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 2 pm Friday 12 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
24.4° C
(Which is normal for this time of year)How big are the waves at Prainha today?
The current surf forecast for Prainha at 8PM is: 1.4m 10s primary swell from a South-southeast direction and 0.7m 9s secondary swell from a East-northeast direction, 0.4m 3s secondary swell from a North-northeast direction (forecast issued at 02:00pm December 12). The wind direction is predicted to be cross-shore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | - | - |
| Afternoon (12 Dec) | 5ft (1.5m) | 10s |
| Evening (12 Dec) | 4.5ft (1.4m) | 10s |
Table - waves today at Prainha. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 7 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 631 | 469 | 377 | 388 | 331 | 331 | 281 | 281 | 240 | 240 | 204 | 204 | 200 | 164 | 142 | 149 | 154 | 132 | 139 | 172 | 143 | 155 | 86 | 80 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | glass | glass | cross- on | glass | on | glass | cross- on | cross- on | cross- on | glass | glass | glass | glass | glass | cross- on | on | on | glass | glass | glass | glass | cross- on |
High Tide / height (m) | 11:43AM 0.58 | 7:31PM 0.65 | 9:33AM 0.62 | 9:29PM 0.66 | 10:30AM 0.65 | 11:00PM 0.71 | ||||||||||||||||||
Low Tide / height (m) | 11:04AM 0.58 | 3:26PM 0.53 | 3:42AM 0.35 | 4:18PM 0.45 | 4:42AM 0.36 | 5:03PM 0.36 | 5:35AM 0.36 | |||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:13 | - | - | - | - | - | - | - | 5:13 | - |
| Sunset | - | - | 7:01 | - | - | - | - | - | - | - | 7:02 | - | - | - | - | - | - | - | 7:04 | - | - | - | - | - |
 | | |  |  | |  |  |  | |  |  | | | | | | | |  | | | | | |
Rain (mm) | - | - | - | - | 1 | - | - | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 26 | 26 | 24 | 22 | 21 | 21 | 21 | 23 | 24 | 24 | 24 | 23 | 23 | 22 | 22 | 24 | 26 | 26 | 25 | 23 | 23 | 22 | 22 | 26 |
| Feels °C (?) | 25 | 27 | 26 | 24 | 23 | 23 | 23 | 26 | 27 | 26 | 27 | 27 | 27 | 26 | 25 | 28 | 28 | 28 | 28 | 27 | 27 | 26 | 25 | 28 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Vancouver Island’s Day Of Days With Reed Platenius
Surf-Forecast recently helped the 21-year-old Canadian pro surfer and adventurer score some cold water perfection at home.
Read more
Discover more articles and updates in the Greenroom.
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Prainha surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest