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:
Maresias surfForecast / São Paulo / Brazil
48hr Weather and Surf, issued 2 pm Friday 12 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Maresias surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Maresias 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 Maresias today?
The current surf forecast for Maresias at 5PM is: 1.7m 11s primary swell from a South direction (forecast issued at 02:00pm December 12). An open ocean swell of 0.4m 9s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | - | - |
| Afternoon (12 Dec) | 6ft (1.8m) | 12s |
| Evening (12 Dec) | 5ft (1.5m) | 11s |
Table - waves today at Maresias. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1022 | 887 | 713 | 536 | 451 | 367 | 294 | 288 | 242 | 244 | 198 | 198 | 208 | 130 | 133 | 133 | 102 | 100 | 96 | 71 | 69 | 43 | 40 | 26 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | glass | glass | off | cross- off | cross- off | cross- off | off | glass | cross- off | off | off | off | off | cross- off | off | glass | glass | cross- off | cross- off | off | off | off | glass |
High Tide / height (m) | 7:44PM 0.80 | 10:15AM 0.75 | 10:06PM 0.79 | 11:15AM 0.78 | 11:46PM 0.86 | |||||||||||||||||||
Low Tide / height (m) | 3:06PM 0.58 | 3:43AM 0.41 | 4:14PM 0.51 | 4:49AM 0.42 | 5:11PM 0.41 | 5:46AM 0.41 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:09 | - |
| Sunset | - | - | 6:43 | - | - | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:44 | - | - | - | - | - |
 |  |  |  |  | | | |  | | |  |  | | | | | | | | | | |  | |
Rain (mm) | - | - | 1 | - | 2 | 4 | 4 | - | 2 | 2 | 1 | - | - | 2 | 1 | 1 | - | - | - | - | - | - | - | - |
| Temp. °C | 31 | 28 | 26 | 24 | 22 | 22 | 23 | 28 | 27 | 26 | 25 | 24 | 24 | 23 | 23 | 25 | 28 | 29 | 27 | 24 | 24 | 24 | 24 | 30 |
| Feels °C (?) | 32 | 31 | 29 | 26 | 24 | 24 | 25 | 31 | 31 | 31 | 29 | 27 | 27 | 25 | 25 | 27 | 31 | 33 | 31 | 26 | 26 | 27 | 27 | 33 |
- 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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