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:
Gwithian surfForecast / Cornwall (North) / UK
48hr Weather and Surf, issued 11 pm Saturday 13 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Gwithian surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Gwithian sea temperature is
12.3° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Gwithian today?
The current surf forecast for Gwithian at 3AM is: 3.0m 13s primary swell from a West direction (forecast issued at 11:00pm December 13). The wind direction is predicted to be cross-shore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | 11ft (3.5m) | 13s |
| Afternoon (14 Dec) | 11ft (3.5m) | 13s |
| Evening (14 Dec) | 11ft (3.5m) | 13s |
Table - waves today at Gwithian. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 14 | Monday 15 | Tuesday 16 | ||||||||||||||||||||||
| 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 13 | 13 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3504 | 2914 | 3168 | 3359 | 3891 | 4699 | 3622 | 3612 | 3834 | 3785 | 3397 | 3638 | 4072 | 2920 | 3201 | 3361 | 3180 | 3269 | 3344 | 3436 | 3681 | 3344 | 3253 | 3029 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross- off | cross | cross | cross- on | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 12:30AM 4.55 | 12:57PM 4.70 | 1:31AM 4.63 | 1:55PM 4.76 | 2:24AM 4.80 | 2:45PM 4.89 | ||||||||||||||||||
Low Tide / height (m) | 6:25PM 1.72 | 6:50AM 1.86 | 7:26PM 1.73 | 7:51AM 1.79 | 8:19PM 1.64 | 8:44AM 1.64 | ||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 8:12 | - | - | - | - | - | - | - | 8:12 | - | - | - | - | - | - | - | 8:14 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:17 | - | - | - | - | - | - | - | 4:17 | - | - | - | - | - | - | - | 4:17 | - |
 |  |  | |  | | | |  | |  | |  |  | | | | | | |  | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | 1 | 3 | 7 | 8 | 6 | 2 | 2 | 2 | 6 | 2 | - | - | - | - | - | - |
| Temp. °C | 10 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 8 | 9 | 9 | 10 | 10 | 10 | 9 | 9 |
| Feels °C (?) | 3 | 3 | 3 | 4 | 3 | 3 | 4 | 3 | 3 | 2 | 2 | 4 | 7 | 7 | 6 | 5 | 0 | 2 | 2 | 3 | 4 | 5 | 4 | 5 |
- 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 Gwithian 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