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 8 am Monday 15 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 3PM is: 0.4m 10s primary swell from a South-southeast direction and 0.5m 9s secondary swell from a South direction (forecast issued at 08:00am December 15). The wind direction is predicted to be cross-shore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 1.5ft (0.5m) | 9s |
| Afternoon (15 Dec) | 1.5ft (0.5m) | 9s |
| Evening (15 Dec) | 2ft (0.6m) | 10s |
Table - waves today at Maresias. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| 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 | 9 | 10 | 9 | 10 | 10 | 10 | 9 | 9 | 9 | 10 | 10 | 10 | 5 | 6 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 40 | 40 | 86 | 42 | 78 | 75 | 72 | 49 | 48 | 49 | 52 | 54 | 64 | 119 | 300 | 535 | 385 | 445 | 612 | 546 | 439 | 383 | 333 | 203 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- on | on | cross | cross- off | cross- off | cross- off | off | off | off | cross- on | cross- on | cross- on | on | on | on | on | on | on | cross- on | cross | cross | cross- off | cross- off |
High Tide / height (m) | 11:54AM 0.82 | 12:38AM 0.93 | 12:28PM 0.86 | 1:18AM 0.99 | 12:59PM 0.89 | 1:53AM 1.05 | ||||||||||||||||||
Low Tide / height (m) | 5:46AM 0.41 | 5:59PM 0.32 | 6:36AM 0.39 | 6:41PM 0.23 | 7:20AM 0.36 | 7:20PM 0.16 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| Sunrise | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:45 | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - | - | - | 6:45 | - | - | - |
 | |  | | |  |  | | |  | | |  |  | | |  | | | | | | | | |
Rain (mm) | - | - | 2 | 3 | 2 | 1 | - | - | - | - | - | - | 34 | 3 | 4 | 4 | 1 | - | - | - | - | - | - | - |
| Temp. °C | 25 | 28 | 28 | 28 | 27 | 25 | 25 | 25 | 26 | 31 | 32 | 32 | 23 | 23 | 23 | 22 | 21 | 23 | 24 | 23 | 21 | 21 | 20 | 20 |
| Feels °C (?) | 29 | 31 | 32 | 32 | 32 | 28 | 28 | 28 | 29 | 34 | 35 | 36 | 26 | 24 | 26 | 22 | 22 | 22 | 24 | 24 | 22 | 21 | 21 | 21 |
- 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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