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 Thursday 11 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
24.1° C
(Which is normal for this time of year)How big are the waves at Prainha today?
The current surf forecast for Prainha at 1AM is: 2.2m 12s primary swell from a South-southeast direction and 0.9m 10s secondary swell from a East-northeast direction (forecast issued at 08:00pm December 11). The wind direction is predicted to be glassy and the swell rating is 4.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 6ft (1.8m) | 11s |
| Afternoon (12 Dec) | 5ft (1.6m) | 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
Thu 11 | Friday 12 | Saturday 13 | Sunday 14 | |||||||||||||||||||||
| 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) (?) | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 7 | 7 | 7 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1493 | 1468 | 1420 | 1131 | 933 | 731 | 631 | 530 | 451 | 388 | 331 | 286 | 281 | 240 | 240 | 240 | 204 | 204 | 171 | 168 | 176 | 158 | 162 | 125 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | glass | glass | glass | cross | cross- on | cross- on | cross- on | glass | cross | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | glass | glass | glass | glass | on | on |
High Tide / height (m) | 6:02PM 0.69 | 8:12AM 0.60 | 11:43AM 0.58 | 7:31PM 0.65 | 9:33AM 0.62 | 9:29PM 0.66 | 10:30AM 0.65 | |||||||||||||||||
Low Tide / height (m) | 2:34AM 0.32 | 11:04AM 0.58 | 3:26PM 0.53 | 3:42AM 0.35 | 4:18PM 0.45 | 4:42AM 0.36 | ||||||||||||||||||
Thu 11 | Friday 12 | Saturday 13 | Sunday 14 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:13 | - | - | - |
| Sunset | 7:01 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:02 | - | - | - | - | - | - | - |
 |  | | | | |  | | |  | | | | | |  | | |  | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 22 | 21 | 20 | 19 | 24 | 26 | 25 | 24 | 23 | 22 | 21 | 21 | 22 | 22 | 23 | 23 | 22 | 22 | 21 | 22 | 23 | 26 | 27 |
| Feels °C (?) | 25 | 24 | 23 | 21 | 19 | 24 | 25 | 26 | 27 | 25 | 23 | 22 | 22 | 24 | 24 | 24 | 24 | 25 | 25 | 24 | 25 | 27 | 28 | 29 |
- 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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