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:
Barra do Una surfForecast / São Paulo / Brazil
48hr Weather and Surf, issued 2 pm Wednesday 10 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Barra do Una surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Barra do Una sea temperature is
25.3° C
(Which is slightly warmer than usual)How big are the waves at Barra do Una today?
The current surf forecast for Barra do Una at 10PM is: 0.7m 9s primary swell from a East-southeast direction and 0.3m 12s secondary swell from a South-southeast direction (forecast issued at 02:00pm December 10). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Dec) | - | - |
| Afternoon (10 Dec) | 2.5ft (0.8m) | 9s |
| Evening (10 Dec) | 2.5ft (0.7m) | 9s |
Table - waves today at Barra do Una. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | |||||||||||||||||||||
| 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) (?) | 8 | 9 | 9 | 9 | 9 | 10 | 9 | 9 | 12 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 77 | 106 | 80 | 80 | 69 | 65 | 44 | 43 | 78 | 330 | 475 | 539 | 556 | 545 | 519 | 503 | 472 | 377 | 364 | 302 | 242 | 194 | 187 | 144 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross | cross | cross | cross | cross | cross | on | cross- on | cross- off | off | off | off | cross | glass | cross- on | cross- off | cross- off | off | off | off | off | glass |
High Tide / height (m) | 5:49PM 1.05 | 7:11AM 0.91 | 6:50PM 0.99 | 8:13AM 0.88 | 8:08PM 0.95 | |||||||||||||||||||
Low Tide / height (m) | 10:17AM 0.70 | 11:57PM 0.42 | 11:00AM 0.72 | 2:49AM 0.49 | 3:37PM 0.70 | 4:09AM 0.51 | ||||||||||||||||||
Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:13 | - |
| Sunset | - | - | 6:49 | - | - | - | - | - | - | - | 6:49 | - | - | - | - | - | - | - | 6:50 | - | - | - | - | - |
 | | |  | | | | | | | | | | |  | | |  |  |  | | |  |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 9 | 1 | 1 | 5 | 1 | - |
| Temp. °C | 32 | 32 | 31 | 28 | 26 | 25 | 24 | 27 | 29 | 29 | 26 | 23 | 23 | 23 | 23 | 26 | 29 | 25 | 22 | 23 | 22 | 22 | 22 | 23 |
| Feels °C (?) | 32 | 29 | 30 | 27 | 26 | 25 | 24 | 27 | 28 | 30 | 27 | 23 | 24 | 24 | 25 | 28 | 30 | 27 | 25 | 26 | 24 | 25 | 25 | 26 |
- 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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