Belle Ile - Les Donnants Surf Break

Lat Long: 47.32° N 3.24° W

Belle Ile - Les Donnants Surf Forecast and Surf Report

Issued: 7 am 09 Jul 2026 (local time)

Forecast update in  hr  min

Today's Belle Ile - Les Donnants sea temperature is
20.7° C
3.0° 

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 Jul 2026:

  • Best quality surf: Friday 10 Jul, 2PM (local time) - 2.5ft (0.7m), 9s period, WNW swell with offshore winds.
  • Most powerful swell: Thursday 9 Jul, 5PM (local time) - 2.5ft (0.7m), 10s period, WNW swell with 96 kJ wave energy.
  • Next surfable swell (1★+): Friday 10 Jul, 2PM (local time) - 2.5ft (0.7m), 9s period with WNW 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 Friday (Jul 10) at 2PM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.1m and 14s. 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 0.7m 10s and forecast to arrive on Thursday (Jul 09) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Sunday (Jul 12) at 5AM.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Fri 10th Jul)2.5ft (0.7m) 9s
Best Surf 2PM (Fri 10th Jul)2.5ft (0.7m) 9s
Most Powerful 5PM (Thu 9th Jul)2.5ft (0.7m) 10s

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


G’day, Rusty here, and I’ve got to be straight with you – this next 16 days is a lean stretch for the line-up. The only spot in the game is Belle Ile – Les Donnants, and even then, it’s a tough watch. We’re looking at a long dry spell with very little to get excited about, so let’s break it down.

The first sniff of anything surfable is Thursday morning, July 9th. You’re looking at small 2 ft swell from the WNW with a period of 10 seconds, and the combined energy is weak at 96. The water temperature is a notable 69°, which is much warmer than normal for this time of year – a solid 5° above average. The wind is offshore from the ENE at 9 mph, so it’ll be glassy and clean on the surface. But the waves are just ordinary – small, weak, and not really worth the paddle. That’s the best it gets, and it’s not saying much.

After that, the quality drops off a cliff. Friday the 10th through to the morning of Saturday the 19th of July is a near-total write-off. We’re talking days of poor surf conditions with swell heights bouncing between 1 ft and 3 ft, short periods (5 to 11 seconds), and mostly onshore or cross-shore winds that’ll leave it choppy and messy. The combined energy stays below 100 most days, which is telling. There’s a moment on Saturday morning the 11th with a clean offshore breeze from the east at 16 mph, but the swell is only 1 ft – just not enough to push a wave.

Then, on Sunday the 19th, we get a slight bump. The swell picks up to 3 ft from the west with an 8-second period, and the combined energy climbs to 134. Wind is a light cross-shore from the north at 3 mph, so it’s nearly glassy. But it’s still poor surf conditions – the period is short, the waves are weak, and for a river break like Les Donnants, that’s not going to produce anything rideable. Monday the 20th sees a bit more size at 4 ft from the WNW (6-second period, energy 181), but the wind is cross-offshore from the ENE at 12 mph in the morning, which could clean it up a touch. Still, that’s a stretch.

The biggest spike comes on Wednesday the 22nd of July, with a 6 ft swell from the west (6-second period) and combined energy hitting 232. But the wind is onshore and cross-on from the NW and WNW, blowing 12 to 22 mph, making it a messy, blown-out mess. Thursday the 23rd afternoon sees energy jump to 497, but again, onshore winds and a 5 ft swell from the WSW with a 9-second period – it’s just not going to be clean. By Friday the 24th, the swell is 5 ft from the west, but the wind is cross-on from the NW at 12 mph and then onshore from the WNW at 28 mph. That’s kite-surfing territory, not paddle surfing.

So, the standout? Honestly, there isn’t one. Thursday morning, July 9th, is the only window with clean, offshore conditions, but the swell is tiny. If you’re desperate, you could get a few ankle-biters. For a spot that’s consistent, this is a frustrating run. Forecasts can change, but right now, it’s a waiting game.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 34°C on Fri afternoon, min 22°C on Thu morning). Winds increasing (light winds from the ESE on Thu afternoon, near gales from the N by Fri night).

Days 4-6 Weather Summary

Some drizzle, heaviest during Mon morning. Warm (max 35°C on Sun afternoon, min 19°C on Tue morning). Mainly fresh winds.

Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
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)
1
0
0
0
0
0
1
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)
0.7
WNW
10
0.7
WNW
10
0.6
WNW
9
0.7
WNW
10
0.7
WNW
9
0.6
W
9
0.4
WNW
11
0.4
WNW
10
0.5
W
9
0.4
WNW
9
0.3
WNW
9
0.2
WNW
8
0.6
SW
6
0.6
SW
6
0.8
WSW
5
0.7
W
5
0.3
W
11
0.9
WNW
5
0.4
W
10
0.4
W
10
0.8
W
4
Wave Graph
Metric surfscale
Energy kJ
96
96
66
94
86
55
45
39
44
26
15
7
23
29
29
24
21
35
30
28
19
Wind (km/h)
15
ENE
20
W
30
NE
20
ENE
10
SW
30
NE
25
E
15
SW
25
NE
25
ENE
5
SSE
15
ESE
15
NE
15
S
15
W
20
WNW
25
W
20
NW
15
NW
30
W
25
NNW
Wind State
off
on
cross-off
cross-off
cross-on
cross-off
off
cross-on
cross-off
off
cross-off
off
cross-off
cross-off
on
on
on
cross-on
cross-on
on
cross-on
High Tide
12:15PM3.33m
00:47AM3.42m
1:31PM3.42m
2:07AM3.51m
2:43PM3.62m
3:19AM3.68m
3:47PM3.89m
4:20AM3.89m
4:44PM4.16m
5:15AM4.06m
5:35PM4.39m
6:05AM4.17m
6:23PM4.52m
Low Tide
6:40PM1.03m
7:17AM0.92m
7:51PM0.91m
8:24AM0.81m
8:58PM0.69m
9:27AM0.63m
10:00PM0.42m
10:24AM0.42m
10:56PM0.17m
11:16AM0.23m
11:49PM-0.02m
12:06PM0.09m
00:38AM-0.11m
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
rain showers
part cloud
clear
part cloud
cloud
part cloud
cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
6:26
6:26
6:28
6:28
6:30
6:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
10:08
10:08
10:07
10:07
10:07
10:06
10:05
 mm
1
Temp °C
24
30
29
27
34
27
27
29
31
27
35
34
23
24
22
19
20
22
20
22
22
Feels °C
22
26
24
23
31
21
23
27
30
22
33
32
21
23
21
19
19
18
19
19
16
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  • 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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