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 Monday 15 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
14.2° C
(Which is 4.8°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: 2.4m 11s primary swell from a Southwest direction and 0.1m 15s secondary swell from a Northwest direction (forecast issued at 01:00am December 15). The wind direction is predicted to be cross-shore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 8ft (2.5m) | 12s |
| Afternoon (15 Dec) | 8ft (2.5m) | 12s |
| Evening (15 Dec) | 8ft (2.5m) | 12s |
Table - waves today at Derde Steen. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| 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) (?) | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 15 | 14 | 14 | 13 | 13 | 13 | 9 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1340 | 1401 | 1452 | 1617 | 1769 | 1799 | 1966 | 1866 | 1897 | 1801 | 1682 | 1468 | 1472 | 1402 | 1138 | 2268 | 2222 | 2510 | 2394 | 2176 | 2071 | 1187 | 1019 | 766 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross | cross | cross | glass | glass | on | on | on | cross | cross | cross- on | cross | cross | cross- on | cross- on | cross | cross |
High Tide / height (m) | 12:16AM 1.09 | 12:17PM 1.23 | 1:01AM 1.15 | 1:01PM 1.27 | 1:40AM 1.22 | 1:41PM 1.31 | ||||||||||||||||||
Low Tide / height (m) | 6:12AM 0.53 | 6:53PM 0.37 | 7:00AM 0.48 | 7:31PM 0.31 | 7:41AM 0.43 | |||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:28 | - | - | - | - | - | - | - | 5:30 | - | - | - | - | - | - | - | 5:30 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:52 | - | - | - | - | - | - | - | 7:52 | - | - | - | - | - | - | - | 7:52 | - |
 | | |  | | | | | | | | |  | | |  |  | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 16 | 16 | 18 | 21 | 21 | 21 | 20 | 19 | 18 | 17 | 19 | 20 | 20 | 20 | 19 | 19 | 20 | 18 | 19 | 20 | 19 | 19 | 17 |
| Feels °C (?) | 15 | 15 | 15 | 17 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 20 | 18 | 18 | 18 | 20 | 19 | 21 | 15 | 15 | 16 | 13 | 13 | 11 |
- 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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