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 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Belle Ile - Les Donnants sea temperature is
19.7° C
0.7° 

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 4 Aug 2026:

  • Most powerful swell: Wednesday 5 Aug, 8PM (local time) - 5ft (1.6m), 8s period, W swell with 316 kJ wave energy.

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

The most powerful waves expected at Belle Ile - Les Donnants in the next 16 days are 1.6m 8s and forecast to arrive on Wednesday (Aug 05) 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 0.7m 4s period and expected on Friday (Aug 07) at 2AM.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Wed 5th Aug)5ft (1.6m) 8s

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


The Lowdown

Alright folks, Rusty here. Let’s get straight into it for our local stretch.

Honestly, I’ve had a good look at the next 16 days and it’s a pretty bleak run for Belle Ile - Les Donnants (France). The river mouth setup here is exposed to the SW, and we’re just not getting much love from the ocean. There’s a long dry spell ahead, with no decent surf on the cards for the whole first week and a half. From Tuesday the 4th right through to Tuesday the 18th, it’s all poor surf conditions – small, weak, messy, and mostly onshore. The combined energy values are mostly in the double digits, which is weak, peaking at just 287 on the 5th, but that’s with onshore winds and a 5ft swell that’s blown out. You’ll see a few mornings with offshore or glassy winds, like Saturday the 8th and Sunday the 9th, but the swell is barely a ripple – 0.7ft to 1ft. It’s just not worth paddling out.

Now, there is one little glimmer. On Wednesday the 19th, the morning session finally shows some promise. We’ve got a 5ft swell rolling in from the WNW, with a clean cross-off breeze from the NNE at 6 mph. That’s the standout, and the only time I’d even consider waxing the board. The combined energy jumps to 359 (moderate), and the wind is light, making for clean conditions. The water temp is sitting at 68°, which is about 1° above the long-term average – pretty normal for this time of year, so no surprises there. The swell direction is straight out of the SW optimum, and the period is 9 seconds, so it’s a short-period swell – not the most powerful, but at this spot, with clean wind, it’ll be rideable. Just keep in mind this is a river mouth, so the shape can be a bit fickle with a short-period groundswell, but it’s the best we’ve got. The afternoon looks poor again as the wind swings onshore, so get your session in early.

Bottom line: 16 days of mostly nothing, with one clean morning on the 19th. Don’t hold your breath, but keep an eye on that date.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 21°C on Tue afternoon, min 15°C on Wed night). Mainly strong winds.

Days 4-6 Weather Summary

Some drizzle, heaviest during Sun morning. Warm (max 26°C on Sat afternoon, min 14°C on Fri morning). Winds decreasing (fresh winds from the NE on Fri night, calm by Sun morning).

Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
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
0
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)
0.9
WSW
8
1.2
WSW
7
1.2
WSW
7
1.2
W
7
1.5
W
8
1.3
WNW
7
0.7
WNW
7
0.7
WNW
7
0.8
WNW
5
0.3
W
10
0.3
W
9
0.7
NW
5
0.2
W
9
0.2
WNW
11
0.4
WNW
10
0.4
WNW
9
0.4
WNW
9
0.8
WNW
6
0.4
WNW
8
0.9
WNW
8
0.8
WNW
6
Wave Graph
Metric surfscale
Energy kJ
104
147
128
128
287
177
49
45
31
16
15
24
6
12
38
32
32
34
27
105
40
Wind (km/h)
20
WSW
25
SW
25
W
25
WNW
35
WNW
20
N
10
NNW
30
W
25
NNE
10
ENE
20
WNW
30
NE
20
ENE
10
W
25
NNE
5
NE
15
NW
10
N
15
NNW
30
W
20
NNE
Wind State
cross-on
cross-on
on
on
on
cross
cross
on
cross-off
cross-off
on
cross-off
off
on
cross-off
glassy
cross-on
cross
cross-on
on
cross-off
High Tide
8:49AM3.74m
9:07PM3.83m
9:32AM3.60m
9:55PM3.62m
10:25AM3.43m
10:56PM3.39m
11:36AM3.29m
00:22AM3.23m
1:10PM3.29m
2:02AM3.29m
2:40PM3.50m
3:21AM3.52m
3:47PM3.83m
4:21AM3.80m
Low Tide
3:10PM0.65m
3:38AM0.68m
3:58PM0.83m
4:30AM0.88m
4:58PM1.01m
5:35AM1.06m
6:13PM1.11m
6:52AM1.14m
7:35PM1.04m
8:10AM1.03m
8:51PM0.81m
9:19AM0.78m
9:55PM0.48m
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
light rain
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:54
6:56
6:58
6:58
7:00
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:43
9:40
9:39
9:37
9:37
9:35
9:32
 mm
1
Temp °C
20
21
20
18
18
18
15
18
19
15
18
21
18
26
26
19
25
24
19
24
26
Feels °C
19
20
18
14
14
12
12
13
11
13
17
17
14
22
20
15
21
20
16
18
19
  • 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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