Surf Forecasts:
Le Sillon surf forecast from 3 Aug 2026:
- Most powerful swell: Wednesday 5 Aug, 11PM (local time) - 4ft (1.2m), 8s period, WNW swell with 188 kJ wave energy.
Best Forecast Surf Conditions for Le Sillon this week:
The most powerful waves expected at Le Sillon 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.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Wed 5th Aug) | 4ft (1.2m) 8s |
Table - best surf conditions forecast for Le Sillon over the next 16 days.
The Lowdown
Well, Rusty here. Let's have a yarn about what's on the table. It's gonna be quiet. Dead quiet. The only spot in the mix is Le Sillon, a sandbar set-up, and it's not lookin' like any kind of winner. We're looking at a long stretch of nothing much over this 16-day window.
We start on Monday, August 3rd. There's a tiny 0.7 ft swell from the West, period about 10 seconds, but the combined wave energy is a weak 9. The water temp is 69°, running *much* warmer than normal for now. But the surf quality is poor. Total dud.
Through that first week, it's flat and messy. By Tuesday the 4th, still tiny at 0.7 ft to 1.0 ft. Winds are mostly cross-shore or straight onshore, making everything choppy. Wednesday the 5th sees a slight bump, the swell hits 3 ft to 3 ft from the WNW, period is a short 8 seconds, and the energy gets up to a moderate 109 then 137. But the wind is a strong onshore at 15 mph from the NW, blowing the place apart. It's junk. The rest of the week through Saturday the 8th is small, weak, and ugly.
The second week gets a little cleaner here and there. Wednesday morning the 12th of August has a light offshore wind from the ESE. The swell is tiny at 1 ft from the WNW (6 second period). It'll look clean on the surface, but with combined energy of only 24, you'll be lucky to get wet. From Thursday the 13th all the way to Tuesday the 18th of August, it's more tiny surf, often choppy, and nothing that'll make you paddle out.
Honestly, for a sandbar, this setup is more interesting for kiteboarding than paddling. This is a long dry spell. Things can change, but at the moment, there's nothing doing.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Tue afternoon, min 16°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Sat afternoon, min 16°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | W 10 | W 10 | W 9 | W 9 | W 9 | WNW 5 | W 4 | WNW 8 | WNW 8 | WNW 7 | NW 7 | NW 4 | NW 6 | WNW 6 | WNW 6 | NW 4 | WNW 9 | WNW 10 | WNW 9 | WNW 9 | WNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 8 | 2 | 6 | 6 | 23 | 41 | 134 | 49 | 62 | 54 | 19 | 12 | 3 | 3 | 5 | 8 | 9 | 31 | 31 | 27 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross | on | cross | cross-on | on | on | on | on | on | cross-on | on | cross-on | cross-on | on | cross | cross-on | on | cross |
High Tide | 10:51AM11.37m | 11:07PM11.59m | 11:28AM11.11m | 11:47PM11.20m | 12:10PM10.67m | 00:34AM10.60m | 1:02PM10.07m | 1:33AM9.88m | 2:10PM9.48m | 2:54AM9.30m | 3:41PM9.23m | 4:30AM9.28m | 5:10PM9.61m | ||||||||
Low Tide | 5:35PM2.38m | 5:57AM2.35m | 6:12PM2.71m | 6:36AM2.81m | 6:54PM3.17m | 7:22AM3.38m | 7:46PM3.70m | 8:21AM3.96m | 8:57PM4.17m | 9:42AM4.35m | 10:34PM4.26m | 11:22AM4.20m | 00:09AM3.70m | ||||||||
 | |  |  | | | | | | | |  | | |  |  | | | | | | |
 | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — |
 | — | — | 9:43 | — | — | 9:42 | — | — | 9:39 | — | — | 9:38 | — | — | 9:37 | — | — | 9:35 | — | — | 9:34 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 24 | 21 | 23 | 26 | 24 | 18 | 19 | 18 | 17 | 18 | 17 | 17 | 18 | 17 | 18 | 19 | 18 | 18 | 24 | 24 |
Feels °C | 21 | 21 | 18 | 23 | 27 | 24 | 14 | 14 | 14 | 14 | 14 | 13 | 16 | 15 | 13 | 15 | 16 | 14 | 15 | 19 | 20 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | W 9 | W 9 | W 9 | WNW 5 | — | — | WNW 8 | — | W 10 | W 10 | NW 6 | WNW 6 | WNW 6 | NW 4 | WNW 9 | NNW 3 | WNW 9 | WNW 9 | WNW 8 |
| kJ | 8 | 8 | 2 | 6 | 6 | 9 | — | — | 49 | — | 2 | 2 | 12 | 3 | 3 | 5 | 8 | 2 | 31 | 31 | 27 |
Swell 2 Height (m) Direction Period (s) | — | W 6 | — | — | — | W 9 | — | — | — | — | — | W 10 | W 10 | W 9 | W 9 | W 9 | W 6 | WNW 10 | — | — | WNW 8 |
| kJ | — | 1 | — | — | — | 2 | — | — | — | — | — | 2 | 2 | 2 | 2 | 2 | 1 | 9 | — | — | 14 |
Swell 3 Height (m) Direction Period (s) | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | W 9 | W 9 | — | — | — | — | — |
| kJ | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NW 3 | WSW 3 | WNW 3 | WNW 5 | W 4 | WNW 8 | NW 5 | WNW 7 | NW 7 | NW 4 | — | NNW 3 | NNW 3 | — | NNW 3 | N 3 | — | — | N 3 |
| kJ | — | — | 1 | 2 | 1 | 23 | 41 | 134 | 35 | 62 | 54 | 19 | — | 3 | 2 | — | 3 | 1 | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 192 | 100 | 183 | 122 | 544 | 122 | 198 | 602 | 122 | 149 | 585 | 152 | 196 | 524 | 585 | 196 | 688 | 199 | 183 | 179 | 196 |
Best forecast wave conditions in Ile et Vilaine - Brittany | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
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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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