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:
Canal surfForecast / Rio de Janeiro / Brazil
48hr Weather and Surf, issued 2 am Tuesday 16 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Canal surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Canal sea temperature is
27.1° C
(Which is 2.4°C warmer than normal for this time of year)How big are the waves at Canal today?
The current surf forecast for Canal at 8AM is: 0.6m 8s primary swell from a East direction and 0.5m 9s secondary swell from a South direction (forecast issued at 02:00am December 16). The wind direction is predicted to be cross-offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 2ft (0.6m) | 8s |
| Afternoon (16 Dec) | 2.5ft (0.8m) | 9s |
| Evening (16 Dec) | 2ft (0.6m) | 8s |
Table - waves today at Canal. (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 | 9 | 8 | 8 | 9 | 9 | 7 | 8 | 7 | 7 | 9 | 4 | 6 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 65 | 63 | 47 | 50 | 53 | 94 | 48 | 47 | 37 | 37 | 53 | 42 | 243 | 339 | 573 | 381 | 331 | 443 | 297 | 267 | 245 | 245 | 274 | 372 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | off | cross | cross- on | cross | cross- off | glass | cross | cross- on | cross- on | on | on | cross- on | cross- on | on | on | on | on | on | on | cross- on | glass | glass |
High Tide / height (m) | 12:33AM 0.90 | 12:25PM 0.84 | 1:14AM 0.95 | 12:55PM 0.85 | 1:52AM 0.98 | 1:24PM 0.87 | ||||||||||||||||||
Low Tide / height (m) | 6:16AM 0.34 | 6:26PM 0.18 | 7:00AM 0.32 | 7:06PM 0.11 | 7:40AM 0.31 | 7:44PM 0.06 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| Sunrise | - | - | 4:58 | - | - | - | - | - | - | - | 4:58 | - | - | - | - | - | - | - | 5:00 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:31 | - | - | - | - | - | - | - | 6:31 | - |
 |  |  | |  |  | | |  | | |  | | | | |  | | | | |  | | | |
Rain (mm) | - | - | - | - | - | 1 | - | - | 1 | - | 2 | 3 | 1 | 1 | 1 | - | 1 | - | 1 | - | - | - | - | - |
| Temp. °C | 24 | 23 | 24 | 27 | 28 | 28 | 27 | 25 | 25 | 24 | 25 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 21 | 21 |
| Feels °C (?) | 27 | 27 | 27 | 30 | 30 | 31 | 31 | 29 | 27 | 26 | 27 | 22 | 21 | 20 | 21 | 22 | 23 | 23 | 22 | 22 | 23 | 22 | 22 | 23 |
- 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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