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Guethary - Les Alcyons/Avalanche Surf Forecast
/ La Cote Basque (36 surf breaks) /
Surf Forecasts:
Guethary - Les Alcyons/Avalanche surfForecast / La Cote Basque / France
16 Day Weather and Surf, issued 7 pm Thursday 09 Apr 2026 CESTForecast 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
14.6° C
(Which is 1.9°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 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Apr 10) at 11AM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 0.9m and 16s. 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 4.0m 15s and forecast to arrive on Sunday (Apr 12) at 5PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Fri 10th Apr) | 4.5ft (1.4m) 11s |
| Best Surf | 8AM (Sun 12th Apr) | 11ft (3.5m) 16s |
| Most Powerful | 5PM (Sun 12th Apr) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Guethary - Les Alcyons/Avalanche over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 41mm), heaviest during Sat night. Warm (max 23°C on Fri afternoon, min 3°C on Sat night). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 7mm), mostly falling on Sun night. Very mild (max 15°C on Mon night, min 9°C on Sun night). Wind will be generally light. | |||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thu 16 | ||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | ||
Rating (10 max) | ||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||
| Period(s) (?) | 12 | 11 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 14 | 13 | 12 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 11 | |
Wave (?)Graph  | ||||||||||||||||||||||
 kJ (?) | 505 | 471 | 2491 | 2521 | 1637 | 1150 | 5227 | 6288 | 6512 | 5373 | 3469 | 2140 | 1599 | 1775 | 1220 | 705 | 759 | 698 | 579 | 550 | 387 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | glass | cross- off | cross- off | cross- on | cross- on | off | off | on | cross- on | cross- on | glass | cross- off | cross- on | on | glass | glass | on | glass | cross | cross- on | |
High Tide / height (m) | 10:06PM 2.67 | 10:56AM 2.44 | 11:38PM 2.58 | 12:41PM 2.46 | 1:12AM 2.69 | 1:58PM 2.65 | 2:14AM 2.94 | 2:48PM 2.92 | 3:01AM 3.23 | 3:29PM 3.22 | 3:41AM 3.53 | 4:07PM 3.51 | 4:20AM 3.79 | 4:45PM 3.76 | ||||||||
Low Tide / height (m) | 4:43AM 1.39 | 5:11PM 1.50 | 6:17AM 1.41 | 6:45PM 1.44 | 7:36AM 1.22 | 7:54PM 1.23 | 8:30AM 0.94 | 8:44PM 0.94 | 9:13AM 0.62 | 9:26PM 0.64 | 9:52AM 0.32 | 10:06PM 0.35 | 10:30AM 0.08 | |||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thu 16 | ||||||||||||||||
| Sunrise | - | 7:33 | - | - | 7:31 | - | - | 7:30 | - | - | 7:28 | - | - | 7:26 | - | - | 7:24 | - | - | 7:22 | - | |
| Sunset | - | - | 8:42 | - | - | 8:44 | - | - | 8:45 | - | - | 8:45 | - | - | 8:46 | - | - | 8:47 | - | - | 8:50 | |
 |  | |  |  | |  | | |  |  | |  | | | | | | | | | ||
Rain (mm) | - | - | - | - | 1 | 2 | 37 | 1 | - | 2 | 2 | - | 2 | 1 | - | - | - | - | - | - | - | |
| Temp. °C | 14 | 14 | 23 | 22 | 13 | 13 | 7 | 6 | 10 | 10 | 11 | 14 | 15 | 13 | 13 | 13 | 12 | 15 | 14 | 13 | 16 | |
| Feels °C (?) | 12 | 14 | 21 | 21 | 10 | 10 | 2 | 3 | 7 | 7 | 8 | 12 | 12 | 9 | 10 | 12 | 11 | 13 | 13 | 12 | 14 | |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Guethary - Les Alcyons/Avalanche surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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