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:
Prainha surfForecast / Santa Catarina – Norte / Brazil
48hr Weather and Surf, issued 8 am Monday 15 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Prainha surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Prainha sea temperature is
24.2° C
(Which is normal for this time of year)How big are the waves at Prainha today?
The current surf forecast for Prainha at 12PM is: 0.7m 10s primary swell from a Southeast direction and 0.7m 7s secondary swell from a East-southeast direction, 0.3m 2s secondary swell from a Northeast direction (forecast issued at 08:00am December 15). The wind direction is predicted to be onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 2ft (0.6m) | 8s |
| Afternoon (15 Dec) | 3ft (0.9m) | 8s |
| Evening (15 Dec) | 2ft (0.6m) | 9s |
Table - waves today at Prainha. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 10 | 8 | 10 | 9 | 9 | 8 | 7 | 10 | 6 | 7 | 8 | 8 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 52 | 37 | 100 | 96 | 73 | 58 | 58 | 82 | 96 | 196 | 453 | 984 | 1132 | 794 | 595 | 416 | 336 | 291 | 277 | 382 | 256 | 222 | 148 | 123 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- on | on | on | cross- on | glass | glass | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | cross- off | cross- on | cross- on | cross- on | cross- on | on | on |
High Tide / height (m) | 11:13AM 0.68 | 11:57PM 0.77 | 11:51AM 0.71 | 12:41AM 0.83 | 12:26PM 0.73 | 1:20AM 0.88 | ||||||||||||||||||
Low Tide / height (m) | 5:35AM 0.36 | 5:41PM 0.28 | 6:23AM 0.35 | 6:16PM 0.21 | 7:05AM 0.35 | 6:49PM 0.16 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| Sunrise | 5:13 | - | - | - | - | - | - | - | 5:13 | - | - | - | - | - | - | - | 5:13 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:04 | - | - | - | - | - | - | - | 7:05 | - | - | - | - | - | - | - | 7:06 | - | - | - |
 | | | | |  |  |  | |  |  | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 21 | 26 | 28 | 28 | 26 | 25 | 24 | 24 | 24 | 25 | 25 | 25 | 23 | 22 | 21 | 18 | 18 | 21 | 23 | 23 | 22 | 21 | 21 | 21 |
| Feels °C (?) | 24 | 28 | 28 | 30 | 30 | 30 | 29 | 28 | 28 | 25 | 23 | 20 | 19 | 19 | 20 | 17 | 18 | 20 | 20 | 21 | 21 | 21 | 21 | 21 |
- 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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