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 Sunday 14 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
24.6° C
(Which is normal for this time of year)How big are the waves at Maresias today?
The current surf forecast for Maresias at 9PM is: 0.7m 9s primary swell from a South-southeast direction and 0.3m 6s secondary swell from a Southeast direction (forecast issued at 02:00pm December 14). An open ocean swell of 0.5m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | - | - |
| Afternoon (14 Dec) | 2.5ft (0.7m) | 10s |
| Evening (14 Dec) | 2.5ft (0.7m) | 9s |
Table - waves today at Maresias. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| 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) (?) | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 9 | 10 | 10 | 10 | 9 | 9 | 9 | 10 | 10 | 10 | 5 | 7 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 131 | 100 | 96 | 92 | 90 | 42 | 40 | 40 | 86 | 42 | 78 | 75 | 72 | 49 | 48 | 49 | 51 | 54 | 38 | 100 | 312 | 600 | 825 | 671 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross | cross- off | cross- off | off | off | glass | cross- on | cross- on | cross- on | glass | cross- off | cross- off | off | off | glass | glass | on | cross- on | on | on | on | on | on |
High Tide / height (m) | 11:15AM 0.78 | 11:46PM 0.86 | 11:54AM 0.82 | 12:38AM 0.93 | 12:28PM 0.86 | 1:18AM 0.99 | ||||||||||||||||||
Low Tide / height (m) | 5:11PM 0.41 | 5:46AM 0.41 | 5:59PM 0.32 | 6:36AM 0.39 | 6:41PM 0.23 | 7:20AM 0.36 | ||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - |
| Sunset | - | - | 6:44 | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - |
 | | |  |  | |  | | | | |  | | |  | |  | |  |  |  | | | | |
Rain (mm) | 1 | 2 | 2 | - | - | - | - | - | 1 | 1 | 4 | 4 | 2 | - | - | - | - | - | 28 | 32 | 4 | 3 | - | - |
| Temp. °C | 28 | 28 | 26 | 24 | 24 | 24 | 25 | 28 | 29 | 29 | 26 | 24 | 25 | 25 | 25 | 31 | 30 | 31 | 25 | 23 | 23 | 21 | 21 | 24 |
| Feels °C (?) | 33 | 32 | 31 | 27 | 27 | 27 | 29 | 31 | 33 | 33 | 32 | 27 | 28 | 28 | 28 | 35 | 34 | 35 | 26 | 25 | 25 | 21 | 22 | 24 |
- 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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