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 pm Friday 12 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
26.2° C
(Which is slightly warmer than usual)How big are the waves at Kosi Bay today?
The current surf forecast for Kosi Bay at 8PM is: 2.1m 7s primary swell from a Northeast direction and 0.7m 14s secondary swell from a South direction, 0.8m 14s secondary swell from a South direction (forecast issued at 01:00pm December 12). The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 3.5ft (1.0m) | 15s |
| Afternoon (12 Dec) | 3ft (0.9m) | 14s |
| Evening (12 Dec) | 7ft (2.1m) | 7s |
Table - waves today at Kosi Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| 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 | 5 AM | 8 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 15 | 15 | 6 | 7 | 7 | 7 | 8 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 10 | 7 | 8 | 8 | 9 | 9 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 418 | 339 | 301 | 391 | 471 | 381 | 114 | 228 | 457 | 352 | 236 | 164 | 169 | 181 | 321 | 475 | 496 | 367 | 258 | 215 | 173 | 136 | 133 | 108 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | cross- on | cross- on | cross | cross | glass | glass |
High Tide / height (m) | 9:17AM 1.57 | 9:40PM 1.41 | 10:40AM 1.53 | 11:13PM 1.40 | 11:58AM 1.55 | 12:30AM 1.46 | ||||||||||||||||||
Low Tide / height (m) | 3:36PM 0.82 | 3:57AM 0.75 | 5:06PM 0.82 | 5:22AM 0.76 | 6:22PM 0.75 | 6:33AM 0.70 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 4:48 | - | - | - | - | - | - | - | 4:48 | - | - | - | - | - | - | - | 4:48 | - |
| Sunset | - | - | 6:36 | - | - | - | - | - | - | - | 6:36 | - | - | - | - | - | - | - | 6:37 | - | - | - | - | - |
 | | |  | | | | | | |  |  | | |  | | | |  |  | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 4 | 1 | - | - | - | - | - |
| Temp. °C | 26 | 26 | 25 | 24 | 24 | 24 | 24 | 25 | 28 | 29 | 23 | 22 | 23 | 22 | 22 | 22 | 22 | 21 | 22 | 22 | 22 | 21 | 22 | 23 |
| Feels °C (?) | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 23 | 26 | 28 | 20 | 21 | 21 | 19 | 19 | 19 | 20 | 21 | 23 | 23 | 24 | 23 | 25 | 26 |
- 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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