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 Saturday 13 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
24.6° C
(Which is normal for this time of year)How big are the waves at Itaipu today?
The current surf forecast for Itaipu at 8AM is: 0.8m 10s primary swell from a South direction and 0.3m 4s secondary swell from a East direction (forecast issued at 02:00am December 13). The wind direction is predicted to be offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 2.5ft (0.8m) | 10s |
| Afternoon (13 Dec) | 2.5ft (0.7m) | 10s |
| Evening (13 Dec) | 2.5ft (0.7m) | 10s |
Table - waves today at Itaipu. (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) (?) | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 231 | 177 | 167 | 130 | 133 | 106 | 106 | 104 | 78 | 78 | 78 | 77 | 55 | 26 | 27 | 27 | 49 | 49 | 34 | 35 | 42 | 40 | 39 | 38 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross- off | off | off | off | cross- off | off | off | off | off | glass | on | on | cross | cross- off | glass | off | cross- off | glass | on | cross- on | cross | cross- off |
High Tide / height (m) | 9:44AM 0.79 | 9:53PM 0.85 | 11:10AM 0.83 | 11:43PM 0.91 | 11:54AM 0.88 | |||||||||||||||||||
Low Tide / height (m) | 3:51AM 0.44 | 4:21PM 0.54 | 4:55AM 0.45 | 5:17PM 0.44 | 5:51AM 0.43 | 6:04PM 0.34 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| Sunrise | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:46 | - | - | - | - | - | - | - | 6:47 | - | - | - | - | - | - | - | 6:47 | - |
 | |  | | |  | |  | |  | | | | | | | | | | |  | | |  | |
Rain (mm) | 5 | 3 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 1 | - |
| Temp. °C | 23 | 23 | 24 | 26 | 28 | 29 | 28 | 26 | 25 | 25 | 25 | 26 | 29 | 27 | 26 | 26 | 25 | 25 | 25 | 29 | 28 | 27 | 28 | 27 |
| Feels °C (?) | 25 | 25 | 27 | 28 | 30 | 32 | 30 | 29 | 27 | 27 | 27 | 29 | 31 | 29 | 29 | 28 | 28 | 27 | 27 | 33 | 31 | 30 | 31 | 31 |
- 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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