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 5 pm Friday 12 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
12.4° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Maenporth today?
The current surf forecast for Maenporth at 12AM is: 4.5m 18s primary swell from a West-southwest direction (forecast issued at 05:00pm December 12). The wind direction is predicted to be cross-offshore and the swell rating is 11.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | - | - |
| Afternoon (13 Dec) | 18ft (5.5m) | 18s |
| Evening (13 Dec) | 16ft (5.0m) | 18s |
Table - waves today at Maenporth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| 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 | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 18 | 18 | 18 | 18 | 17 | 16 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 19417 | 17089 | 14952 | 13337 | 11561 | 8554 | 6826 | 5502 | 3720 | 3163 | 2826 | 2528 | 2628 | 0 | 3315 | 0 | 4369 | 4908 | 3821 | 4904 | 4023 | 3530 | 3303 | 3585 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- off | glass |
High Tide / height (m) | 11:50PM 3.91 | 12:14PM 4.30 | 12:49AM 3.92 | 1:11PM 4.25 | 1:42AM 4.00 | |||||||||||||||||||
Low Tide / height (m) | 5:34PM 1.70 | 5:48AM 1.90 | 6:46PM 1.84 | 7:06AM 1.97 | 7:57PM 1.85 | 8:18AM 1.91 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 8:10 | - | - | - | - | - | - | - | 8:11 | - | - | - | - | - | - | - | 8:11 | - |
| Sunset | 4:16 | - | - | - | - | - | - | - | 4:16 | - | - | - | - | - | - | - | 4:16 | - | - | - | - | - | - | - |
 |  | | |  | |  |  | |  | | | | | | | | | | |  |  |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3 | 7 | 8 | 6 |
| Temp. °C | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 11 | 11 | 10 |
| Feels °C (?) | 7 | 8 | 7 | 7 | 7 | 7 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 4 | 4 | 5 | 5 | 8 | 9 |
- 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