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:
Jaconé surfForecast / Rio de Janeiro / Brazil
48hr Weather and Surf, issued 8 am Friday 12 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Jaconé surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Jaconé sea temperature is
25.7° C
(Which is 1.1°C warmer than normal for this time of year)How big are the waves at Jaconé today?
The current surf forecast for Jaconé at 3PM is: 2.2m 12s primary swell from a South-southwest direction and 0.4m 13s secondary swell from a Southeast direction (forecast issued at 08:00am December 12). An open ocean swell of 0.6m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 8ft (2.4m) | 13s |
| Afternoon (12 Dec) | 7ft (2.2m) | 12s |
| Evening (12 Dec) | 6ft (1.8m) | 12s |
Table - waves today at Jaconé. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| 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 | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2154 | 1906 | 1815 | 1427 | 1200 | 923 | 718 | 608 | 505 | 411 | 370 | 314 | 300 | 250 | 240 | 200 | 194 | 192 | 192 | 123 | 121 | 94 | 94 | 209 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | glass | cross- on | cross- on | cross- on | cross- off | glass | off | off | glass | cross- on | on | cross- on | cross- off | off | off | off |
High Tide / height (m) | 9:46AM 0.75 | 8:38PM 0.77 | 10:37AM 0.77 | 10:40PM 0.80 | 11:18AM 0.80 | 11:45PM 0.85 | ||||||||||||||||||
Low Tide / height (m) | 2:46PM 0.47 | 3:23AM 0.32 | 3:52PM 0.41 | 4:24AM 0.34 | 4:49PM 0.32 | |||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | 4:58 | - | - | - | - | - | - | - | 4:58 | - | - | - | - | - | - | - | 4:58 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:29 | - | - | - | - | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:30 | - | - | - |
 | | | | |  | | |  |  | |  | |  | | | | | | |  |  |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | 1 | - | - | 2 | 1 | 5 | - | - | - | - | - | 1 | 2 | - | - |
| Temp. °C | 23 | 28 | 29 | 28 | 26 | 25 | 24 | 24 | 25 | 25 | 29 | 26 | 24 | 24 | 23 | 23 | 24 | 25 | 27 | 25 | 24 | 24 | 24 | 24 |
| Feels °C (?) | 24 | 29 | 28 | 27 | 27 | 27 | 27 | 27 | 29 | 24 | 31 | 27 | 28 | 28 | 25 | 25 | 28 | 28 | 30 | 27 | 28 | 27 | 27 | 28 |
- 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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