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:
Cassino surfForecast / Rio Grande Do Sul / Brazil
48hr Weather and Surf, issued 8 am Sunday 14 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Cassino surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cassino sea temperature is
22.4° C
(Which is slightly warmer than usual)How big are the waves at Cassino today?
The current surf forecast for Cassino at 1PM is: 0.6m 10s primary swell from a Southeast direction and 0.2m 9s secondary swell from a East direction, 0.4m 4s secondary swell from a East-northeast direction (forecast issued at 08:00am December 14). The wind direction is predicted to be cross-onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | 2ft (0.6m) | 10s |
| Afternoon (14 Dec) | 2ft (0.6m) | 10s |
| Evening (14 Dec) | 4ft (1.2m) | 5s |
Table - waves today at Cassino. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 14 | Monday 15 | Tuesday 16 | Wed 17 | |||||||||||||||||||||
| 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) (?) | 9 | 10 | 10 | 10 | 10 | 5 | 5 | 6 | 10 | 10 | 7 | 10 | 4 | 5 | 7 | 7 | 10 | 10 | 6 | 6 | 7 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 55 | 57 | 61 | 61 | 61 | 74 | 90 | 97 | 34 | 34 | 59 | 92 | 48 | 28 | 23 | 23 | 16 | 16 | 89 | 128 | 338 | 458 | 308 | 202 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross- off | cross- off | cross- off |
High Tide / height (m) | 3:45AM 0.33 | 10:09AM 0.27 | 4:11PM 0.35 | 10:46PM 0.30 | 4:37AM 0.35 | 11:04AM 0.29 | 5:12PM 0.30 | 11:52PM 0.36 | 5:25AM 0.37 | 11:50AM 0.29 | 6:10PM 0.26 | 12:42AM 0.41 | ||||||||||||
Low Tide / height (m) | 7:18AM 0.21 | 12:37PM 0.23 | 7:43PM 0.22 | 1:20AM 0.25 | 8:13AM 0.21 | 2:05PM 0.20 | 8:15PM 0.19 | 2:32AM 0.29 | 9:02AM 0.20 | 3:09PM 0.15 | 8:50PM 0.18 | |||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wed 17 | |||||||||||||||||||||
| Sunrise | 5:15 | - | - | - | - | - | - | - | 5:16 | - | - | - | - | - | - | - | 5:16 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:30 | - | - | - | - | - | - | - | 7:30 | - | - | - | - | - | - | - | 7:30 | - | - | - |
 | | | | |  | |  |  | |  | |  |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 5 | 1 | 1 | - | - | - | - | - | - | - | - | - |
| Temp. °C | 22 | 24 | 25 | 26 | 23 | 22 | 22 | 22 | 22 | 24 | 25 | 22 | 20 | 20 | 19 | 19 | 19 | 21 | 22 | 22 | 19 | 18 | 18 | 17 |
| Feels °C (?) | 25 | 25 | 25 | 26 | 22 | 21 | 21 | 22 | 22 | 25 | 27 | 19 | 17 | 20 | 18 | 17 | 18 | 19 | 18 | 17 | 13 | 12 | 14 | 14 |
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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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