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 7 am Friday 12 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
16.8° C
(Which is 2.5°C colder than average for this time of year)How big are the waves at Gansbaai today?
The current surf forecast for Gansbaai at 9AM is: 1.3m 17s primary swell from a Southwest direction and 0.6m 9s secondary swell from a Southwest direction, 1.9m 6s secondary swell from a West-northwest direction (forecast issued at 07:00am December 12). The wind direction is predicted to be cross-onshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 4.5ft (1.3m) | 17s |
| Afternoon (12 Dec) | 11ft (3.5m) | 9s |
| Evening (12 Dec) | 11ft (3.5m) | 11s |
Table - waves today at Gansbaai. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| 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) (?) | 18 | 18 | 17 | 9 | 10 | 10 | 12 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 491 | 781 | 1145 | 1562 | 2716 | 2651 | 3529 | 7221 | 6848 | 5955 | 4862 | 4183 | 3935 | 3627 | 3191 | 2735 | 2281 | 2027 | 1775 | 1557 | 1438 | 1562 | 1627 | 1813 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | on | on | cross- on | on | glass | cross | cross | cross- on | cross- on | cross- on | glass | cross- off | cross- off |
High Tide / height (m) | 9:21AM 1.25 | 10:03PM 1.03 | 10:29AM 1.23 | 11:18PM 1.06 | 11:29AM 1.24 | 12:16AM 1.11 | ||||||||||||||||||
Low Tide / height (m) | 4:06PM 0.53 | 3:59AM 0.58 | 5:16PM 0.51 | 5:11AM 0.58 | 6:12PM 0.46 | |||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | - | 5:22 | - | - | - | - | - | - | - | 5:22 | - | - | - | - | - | - | - | 5:22 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:49 | - | - | - | - | - | - | - | 7:49 | - | - | - | - | - | - | - | 7:50 | - | - | - |
 |  | |  | |  |  | | |  | |  | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | 4 | 2 | 1 | 2 | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 19 | 21 | 23 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 17 | 18 | 18 | 17 | 17 | 17 | 15 | 16 | 17 | 18 | 18 | 18 | 18 | 18 |
| Feels °C (?) | 15 | 15 | 15 | 12 | 12 | 9 | 10 | 9 | 10 | 10 | 11 | 13 | 13 | 13 | 15 | 16 | 14 | 14 | 15 | 16 | 16 | 18 | 18 | 18 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Vancouver Island’s Day Of Days With Reed Platenius
Surf-Forecast recently helped the 21-year-old Canadian pro surfer and adventurer score some cold water perfection at home.
Read more
Discover more articles and updates in the Greenroom.
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Gansbaai surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest