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:
Itaipu surfForecast / Rio de Janeiro / Brazil
48hr Weather and Surf, issued 2 pm Sunday 14 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Itaipu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Itaipu sea temperature is
25.9° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Itaipu today?
The current surf forecast for Itaipu at 8PM is: 0.8m 10s primary swell from a South direction (forecast issued at 02:00pm December 14). An open ocean swell of 0.3m 8s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | - | - |
| Afternoon (14 Dec) | 2.5ft (0.8m) | 10s |
| Evening (14 Dec) | 2.5ft (0.8m) | 10s |
Table - waves today at Itaipu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| 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) (?) | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 5 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 125 | 125 | 125 | 125 | 94 | 90 | 64 | 64 | 67 | 70 | 75 | 74 | 64 | 43 | 43 | 44 | 29 | 26 | 31 | 31 | 31 | 32 | 64 | 307 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross | off | cross- off | cross- off | cross- off | glass | cross- on | cross- off | cross- off | glass | cross- off | cross- off | cross- off | cross- off | cross | cross- off | glass | cross | cross | on | cross- on | on |
High Tide / height (m) | 10:57AM 0.92 | 11:21PM 0.97 | 11:25AM 0.94 | 12:07AM 1.00 | 11:36AM 0.95 | 12:47AM 1.01 | ||||||||||||||||||
Low Tide / height (m) | 4:16PM 0.06 | 4:41AM 0.07 | 5:02PM -0.03 | 5:26AM 0.07 | 5:46PM -0.09 | 6:10AM 0.08 | ||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:00 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - | - | - | 5:01 | - |
| Sunset | - | - | 6:31 | - | - | - | - | - | - | - | 6:32 | - | - | - | - | - | - | - | 6:32 | - | - | - | - | - |
 | | |  | |  |  |  | | | |  | | | | | |  | |  | |  |  |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | 2 | - | - | - | - | - | 1 | - | 2 | 3 | 6 | 13 | 7 |
| Temp. °C | 26 | 25 | 25 | 25 | 24 | 24 | 24 | 27 | 27 | 27 | 26 | 25 | 25 | 25 | 24 | 28 | 29 | 28 | 27 | 27 | 25 | 24 | 22 | 22 |
| Feels °C (?) | 29 | 28 | 28 | 28 | 27 | 27 | 27 | 30 | 27 | 28 | 29 | 29 | 29 | 28 | 27 | 31 | 31 | 30 | 32 | 29 | 27 | 26 | 19 | 19 |
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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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