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:
Atlantida surfForecast / Rio Grande Do Sul / Brazil
48hr Weather and Surf, issued 8 pm Wednesday 10 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Atlantida surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Atlantida sea temperature is
23.6° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Atlantida today?
The current surf forecast for Atlantida at 2AM is: 3.0m 12s primary swell from a South-southeast direction and 0.9m 11s secondary swell from a East direction (forecast issued at 08:00pm December 10). An open ocean swell of 1.5m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 11.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Dec) | 10ft (3.0m) | 12s |
| Afternoon (11 Dec) | 8ft (2.5m) | 12s |
| Evening (11 Dec) | 7.5ft (2.3m) | 11s |
Table - waves today at Atlantida. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wed 10 | Thursday 11 | Friday 12 | Saturday 13 | |||||||||||||||||||||
| 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 | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1677 | 2155 | 2831 | 2633 | 2613 | 2455 | 2119 | 1952 | 1527 | 1261 | 1121 | 909 | 815 | 692 | 613 | 485 | 436 | 333 | 302 | 251 | 241 | 203 | 198 | 166 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | cross- off | cross- off | glass | cross- on | cross | cross | cross- off | off | off | glass | glass | on | cross- on |
High Tide / height (m) | 3:07PM 0.54 | 9:49PM 0.17 | 4:17AM 0.33 | 10:49AM 0.44 | 3:56PM 0.50 | 10:32PM 0.21 | 5:03AM 0.32 | 11:26AM 0.40 | 4:49PM 0.43 | 11:13PM 0.25 | 5:56AM 0.31 | 11:57AM 0.37 | ||||||||||||
Low Tide / height (m) | 7:37PM 0.11 | 12:30AM 0.08 | 7:02AM 0.21 | 1:03PM 0.39 | 8:19PM 0.16 | 1:20AM 0.12 | 7:47AM 0.23 | 1:55PM 0.34 | 8:57PM 0.21 | 2:15AM 0.17 | 8:31AM 0.26 | 2:54PM 0.29 | ||||||||||||
Wed 10 | Thursday 11 | Friday 12 | Saturday 13 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:13 | - | - | - |
| Sunset | 7:13 | - | - | - | - | - | - | - | 7:13 | - | - | - | - | - | - | - | 7:14 | - | - | - | - | - | - | - |
 |  | | |  |  | | | |  | |  | | |  | | | | | | | | | | |
Rain (mm) | 4 | 4 | 2 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 20 | 19 | 19 | 19 | 19 | 21 | 25 | 28 | 26 | 22 | 21 | 21 | 21 | 25 | 26 | 25 | 24 | 23 | 23 | 22 | 22 | 24 | 24 | 24 |
| Feels °C (?) | 15 | 14 | 14 | 13 | 13 | 16 | 20 | 25 | 25 | 22 | 21 | 21 | 21 | 26 | 26 | 25 | 25 | 25 | 24 | 23 | 24 | 26 | 25 | 23 |
- 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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