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:
J-Bay surfForecast / Eastern Cape (S) / South Africa
48hr Weather and Surf, issued 7 am Thursday 11 Dec 2025 SASTForecast update in hr min s Forecast update imminent
J-Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's J-Bay sea temperature is
19.8° C
(Which is 1.6°C colder than average for this time of year)How big are the waves at J-Bay today?
The current surf forecast for J-Bay at 11AM is: 1.6m 10s primary swell from a South-southwest direction and 0.6m 13s secondary swell from a South direction, 1.3m 6s secondary swell from a East direction (forecast issued at 07:00am December 11). The wind direction is predicted to be onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Dec) | 5ft (1.6m) | 10s |
| Afternoon (11 Dec) | 4.5ft (1.4m) | 10s |
| Evening (11 Dec) | 7.5ft (2.3m) | 8s |
Table - waves today at J-Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 11 | Friday 12 | Saturday 13 | Sun 14 | |||||||||||||||||||||
| 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 10 | 7 | 8 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 17 | 9 | 10 | 11 | 11 | 14 | 14 | 14 | 13 | 13 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 565 | 601 | 530 | 340 | 394 | 681 | 823 | 664 | 522 | 369 | 340 | 252 | 208 | 424 | 764 | 1710 | 2854 | 4235 | 8129 | 8591 | 6596 | 4800 | 3858 | 3385 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | on | on | on | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | cross- off |
High Tide / height (m) | 8:29AM 1.30 | 8:45PM 1.09 | 9:40AM 1.25 | 10:09PM 1.03 | 10:54AM 1.24 | 11:35PM 1.05 | ||||||||||||||||||
Low Tide / height (m) | 2:53PM 0.58 | 2:51AM 0.52 | 4:15PM 0.61 | 4:05AM 0.58 | 5:35PM 0.58 | |||||||||||||||||||
Thursday 11 | Friday 12 | Saturday 13 | Sun 14 | |||||||||||||||||||||
| Sunrise | - | 5:01 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:23 | - | - | - | - | - | - | - | 7:24 | - | - | - | - | - | - | - | 7:25 | - | - | - |
 |  | | | |  | |  | |  |  | | | | | |  | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - |
| Temp. °C | 14 | 20 | 27 | 28 | 29 | 26 | 24 | 23 | 21 | 22 | 24 | 23 | 21 | 20 | 19 | 18 | 17 | 18 | 20 | 20 | 19 | 18 | 17 | 16 |
| Feels °C (?) | 12 | 19 | 26 | 26 | 25 | 27 | 23 | 17 | 16 | 18 | 20 | 21 | 19 | 18 | 16 | 15 | 12 | 12 | 13 | 13 | 13 | 16 | 15 | 14 |
- 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 J-Bay 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