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 am Saturday 13 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 8AM is: 1.2m 10s primary swell from a South-southeast direction and 0.7m 8s secondary swell from a East-northeast direction, 0.4m 4s secondary swell from a Northeast direction (forecast issued at 02:00am December 13). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 4ft (1.2m) | 10s |
| Afternoon (13 Dec) | 3.5ft (1.1m) | 10s |
| Evening (13 Dec) | 3.5ft (1.0m) | 10s |
Table - waves today at Prainha. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| 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 | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 7 | 7 | 8 | 7 | 8 | 10 | 10 | 8 | 10 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 331 | 331 | 286 | 281 | 281 | 240 | 240 | 200 | 200 | 164 | 142 | 139 | 113 | 110 | 111 | 90 | 58 | 58 | 55 | 102 | 79 | 119 | 61 | 142 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- on | glass | glass | cross- on | cross- on | cross | cross- off | cross- off | off | off | glass | cross- on | cross- on | on | glass | glass | glass | glass | cross- on | on | on | cross- off | cross |
High Tide / height (m) | 9:33AM 0.62 | 9:29PM 0.66 | 10:30AM 0.65 | 11:00PM 0.71 | 11:13AM 0.68 | |||||||||||||||||||
Low Tide / height (m) | 3:42AM 0.35 | 4:18PM 0.45 | 4:42AM 0.36 | 5:03PM 0.36 | 5:35AM 0.36 | 5:41PM 0.28 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| Sunrise | - | - | 5:11 | - | - | - | - | - | - | - | 5:13 | - | - | - | - | - | - | - | 5:13 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:02 | - | - | - | - | - | - | - | 7:04 | - | - | - | - | - | - | - | 7:04 | - |
 | |  |  | | | |  | | | | | | | | | | | | | | |  |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 13 | 4 |
| Temp. °C | 22 | 21 | 21 | 24 | 26 | 26 | 25 | 22 | 21 | 21 | 21 | 24 | 26 | 26 | 25 | 23 | 22 | 22 | 22 | 26 | 28 | 28 | 22 | 21 |
| Feels °C (?) | 24 | 22 | 23 | 26 | 27 | 27 | 27 | 25 | 23 | 23 | 24 | 27 | 27 | 28 | 28 | 27 | 25 | 25 | 25 | 28 | 29 | 30 | 24 | 22 |
- 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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