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 Tuesday 16 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
17.4° C
(Which is 2.0°C colder than average for this time of year)How big are the waves at Gansbaai today?
The current surf forecast for Gansbaai at 8AM is: 2.4m 12s primary swell from a Southwest direction and 0.1m 16s secondary swell from a West direction (forecast issued at 01:00am December 16). The wind direction is predicted to be offshore and the swell rating is 4.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 7.5ft (2.3m) | 12s |
| Afternoon (16 Dec) | 7ft (2.2m) | 12s |
| Evening (16 Dec) | 7ft (2.2m) | 12s |
Table - waves today at Gansbaai. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| 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) (?) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 14 | 10 | 9 | 10 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 10 | 10 | 11 | 10 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1978 | 1854 | 1682 | 1573 | 1472 | 1402 | 1236 | 1407 | 3242 | 1563 | 1441 | 1419 | 1599 | 1272 | 1103 | 1036 | 754 | 656 | 531 | 392 | 326 | 372 | 365 | 338 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- off | off | off | off | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross- off | off | off | cross- off | cross- off | cross- off |
High Tide / height (m) | 1:02AM 1.18 | 1:03PM 1.31 | 1:41AM 1.25 | 1:42PM 1.35 | 2:16AM 1.31 | 2:19PM 1.39 | ||||||||||||||||||
Low Tide / height (m) | 7:00AM 0.51 | 7:34PM 0.34 | 7:41AM 0.45 | 8:09PM 0.29 | 8:18AM 0.40 | |||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:24 | - | - | - | - | - | - | - | 5:24 | - | - | - | - | - | - | - | 5:24 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:51 | - | - | - | - | - | - | - | 7:52 | - | - | - | - | - | - | - | 7:52 | - |
 | | |  | | |  | |  | |  |  |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 20 | 20 | 19 | 18 | 18 | 19 | 19 | 20 | 20 | 20 | 20 | 18 | 17 | 18 | 18 | 18 | 18 | 17 | 17 | 16 | 16 | 17 | 19 | 20 |
| Feels °C (?) | 18 | 21 | 19 | 18 | 19 | 19 | 16 | 15 | 15 | 16 | 16 | 14 | 12 | 15 | 13 | 14 | 13 | 13 | 14 | 14 | 14 | 14 | 15 | 16 |
- 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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