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 Monday 15 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
18.4° C
(Which is 3.2°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: 3.0m 12s primary swell from a Southwest direction and 0.6m 8s secondary swell from a East direction (forecast issued at 07:00am December 15). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 10ft (3.0m) | 12s |
| Afternoon (15 Dec) | 10ft (3.0m) | 12s |
| Evening (15 Dec) | 10ft (3.0m) | 12s |
Table - waves today at J-Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| 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) (?) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 10 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2436 | 2397 | 2233 | 2269 | 2418 | 2379 | 2257 | 2142 | 2032 | 1789 | 1638 | 1427 | 1403 | 1229 | 1141 | 1074 | 929 | 1355 | 1243 | 1473 | 1249 | 1264 | 1108 | 445 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- on | cross- on | cross- on | cross- on | cross- on | glass | glass | glass | cross- on | cross- on | cross- on | cross- on | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | glass | glass |
High Tide / height (m) | 12:52PM 1.30 | 1:29AM 1.18 | 1:35PM 1.35 | 2:08AM 1.26 | 2:14PM 1.41 | |||||||||||||||||||
Low Tide / height (m) | 6:29AM 0.56 | 7:22PM 0.45 | 7:20AM 0.51 | 8:00PM 0.37 | 8:02AM 0.44 | 8:34PM 0.31 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| Sunrise | - | 5:01 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:27 | - | - | - | - | - | - | - | 7:28 | - | - | - | - | - | - | - | 7:28 | - | - | - |
 |  |  | | |  | | | | | | | | |  | | | | | |  |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - |
| Temp. °C | 17 | 20 | 22 | 21 | 21 | 19 | 19 | 18 | 18 | 21 | 24 | 22 | 21 | 20 | 19 | 19 | 19 | 22 | 21 | 20 | 18 | 18 | 17 | 17 |
| Feels °C (?) | 17 | 20 | 21 | 19 | 21 | 20 | 21 | 19 | 19 | 21 | 22 | 20 | 21 | 21 | 19 | 18 | 16 | 16 | 16 | 14 | 14 | 16 | 17 | 17 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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