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 2 am Saturday 13 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
26.1° C
(Which is 1.5°C warmer than normal for this time of year)How big are the waves at Jaconé today?
The current surf forecast for Jaconé at 7AM is: 1.5m 11s primary swell from a South-southwest direction and 0.3m 8s secondary swell from a East direction (forecast issued at 02:00am December 13). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 4.5ft (1.4m) | 10s |
| Afternoon (13 Dec) | 4.5ft (1.3m) | 10s |
| Evening (13 Dec) | 3.5ft (1.1m) | 10s |
Table - waves today at Jaconé. (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 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 799 | 655 | 505 | 411 | 370 | 314 | 300 | 240 | 240 | 200 | 158 | 158 | 156 | 123 | 123 | 125 | 94 | 92 | 65 | 65 | 70 | 71 | 71 | 221 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | glass | cross- on | on | on | off | off | cross- off | cross- off | glass | cross | glass | cross- on | off | off | glass | cross- off | off | glass | cross | cross- off | glass | cross- off |
High Tide / height (m) | 10:37AM 0.77 | 10:40PM 0.80 | 11:18AM 0.80 | 11:45PM 0.85 | 11:54AM 0.82 | |||||||||||||||||||
Low Tide / height (m) | 3:23AM 0.32 | 3:52PM 0.41 | 4:24AM 0.34 | 4:49PM 0.32 | 5:20AM 0.33 | 5:38PM 0.24 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| Sunrise | - | - | 4:58 | - | - | - | - | - | - | - | 4:58 | - | - | - | - | - | - | - | 4:58 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:30 | - |
 | |  |  | |  | |  | | | | | | |  |  | |  | | | |  | |  | |
Rain (mm) | - | - | - | 1 | 2 | - | 5 | 4 | 4 | 2 | - | - | - | - | 1 | - | - | - | - | - | - | 1 | 2 | 1 |
| Temp. °C | 24 | 24 | 25 | 24 | 25 | 25 | 24 | 23 | 22 | 23 | 24 | 25 | 26 | 26 | 25 | 24 | 24 | 24 | 24 | 26 | 28 | 27 | 26 | 26 |
| Feels °C (?) | 27 | 27 | 29 | 25 | 27 | 28 | 28 | 26 | 23 | 24 | 28 | 29 | 30 | 27 | 29 | 27 | 28 | 27 | 27 | 30 | 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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