- Forecast
- Maps
- Live
- Weather State
- Spot Information
Guethary - Les Alcyons/Avalanche Surf Forecast
/ La Cote Basque (36 surf breaks) /
Guethary - Les Alcyons/Avalanche surfForecast / La Cote Basque / France
12 Day Weather and Surf, issued 6 am Saturday 29 Mar 2025 CET
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 Saturday (Mar 29) at 4PM. The primary swell is predicted to be 6ft and 12s period with a secondary swell of 4ft and 7s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Guethary - Les Alcyons/Avalanche in the next 12 days are 7ft 12s and forecast to arrive on Saturday (Mar 29) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1ft 6s period and expected on Wednesday (Apr 02) at 11AM.
| Wave Type | Time (CET) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Sat 29th Mar) | 6ft (1.9m) 12s |
| Best Surf | 5AM (Sun 30th Mar) | 6.5ft (2.0m) 12s |
| Most Powerful | 7PM (Sat 29th Mar) | 7ft (2.2m) 12s |
Table - best surf conditions forecast for Guethary - Les Alcyons/Avalanche over the next 12 days.
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
| Wave Height (ft) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 13 | 12 | 12 | 11 | 12 | 11 | 11 | 11 | 12 | 16 | 14 | 12 | 12 | 11 | 11 | 12 | 11 | 10 | 10 | 10 | 10 | 9 | 10 | 16 | 15 | 14 | 13 | 13 | 12 | 12 | 11 | 10 | 10 | 12 | 16 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 828 | 1010 | 1076 | 756 | 528 | 568 | 515 | 415 | 486 | 215 | 493 | 304 | 203 | 140 | 95 | 177 | 157 | 95 | 51 | 50 | 46 | 31 | 17 | 69 | 284 | 238 | 295 | 400 | 496 | 615 | 396 | 322 | 142 | 137 | 144 | 586 |
Wind (mph) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross | glass | cross- on | glass | cross- off | cross | cross- off | cross- off | cross- on | cross- off | off | cross- off | cross- off | off | cross- off | off | glass | off | off | cross- off | cross- off | cross- off | off | glass | cross | glass | glass | cross | glass | cross- on | cross- on | cross- on | on | on |
High Tide / height (ft) | 4:32PM 13.19 | 4:49AM 14.11 | 5:12PM 13.48 | 5:31AM 14.04 | 5:52PM 13.39 | 6:14AM 13.45 | 6:34PM 12.89 | 7:00AM 12.47 | 7:19PM 12.07 | 7:51AM 11.19 | 8:11PM 11.06 | 8:52AM 9.91 | 9:17PM 10.04 | 10:15AM 8.96 | 10:49PM 9.42 | 11:57AM 8.73 | 12:26AM 9.51 | 1:18PM 9.15 | 1:36AM 10.11 | 2:13PM 9.78 | 2:26AM 10.73 | 2:54PM 10.43 | 3:05AM 11.29 | |||||||||||||
Low Tide / height (ft) | 10:17AM -0.85 | 10:31PM -0.66 | 10:57AM -1.12 | 11:13PM -0.92 | 11:37AM -0.85 | 11:56PM -0.72 | 12:19PM -0.16 | 12:41AM -0.07 | 1:03PM 0.89 | 1:29AM 0.95 | 1:51PM 2.1 | 2:26AM 2.13 | 2:49PM 3.28 | 3:38AM 3.18 | 4:07PM 4.17 | 5:13AM 3.74 | 5:44PM 4.36 | 6:45AM 3.51 | 7:06PM 3.87 | 7:48AM 2.92 | 8:01PM 3.15 | 8:32AM 2.26 | 8:42PM 2.43 | |||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | |||||||||||||||||||||||||
| Sunrise | 6:54 | - | - | 6:52 | - | - | 6:50 | - | - | 6:48 | - | - | 6:47 | - | - | 6:45 | - | - | 6:43 | - | - | 6:41 | - | - | 6:39 | - | - | 6:37 | - | - | 6:37 | - | - | 6:35 | - | - |
| Sunset | - | 7:28 | - | - | 7:29 | - | - | 7:30 | - | - | 7:31 | - | - | 7:32 | - | - | 7:34 | - | - | 7:35 | - | - | 7:37 | - | - | 7:37 | - | - | 7:38 | - | - | 7:39 | - | - | 7:40 | - |
 |  |  | | | | | | | | | |  | |  | | |  | |  | | | | | | |  | | | | | | | | | | |
Rain (in) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0.0 | - | - | - | - | - | - | 0.1 | - | - | - | - | - | 0.1 | - | - | 0.1 |
| Temp. °F | 52 | 52 | 50 | 52 | 54 | 50 | 59 | 64 | 54 | 63 | 63 | 50 | 55 | 61 | 54 | 64 | 68 | 61 | 63 | 64 | 59 | 68 | 70 | 63 | 68 | 72 | 63 | 59 | 59 | 57 | 61 | 64 | 61 | 55 | 57 | 55 |
| Feels °F (?) | 41 | 43 | 43 | 46 | 46 | 48 | 54 | 61 | 48 | 59 | 59 | 41 | 50 | 55 | 48 | 59 | 64 | 57 | 61 | 59 | 55 | 63 | 66 | 59 | 64 | 70 | 59 | 55 | 57 | 55 | 59 | 63 | 61 | 52 | 52 | 52 |
Short Range Forecast: Mostly dry. Very mild (max 64°F on Mon afternoon, min 45°F on Sat night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 68°F on Thu afternoon, min 46°F on Tue night). Wind will be generally light. | Days 6-9 Weather Summary Light rain (total 0.1in), mostly falling on Fri afternoon. Warm (max 72°F on Sun afternoon, min 55°F on Fri night). Wind will be generally light. | Long Range Forecast: Light rain (total 0.2in), mostly falling on Tue night. Very mild (max 64°F on Tue afternoon, min 54°F on Wed night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
Join to view 12 day and hourly surf forecasts
- Map Icons:
Break
Live Wave Height (ft)
Live Wind Speed (mph)
Surf Rating (10 Max)
Ocean Swells (ft)- Wind Speed (mph)
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 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.
Nearest