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 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Guethary - Les Alcyons/Avalanche sea temperature is
24.9° C
3.1° 

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 (18 Aug):

  • Morning surf: Morning surf (18 Aug, local time) - 1.5ft (0.5m), 6s period with NW swell.
  • Afternoon surf: Afternoon surf (18 Aug, local time) - 2ft (0.6m), 8s period with NW swell.
  • Evening surf: Evening surf (18 Aug, local time) - 1.5ft (0.5m), 8s period with NW swell.

The current surf forecast for Guethary - Les Alcyons/Avalanche at 10AM is: 0.4m 7s primary swell from a Northwest direction and 0.4m 6s secondary swell from a North-northwest direction (forecast issued at 01:00am August 18). The wind direction is predicted to be glassy.

Time (CEST) & DateWave HeightWave Period
Morning (18 Aug)1.5ft (0.5m)6s
Afternoon (18 Aug)2ft (0.6m)8s
Evening (18 Aug)1.5ft (0.5m)8s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Thu night. Warm (max 24°C on Tue afternoon, min 18°C on Thu night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
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)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
2
0
0
0
0
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)
0.6
NW
6
0.6
NW
6
0.5
NW
6
0.4
NW
7
0.6
NW
9
0.5
NW
8
0.5
NW
8
0.4
NW
8
0.4
NW
7
0.4
NNW
7
0.4
NNW
6
0.4
NW
6
0.4
NW
6
0.3
NNW
6
0.3
NNW
6
0.3
NW
10
0.5
NW
13
0.7
NW
12
1
NW
12
1.1
NW
11
1.1
NW
11
1.1
NW
11
1.1
NW
10
1.3
NW
10
Wave Graph
Metric surfscale
Energy kJ
31
30
17
17
47
33
31
20
13
17
15
9
8
6
6
17
83
137
263
304
293
287
261
355
Wind (km/h)
10
WNW
5
W
5
NW
5
N
15
NNW
10
NNW
10
NNW
5
W
5
WSW
5
SW
5
S
5
WNW
10
NW
15
NW
10
WNW
5
W
5
WSW
5
SSW
5
SSW
5
SW
10
NW
15
NW
15
N
15
N
Wind State
cross-on
glassy
glassy
glassy
cross-on
cross-on
cross-on
glassy
glassy
glassy
glassy
glassy
on
on
on
cross-on
cross-on
cross-off
cross-off
glassy
on
on
cross-on
cross-on
High Tide
8:54AM3.28m
9:13PM3.21m
9:33AM3.04m
9:57PM2.89m
10:21AM2.81m
10:56PM2.63m
Low Tide
2:41AM0.52m
2:57PM0.65m
3:21AM0.82m
3:43PM0.94m
4:07AM1.12m
4:39PM1.21m
cloud
part cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
clear
clear
clear
clear
part cloud
part cloud
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:13
7:15
7:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:06
9:04
9:01
 mm
1
1
Temp °C
22
21
21
22
23
24
22
21
20
19
19
21
23
23
21
20
20
20
19
21
23
23
21
20
Feels °C
23
23
23
24
23
25
23
24
22
21
21
23
24
24
22
22
22
22
20
23
24
23
21
20
  • 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
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