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:
Maenporth surfForecast / Cornwall (South) / UK
48hr Weather and Surf, issued 11 pm Sunday 14 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Maenporth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Maenporth sea temperature is
12.3° C
(Which is slightly warmer than usual)How big are the waves at Maenporth today?
The current surf forecast for Maenporth at 2AM is: 4.0m 13s primary swell from a Southwest direction and 3.5m 13s secondary swell from a West-southwest direction (forecast issued at 11:00pm December 14). The wind direction is predicted to be cross-onshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 13ft (4.0m) | 13s |
| Afternoon (15 Dec) | 10ft (3.0m) | 14s |
| Evening (15 Dec) | 5.5ft (1.7m) | 8s |
Table - waves today at Maenporth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| 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) (?) | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 14 | 4 | 13 | 13 | 8 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 4098 | 5498 | 5811 | 5885 | 5759 | 3102 | 3156 | 222 | 368 | 270 | 196 | 176 | 116 | 83 | 60 | 31 | 17 | 9 | 2468 | 10 | 1641 | 1162 | 843 | 565 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | cross- off | cross- off | cross | cross | cross | cross- on | cross- on | cross- on |
High Tide / height (m) | 1:42AM 4.00 | 2:01PM 4.24 | 2:29AM 4.13 | 2:47PM 4.26 | 3:11AM 4.29 | 3:28PM 4.31 | ||||||||||||||||||
Low Tide / height (m) | 7:57PM 1.85 | 8:18AM 1.91 | 8:54PM 1.76 | 9:16AM 1.78 | 9:40PM 1.64 | 10:02AM 1.63 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 8:11 | - | - | - | - | - | - | - | 8:12 | - | - | - | - | - | - | - | 8:12 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:16 | - | - | - | - | - | - | - | 4:17 | - | - | - | - | - | - | - | 4:17 | - |
 |  |  | |  | |  | | | | | |  | |  |  | | | | | | | | | |
Rain (mm) | - | 2 | 6 | 8 | 8 | 6 | 5 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 12 | 11 | 11 | 10 | 11 | 11 | 11 | 10 | 9 | 9 | 9 | 9 | 10 | 10 | 9 | 8 | 8 | 9 | 9 | 10 | 11 | 11 | 11 |
| Feels °C (?) | 4 | 4 | 3 | 2 | 3 | 6 | 5 | 8 | 4 | 3 | 4 | 3 | 5 | 6 | 6 | 6 | 6 | 5 | 5 | 4 | 3 | 3 | 3 | 2 |
- 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 Maenporth 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