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:
Matinhos surfForecast / Paraná / Brazil
48hr Weather and Surf, issued 2 am Wednesday 17 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Matinhos surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Matinhos sea temperature is
26.4° C
(Which is 1.8°C warmer than normal for this time of year)How big are the waves at Matinhos today?
The current surf forecast for Matinhos at 8AM is: 1.6m 8s primary swell from a South-southeast direction and 0.4m 8s secondary swell from a East direction (forecast issued at 02:00am December 17). The wind direction is predicted to be cross-onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 5ft (1.5m) | 8s |
| Afternoon (17 Dec) | 4ft (1.2m) | 8s |
| Evening (17 Dec) | 2.5ft (0.8m) | 8s |
Table - waves today at Matinhos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| 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) (?) | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 8 | 8 | 6 | 11 | 11 | 9 | 8 | 8 | 11 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 4 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 593 | 500 | 403 | 300 | 236 | 164 | 128 | 80 | 54 | 40 | 66 | 65 | 73 | 46 | 22 | 20 | 19 | 21 | 29 | 16 | 16 | 17 | 22 | 34 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | on | on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- on | cross- on | cross | cross- off | cross- off | off | glass | glass | cross- on | cross- on | cross | cross |
High Tide / height (m) | 1:15PM 1.14 | 2:00AM 1.27 | 1:58PM 1.17 | 2:44AM 1.31 | 2:39PM 1.20 | |||||||||||||||||||
Low Tide / height (m) | 7:46AM 0.42 | 7:37PM 0.19 | 8:15AM 0.42 | 8:05PM 0.13 | 8:38AM 0.42 | 8:33PM 0.09 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| Sunrise | - | - | 5:16 | - | - | - | - | - | - | - | 5:16 | - | - | - | - | - | - | - | 5:18 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:02 | - |
 | |  | |  | | |  |  | |  | | | | | | | | | | | | | | |
Rain (mm) | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 21 | 20 | 19 | 22 | 23 | 24 | 23 | 22 | 21 | 21 | 20 | 22 | 24 | 25 | 24 | 24 |
| Feels °C (?) | 18 | 19 | 20 | 20 | 22 | 21 | 22 | 21 | 21 | 20 | 19 | 22 | 22 | 22 | 22 | 21 | 22 | 22 | 21 | 24 | 25 | 26 | 25 | 25 |
- 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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