Guethary - Les Alcyons/Avalanche Surf Break

Guethary - Les Alcyons/Avalanche Surf Forecast and Surf Report

Lat Long: 43.43° N 1.62° W

Issued: 1 pm 02 Jul 2026 (local time)

Forecast update in  hr  min

Today's Guethary - Les Alcyons/Avalanche sea temperature is
24.0° C

4.2°C warmer than normal for this time of year

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


Guethary - Les Alcyons/Avalanche surf forecast from 2 Jul 2026:

  • Best quality surf: Saturday 4 Jul, 2AM (local time) - 4ft (1.2m), 10s period, NW swell with glassy winds.
  • Most powerful swell: Friday 3 Jul, 5PM (local time) - 4.5ft (1.3m), 11s period, NW swell with 414 kJ wave energy.
  • Next surfable swell (1★+): Saturday 4 Jul, 2AM (local time) - 4ft (1.2m), 10s period with NW swell.

Best Forecast Surf Conditions for Guethary - Les Alcyons/Avalanche this week:

The surf forecast for Guethary - Les Alcyons/Avalanche over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 04) at 2AM. The primary swell is predicted to be 1.2m and 10s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Guethary - Les Alcyons/Avalanche in the next 16 days are 1.3m 11s and forecast to arrive on Friday (Jul 03) at 5PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Sat 4th Jul)4ft (1.2m) 10s
Best Surf 2AM (Sat 4th Jul)4ft (1.2m) 10s
Most Powerful 5PM (Fri 3rd Jul)4.5ft (1.3m) 11s

Table - best surf conditions forecast for Guethary - Les Alcyons/Avalanche over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Alright, let’s get real about this. Honestly, it’s a pretty flat and frustrating run ahead for the next couple of weeks. The only break we’ve got on the cards is Guethary - Les Alcyons/Avalanche (France), and I’m not gonna sugarcoat it—this stretch looks bleak.

We’re starting off with nothing really rideable right now, and it’s gonna be a long gap. From Thursday 2nd July right through to Sunday 12th July, the forecast is just grim. The swell is tiny, mostly under 3ft, and that combined energy is weak—hanging around 38 to 272 (weak to moderate at best). The real killer is that the wind is almost always onshore or cross-onshore out of the NW or WNW, which is the wrong direction for this spot, and that’s messing up any chance of clean waves. Even on the Saturday 11th July morning, when we see a touch more period (12 seconds) and a bit of energy hitting 239 (moderate), the wind is still onshore, so it’s not gonna be worth paddling out for.

There is a glimmer, I gotta admit. Sunday 12th July morning, we’ve got near-flat glassy conditions with a tiny 2-3ft NW swell at 10 seconds. The wind is glassy—offshore from the NNW at just 3 mph—so it’ll look clean, but honestly, the wave size is barely enough to get a slide. You might get a knee-high or waist-high wave if the period holds, but it’s not a standout, just the least bad option in a sea of nothing.

After that, it drops right back off. From Monday 13th July through to Friday 17th July, we’re back to dribble—1ft to 3ft, short periods, onshore winds, energy numbers mostly below 100 (weak). Absolutely nothing to get excited about. This is a long, quiet stretch for this reef.

For the record, the water temperature is sitting at about 75°F on the first day—that’s much warmer than normal for the time of year, almost 8°F above average, so don’t bother with a thick wetsuit, but you’ll still be dry sitting on the beach.

Given the persistent small, weak, onshore conditions, and that the break is an exposed reef, the setup honestly looks more suited for a drift or a paddle than any proper surfing. If there’s any energy to be had, it’ll be a kite surfer’s playground, not a surfer’s.

Keep your eyes on the charts—forecasts can change, and it’s not often this area stays this poor for so long. But for now, I’d say find a spot to watch the sunset and wait.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 23°C on Sat afternoon, min 18°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 35°C on Mon afternoon, min 22°C on Sun night). Wind will be generally light.

