Guethary - Les Alcyons/Avalanche Surf Forecast

/ La Cote Basque (36 surf breaks) /

France (410 surf breaks) / Lat Long: (43.43° N 1.62° W)

Surf Forecasts:

Guethary - Les Alcyons/Avalanche surfForecast / La Cote Basque / France

12 Day Weather and Surf, issued 7 pm Wednesday 15 Oct 2025 CEST

Forecast update in hr min s Forecast update imminent

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

Today's Guethary - Les Alcyons/Avalanche sea temperature is 19.7° C
(Which is 2.2°C warmer than normal for this time of year)

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

The surf forecast for Guethary - Les Alcyons/Avalanche over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Oct 16) at 2AM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.4m and 5s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Guethary - Les Alcyons/Avalanche in the next 12 days are 2.5m 10s and forecast to arrive on Wednesday (Oct 22) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Oct 20) at 8AM.

Wave Type	Time (CEST) & Date	Wave Height & Period
Next good surf (1 star+)	2AM (Thu 16th Oct)	2ft (0.6m) 11s
Best Surf	5AM (Tue 21st Oct)	7ft (2.2m) 10s
Most Powerful	2AM (Wed 22nd Oct)	8ft (2.5m) 10s

Table - best surf conditions forecast for Guethary - Les Alcyons/Avalanche over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Mostly dry. Warm (max 26°C on Sat afternoon, min 14°C on Wed night). Wind will be generally light.										Days 3-6 Weather Summary Moderate rain (total 18mm), heaviest on Mon morning. Warm (max 24°C on Sat night, min 14°C on Tue morning). Wind will be generally light.
		Thursday 16			Friday 17			Saturday 18			Sunday 19			Monday 20			Tuesday 21			Wed 22
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	1	1	0	1	0	0	0	0	0	0	0	0	0	0	0	0	3	2	3	3	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	WNW	NW	NW	NW	NW	WNW
Period(s) (?)	11	15	13	12	11	11	10	10	10	10	12	11	10	10	9	9	10	10	10	10	9
Wave Graph (?)
kJ (?)	91	121	156	127	47	23	21	10	9	21	77	93	82	109	194	565	934	784	1365	723	238
Wind (km/h)	SSW	ESE	N	SSW	SE	N	S	SSE	ESE	SSW	SSE	S	SSW	W	W	WSW	SSW	W	SW	S	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	glass	glass	cross- on	cross- off	off	cross- on	cross- off	cross- off	glass	cross- off	cross- off	cross- off	cross- off	cross- on	cross- on	cross- on	cross- off	cross- on	cross	cross- off	cross
High Tide / height (m)	1:44AM 2.82		2:04PM 3.13	2:44AM 3.02		2:59PM 3.32	3:29AM 3.22		3:41PM 3.47	4:05AM 3.39		4:17PM 3.59	4:37AM 3.52		4:49PM 3.65		5:06AM 3.60	5:19PM 3.66		5:34AM 3.64	5:48PM 3.62
Low Tide / height (m)		7:33AM 1.13		8:19PM 0.83	8:34AM 0.92		9:07PM 0.64	9:19AM 0.70		9:45PM 0.47	9:56AM 0.52		10:18PM 0.35	10:30AM 0.38		10:49PM 0.28	11:03AM 0.30		11:19PM 0.27	11:35AM 0.27

		Thursday 16			Friday 17			Saturday 18			Sunday 19			Monday 20			Tuesday 21			Wed 22
Sunrise	-	8:19	-	-	8:22	-	-	8:22	-	-	8:23	-	-	8:25	-	-	8:26	-	-	8:27	-
Sunset	-	-	7:22	-	-	7:21	-	-	7:19	-	-	7:16	-	-	7:15	-	-	7:14	-	-	7:13

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	1	10	2	4	-	1	4	-	-
Temp. °C	15	16	19	17	17	23	20	19	26	24	20	23	20	17	17	17	16	19	18	19	25
Feels °C (?)	16	16	19	18	16	22	19	18	26	22	18	21	18	15	14	15	14	18	16	19	23

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for La Cote Basque

Wind Update Continuing clean conditions at Guethary - Les Alcyons/Avalanche (calm at Biarritz/Anglet Airport 9 km from Guethary - Les Alcyons/Avalanche). 0.6m 11s groundswell from the WNW to make surfable waves.
1 hour 5 minutes ago Guethary - Les Alcyons/Avalanche

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1 h 5 min ago

4 km/h

SSW

Clean

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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 12 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.