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 Sunday 14 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
14.5° C
(Which is 4.5°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 4AM is: 3.0m 12s primary swell from a Southwest direction and 0.1m 16s secondary swell from a West direction (forecast issued at 01:00am December 14). The wind direction is predicted to be cross-shore and the swell rating is 11.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | 8ft (2.5m) | 12s |
| Afternoon (14 Dec) | 7.5ft (2.3m) | 12s |
| Evening (14 Dec) | 7.5ft (2.3m) | 11s |
Table - waves today at Derde Steen. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 14 | Monday 15 | Tuesday 16 | ||||||||||||||||||||||
| 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) (?) | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3069 | 2530 | 2281 | 1913 | 1685 | 1474 | 1305 | 1365 | 1427 | 1401 | 1478 | 1745 | 1902 | 1799 | 2039 | 1934 | 1866 | 1771 | 1710 | 1599 | 1496 | 1510 | 1064 | 2824 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross- off | cross | cross- on | cross- on | cross- on | cross | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross | cross | cross | glass | cross | cross- on | cross- on | cross- on | cross |
High Tide / height (m) | 11:18PM 1.04 | 11:27AM 1.21 | 12:16AM 1.09 | 12:17PM 1.23 | 1:01AM 1.15 | 1:01PM 1.27 | ||||||||||||||||||
Low Tide / height (m) | 5:13AM 0.56 | 6:09PM 0.42 | 6:12AM 0.53 | 6:53PM 0.37 | 7:00AM 0.48 | 7:31PM 0.31 | ||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:30 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:51 | - | - | - | - | - | - | - | 7:52 | - | - | - | - | - | - | - | 7:52 | - |
 | | |  | | | | | | | | | | | | | | | | |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 16 | 16 | 15 | 16 | 19 | 19 | 20 | 18 | 18 | 17 | 16 | 18 | 21 | 21 | 22 | 20 | 19 | 18 | 17 | 19 | 20 | 20 | 19 | 18 |
| Feels °C (?) | 14 | 14 | 13 | 14 | 16 | 15 | 16 | 15 | 17 | 16 | 15 | 17 | 19 | 18 | 19 | 18 | 18 | 18 | 18 | 19 | 19 | 17 | 17 | 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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