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 pm 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Belle Ile - Les Donnants sea temperature is
19.8° C
0.6° 

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 11 Aug 2026:

  • Best quality surf: Wednesday 12 Aug, 8AM (local time) - 1.5ft (0.5m), 11s period, W swell with offshore winds.
  • Most powerful swell: Friday 14 Aug, 2AM (local time) - 4.5ft (1.4m), 10s period, WNW swell with 356 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 12 Aug, 8AM (local time) - 1.5ft (0.5m), 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 8AM. The primary swell is predicted to be 0.5m 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 1.4m 10s and forecast to arrive on Friday (Aug 14) 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 0.8m 4s period and expected on Tuesday (Aug 18) at 2AM.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Wed 12th Aug)1.5ft (0.5m) 11s
Best Surf 8AM (Wed 12th Aug)1.5ft (0.5m) 11s
Most Powerful 2AM (Fri 14th Aug)4.5ft (1.4m) 10s

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


The Lowdown

G’day, Rusty here, checkin’ in from the coast. Look, I’m gonna be straight with you – the next week or so is a real mixed bag, and honestly, mostly a washout at Belle Ile - Les Donnants. We’ve got a long stretch of ordinary to poor conditions, with the wind just not giving us a break. The wait is a tough one, but there’s a glimmer of hope way out at the end of the forecast window.

The first few days are a write-off. Wednesday morning the 12th kicks off with tiny 2ft swell from the west and a 10-second period, but the combined energy is weak (73). It’s clean, sure, but the swell is just too small to get excited about. After that, it’s a brutal run of onshore wind and poor surf right through until the 19th. We’re talking about a full week of junk, with the wind swinging from the west to the northwest, and the swell rarely breaking 3ft. The combined energy does bump up to 228 on Thursday afternoon, but it doesn’t matter because the wind is straight onshore and messy.

Thursday morning the 20th shows a little flicker of life. Swell picks up to 4ft from the west-northwest, with a 10-second period and a combined energy of 281 – that’s moderate wave energy. The wind is a gentle cross-shore, but the forecast calls it “marginal” with questionable conditions. It’s a tease, not a goer.

Then we get another gap. From Thursday afternoon the 20th right through to the evening of the 26th, it’s back to poor surf with onshore winds and tiny, weak swell. The combined energy drops to triple digits but mostly sits below 200, and the wind is either howling or onshore. Just a flat, frustrating stretch.

Now, here’s the payoff. The standout is Thursday morning, the 27th of August. This is the one we’ve been waiting for. The swell jumps to 6ft from the west-northwest, with a solid 9-second period and a combined energy of 1033 – that’s strong wave energy. The wind is offshore from the east at 12 mph, which is a dream. The report says “excellent surf conditions for experienced surfers,” and that’s no lie. At 6ft, it’s pushing the limit for beginners, but for anyone with a bit of salt in their veins, this is a proper session. The swell direction is west-northwest, which, given the guidance says the optimum swell direction is from the southwest, means it’s not a perfect match, but a 6ft groundswell with clean offshore wind is a rare treat after all this junk. This is the one to circle on the calendar. Keep in mind it’s a river mouth spot, so with a longer period (9 seconds) it should hold up well there.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 30°C on Tue night, min 19°C on Fri morning). Winds increasing (light winds from the SE on Wed morning, fresh winds from the N by Thu night).

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Fri night. Warm (max 28°C on Fri night, min 17°C on Mon morning). Winds increasing (light winds from the NNW on Sat afternoon, fresh winds from the NNE by Sun night).

Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
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)
0.3
W
12
0.6
W
10
0.8
W
10
0.9
W
10
1
W
10
1
W
11
1.4
WNW
10
0.9
W
9
1
W
9
0.7
W
9
0.8
WNW
8
0.9
WNW
8
1.2
WNW
8
0.9
WNW
8
0.9
WNW
7
0.9
WNW
7
0.5
NNW
4
0.6
WNW
7
0.4
WNW
8
Wave Graph
Metric surfscale
Energy kJ
25
72
121
146
188
224
356
142
169
76
92
109
151
98
78
73
11
32
24
Wind (km/h)
20
NNE
5
SE
20
W
20
NW
15
WNW
20
W
20
N
15
NNW
30
WNW
20
N
15
NNW
10
W
25
N
15
N
25
W
25
N
30
NNE
20
W
35
NNE
Wind State
cross-off
cross-off
on
cross-on
cross-on
on
cross
cross
on
cross
cross
on
cross
cross
on
cross
cross-off
on
cross-off
High Tide
5:10AM4.04m
5:27PM4.44m
5:53AM4.20m
6:10PM4.59m
6:34AM4.26m
6:49PM4.60m
7:11AM4.23m
7:27PM4.47m
7:47AM4.10m
8:03PM4.24m
8:21AM3.91m
8:37PM3.92m
Low Tide
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
1:55PM0.13m
2:20AM0.22m
2:35PM0.38m
2:59AM0.54m
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
light rain
part cloud
clear
clear
clear
part cloud
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:03
7:05
7:07
7:07
7:09
7:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:31
9:30
9:29
9:27
9:24
9:22
9:22
 mm
3
1
Temp °C
30
26
27
27
24
27
29
21
26
28
19
23
23
19
23
25
18
19
21
Feels °C
27
24
25
24
22
23
24
20
21
24
18
23
21
17
20
21
13
16
19
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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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