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:
Big Bay surfForecast / Cape Town / South Africa
48hr Weather and Surf, issued 1 am Wednesday 17 Dec 2025 SASTForecast update in hr min s Forecast update imminent
Big Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Big Bay sea temperature is
15.3° C
(Which is 3.7°C colder than average for this time of year)How big are the waves at Big Bay today?
The current surf forecast for Big Bay at 7AM is: 2.5m 13s primary swell from a West-southwest direction and 0.2m 15s secondary swell from a West-northwest direction, 1.3m 9s secondary swell from a South-southwest direction (forecast issued at 01:00am December 17). The wind direction is predicted to be cross-offshore.
| Time (SAST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 8ft (2.5m) | 13s |
| Afternoon (17 Dec) | 7ft (2.1m) | 12s |
| Evening (17 Dec) | 5ft (1.6m) | 12s |
Table - waves today at Big Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| 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) (?) | 14 | 14 | 14 | 13 | 10 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 8 | 8 | 8 | 8 | 9 | 8 | 10 | 10 | 10 | 13 | 13 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2483 | 3017 | 2889 | 2117 | 1834 | 1402 | 1068 | 754 | 629 | 439 | 367 | 303 | 257 | 336 | 475 | 588 | 645 | 494 | 231 | 213 | 208 | 173 | 202 | 212 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross- off | cross- off | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 1:40AM 1.22 | 1:41PM 1.31 | 2:15AM 1.27 | 2:18PM 1.35 | 2:49AM 1.32 | 2:53PM 1.37 | ||||||||||||||||||
Low Tide / height (m) | 7:41AM 0.43 | 8:06PM 0.26 | 8:18AM 0.38 | 8:40PM 0.22 | 8:53AM 0.34 | |||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:30 | - | - | - | - | - | - | - | 5:30 | - | - | - | - | - | - | - | 5:30 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:52 | - | - | - | - | - | - | - | 7:53 | - | - | - | - | - | - | - | 7:54 | - |
 |  | |  | | | | | | | | | | | | | | | | | | | | | |
Rain (mm) | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 19 | 18 | 17 | 18 | 19 | 19 | 18 | 17 | 16 | 16 | 15 | 17 | 20 | 21 | 20 | 17 | 17 | 17 | 16 | 18 | 21 | 22 | 21 | 19 |
| Feels °C (?) | 18 | 15 | 15 | 14 | 14 | 13 | 12 | 12 | 11 | 13 | 12 | 13 | 16 | 17 | 15 | 12 | 14 | 15 | 14 | 15 | 17 | 18 | 16 | 14 |
- 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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