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:
Gansbaai surfForecast / Overberg / South Africa
48hr Weather and Surf, issued 1 am Thursday 11 Dec 2025 SASTForecast update in hr min s Forecast update imminent
Gansbaai surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Gansbaai sea temperature is
17.3° C
(Which is 1.9°C colder than average for this time of year)How big are the waves at Gansbaai today?
The current surf forecast for Gansbaai at 7AM is: 1.3m 10s primary swell from a South-southwest direction and 0.3m 14s secondary swell from a Southwest direction (forecast issued at 01:00am December 11). An open ocean swell of 1.2m 6s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Dec) | 4.5ft (1.3m) | 10s |
| Afternoon (11 Dec) | 4ft (1.2m) | 9s |
| Evening (11 Dec) | 3.5ft (1.1m) | 9s |
Table - waves today at Gansbaai. (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) (?) | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 19 | 18 | 18 | 17 | 9 | 16 | 10 | 10 | 14 | 14 | 14 | 12 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 450 | 408 | 256 | 314 | 295 | 253 | 226 | 221 | 172 | 303 | 491 | 781 | 1145 | 1367 | 7505 | 2410 | 2522 | 7702 | 10521 | 4800 | 3304 | 5259 | 4636 | 3978 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | cross | cross- on | cross- on | on | on | on | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | on | on | cross- on |
High Tide / height (m) | 8:15AM 1.29 | 8:43PM 1.07 | 9:21AM 1.25 | 10:03PM 1.03 | 10:29AM 1.23 | |||||||||||||||||||
Low Tide / height (m) | 1:42AM 0.44 | 2:49PM 0.52 | 2:46AM 0.53 | 4:06PM 0.53 | 3:59AM 0.58 | 5:16PM 0.51 | ||||||||||||||||||
Thursday 11 | Friday 12 | Saturday 13 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:22 | - | - | - | - | - | - | - | 5:22 | - | - | - | - | - | - | - | 5:22 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:47 | - | - | - | - | - | - | - | 7:49 | - | - | - | - | - | - | - | 7:49 | - |
 | | |  | | | |  |  | | | |  |  |  |  | |  | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 1 | 2 | 1 | - | - | - | - | - | - |
| Temp. °C | 18 | 17 | 16 | 20 | 23 | 22 | 21 | 20 | 19 | 19 | 18 | 20 | 22 | 19 | 19 | 18 | 17 | 17 | 16 | 17 | 17 | 18 | 18 | 17 |
| Feels °C (?) | 14 | 13 | 12 | 18 | 22 | 22 | 19 | 18 | 18 | 15 | 15 | 14 | 14 | 13 | 12 | 10 | 10 | 9 | 9 | 11 | 11 | 13 | 13 | 14 |
- 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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