Belle Ile Surf Break

Lat Long: 47.32° N 3.25° W

Belle Ile Surf Forecast and Surf Report

Issued: 1 pm 14 Aug 2026 (local time)

Forecast update in  hr  min

Today's Belle Ile sea temperature is
20.7° C
1.5° 

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


Belle Ile surf forecast from 14 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 11AM (local time) - 4ft (1.2m), 9s period, WNW swell with cross-offshore winds.
  • Most powerful swell: Thursday 20 Aug, 2AM (local time) - 4.5ft (1.3m), 9s period, WNW swell with 273 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 11AM (local time) - 4ft (1.2m), 9s period with WNW swell.

Best Forecast Surf Conditions for Belle Ile this week:

The surf forecast for Belle Ile over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 11AM. The primary swell is predicted to be 1.2m and 9s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Belle Ile in the next 16 days are 1.3m 9s and forecast to arrive on Thursday (Aug 20) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Friday (Aug 21) at 5AM.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Thu 20th Aug)4ft (1.2m) 9s
Best Surf11AM (Thu 20th Aug)4ft (1.2m) 9s
Most Powerful 2AM (Thu 20th Aug)4.5ft (1.3m) 9s

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


The Lowdown

Right, let’s have a look at what’s on the menu for the next couple of weeks around Belle Ile.

To be honest, for the first week and a half, it’s pretty gutless. We’ve got tiny, weak swell and a lot of onshore winds tossing things around. The water temperature is 69°F, which is a touch warmer than normal for this time of year, so that’s a slight silver lining, but you won’t need more than a spring suit. There’s a real flat spell from the 17th through to the 25th, with barely a ripple. If you’re hanging for a wave, you might be better off finding something else to do.

The first sign of life comes on Wednesday the 26th, but it’s still pretty marginal. We see a pulse of 4ft W swell arriving in the afternoon, with a period of 10 seconds and light cross-on winds. There’s some moderate wave energy in the water (316), but it’s not enough to get too excited about, and the conditions are still ordinary.

Thursday the 27th is when things start to get a bit more interesting, size-wise. The morning brings 5ft W swell at 8 seconds, with light onshore winds. It’s a bit lumpy, but surfable for the keen ones. The afternoon sees the swell bump up to 7ft from the WSW, with the period dropping to 8 seconds. The energy is building (560), and the winds stay light. It’s not perfect, but it’s the best we’ve seen so far. You’d want to be comfortable in slightly messed-up conditions.

The standout, and I mean the *only* real standout of this whole window, is that Saturday the 29th afternoon. We’ve got a solid 10ft W swell rolling in with a 12-second period. The energy is strong, with readings of 2297. The winds ease off to a moderate cross-shore, and the notes say conditions are favorable. Belle Ile is an exposed break, and it’ll be handling this size with authority. Now, this is a powerful, solid swell, definitely not for beginners. It’s one for the experienced crew. The cross-shore wind will keep it a bit of a handful, but that’s what you want. It’s the only time in the next two weeks where the size, period, and wind all kind of line up to make something special. For the days before that, everything is either too small or blown out. The build-up on the 28th looks like a complete mess, with near-gale force winds, so you can skip that.

So, mark your calendar for that Saturday. It’s a long-range call, so don’t take it to the bank just yet, but it’s got the potential to be a proper session. Before that, it’s a whole lot of nothing.

Rusty

Short Range Forecast

Mostly dry. Warm (max 28°C on Fri night, min 17°C on Sun night). Mainly fresh winds.

Days 5-7 Weather Summary

Mostly dry. Warm (max 24°C on Mon night, min 15°C on Wed night). Winds increasing (light winds from the NNW on Mon night, fresh winds from the WNW by Wed night).

Fri
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
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
1
2
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)
1
W
9
0.7
W
9
0.9
WNW
8
1
W
8
1.2
WNW
7
0.8
WNW
8
0.8
WNW
8
0.8
WNW
6
0.4
NW
7
0.5
WNW
7
0.7
WNW
5
0.4
WNW
7
0.6
W
7
0.7
WNW
6
0.5
W
7
1.2
WNW
4
1.3
WNW
9
1.2
WNW
9
1.1
WNW
9
0.8
WNW
9
Wave Graph
Metric surfscale
Energy kJ
169
74
122
131
147
64
72
47
12
27
23
16
35
30
28
55
273
213
180
101
Wind (km/h)
30
WNW
20
N
15
N
25
WNW
30
NNE
15
N
25
W
25
NNE
15
N
25
W
15
N
15
WNW
25
W
25
NW
15
NNW
30
WNW
25
NNE
15
NNE
25
WNW
30
NNE
Wind State
on
cross
cross
on
cross-off
cross
on
cross-off
cross
on
cross
on
on
cross-on
cross-on
on
cross-off
cross-off
on
cross-off
High Tide
6:49PM4.60m
7:11AM4.23m
7:27PM4.47m
7:47AM4.10m
8:03PM4.24m
8:21AM3.91m
8:37PM3.92m
8:55AM3.67m
9:12PM3.58m
9:30AM3.40m
9:51PM3.24m
10:13AM3.14m
10:42PM2.93m
Low Tide
1:01AM-0.16m
1:14PM-0.03m
1:41AM-0.02m
1:55PM0.13m
2:20AM0.22m
2:35PM0.38m
2:59AM0.54m
3:17PM0.69m
3:40AM0.88m
4:04PM1.03m
4:28AM1.21m
4:59PM1.33m
clear
clear
part cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:07
7:09
7:11
7:11
7:13
7:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:27
9:24
9:22
9:22
9:20
9:17
9:15
 mm
Temp °C
26
28
19
22
26
19
22
25
18
21
24
18
20
20
18
19
20
16
19
20
Feels °C
22
25
16
19
24
16
19
19
16
18
19
17
18
18
16
14
14
14
15
15
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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 Surf forecast

The above surf forecast table for Belle Ile 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 can be found by selecting the local surf guide option on the grey menu. Our Belle Ile 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) 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 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 is 48 km (30 miles) from the city of Ploemeur. If you plan a holiday in Morbihan - Brittany, look for hotels and other accommodation in Ploemeur. Ploemeur has rooms for a wide range of budgets as well as car hire and transport links.

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