Sion sur l'Ocean Surf Break

Lat Long: 46.71° N 1.98° W

Sion sur l'Ocean Surf Forecast and Surf Report

Issued: 1 am 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sion sur l'Ocean sea temperature is
20.9° C
0.8° 

Sion sur l'Ocean surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


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 TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Wed 5th Aug)4ft (1.2m) 8s

Table - best surf conditions forecast for Sion sur l'Ocean over the next 16 days.


Short Range Forecast

Mostly dry. Warm (max 21°C on Tue morning, min 14°C on Thu morning). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly 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
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
W
8
1.1
W
8
1
WSW
7
0.9
WSW
7
1
W
7
0.9
W
7
0.8
WNW
7
0.9
WNW
4
0.8
WNW
5
0.2
W
10
0.2
W
9
0.5
NW
4
0.2
W
9
0.2
W
9
0.3
W
10
0.3
WNW
10
0.3
WNW
9
0.8
NW
4
0.8
NNW
4
1
WNW
4
0.7
WNW
6
Wave Graph
Metric surfscale
Energy kJ
48
138
111
75
91
86
54
19
31
7
7
7
6
6
19
18
16
29
21
38
36
Wind (km/h)
20
SW
20
WSW
20
WSW
15
W
20
WNW
25
NNE
15
NNW
30
WNW
25
NNE
15
NE
30
NW
25
NNE
10
E
15
WNW
5
NE
10
SSW
5
ESE
15
NW
10
NW
20
W
10
NE
Wind State
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
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
clear
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:50
6:52
6:52
6:54
6:56
6:56
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
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
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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.

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