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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
16 Day Weather and Surf, issued 1 pm Friday 15 May 2026 CESTForecast 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
13.7° C
(Which is 1.1°C warmer than normal for this time of year)Best Forecast Surf Conditions for Le Sillon this week:
The surf forecast for Le Sillon over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (May 18) at 8PM. The primary swell is predicted to be 1.1m and 10s period with a secondary swell of 0.3m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Le Sillon in the next 16 days are 1.1m 12s and forecast to arrive on Monday (May 18) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (May 19) at 5AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Mon 18th May) | 3.5ft (1.1m) 10s |
| Best Surf | 8PM (Mon 18th May) | 3.5ft (1.1m) 10s |
| Most Powerful | 2AM (Mon 18th May) | 3.5ft (1.1m) 12s |
Table - best surf conditions forecast for Le Sillon over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Sat afternoon. Very mild (max 12°C on Sat afternoon, min 9°C on Sat morning). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Mon night. Warm (max 20°C on Wed afternoon, min 11°C on Mon afternoon). Winds decreasing (fresh winds from the SSW on Mon night, calm by Wed afternoon). | ||||||||||||||||||||
Fri 15 | Saturday 16 | Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
NW 8 | NW 6 | WNW 6 | W 4 | WNW 6 | WNW 7 | WNW 14 | WNW 12 | WNW 12 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | W 14 | WNW 13 | WNW 12 | WNW 12 | W 11 | W 11 | |
115 | 69 | 28 | 19 | 25 | 68 | 78 | 344 | 123 | 258 | 125 | 88 | 181 | 116 | 88 | 100 | 218 | 147 | 107 | 88 | 59 | |
Wind (km/h) | |||||||||||||||||||||
on | on | cross | cross-on | cross-on | cross-on | on | cross | cross | cross | cross-off | cross-on | on | cross | cross | glassy | glassy | off | cross-off | off | off | |
High Tide | 7:05PM11.77m | 7:26AM12.13m | 7:48PM12.30m | 8:10AM12.46m | 8:31PM12.56m | 8:54AM12.47m | 9:15PM12.50m | 9:38AM12.17m | 9:59PM12.14m | 10:25AM11.59m | 10:47PM11.54m | 11:15AM10.84m | 11:38PM10.80m | 12:11PM10.04m | |||||||
Low Tide | 1:48AM1.72m | 2:12PM1.43m | 2:35AM1.28m | 2:58PM1.23m | 3:22AM1.11m | 3:45PM1.30m | 4:10AM1.22m | 4:32PM1.63m | 4:59AM1.57m | 5:22PM2.14m | 5:50AM2.10m | 6:14PM2.76m | 6:45AM2.71m | ||||||||
 |  |  |  |  | | | | | | |  | |  | |  | | | | | | |
 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 |
 | — | 9:40 | — | — | 9:43 | — | — | 9:44 | — | — | 9:45 | — | — | 9:45 | — | — | 9:47 | — | — | 9:49 | 9:50 |
— | — | — | 1 | 1 | — | 1 | 1 | 1 | — | 3 | 1 | — | — | — | — | — | — | — | — | — | |
Temp °C | 11 | 11 | 11 | 12 | 12 | 11 | 12 | 12 | 12 | 12 | 13 | 15 | 16 | 16 | 14 | 20 | 19 | 16 | 22 | 22 | 18 |
5 | 5 | 6 | 8 | 9 | 6 | 7 | 8 | 6 | 8 | 8 | 12 | 12 | 13 | 12 | 20 | 18 | 15 | 21 | 20 | 17 | |
Swell 1 Height (m) Direction Period (s) | — | — | WNW 6 | WNW 8 | WNW 8 | WNW 15 | WNW 14 | WNW 12 | WNW 12 | WNW 10 | WNW 10 | WNW 9 | — | WNW 9 | WNW 9 | WNW 10 | WNW 13 | WNW 12 | WNW 12 | W 11 | W 11 |
 kJ | — | — | 28 | 6 | 11 | 22 | 78 | 344 | 123 | 258 | 125 | 88 | — | 116 | 88 | 85 | 218 | 147 | 107 | 88 | 59 |
Swell 2 Height (m) Direction Period (s) | — | — | N 5 | N 4 | W 14 | WNW 12 | — | — | — | — | — | — | — | W 13 | WNW 16 | W 14 | — | — | — | — | — |
| kJ | — | — | 7 | 2 | 4 | 15 | — | — | — | — | — | — | — | 4 | 25 | 100 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | W 16 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 5 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 8 | NW 6 | — | W 4 | WNW 6 | WNW 7 | WNW 7 | WNW 4 | W 7 | SW 3 | SSW 4 | SW 4 | WNW 9 | — | — | — | — | — | SE 2 | ESE 2 | ESE 3 |
| kJ | 115 | 69 | — | 19 | 25 | 68 | 68 | 10 | 106 | 7 | 14 | 10 | 181 | — | — | — | — | — | 1 | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 711 | 148 | 122 | 270 | 146 | 146 | 524 | 122 | 122 | 122 | 297 | 298 | 585 | 108 | 12 | 12 | 12 | 12 | 12 | 12 | 61 |
Best forecast wave conditions in Ile et Vilaine - Brittany | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 16 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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