Thu
2
Friday
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
0
0
0
2
1
0
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
NW
9
1.1
NW
9
0.8
NW
9
1.3
NW
11
1.2
NW
10
1.1
NW
10
1
WNW
10
1.1
NW
10
0.5
WNW
10
0.4
NW
10
0.5
NW
10
0.6
NW
9
0.6
NW
9
0.6
WNW
10
0.5
NW
9
0.4
WNW
9
0.4
NW
8
0.6
NNW
5
0.6
N
5
0.8
NNW
6
0.5
NW
9
Wave Graph
Metric surfscale
Energy kJ
272
168
104
414
286
225
196
208
52
37
47
52
67
61
39
30
17
22
21
34
42
Wind (km/h)
15
NW
5
WNW
5
WNW
10
NW
5
W
5
NNW
15
NW
10
SW
10
NE
10
NNW
10
SSW
10
ENE
15
N
10
WSW
5
N
10
NW
10
WSW
5
ENE
10
N
15
WSW
5
NNE
Wind State
on
on
on
on
glassy
cross-on
on
cross
cross
cross-on
cross-off
cross-off
cross-on
cross
glassy
on
cross
cross-off
cross-on
cross
cross
High Tide
7:04PM3.51m
7:25AM3.23m
7:39PM3.48m
8:00AM3.18m
8:15PM3.42m
8:38AM3.13m
8:53PM3.35m
9:20AM3.07m
9:36PM3.26m
10:08AM3.01m
10:27PM3.17m
11:04AM2.97m
11:29PM3.09m
12:10PM2.99m
Low Tide
1:16AM0.53m
1:23PM0.61m
1:52AM0.56m
1:59PM0.66m
2:30AM0.61m
2:38PM0.73m
3:10AM0.67m
3:21PM0.81m
3:55AM0.74m
4:11PM0.90m
4:48AM0.81m
5:11PM0.96m
5:51AM0.86m
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:30
6:30
6:31
6:31
6:31
6:33
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:50
9:50
9:50
9:50
9:49
9:49
9:49
9:47
 mm
Temp °C
20
20
19
21
20
20
23
22
23
30
25
28
35
30
27
30
26
29
34
24
26
Feels °C
19
20
21
22
21
22
23
22
22
28
24
26
33
30
27
28
26
28
32
23
26
Swell 1
Height (m)
Direction
Period (s)
1.3
NW
9
1.1
NW
9
0.8
NW
9
1.3
NW
11
1.2
NW
10
1.1
NW
10
1
WNW
10
1.1
NW
10
0.6
NNW
6
0.4
NW
10
0.8
NNW
5
0.6
NW
9
0.6
NW
9
0.8
N
5
0.5
NW
9
0.4
WNW
9
0.4
NNW
4
0.6
NNW
5
0.6
N
5
0.8
NNW
6
0.5
NNW
5
Energy kJ
272
168
104
414
286
225
196
208
24
37
36
52
67
34
39
30
7
22
21
34
15
Swell 2
Height (m)
Direction
Period (s)
0.6
NW
12
0.1
NW
13
0.3
NW
12
0.5
WNW
10
0.4
WNW
10
0.5
NW
10
0.5
N
5
0.6
WNW
10
0.5
N
5
0.4
NNW
5
0.4
NW
8
0.2
WNW
10
0.4
NW
7
0.4
NW
10
0.5
NW
9
Energy kJ
89
7
23
52
37
47
13
61
13
8
17
11
14
24
42
Swell 3
Height (m)
Direction
Period (s)
0.4
NW
11
0.1
NW
7
0.3
WNW
9
0.1
W
9
0.2
W
3
0.1
NW
11
0.2
WNW
8
0.2
WNW
10
Energy kJ
42
2
15
2
1
5
6
10
Wind waves
Height (m)
Direction
Period (s)
0.3
N
5
0.5
N
6
0.4
NNW
5
0.3
W
3
Energy kJ
5
15
8
2
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
12
12
12
87
0
26
12
12
1
87
2
1
50
17
1
530
78
21
490
17
6
Best forecast wave conditions in La Cote Basque
Rating
(10 max)
2
1
1
2
1
1
1
1
1
1
1
Best forecast wave conditions in France
Rating
(10 max)
2
1
1
1
2
2
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
5
9
5
9
5
7
5
5
9
7
7
6
9
8
6
6
7
9
7
7
9
  • 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 Guethary - Les Alcyons/Avalanche Surf forecast

The above surf forecast table for Guethary - Les Alcyons/Avalanche provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Guethary - Les Alcyons/Avalanche can be found by selecting the local surf guide option on the grey menu. Our Guethary - Les Alcyons/Avalanche 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 (Guethary - Les Alcyons/Avalanche) 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 Guethary - Les Alcyons/Avalanche 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.

Guethary - Les Alcyons/Avalanche is 9 km (6 miles) from Biarritz. If you plan a holiday in La Cote Basque, look for hotels and other accommodation in Biarritz. Biarritz has rooms for a wide range of budgets as well as car hire and transport links.

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