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 Friday 12 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
25.5° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Itamambuca today?
The current surf forecast for Itamambuca at 8AM is: 1.6m 13s primary swell from a South direction and 0.3m 9s secondary swell from a East direction, 0.5m 9s secondary swell from a East direction (forecast issued at 02:00am December 12). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 5ft (1.5m) | 13s |
| Afternoon (12 Dec) | 4.5ft (1.4m) | 12s |
| Evening (12 Dec) | 4ft (1.2m) | 11s |
Table - waves today at Itamambuca. (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 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 852 | 852 | 826 | 704 | 660 | 556 | 456 | 350 | 284 | 274 | 214 | 202 | 164 | 167 | 170 | 170 | 136 | 146 | 106 | 78 | 78 | 77 | 75 | 71 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | off | glass | cross- on | glass | glass | glass | glass | cross- off | glass | glass | cross | glass | cross | cross | cross- off | cross- off | glass | glass | glass | cross | glass | cross- off |
High Tide / height (m) | 8:00AM 0.72 | 7:31PM 0.80 | 10:44AM 0.74 | 10:19PM 0.78 | 11:23AM 0.77 | |||||||||||||||||||
Low Tide / height (m) | 2:28AM 0.35 | 2:56PM 0.55 | 3:34AM 0.39 | 4:03PM 0.48 | 4:38AM 0.41 | 5:03PM 0.40 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| Sunrise | - | - | 5:05 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:39 | - | - | - | - | - | - | - | 6:39 | - | - | - | - | - | - | - | 6:40 | - |
 | |  |  | |  | |  |  |  |  | |  | | |  | | | | |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | 1 | 1 | 2 | 6 | - | 2 | 10 | - | - | - | - | 1 | - | - | - |
| Temp. °C | 25 | 25 | 25 | 29 | 29 | 27 | 26 | 25 | 25 | 23 | 23 | 24 | 24 | 26 | 24 | 23 | 24 | 23 | 24 | 24 | 26 | 26 | 26 | 26 |
| Feels °C (?) | 26 | 26 | 26 | 30 | 30 | 30 | 29 | 28 | 27 | 25 | 26 | 28 | 26 | 30 | 28 | 25 | 28 | 26 | 27 | 28 | 30 | 29 | 30 | 30 |
- 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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