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 / São Paulo / Brazil
48hr Weather and Surf, issued 2 am Friday 12 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
25.1° C
(Which is slightly warmer than usual)How big are the waves at Itaipu today?
The current surf forecast for Itaipu at 7AM is: 1.4m 12s primary swell from a South direction and 0.2m 7s secondary swell from a East direction (forecast issued at 02:00am December 12). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 4.5ft (1.4m) | 12s |
| Afternoon (12 Dec) | 4ft (1.2m) | 12s |
| Evening (12 Dec) | 3.5ft (1.0m) | 11s |
Table - waves today at Itaipu. (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) (?) | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 633 | 613 | 603 | 584 | 488 | 397 | 300 | 240 | 231 | 177 | 167 | 130 | 133 | 139 | 106 | 104 | 80 | 80 | 78 | 56 | 55 | 26 | 27 | 27 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | cross- off | cross- on | on | glass | cross- off | cross- off | cross- off | cross- on | cross- off | cross | cross- on | cross- on | cross- off | cross- off | glass | off | off | off | glass | off | cross- off | off |
High Tide / height (m) | 8:01AM 0.79 | 7:47PM 0.86 | 9:44AM 0.79 | 9:53PM 0.85 | 11:10AM 0.83 | |||||||||||||||||||
Low Tide / height (m) | 2:40AM 0.41 | 3:14PM 0.62 | 3:51AM 0.44 | 4:21PM 0.54 | 4:55AM 0.45 | 5:17PM 0.44 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| Sunrise | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:46 | - | - | - | - | - | - | - | 6:46 | - | - | - | - | - | - | - | 6:47 | - |
 | |  | |  |  | |  | | | |  |  | | |  | |  | | | |  | | | |
Rain (mm) | - | - | - | - | - | 1 | 2 | 1 | 4 | 3 | 2 | - | 1 | 3 | 5 | - | - | - | 2 | - | - | 1 | - | - |
| Temp. °C | 25 | 25 | 24 | 28 | 29 | 25 | 24 | 24 | 23 | 22 | 22 | 24 | 26 | 23 | 23 | 24 | 23 | 23 | 23 | 25 | 28 | 28 | 28 | 26 |
| Feels °C (?) | 25 | 25 | 24 | 29 | 29 | 28 | 26 | 26 | 25 | 24 | 25 | 26 | 29 | 26 | 26 | 27 | 26 | 25 | 25 | 28 | 31 | 30 | 31 | 29 |
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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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