Le Sillon surf break

Le Sillon surfForecast / Brittany – Ile et Vilaine / France

information circle12 Day Weather and Surf, issued 7 pm Wednesday 10 Sep 2025 CEST
Forecast update in hr  min  s Forecast update imminent
Le Sillon surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Le Sillon sea temperature is
19.2° C
(Which is 2.1°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Le Sillon this week:

The most powerful waves expected at Le Sillon in the next 12 days are 3.0m 13s and forecast to arrive on Monday (Sep 15) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Sep 14) at 11AM.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5PM (Mon 15th Sep)10ft (3.0m) 13s

Table - best surf conditions forecast for Le Sillon over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Moderate rain (total 10mm), heaviest on Sat morning. Very mild (max 18°C on Thu afternoon, min 13°C on Thu night). Mainly fresh winds.

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Sun morning. Warm (max 22°C on Sun afternoon, min 13°C on Mon night). Winds decreasing (strong winds from the SW on Sun afternoon, moderate winds from the W by Tue afternoon).

Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wed
17
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
1
0
0
Swell
Height Map
Wave Height (m) & direction (?)
1.6
WNW
1.7
W
1.9
WNW
1.7
WNW
1.6
WNW
1.4
WNW
1.2
WNW
1.4
WNW
1.6
WNW
1.3
WNW
0.9
WNW
0.9
WNW
2.3
W
3
WNW
3
WNW
2.4
WNW
2
WNW
1.8
WNW
1.2
WNW
0.8
WNW
1.2
WNW
Period(s) (?)610111011111110101212910131313121211105
Wave
Graph
(?)Metric surfscale
Energy (?)1716218086595516903374185404461962071119253527501945115992352112572
Wind
(km/h)
30
WSW
35
WSW
35
WNW
30
WSW
25
WSW
25
W
30
SW
30
W
30
WNW
20
SSW
40
SW
45
SW
30
SW
40
WSW
40
W
30
WSW
25
W
20
WNW
25
SSW
50
SSW
55
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
crosscross-
on
crosscross-
on
cross-
on
crosscross-
on
oncross-
off
crosscrosscrosscrosscross-
on
crosscross-
on
oncross-
off
cross-
off
cross
High Tide
/ height (m)
9:56PM
13.16
10:16AM
12.77
10:35PM
12.76
10:55AM
12.24
11:15PM
11.99
11:36AM
11.41
12:00AM
10.94
12:24PM
10.37
12:55AM
9.76
1:27PM
9.32
2:17AM
8.74
3:09PM
8.65
4:20AM
8.52
5:01PM
8.92
Low Tide
/ height (m)
4:44AM
0.83
5:01PM
1.13
5:23AM
1.40
5:41PM
1.77
6:04AM
2.25
6:25PM
2.64
6:51AM
3.26
7:19PM
3.61
7:50AM
4.26
8:33PM
4.46
9:20AM
4.95
10:21PM
4.74
11:13AM
4.85
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wed
17
Sunrise-7:37--7:39--7:39--7:41--7:43--7:45--7:46-
Sunset--8:30--8:28--8:25--8:23--8:22--8:19--8:16
rain showers
rain showers
rain showers
rain showers
clear
part cloud
light rain
rain showers
rain showers
part cloud
light rain
part cloud
rain showers
clear
part cloud
clear
clear
part cloud
light rain
light rain
rain showers
Rain (mm)
1111--141-2-1-----411
Temp. °C171618171518181618171922191618171518171820
Feels °C (?)1191210101212111112131513810101114141011
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for Brittany - Ile et Vilaine

  1. weather stationWind Update The wind is still cross-off at Le Sillon (light winds from the S at Dinard/Pleurtuit Saint Malo Airport 11 km from Le Sillon). A 1.5m windswell from the WNW

    Le Sillon
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Actual: 47 min ago

18 km/h
S
Cross-Off
Please reload the page to see if there are any updates.

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 Le Sillon 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 Le Sillon Surf forecast

The above surf forecast table for Le Sillon provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Le Sillon can be found by selecting the local surf guide option on the grey menu. Our Le Sillon 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 (Le Sillon) 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 Le Sillon 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 Ile et Vilaine - Brittany? If you are looking for accommodation near Le Sillon, camping, hotels and holiday cottages in Ile et Vilaine - Brittany, consider staying in Saint Malo which is 2 km (1 miles) away. Other places in and around Ile et Vilaine - Brittany where you can find information about places to rent, and car hire include Cancale which is 9 km (6 miles) away, Granville, Saint-Brieuc and Saint Helier.

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