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:
Kosi Bay surfForecast / KZN North / South Africa
48hr Weather and Surf, issued 1 am Thursday 11 Dec 2025 SASTForecast update in hr min s Forecast update imminent
Kosi Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kosi Bay sea temperature is
26.0° C
(Which is slightly warmer than usual)How big are the waves at Kosi Bay today?
The current surf forecast for Kosi Bay at 6AM is: 1.9m 7s primary swell from a Southeast direction and 0.4m 15s secondary swell from a South-southwest direction, 0.5m 14s secondary swell from a South-southwest direction (forecast issued at 01:00am December 11). The wind direction is predicted to be onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Dec) | 5ft (1.5m) | 7s |
| Afternoon (11 Dec) | 5ft (1.6m) | 7s |
| Evening (11 Dec) | 2.5ft (0.8m) | 14s |
Table - waves today at Kosi Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 11 | Friday 12 | Saturday 13 | ||||||||||||||||||||||
| 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 | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 14 | 14 | 14 | 15 | 15 | 15 | 6 | 7 | 7 | 7 | 7 | 8 | 7 | 7 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 186 | 288 | 352 | 198 | 247 | 234 | 216 | 206 | 338 | 416 | 416 | 422 | 418 | 339 | 322 | 406 | 371 | 671 | 404 | 138 | 470 | 352 | 231 | 159 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | on | cross |
High Tide / height (m) | 8:07AM 1.67 | 8:21PM 1.51 | 9:17AM 1.57 | 9:40PM 1.41 | 10:40AM 1.53 | |||||||||||||||||||
Low Tide / height (m) | 1:39AM 0.52 | 2:20PM 0.72 | 2:39AM 0.66 | 3:36PM 0.82 | 3:57AM 0.75 | 5:06PM 0.82 | ||||||||||||||||||
Thursday 11 | Friday 12 | Saturday 13 | ||||||||||||||||||||||
| Sunrise | - | - | 4:47 | - | - | - | - | - | - | - | 4:47 | - | - | - | - | - | - | - | 4:48 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:35 | - | - | - | - | - | - | - | 6:36 | - | - | - | - | - | - | - | 6:36 | - |
 | |  |  |  | | |  |  | |  | | | | | | | | | | | | |  | |
Rain (mm) | 1 | 2 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 |
| Temp. °C | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 22 | 24 | 27 | 27 | 25 | 24 | 24 | 24 | 24 | 25 | 29 | 30 | 26 | 23 |
| Feels °C (?) | 23 | 21 | 21 | 21 | 23 | 24 | 22 | 22 | 23 | 24 | 22 | 22 | 24 | 25 | 22 | 21 | 22 | 22 | 23 | 23 | 28 | 30 | 28 | 22 |
- 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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