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 pm Wednesday 10 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
24.0° C
(Which is normal for this time of year)How big are the waves at Prainha today?
The current surf forecast for Prainha at 11PM is: 1.4m 10s primary swell from a East-northeast direction and 0.5m 10s secondary swell from a South direction (forecast issued at 08:00pm December 10). An open ocean swell of 0.9m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Dec) | - | - |
| Afternoon (10 Dec) | - | - |
| Evening (10 Dec) | 5ft (1.5m) | 10s |
Table - waves today at Prainha. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wed 10 | Thursday 11 | Friday 12 | Saturday 13 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 10 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 506 | 473 | 373 | 354 | 909 | 1175 | 1338 | 1543 | 1687 | 1468 | 1302 | 1083 | 843 | 731 | 655 | 572 | 505 | 427 | 339 | 274 | 263 | 223 | 179 | 179 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | glass | cross | cross | cross- off | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | cross- on | glass |
High Tide / height (m) | 4:59PM 0.73 | 7:00AM 0.61 | 12:27PM 0.61 | 6:02PM 0.69 | 8:12AM 0.60 | 11:43AM 0.58 | 7:31PM 0.65 | 9:33AM 0.62 | ||||||||||||||||
Low Tide / height (m) | 1:19AM 0.28 | 9:31AM 0.57 | 2:27PM 0.60 | 2:34AM 0.32 | 11:04AM 0.58 | 3:26PM 0.53 | 3:42AM 0.35 | |||||||||||||||||
Wed 10 | Thursday 11 | Friday 12 | Saturday 13 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - |
| Sunset | 7:00 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - |
 |  | | |  | | | | | | | | | |  | | |  | |  |  |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 10 | 5 | 1 | 1 |
| Temp. °C | 25 | 23 | 23 | 21 | 21 | 24 | 29 | 27 | 24 | 22 | 20 | 19 | 19 | 24 | 27 | 25 | 24 | 23 | 22 | 21 | 21 | 21 | 22 | 23 |
| Feels °C (?) | 23 | 20 | 21 | 19 | 18 | 20 | 26 | 25 | 24 | 24 | 21 | 20 | 19 | 24 | 26 | 26 | 26 | 25 | 22 | 22 | 23 | 22 | 25 | 27 |
- 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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