Guethary - Les Alcyons/Avalanche Surf Break

Lat Long: 43.43° N 1.62° W

Guethary - Les Alcyons/Avalanche Surf Forecast and Surf Report

Issued: 1 pm 30 Jul 2026 (local time)

Forecast update in  hr  min

Today's Guethary - Les Alcyons/Avalanche sea temperature is
24.3° C
2.8° 

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 30 Jul 2026:

  • Most powerful swell: Thursday 30 Jul, 8PM (local time) - 2.5ft (0.8m), 9s period, NW swell with 91 kJ wave energy.

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

The most powerful waves expected at Guethary - Les Alcyons/Avalanche in the next 16 days are 0.8m 9s and forecast to arrive on Thursday (Jul 30) at 8PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (CEST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Thu 30th Jul)2.5ft (0.8m) 9s

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


The Lowdown

Alright, folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks.

Honestly, it’s a tough stretch ahead. We’re looking at a real dry spell with nothing but poor surf conditions across the entire 16-day window. There’s no standout day, no session to get excited about. The whole period is a blank run.

Right now, the water is sitting at 76°F – that’s much warmer than normal for this time of year, a real anomaly of nearly 5°F, so you’ll be comfortable in a spring suit at Guethary - Les Alcyons/Avalanche (France).

The first record shows Thursday afternoon, 30th July, with a tiny 3ft NW swell and a weak combined energy of only 86. The wind is a light onshore breeze, just messing up what little there is. It’s not worth paddling out for.

Friday morning, 31st July, the swell drops to 2ft from the WNW, and while the wind goes glassy, the surf is still rated as poor. The energy is down to 48. You might get a few clean but tiny waves on a longboard, nothing more.

The rest of the first week is more of the same. Through the weekend and into the start of August, the swell never gets above 3ft, and the wind is almost always onshore or cross-onshore from the NW. The combined energy is weak, staying in the two-digit numbers. It’s a frustrating time for anyone who wants to paddle.

Moving into the second week, from the 5th of August onward, it gets even smaller. We’re looking at 0.7ft to 1ft swells, with periods that are sometimes short (4 to 6 seconds) and sometimes a bit longer (9 to 11 seconds), but the energy is pitiful, dropping to single digits by the 10th. The wind is a mix of glassy mornings and choppy onshore afternoons, but the lack of swell means those glassy sessions are flat.

By the 12th and 13th of August, there’s a slight bump to 3ft, but it’s still onshore wind and poor conditions. The energy hits 59, which is still weak. It’s a tease.

The reality is this spot is exposed to the W, and the optimum swell direction is W, but we’re getting a lot of NW and NNW energy that isn’t lining up well. The consistency is usually good here, but these forecasts show a total shutdown. For now, it’s more interesting for kite surfing than paddle surfing, if you’ve got the gear.

We’ll keep an eye on it – it tends not to stay poor for long, but for now, find something else to do.

Rusty

Short Range Forecast

Mostly dry. Warm (max 22°C on Thu afternoon, min 18°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

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

Thu
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
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
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)
0.8
NW
8
0.7
NW
8
0.6
WNW
8
0.5
NW
8
0.6
NW
8
0.8
NW
8
0.6
NW
8
0.6
NNW
6
0.8
NNW
6
0.7
NNW
6
0.6
NW
6
0.3
WNW
10
0.3
WNW
10
0.3
WNW
10
0.4
WNW
9
0.4
WNW
9
0.4
WNW
9
0.4
NW
6
0.3
WNW
8
0.3
WNW
8
Wave Graph
Metric surfscale
Energy kJ
86
69
45
32
46
77
45
25
41
29
27
19
19
18
27
26
26
14
13
12
Wind (km/h)
10
NNW
10
N
5
NNW
15
NW
5
NNE
5
N
15
NW
10
WSW
5
NW
10
NW
10
WSW
15
W
10
NW
5
SSW
5
N
15
NW
5
SW
5
NE
15
N
20
W
Wind State
on
cross-on
glassy
on
glassy
cross-on
on
cross
on
on
cross-on
cross-on
on
cross-off
glassy
on
cross-off
cross
cross-on
cross-on
High Tide
6:10PM3.65m
6:29AM3.42m
6:42PM3.71m
7:01AM3.45m
7:14PM3.71m
7:33AM3.44m
7:47PM3.66m
8:08AM3.39m
8:23PM3.55m
8:46AM3.30m
9:03PM3.40m
9:30AM3.18m
9:53PM3.21m
Low Tide
00:19AM0.35m
12:26PM0.39m
00:52AM0.31m
12:59PM0.37m
1:25AM0.31m
1:33PM0.40m
1:59AM0.36m
2:09PM0.48m
2:36AM0.46m
2:49PM0.60m
3:18AM0.62m
3:37PM0.76m
4:09AM0.80m
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:54
6:56
6:56
6:58
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:30
9:30
9:29
9:28
9:27
9:24
9:23
 mm
Temp °C
22
22
21
22
21
20
22
21
21
23
22
21
22
22
21
23
22
22
25
23
Feels °C
23
23
23
22
22
21
21
21
21
22
21
21
22
24
22
23
22
24
26
25
  • 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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