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:
Praia das Dunas surfForecast / Rio de Janeiro / Brazil
48hr Weather and Surf, issued 2 am Friday 12 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Praia das Dunas surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Praia das Dunas sea temperature is
25.6° C
(Which is slightly warmer than usual)How big are the waves at Praia das Dunas today?
The current surf forecast for Praia das Dunas at 8AM is: 0.7m 8s primary swell from a East-northeast direction (forecast issued at 02:00am December 12). An open ocean swell of 2.5m 13s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 2.5ft (0.7m) | 8s |
| Afternoon (12 Dec) | 2.5ft (0.7m) | 8s |
| Evening (12 Dec) | 1ft (0.3m) | 12s |
Table - waves today at Praia das Dunas. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| 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) (?) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 12 | 7 | 7 | 4 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 10 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 82 | 80 | 76 | 58 | 73 | 63 | 34 | 30 | 73 | 76 | 34 | 175 | 94 | 99 | 99 | 81 | 210 | 120 | 335 | 159 | 163 | 135 | 121 | 297 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | cross- on | cross- on | cross- on | on | on | on | on | cross- off | off | off | on | cross- on | glass | on | on | cross- on | glass | glass | glass | on |
High Tide / height (m) | 9:25AM 0.75 | 8:38PM 0.78 | 10:23AM 0.77 | 10:28PM 0.80 | 11:08AM 0.80 | |||||||||||||||||||
Low Tide / height (m) | 2:25AM 0.32 | 2:56PM 0.51 | 3:33AM 0.36 | 4:05PM 0.45 | 4:39AM 0.38 | 5:04PM 0.37 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| Sunrise | - | - | 4:56 | - | - | - | - | - | - | - | 4:56 | - | - | - | - | - | - | - | 4:56 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:27 | - | - | - | - | - | - | - | 6:27 | - | - | - | - | - | - | - | 6:28 | - |
 | |  | | | | | |  | |  |  |  | | |  | |  |  | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | 3 | 3 | - | 2 | 5 | 15 | 1 | - | - | 2 | 3 | 4 |
| Temp. °C | 24 | 23 | 24 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 26 | 24 | 23 | 24 | 23 | 23 | 22 | 23 | 24 | 24 | 24 | 24 | 23 |
| Feels °C (?) | 26 | 24 | 25 | 25 | 24 | 25 | 26 | 27 | 25 | 25 | 26 | 29 | 23 | 25 | 28 | 25 | 27 | 22 | 23 | 25 | 28 | 28 | 29 | 26 |
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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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