Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:
Guethary - Les Alcyons/Avalanche surfForecast / La Cote Basque / France
48hr Weather and Surf, issued 6 pm Sunday 14 Dec 2025 CETForecast 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
14.9° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Guethary - Les Alcyons/Avalanche today?
The current surf forecast for Guethary - Les Alcyons/Avalanche at 2AM is: 2.0m 13s primary swell from a West-northwest direction (forecast issued at 06:00pm December 14). The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (CET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 7ft (2.1m) | 13s |
| Afternoon (15 Dec) | 6ft (1.9m) | 13s |
| Evening (15 Dec) | 6ft (1.8m) | 13s |
Table - waves today at Guethary - Les Alcyons/Avalanche. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 13 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1327 | 1288 | 1269 | 1422 | 1590 | 1493 | 1449 | 1363 | 1188 | 1077 | 1060 | 980 | 934 | 2550 | 2414 | 2513 | 2547 | 2479 | 2729 | 2803 | 3066 | 3023 | 2764 | 2613 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | cross- off | cross- off | off | off | off | cross- off | off | off | off | cross- off | off | cross- off | cross- off | glass | glass | glass | cross- on | cross | cross- on | on | on | on |
High Tide / height (m) | 1:07AM 2.89 | 1:28PM 2.94 | 1:55AM 3.01 | 2:15PM 3.02 | 2:37AM 3.13 | |||||||||||||||||||
Low Tide / height (m) | 6:38PM 1.01 | 7:03AM 1.06 | 7:28PM 0.96 | 7:53AM 0.95 | 8:13PM 0.88 | 8:38AM 0.82 | ||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 8:30 | - | - | - | - | - | - | - | 8:32 | - | - | - | - | - | - | - | 8:33 | - |
| Sunset | 5:30 | - | - | - | - | - | - | - | 5:30 | - | - | - | - | - | - | - | 5:30 | - | - | - | - | - | - | - |
 |  | | |  |  |  |  | | | | | | | | | | | |  | |  |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | - |
| Temp. °C | 15 | 13 | 12 | 12 | 12 | 12 | 14 | 16 | 16 | 13 | 13 | 13 | 13 | 13 | 13 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 13 | 13 |
| Feels °C (?) | 13 | 11 | 9 | 9 | 9 | 9 | 11 | 14 | 13 | 11 | 10 | 10 | 11 | 11 | 11 | 14 | 13 | 13 | 12 | 11 | 12 | 11 | 12 | 12 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Vancouver Island’s Day Of Days With Reed Platenius
Surf-Forecast recently helped the 21-year-old Canadian pro surfer and adventurer score some cold water perfection at home.
Read more
Discover more articles and updates in the Greenroom.
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.
Nearest