W 9 | W 9 | W 9 | W 10 | W 9 | W 9 | WNW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7 | 2 | 10 | 18 | 17 | 10 | 16 | 17 | 15 | 9 | 13 | 18 | 37 | 49 | 58 | 79 | 83 | 96 | 85 | 81 | 74 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | glassy | cross | cross-off | off | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-off | cross | cross | cross | cross | cross | cross-off |
High Tide | 1:20PM3.36m | 2:13AM3.39m | 2:47PM3.61m | 3:27AM3.64m | 3:51PM3.95m | 4:25AM3.92m | 4:43PM4.29m | 5:13AM4.15m | 5:29PM4.54m | 5:56AM4.30m | 6:12PM4.68m | 6:36AM4.34m | 6:51PM4.67m | ||||||||
Low Tide | 7:23PM1.01m | 7:58AM1.01m | 8:38PM0.78m | 9:06AM0.76m | 9:42PM0.45m | 10:04AM0.44m | 10:37PM0.12m | 10:54AM0.15m | 11:25PM-0.13m | 11:40AM-0.06m | 00:09AM-0.26m | 12:23PM-0.16m | 00:51AM-0.25m | ||||||||
 |  |  |  | |  | | | | | | | | | | | | | | | | |
 | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — |
 | — | — | 9:28 | — | — | 9:27 | — | — | 9:24 | — | — | 9:23 | — | — | 9:22 | — | — | 9:21 | — | — | 9:19 |
mm | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 28 | 25 | 22 | 24 | 23 | 25 | 25 | 25 | 23 | 25 | 24 | 28 | 29 | 26 | 29 | 30 | 25 | 25 | 27 | 26 |
Feels °C | 21 | 23 | 21 | 22 | 22 | 20 | 23 | 22 | 23 | 23 | 24 | 23 | 27 | 27 | 24 | 28 | 27 | 21 | 22 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | NW 3 | NW 3 | WNW 9 | WSW 7 | NW 5 | WSW 7 | WNW 4 | WNW 5 | WNW 8 | WNW 10 | W 11 | W 10 | W 9 | W 9 | W 9 | W 10 | W 9 | W 9 | WNW 6 |
| kJ | 7 | 2 | 1 | 2 | 17 | 10 | 8 | 17 | 13 | 5 | 13 | 18 | 37 | 49 | 58 | 79 | 83 | 96 | 85 | 81 | 74 |
Swell 2 Height (m) Direction Period (s) | NW 6 | NW 6 | WNW 10 | WNW 10 | W 6 | WNW 9 | WSW 7 | WNW 9 | WSW 7 | WSW 7 | WSW 7 | WSW 6 | WNW 8 | — | W 5 | WNW 4 | W 12 | WNW 4 | WNW 6 | — | W 9 |
| kJ | 1 | 1 | 10 | 18 | 3 | 8 | 16 | 16 | 10 | 9 | 4 | 4 | 6 | — | 1 | 1 | 3 | 12 | 21 | — | 57 |
Swell 3 Height (m) Direction Period (s) | — | W 6 | W 7 | W 6 | — | — | WNW 9 | — | WNW 9 | WNW 8 | W 10 | — | WSW 6 | — | — | W 13 | — | — | — | — | — |
| kJ | — | 1 | 1 | 3 | — | — | 8 | — | 15 | 7 | 8 | — | 3 | — | — | 3 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 3 | — | — | — | NW 3 | NW 4 | — | NW 4 | — | — | — | — | — | W 2 | NW 3 | — | WNW 3 | — | N 3 | NW 5 | — |
| kJ | 1 | — | — | — | 2 | 5 | — | 6 | — | — | — | — | — | 1 | 4 | — | 3 | — | 1 | 13 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 285 | 247 | 169 | 169 | 484 | 234 | 78 | 170 | 140 | 140 | 347 | 237 | 23 | 237 | 0 | 3 | 11 | 3 | 3 | 234 | 3 |
Best forecast wave conditions in Vendee | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
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Information about the Tanchet Surf forecast
The above surf forecast table for Tanchet provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Tanchet can be found by selecting the local surf guide option on the grey menu. Our Tanchet 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 (Tanchet) 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 Tanchet 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.
Tanchet is 3 km (2 miles) from the city of 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.
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