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 Tuesday 16 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
25.0° C
(Which is normal for this time of year)How big are the waves at Itamambuca today?
The current surf forecast for Itamambuca at 7AM is: 0.5m 9s primary swell from a South-southeast direction and 0.4m 8s secondary swell from a East direction (forecast issued at 02:00am December 16). The wind direction is predicted to be glassy.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 1.5ft (0.5m) | 9s |
| Afternoon (16 Dec) | 1.5ft (0.5m) | 10s |
| Evening (16 Dec) | 1.5ft (0.5m) | 8s |
Table - waves today at Itamambuca. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| 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) (?) | 10 | 10 | 9 | 9 | 9 | 10 | 10 | 8 | 10 | 5 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 8 | 8 | 9 | 9 | 11 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 55 | 51 | 50 | 50 | 50 | 52 | 37 | 35 | 30 | 65 | 240 | 203 | 183 | 193 | 140 | 130 | 142 | 119 | 109 | 92 | 96 | 74 | 144 | 123 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | off | glass | on | glass | glass | cross- off | cross- on | cross- on | cross- on | glass | glass | cross- on | cross- on | glass | glass | glass | glass | glass | on | cross- on | cross- on | cross- on |
High Tide / height (m) | 12:30PM 0.84 | 1:21AM 0.97 | 1:00PM 0.87 | 1:55AM 1.02 | 1:28PM 0.90 | |||||||||||||||||||
Low Tide / height (m) | 6:31AM 0.38 | 6:39PM 0.22 | 7:16AM 0.36 | 7:19PM 0.15 | 7:57AM 0.34 | 7:57PM 0.09 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| Sunrise | - | - | 5:07 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:42 | - | - | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:43 | - |
 |  |  |  | |  | |  | |  |  |  | | | |  | | | | | | |  | | |
Rain (mm) | - | - | - | - | - | 1 | 3 | 6 | 10 | 12 | 14 | 1 | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 25 | 25 | 29 | 31 | 27 | 27 | 25 | 24 | 23 | 21 | 21 | 21 | 22 | 22 | 22 | 21 | 20 | 21 | 22 | 23 | 23 | 22 | 22 |
| Feels °C (?) | 29 | 29 | 29 | 33 | 34 | 32 | 32 | 30 | 27 | 24 | 19 | 23 | 23 | 23 | 23 | 24 | 23 | 22 | 23 | 24 | 24 | 24 | 23 | 24 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Vancouver Island’s Day Of Days With Reed Platenius
Surf-Forecast recently helped the 21-year-old Canadian pro surfer and adventurer score some cold water perfection at home.
Read more
Discover more articles and updates in the Greenroom.
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Itamambuca surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest