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Le Sillon Surf Forecast
/ Brittany – Ile et Vilaine (5 surf breaks) /
Surf Forecasts:
Le Sillon surfForecast / Brittany – Ile et Vilaine / France
12 Day Weather and Surf, issued 6 am Sunday 26 Oct 2025 CET
Best Forecast Surf Conditions for Le Sillon this week:
The surf forecast for Le Sillon over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Oct 29) at 1AM. The primary swell is predicted to be 1.0m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Le Sillon in the next 12 days are 3.0m 9s and forecast to arrive on Monday (Oct 27) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Friday (Oct 31) at 4PM.
| Wave Type | Time (CET) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 29th Oct) | 3.5ft (1.0m) 8s |
| Best Surf | 1AM (Wed 29th Oct) | 3.5ft (1.0m) 8s |
| Most Powerful | 10AM (Mon 27th Oct) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Le Sillon over the next 12 days.
Short Range Forecast Light rain (total 6mm), mostly falling on Sun night. Very mild (max 15°C on Tue morning, min 11°C on Tue night). Winds decreasing (strong winds from the W on Sun night, light winds from the SSW by Tue night). | Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Fri night. Very mild (max 16°C on Wed afternoon, min 11°C on Wed night). Winds increasing (light winds from the S on Wed afternoon, fresh winds from the SSE by Thu afternoon). | ||||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 01 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 7 | 6 | 7 | 9 | 9 | 9 | 7 | 8 | 8 | 11 | 12 | 7 | 10 | 10 | 12 | 11 | 10 | 6 | 7 | 8 | 9 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 255 | 123 | 637 | 1387 | 716 | 336 | 280 | 191 | 125 | 47 | 107 | 29 | 75 | 56 | 179 | 263 | 102 | 136 | 108 | 56 | 29 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- off | cross- off | cross | cross | cross- off | off |
High Tide / height (m) | 9:40PM 10.50 | 9:55AM 10.42 | 10:14PM 9.91 | 10:31AM 9.85 | 10:55PM 9.27 | 11:17AM 9.25 | 11:53PM 8.67 | 12:28PM 8.75 | 1:29AM 8.38 | 2:16PM 8.76 | 3:15AM 8.83 | 3:43PM 9.45 | |||||||||
Low Tide / height (m) | 4:07PM 3.14 | 4:20AM 3.54 | 4:42PM 3.67 | 4:58AM 4.11 | 5:26PM 4.19 | 5:46AM 4.65 | 6:25PM 4.61 | 6:54AM 5.02 | 7:42PM 4.77 | 8:18AM 5.02 | 9:06PM 4.48 | 9:41AM 4.53 | 10:21PM 3.78 | ||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 01 | |||||||||||||||
| Sunrise | 7:43 | - | - | 7:45 | - | - | 7:47 | - | - | 7:48 | - | - | 7:50 | - | - | 7:50 | - | - | 7:52 | - | - |
| Sunset | - | 5:59 | - | - | 5:57 | - | - | 5:54 | - | - | 5:53 | - | - | 5:52 | - | - | 5:50 | - | - | 5:49 | - |
 | |  |  |  | | |  |  |  | | | | |  | | | | | | | |
Rain (mm) | - | - | 1 | 2 | 2 | 1 | - | - | - | - | - | - | - | - | 3 | - | - | 5 | - | - | 1 |
| Temp. °C | 12 | 12 | 14 | 14 | 14 | 14 | 15 | 15 | 13 | 15 | 16 | 13 | 16 | 16 | 14 | 16 | 16 | 13 | 14 | 15 | 13 |
| Feels °C (?) | 5 | 4 | 5 | 6 | 8 | 9 | 9 | 10 | 10 | 12 | 13 | 10 | 11 | 10 | 9 | 9 | 9 | 8 | 9 | 11 | 5 |
- 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 Brittany - Ile et Vilaine
Recent clean conditions at Le Sillon have likely become affected by the arrival of onshore winds (gales from the NW at St Lunaire 9 km from Le Sillon). A 1.1m windswell from the WNW
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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