- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Sion sur l'Ocean surfForecast / Vendee / France
12 Day Weather and Surf, issued 1 pm Tuesday 16 Sep 2025 CEST
Best Forecast Surf Conditions for Sion sur l'Ocean this week:
The surf forecast for Sion sur l'Ocean over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 16) at 11PM. The primary swell is predicted to be 1.5m and 12s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Sion sur l'Ocean in the next 12 days are 1.6m 12s and forecast to arrive on Tuesday (Sep 16) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Friday (Sep 19) at 11AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 16th Sep) | 5ft (1.5m) 12s |
| Best Surf | 11PM (Tue 16th Sep) | 5ft (1.5m) 12s |
| Most Powerful | 8PM (Tue 16th Sep) | 5ft (1.6m) 12s |
Table - best surf conditions forecast for Sion sur l'Ocean over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 26°C on Thu night, min 16°C on Tue afternoon). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 6mm), mostly falling on Fri night. Warm (max 25°C on Fri afternoon, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||
Tue 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 11 | 10 | 12 | 12 | 12 | 11 | 10 | 10 | 10 | 10 | 9 | 6 | 8 | 8 | 6 | 6 | 6 | 5 | 5 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 957 | 538 | 229 | 131 | 393 | 681 | 464 | 338 | 254 | 202 | 190 | 154 | 110 | 151 | 432 | 217 | 133 | 83 | 86 | 48 | 27 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- off | cross- off | cross | cross- on | cross- off | glass | cross- off | cross- off | cross- off | glass | cross- off | cross | on | on | cross- on | cross | cross | cross- on | cross- on | cross- on | ||
High Tide / height (m) | 2:36AM 3.29 | 2:57PM 3.61 | 3:33AM 3.56 | 3:49PM 3.90 | 4:17AM 3.81 | 4:30PM 4.14 | 4:53AM 4.00 | 5:03PM 4.30 | 5:22AM 4.13 | 5:31PM 4.39 | 5:46AM 4.21 | 5:55PM 4.40 | 6:08AM 4.24 | ||||||||||
Low Tide / height (m) | 7:13PM 1.20 | 7:45AM 1.28 | 8:32PM 1.00 | 8:55AM 1.02 | 9:31PM 0.71 | 9:47AM 0.70 | 10:17PM 0.42 | 10:30AM 0.42 | 10:56PM 0.20 | 11:09AM 0.21 | 11:31PM 0.06 | 11:45AM 0.09 | 12:05AM 0.02 | 12:19PM 0.07 | |||||||||
Tue 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||||
| Sunrise | - | - | 7:47 | - | - | 7:48 | - | - | 7:50 | - | - | 7:50 | - | - | 7:52 | - | - | 7:52 | - | - | 7:54 | ||
| Sunset | 8:17 | - | - | 8:15 | - | - | 8:14 | - | - | 8:12 | - | - | 8:09 | - | - | 8:07 | - | - | 8:06 | - | - | ||
 |  |  | |  | | | | |  |  |  |  | | | | | | | | | |||
Rain (mm) | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | - | 1 | - | - | - | 1 | ||
| Temp. °C | 17 | 16 | 16 | 18 | 17 | 18 | 24 | 26 | 22 | 25 | 23 | 19 | 20 | 18 | 15 | 16 | 16 | 13 | 17 | 16 | 12 | ||
| Feels °C (?) | 16 | 15 | 15 | 17 | 16 | 16 | 22 | 23 | 18 | 22 | 22 | 17 | 18 | 17 | 12 | 14 | 14 | 7 | 11 | 9 | 6 | ||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Vendee
The wind is still cross-on at Sion sur l'Ocean (light winds from the W.(Wind varies from 240 to 310 degs) at La Roche sur-Yon Aerodrome/Les Ajoncs Airport 47 km from Sion sur l'Ocean). A 1.8m groundswell from the W
47 km away, 1 h 19 min ago
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sion sur l'Ocean surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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 12 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.
Nearest