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:
Johnshaven surfForecast / Scot – East Coast / UK
48hr Weather and Surf, issued 5 pm Tuesday 16 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Johnshaven surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Johnshaven sea temperature is
9.5° C
(Which is slightly warmer than usual)How big are the waves at Johnshaven today?
The current surf forecast for Johnshaven at 1AM is: 0.5m 6s primary swell from a Southeast direction and 0.7m 4s secondary swell from a South-southwest direction (forecast issued at 05:00pm December 16). The wind direction is predicted to be cross-shore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 6ft (1.9m) | 6s |
| Afternoon (17 Dec) | 7ft (2.2m) | 7s |
| Evening (17 Dec) | 6ft (1.9m) | 7s |
Table - waves today at Johnshaven. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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) (?) | 7 | 7 | 6 | 6 | 4 | 5 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 7 | 6 | 6 | 6 | 8 | 9 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 59 | 37 | 27 | 18 | 17 | 100 | 253 | 230 | 432 | 588 | 379 | 373 | 262 | 282 | 232 | 226 | 208 | 237 | 139 | 87 | 177 | 376 | 309 | 335 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross | cross | cross | cross- on | cross- on | cross | cross- on | cross- on | cross | cross | cross | cross | cross- off | cross- on | cross- on | on | cross | cross | cross | cross | cross | cross |
High Tide / height (m) | 11:33PM 3.36 | 11:57AM 3.43 | 12:18AM 3.46 | 12:36PM 3.53 | 1:00AM 3.54 | |||||||||||||||||||
Low Tide / height (m) | 5:19PM 1.13 | 5:39AM 1.00 | 6:02PM 0.96 | 6:20AM 0.93 | 6:41PM 0.80 | 6:58AM 0.87 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 8:41 | - | - | - | - | - | - | - | 8:41 | - | - | - | - | - | - | - | 8:41 | - |
| Sunset | 3:27 | - | - | - | - | - | - | - | 3:27 | - | - | - | - | - | - | - | 3:29 | - | - | - | - | - | - | - |
 |  | | |  | |  | |  | | | |  | | | | |  | | | | | |  | |
Rain (mm) | - | - | - | - | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - | 3 | 3 | - | - | - | - | - |
| Temp. °C | 5 | 4 | 4 | 4 | 5 | 7 | 7 | 9 | 10 | 10 | 9 | 8 | 8 | 7 | 7 | 7 | 8 | 8 | 8 | 7 | 7 | 8 | 8 | 7 |
| Feels °C (?) | 0 | -1 | -1 | -2 | -2 | -2 | -2 | 1 | 2 | 3 | 3 | 3 | 1 | -1 | -2 | 0 | 1 | -1 | 1 | -3 | -4 | -4 | -3 | -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 Johnshaven 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