Guethary - Les Alcyons/Avalanche Surf Break

Lat Long: 43.43° N 1.62° W

Guethary - Les Alcyons/Avalanche 48 hour detailed Surf Forecast

Issued: 1 am 21 Sep 2026 (local time)

Forecast update in  hr  min

Today's Guethary - Les Alcyons/Avalanche sea temperature is
22.1°C
2.3° 

Guethary - Les Alcyons/Avalanche surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Guethary - Les Alcyons/Avalanche today (21 Sep):

  • Morning surf: Morning surf (21 Sep, local time) - 5.5ft (1.7m), 11s period with NW swell.
  • Afternoon surf: Afternoon surf (21 Sep, local time) - 5ft (1.6m), 11s period with NW swell.
  • Evening surf: Evening surf (21 Sep, local time) - 5ft (1.5m), 11s period with NW swell.

The current surf forecast for Guethary - Les Alcyons/Avalanche at 9AM is: 1.7m 11s primary swell from a Northwest direction (forecast issued at 01:00am September 21). The wind direction is predicted to be cross-offshore and the swell rating is 3.

Time (CEST) & DateWave HeightWave Period
Morning (21 Sep)5.5ft (1.7m)11s
Afternoon (21 Sep)5ft (1.6m)11s
Evening (21 Sep)5ft (1.5m)11s

Table - waves today at Guethary - Les Alcyons/Avalanche. (Swell directed towards the surf break)


Short Range Forecast

Mostly dry. Warm (max 21°C on Mon afternoon, min 16°C on Mon morning). Wind will be generally light.

Monday
21
Tuesday
22
Wednesday
23
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
2
2
3
3
2
1
2
2
2
2
1
1
1
0
1
1
1
1
1
2
1
1
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
NW
11
1.5
NW
11
1.7
NW
11
1.6
NW
11
1.6
NW
11
1.6
NW
11
1.5
NW
11
1.6
NW
11
1.4
NW
11
1.4
NW
11
1.3
NW
11
1.3
NW
12
1.2
NW
12
1.2
NW
12
1.1
NW
12
1.1
NW
11
1
NW
11
1
NW
11
1
NW
11
0.9
WNW
16
1
WNW
15
1.3
WNW
15
1.3
WNW
14
1.6
WNW
14
Wave Graph
Metric surfscale
Energy kJ
683
505
696
652
652
640
534
585
488
488
445
478
389
389
338
278
237
233
233
427
474
784
712
1014
Wind (km/h)
5
SW
10
SW
10
SSW
0
WNW
5
NW
10
NW
5
W
10
WSW
10
SW
10
SW
10
SW
5
W
10
NNW
10
NW
10
WSW
15
SW
10
SW
10
SW
10
SW
10
W
15
W
10
W
10
WNW
10
SW
Wind State
cross
cross
cross-off
glassy
on
on
cross-on
cross
cross
cross
cross
cross-on
on
on
cross-on
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross
High Tide
1:30AM2.46m
1:57PM2.69m
2:36AM2.66m
2:51PM2.94m
3:19AM2.91m
3:30PM3.21m
Low Tide
7:23AM1.46m
8:11PM1.25m
8:27AM1.23m
9:00PM0.98m
9:12AM0.95m
9:39PM0.70m
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:50
7:52
7:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:06
8:05
8:02
 mm
Temp °C
18
16
16
18
21
21
19
18
18
18
17
19
21
21
19
18
18
18
18
20
21
21
20
19
Feels °C
19
16
16
20
21
20
20
17
18
18
17
20
21
19
17
15
15
15
15
17
19
20
20
19
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

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