Belle Ile - Les Donnants Surf Break

Lat Long: 47.32° N 3.24° W

Belle Ile - Les Donnants Surf Forecast and Surf Report

Issued: 1 am 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Belle Ile - Les Donnants sea temperature is
19.9° C
0.8° 

Belle Ile - Les Donnants surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Belle Ile - Les Donnants surf forecast from 9 Aug 2026:

  • Best quality surf: Wednesday 12 Aug, 5AM (local time) - 1.5ft (0.4m), 11s period, W swell with offshore winds.
  • Most powerful swell: Thursday 13 Aug, 8PM (local time) - 4ft (1.2m), 10s period, W swell with 313 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 12 Aug, 5AM (local time) - 1.5ft (0.4m), 11s period with W swell.

Best Forecast Surf Conditions for Belle Ile - Les Donnants this week:

The surf forecast for Belle Ile - Les Donnants over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 5AM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.3m and 8s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Belle Ile - Les Donnants in the next 16 days are 1.2m 10s and forecast to arrive on Thursday (Aug 13) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Tuesday (Aug 11) at 5AM.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 12th Aug)1.5ft (0.4m) 11s
Best Surf 5AM (Wed 12th Aug)1.5ft (0.4m) 11s
Most Powerful 8PM (Thu 13th Aug)4ft (1.2m) 10s

Table - best surf conditions forecast for Belle Ile - Les Donnants over the next 16 days.


The Lowdown

Alright, this is Rusty comin' at ya from the coast. Let's be real straight up: the next couple of weeks are lookin' grim for a proper paddle. There's a real dry spell ahead, so don't be gettin' your hopes up too quick.

For the first week, from August 9th all the way through to the 15th, it's basically a write-off. We're talkin' tiny little waves, mostly around 1ft to 2ft, and the wind just keeps messin' it up. You'll get some clean spells on the mornings of the 11th and 12th with offshore breezes, but the swell is just too weak to bother with – the energy is in the doldrums (between 40 and 100). The 12th of August shows a little pulse of 2ft to 3ft with a clean offshore wind, but the conditions are still described as "very ordinary." Honestly, it's a tough stretch.

The one spot we've got to look at is Belle Ile - Les Donnants. It's a river break, consistent, and exposed to the SW. The water temp is sittin' around 68°, which is about normal for this time of year. The optimum swell direction is SW, but we're gettin' mostly WNW and W swell through the period, so it's not a perfect match.

Now, if you're desperate, the best of a bad bunch might be the morning of Wednesday, August 12th. We'll see a tiny 2ft swell from the West with a 10-second period (moderate energy at 100). The wind will be offshore from the East, which should keep things clean. But honestly, it's a "surfable" wave at best, nothin' to write home about.

After that, we get a little bump in energy on the 13th and 14th, but the onshore winds just wreck it. The 20th of August has a pulse of 3ft from the WNW with a long 11-second period (energy climbin' to 229), but the wind is cross-off, so it might be clean but still lookin' pretty ordinary. The 21st through the 24th is just more of the same: small, messy, and not worth the paddle out.

Honestly, this is a classic case of "don't bother." The setup is more interesting for a kite surfer than a paddle surfer on those windy afternoons. The finder's got nothin' good to say, so I'd keep the board in the bag and wait for the next system. Forecasts can change, but this one's lookin' stubborn.

Stay thirsty, Rusty.

Short Range Forecast

Mostly dry. Warm (max 29°C on Tue afternoon, min 18°C on Sun night). Mainly fresh winds.

Days 4-6 Weather Summary

Some drizzle, heaviest during Fri afternoon. Warm (max 30°C on Fri night, min 20°C on Thu night). Wind will be generally light.

Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
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
1
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)
0.4
WNW
9
0.4
WNW
9
0.8
NW
5
0.4
WNW
9
0.4
WNW
9
0.4
WNW
8
0.4
WNW
8
0.4
WNW
8
0.3
W
12
0.7
W
10
0.8
W
10
0.8
W
9
0.9
W
10
1
W
11
1.2
WNW
10
0.8
W
10
0.8
W
9
0.6
W
9
0.6
W
8
0.5
WNW
8
0.4
W
8
Wave Graph
Metric surfscale
Energy kJ
35
32
31
32
30
28
26
26
25
98
121
106
145
229
294
117
106
55
49
38
20
Wind (km/h)
5
NNE
25
W
20
N
15
N
25
W
25
NE
25
ENE
15
WSW
15
NNE
15
E
20
WSW
20
WNW
15
WNW
25
WNW
25
N
15
NNW
20
W
20
N
10
NNE
20
NW
15
NE
Wind State
glassy
on
cross
cross
on
cross-off
off
cross-on
cross-off
off
on
on
on
on
cross
cross-on
on
cross-off
cross-off
cross-on
cross-off
High Tide
2:40PM3.50m
3:21AM3.52m
3:47PM3.83m
4:21AM3.80m
4:40PM4.17m
5:10AM4.04m
5:27PM4.44m
5:53AM4.20m
6:10PM4.59m
6:34AM4.26m
6:49PM4.60m
7:11AM4.23m
7:27PM4.47m
Low Tide
8:10AM1.03m
8:51PM0.81m
9:19AM0.78m
9:55PM0.48m
10:16AM0.48m
10:49PM0.17m
11:05AM0.20m
11:36PM-0.06m
11:50AM0.01m
00:20AM-0.18m
12:33PM-0.07m
1:01AM-0.16m
1:14PM-0.03m
1:41AM-0.02m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
clear
clear
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:00
7:01
7:03
7:03
7:05
7:07
7:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:35
9:32
9:31
9:30
9:29
9:27
9:24
 mm
1
1
Temp °C
20
22
23
18
23
25
21
29
29
25
28
28
24
26
28
22
28
30
23
28
29
Feels °C
16
19
19
16
19
21
17
26
26
22
24
26
22
21
23
19
24
27
22
25
26
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Belle Ile - Les Donnants Surf forecast

The above surf forecast table for Belle Ile - Les Donnants provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Belle Ile - Les Donnants can be found by selecting the local surf guide option on the grey menu. Our Belle Ile - Les Donnants 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 (Belle Ile - Les Donnants) 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 Belle Ile - Les Donnants 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.

Belle Ile - Les Donnants is 48 km (30 miles) from Lorient. If you plan a holiday in Morbihan - Brittany, look for hotels and other accommodation in Lorient. Lorient has rooms for a wide range of budgets as well as car hire and transport links.

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