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:
Derde Steen surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 1 am Friday 12 Dec 2025 SASTForecast update in hr min s Forecast update imminent
Derde Steen surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Derde Steen sea temperature is
13.6° C
(Which is 5.3°C colder than average for this time of year)How big are the waves at Derde Steen today?
The current surf forecast for Derde Steen at 6AM is: 0.9m 18s primary swell from a West-southwest direction and 0.6m 9s secondary swell from a Southwest direction, 0.5m 4s secondary swell from a West direction (forecast issued at 01:00am December 12). The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 4ft (1.2m) | 17s |
| Afternoon (12 Dec) | 5.5ft (1.7m) | 16s |
| Evening (12 Dec) | 6ft (1.9m) | 16s |
Table - waves today at Derde Steen. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| 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) (?) | 9 | 19 | 18 | 18 | 17 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 117 | 251 | 481 | 703 | 1165 | 1271 | 1611 | 1822 | 5759 | 6058 | 6140 | 5726 | 4657 | 3863 | 3684 | 3457 | 2917 | 2489 | 2281 | 1913 | 1685 | 1557 | 1305 | 1287 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- off | cross | cross- on | cross- on | cross- on | on | on | on | cross- on | cross- on | on | on | on | cross- on | cross | cross | cross- off | cross | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 8:48PM 1.05 | 9:22AM 1.22 | 10:06PM 1.02 | 10:28AM 1.20 | 11:18PM 1.04 | 11:27AM 1.21 | ||||||||||||||||||
Low Tide / height (m) | 2:48AM 0.50 | 4:06PM 0.49 | 4:02AM 0.55 | 5:14PM 0.47 | 5:13AM 0.56 | 6:09PM 0.42 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:28 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:50 | - | - | - | - | - | - | - | 7:51 | - | - | - | - | - | - | - | 7:51 | - |
 | |  |  |  |  | |  |  | | |  | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | 2 | 1 | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 17 | 17 | 19 | 20 | 17 | 18 | 17 | 16 | 17 | 17 | 17 | 17 | 18 | 17 | 17 | 16 | 16 | 15 | 16 | 19 | 20 | 20 | 19 |
| Feels °C (?) | 18 | 16 | 16 | 15 | 14 | 14 | 16 | 13 | 13 | 14 | 12 | 14 | 13 | 13 | 12 | 13 | 13 | 14 | 13 | 14 | 15 | 16 | 16 | 17 |
- 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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