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:
Double Mouth surfForecast / Eastern Cape – Wild Coast / South Africa
48hr Weather and Surf, issued 1 am Saturday 13 Dec 2025 SASTForecast update in hr min s Forecast update imminent
Double Mouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Double Mouth sea temperature is
19.9° C
(Which is 2.8°C colder than average for this time of year)How big are the waves at Double Mouth today?
The current surf forecast for Double Mouth at 7AM is: 1.4m 5s primary swell from a Southwest direction and 0.4m 16s secondary swell from a Southwest direction (forecast issued at 01:00am December 13). An open ocean swell of 1.1m 9s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 5.5ft (1.7m) | 6s |
| Afternoon (13 Dec) | 8ft (2.4m) | 8s |
| Evening (13 Dec) | 7ft (2.1m) | 14s |
Table - waves today at Double Mouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| 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) (?) | 10 | 10 | 17 | 6 | 7 | 8 | 14 | 14 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 14 | 14 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 111 | 48 | 77 | 141 | 332 | 663 | 2118 | 1772 | 1081 | 713 | 775 | 615 | 491 | 408 | 346 | 346 | 286 | 273 | 268 | 413 | 586 | 680 | 659 | 555 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross- off | cross | cross | cross | cross | cross | cross- off | cross- off | glass | cross | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross | cross- on | cross- on | cross | cross- on |
High Tide / height (m) | 10:00PM 1.01 | 10:55AM 1.19 | 11:30PM 1.01 | 12:03PM 1.22 | 12:40AM 1.07 | 12:56PM 1.26 | ||||||||||||||||||
Low Tide / height (m) | 4:00AM 0.56 | 5:30PM 0.60 | 5:21AM 0.57 | 6:36PM 0.53 | 6:29AM 0.54 | 7:24PM 0.45 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| Sunrise | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:07 | - | - | - | - | - | - | - | 7:08 | - | - | - | - | - | - | - | 7:09 | - |
 |  |  | |  |  | |  | | | | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 20 | 20 | 18 | 21 | 21 | 19 | 20 | 20 | 19 | 18 | 17 | 20 | 22 | 22 | 23 | 21 | 20 | 18 | 17 | 24 | 26 | 26 | 27 | 23 |
| Feels °C (?) | 20 | 18 | 14 | 16 | 15 | 14 | 15 | 16 | 16 | 16 | 16 | 19 | 19 | 18 | 20 | 19 | 20 | 18 | 16 | 24 | 26 | 26 | 28 | 26 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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