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 Friday 12 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
19.3° C
(Which is 2.2°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 2PM is: 1.1m 10s primary swell from a East direction and 1.5m 7s secondary swell from a Southwest direction (forecast issued at 07:00am December 12). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 7ft (2.2m) | 7s |
| Afternoon (12 Dec) | 3.5ft (1.0m) | 10s |
| Evening (12 Dec) | 3.5ft (1.0m) | 17s |
Table - waves today at J-Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| 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 | 7 | 10 | 7 | 17 | 9 | 10 | 12 | 11 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 463 | 375 | 408 | 247 | 162 | 424 | 734 | 1606 | 3177 | 4235 | 4125 | 4340 | 4648 | 4192 | 3619 | 3267 | 2938 | 2497 | 2331 | 2032 | 1860 | 1632 | 1513 | 1742 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | cross- off | glass | cross- on | cross- on | cross- on | on | glass | off |
High Tide / height (m) | 9:40AM 1.25 | 10:09PM 1.03 | 10:54AM 1.24 | 11:35PM 1.05 | 12:00PM 1.26 | 12:40AM 1.11 | ||||||||||||||||||
Low Tide / height (m) | 4:15PM 0.61 | 4:05AM 0.58 | 5:35PM 0.58 | 5:23AM 0.59 | 6:36PM 0.52 | |||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | - | 5:01 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:24 | - | - | - | - | - | - | - | 7:25 | - | - | - | - | - | - | - | 7:25 | - | - | - |
 |  | | |  |  | |  |  | | | | | | | | |  | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 21 | 21 | 23 | 25 | 22 | 20 | 18 | 17 | 17 | 18 | 19 | 20 | 19 | 18 | 17 | 16 | 15 | 17 | 19 | 20 | 19 | 18 | 18 | 17 |
| Feels °C (?) | 18 | 16 | 19 | 23 | 21 | 17 | 15 | 13 | 12 | 11 | 11 | 13 | 13 | 15 | 15 | 14 | 13 | 16 | 16 | 16 | 16 | 16 | 19 | 16 |
- 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