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:
Itamambuca surfForecast / São Paulo / Brazil
48hr Weather and Surf, issued 2 am Thursday 11 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Itamambuca surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Itamambuca sea temperature is
25.3° C
(Which is slightly warmer than usual)How big are the waves at Itamambuca today?
The current surf forecast for Itamambuca at 6AM is: 0.6m 10s primary swell from a East direction and 0.3m 11s secondary swell from a South-southeast direction (forecast issued at 02:00am December 11). The wind direction is predicted to be cross-offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Dec) | 2ft (0.6m) | 10s |
| Afternoon (11 Dec) | 1.5ft (0.4m) | 7s |
| Evening (11 Dec) | 5ft (1.5m) | 13s |
Table - waves today at Itamambuca. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 11 | Friday 12 | Saturday 13 | ||||||||||||||||||||||
| 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) (?) | 9 | 9 | 10 | 10 | 10 | 7 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 79 | 61 | 68 | 68 | 70 | 18 | 297 | 734 | 852 | 852 | 826 | 704 | 660 | 547 | 449 | 350 | 289 | 279 | 227 | 218 | 171 | 164 | 127 | 131 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | cross- off | cross- off | cross- off | cross- on | cross | cross- off | glass | glass | off | glass | cross- on | on | glass | cross- off | cross- off | glass | glass | cross- off | cross | glass | glass | cross |
High Tide / height (m) | 6:48AM 0.75 | 6:14PM 0.86 | 8:00AM 0.72 | 7:31PM 0.80 | 10:44AM 0.74 | |||||||||||||||||||
Low Tide / height (m) | 1:26AM 0.28 | 1:49PM 0.59 | 2:28AM 0.35 | 2:56PM 0.55 | 3:34AM 0.39 | 4:03PM 0.48 | ||||||||||||||||||
Thursday 11 | Friday 12 | Saturday 13 | ||||||||||||||||||||||
| Sunrise | - | - | 5:05 | - | - | - | - | - | - | - | 5:05 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:38 | - | - | - | - | - | - | - | 6:39 | - | - | - | - | - | - | - | 6:39 | - |
 | |  | | | | | | | |  | | |  |  |  | | |  | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 5 | 3 | 3 | 5 | 1 | 2 | 3 | - | 1 | 3 |
| Temp. °C | 28 | 28 | 27 | 30 | 32 | 30 | 26 | 25 | 24 | 24 | 24 | 28 | 29 | 28 | 23 | 23 | 23 | 22 | 24 | 24 | 25 | 25 | 25 | 23 |
| Feels °C (?) | 28 | 29 | 27 | 29 | 32 | 30 | 28 | 27 | 26 | 25 | 25 | 29 | 30 | 30 | 27 | 26 | 26 | 25 | 28 | 28 | 28 | 30 | 30 | 27 |
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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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