
Surf Forecasts:
Sion sur l'Ocean surf forecast from 4 Aug 2026:
- Most powerful swell: Wednesday 5 Aug, 11PM (local time) - 4ft (1.2m), 8s period, W swell with 177 kJ wave energy.
Best Forecast Surf Conditions for Sion sur l'Ocean this week:
The most powerful waves expected at Sion sur l'Ocean in the next 16 days are 1.2m 8s and forecast to arrive on Wednesday (Aug 05) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Friday (Aug 07) at 2PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Wed 5th Aug) | 4ft (1.2m) 8s |
Table - best surf conditions forecast for Sion sur l'Ocean over the next 16 days.
Short Range ForecastMostly dry. Warm (max 21°C on Tue morning, min 14°C on Thu morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 30°C on Sun afternoon, min 15°C on Fri morning). Winds decreasing (fresh winds from the NW on Fri afternoon, calm by Sun afternoon). | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
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 | WSW 7 | WSW 7 | W 7 | W 7 | WNW 7 | WNW 4 | WNW 5 | W 10 | W 9 | NW 4 | W 9 | W 9 | W 10 | WNW 10 | WNW 9 | NW 4 | NNW 4 | WNW 4 | WNW 6 |
Wave Graph | |||||||||||||||||||||
48 | 138 | 111 | 75 | 91 | 86 | 54 | 19 | 31 | 7 | 7 | 7 | 6 | 6 | 19 | 18 | 16 | 29 | 21 | 38 | 36 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross | cross | on | cross | cross-off | on | cross-off | cross-off | glassy | on | on | cross-on | cross |
High Tide | 8:32AM3.88m | 8:50PM3.99m | 9:14AM3.74m | 9:36PM3.76m | 10:06AM3.56m | 10:38PM3.51m | 11:21AM3.40m | 00:15AM3.34m | 1:13PM3.39m | 2:11AM3.41m | 2:46PM3.63m | 3:28AM3.67m | 3:51PM3.98m | 4:25AM3.94m | |||||||
Low Tide | 3:18PM0.58m | 3:45AM0.61m | 4:06PM0.77m | 4:36AM0.83m | 5:03PM0.96m | 5:37AM1.02m | 6:13PM1.07m | 6:50AM1.11m | 7:31PM1.02m | 8:06AM1.01m | 8:46PM0.78m | 9:14AM0.76m | 9:50PM0.44m | ||||||||
6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | |
— | — | 9:36 | — | — | 9:34 | — | — | 9:32 | — | — | 9:30 | — | — | 9:30 | — | — | 9:28 | — | — | 9:27 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 21 | 20 | 19 | 18 | 17 | 18 | 19 | 19 | 23 | 22 | 25 | 27 | 27 | 24 | 30 | 22 | 23 | 23 | 22 |
Feels °C | 20 | 20 | 21 | 19 | 17 | 15 | 14 | 13 | 15 | 16 | 18 | 17 | 21 | 22 | 21 | 20 | 27 | 18 | 21 | 19 | 21 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 9 | WSW 7 | W 7 | W 7 | WNW 7 | W 10 | WNW 5 | WNW 5 | W 9 | NW 4 | WNW 5 | W 9 | W 10 | WNW 10 | WNW 9 | WNW 9 | WNW 8 | — | WNW 6 |
48 | 138 | 2 | 75 | 91 | 86 | 54 | 18 | 31 | 2 | 7 | 7 | 5 | 6 | 19 | 18 | 16 | 8 | 7 | — | 36 | |
Swell 2 Height (m) Direction Period (s) | — | W 9 | — | W 9 | WNW 10 | W 11 | W 10 | — | W 10 | W 6 | — | W 9 | W 9 | W 12 | W 6 | WNW 4 | W 6 | — | W 8 | — | W 11 |
— | 6 | — | 14 | 9 | 9 | 8 | — | 8 | 6 | — | 7 | 6 | 3 | 1 | 2 | 1 | — | 1 | — | 2 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 10 | — | W 6 | W 9 | — | — | W 6 | W 6 | — | — | — | W 11 |
— | — | — | — | — | — | — | — | — | 7 | — | 1 | 6 | — | — | 1 | 1 | — | — | — | 2 | |
Wind waves Height (m) Direction Period (s) | WSW 3 | — | WSW 7 | — | — | NW 5 | — | WNW 4 | NNE 3 | NE 3 | NW 3 | NNE 3 | NE 3 | NW 2 | NNW 4 | NNE 3 | NW 2 | NW 4 | NNW 4 | WNW 4 | NNE 4 |
2 | — | 111 | — | — | 35 | — | 19 | 6 | 2 | 6 | 6 | 2 | 1 | 7 | 2 | 1 | 29 | 21 | 38 | 13 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 41 | 219 | 254 | 41 | 274 | 28 | 28 | 369 | 1 | 170 | 714 | 174 | 255 | 208 | 207 | 219 | 412 | 207 | 207 | 369 | 1 |
Best forecast wave conditions in Vendee | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Sion sur l'Ocean Surf forecast
The above surf forecast table for Sion sur l'Ocean provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sion sur l'Ocean can be found by selecting the local surf guide option on the grey menu. Our Sion sur l'Ocean 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 (Sion sur l'Ocean) 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 Sion sur l'Ocean 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 Sion sur l'Ocean, camping, hotels and holiday cottages in Vendee, consider staying in Challans which is 17 km (11 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 28 km (17 miles) away, La Roche-sur-Yon, Nantes Aeroport Atlantique and Coueron.











