Belle Ile Surf Break

Lat Long: 47.32° N 3.25° W

Belle Ile Surf Forecast and Surf Report

Issued: 1 am 15 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 15 Aug 2026:

  • Best quality surf: Saturday 22 Aug, 2AM (local time) - 3.5ft (1.1m), 5s period, NW swell with cross-offshore winds.
  • Most powerful swell: Thursday 20 Aug, 8PM (local time) - 5ft (1.5m), 10s period, WNW swell with 428 kJ wave energy.
  • Next surfable swell (1★+): Saturday 22 Aug, 2AM (local time) - 3.5ft (1.1m), 5s period with NW 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 Saturday (Aug 22) at 2AM. The primary swell is predicted to be 1.1m and 5s period with a secondary swell of 0.9m and 5s. Another secondary swell of 0.4m and 9s is also forecast. 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 1.5m 10s and forecast to arrive on Thursday (Aug 20) 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 0.5m 3s period and expected on Monday (Aug 17) at 2AM.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Sat 22nd Aug)3.5ft (1.1m) 5s
Best Surf 2AM (Sat 22nd Aug)3.5ft (1.1m) 5s
Most Powerful 8PM (Thu 20th Aug)5ft (1.5m) 10s

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


The Lowdown

G’day, Rusty here. For Belle Ile, the next couple of weeks ain’t looking like much of a show. It’s a long dry stretch with hardly a decent wave to be found for days on end.

Starting from Saturday the 15th of August right through to Friday the 21st of August, it’s mostly small, beat up by the wind, and flat-out frustrating. Saturday morning has some waist-high slop at 3 ft from the WNW with a short 8-second period, but that 20 km/h cross-onshore from the NNW makes it choppy – energy is weak at 122, and it’s labelled poor. Sunday the 16th is even weaker at 3 ft, 7-second period, cross-shore wind, energy down to 78. Monday the 17th is tiny at 1 ft. Tuesday the 18th morning turns glassy (NW wind at 5 km/h) but the swell is a pathetic 1 ft with only 24 energy – not even enough to stand up. Wednesday and Thursday stay poor, though Thursday the 20th afternoon does see a building WNW swell to 4 ft with a longer 10-second period and moderate energy (339), but that onshore wind at 30 km/h ruins it.

Friday the 21st morning gives a little pulse – 3 ft, 10-second period, moderate energy at 220, and a light cross-shore breeze from the NNW – but it’s still only marginal. The best of a bad bunch so far.

Then there’s a short gap into Saturday the 22nd morning, tiny and clean but only 2 ft. Saturday the 22nd afternoon finally shows something – 3 ft, 8-second period, 106 energy, and an offshore breeze from the east at 15 km/h – the comment says “surfable waves but very ordinary.” It’s clean, but short-period and weak.

Sunday the 23rd is clean with cross-offshore winds from the NE at 35 km/h, but the swell drops to 2 ft with a 7-second period – no push. Monday the 24th is more onshore junk.

But late in the window, Tuesday the 25th of August morning stands out. A 3 ft WNW swell, 9-second period, combined energy of 156 (moderate), and glassy conditions with wind from the south at only 5 km/h. Clean lines, waist-high waves, and some shape. Easily the best of the whole run. Water sits at 21°, a touch warmer than normal.

After that, Wednesday the 26th brings a bigger pulse – 4 ft from the west, long 12-second period, strong energy at 416. But it’s cross-onshore from the SW at 20 km/h, so it’ll be messy. Thursday the 27th and Friday the 28th fade back to glassy mornings with tiny surf. Saturday the 29th and Sunday the 30th are windy and small.

So the only real window to paddle is Tuesday the 25th morning – glassy, modest, and rideable. Everything else is too small, too windy, or both. The long stretch of weak surf from the start through the 21st is a dry spell, but things can change.

Keep an eye on it,
Rusty

Short Range Forecast

Mostly dry. Warm (max 26°C on Sat night, min 17°C on Sun night). Winds increasing (light winds from the N on Sun morning, strong winds from the WNW by Mon night).

Days 4-6 Weather Summary

Mostly dry. Warm (max 21°C on Tue night, min 17°C on Tue morning). Winds increasing (calm on Tue morning, strong winds from the WNW by Wed night).

Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
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
1
0
1
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
WNW
8
1
WNW
8
1
WNW
8
0.9
WNW
7
0.8
WNW
7
0.9
WNW
7
0.3
WNW
7
0.6
WNW
7
0.8
WNW
5
0.4
WNW
7
0.4
WNW
7
0.8
NW
4
0.5
W
7
0.6
WNW
7
1
NW
5
0.9
WNW
10
1.2
WNW
10
0.8
WNW
11
1
WNW
10
0.9
WNW
9
1.1
NW
5
Wave Graph
Metric surfscale
Energy kJ
122
140
120
78
62
73
9
37
33
16
15
21
28
41
54
164
248
128
175
126
60
Wind (km/h)
20
NNW
25
W
25
NNE
15
N
25
W
20
N
15
NNW
30
W
20
N
5
NW
20
W
20
NNW
15
W
30
WNW
25
NNW
20
WNW
30
WNW
20
NNW
10
NNW
25
W
10
NE
Wind State
cross-on
on
cross-off
cross
on
cross-off
cross
on
cross
glassy
on
cross
on
on
cross-on
on
on
cross-on
cross
on
cross-off
High Tide
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
11:18AM2.91m
00:19AM2.73m
Low Tide
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
5:28AM1.48m
6:12PM1.53m
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
cloud
cloud
light rain
<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
7:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:24
9:22
9:22
9:20
9:17
9:15
9:15
 mm
1
Temp °C
19
22
26
19
22
26
18
22
23
17
19
21
21
20
20
18
19
18
17
18
18
Feels °C
17
21
23
18
20
20
16
17
17
17
18
18
21
15
12
14
14
11
16
16
13
  • 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 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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