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 am Thursday 11 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 2PM is: 3.0m 12s primary swell from a South-southeast direction and 0.4m 10s secondary swell from a East-northeast direction (forecast issued at 08:00am December 11). An open ocean swell of 1.1m 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) | 10ft (3.0m) | 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
Thursday 11 | Friday 12 | Saturday 13 | Sun 14 | |||||||||||||||||||||
| 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) (?) | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 7 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2777 | 2455 | 2083 | 1963 | 1693 | 1238 | 1030 | 892 | 679 | 590 | 520 | 466 | 378 | 327 | 320 | 256 | 251 | 216 | 211 | 181 | 177 | 332 | 311 | 263 |
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 | off | cross- off | cross- off | glass | cross- on | cross | cross | glass | off | glass | off | glass | on | cross- on | cross- on | cross- on | cross | cross |
High Tide / height (m) | 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 | 5:55PM 0.37 | 11:52PM 0.30 | ||||||||||||
Low Tide / height (m) | 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 | 9:29PM 0.26 | |||||||||||||
Thursday 11 | Friday 12 | Saturday 13 | Sun 14 | |||||||||||||||||||||
| Sunrise | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:13 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:13 | - | - | - | - | - | - | - | 7:14 | - | - | - | - | - | - | - | 7:15 | - | - | - |
 |  | | | |  | | | | | |  |  |  |  | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 19 | 21 | 25 | 28 | 26 | 22 | 21 | 20 | 21 | 25 | 25 | 24 | 24 | 23 | 22 | 22 | 21 | 24 | 25 | 25 | 23 | 22 | 22 | 22 |
| Feels °C (?) | 14 | 16 | 20 | 25 | 25 | 22 | 21 | 19 | 21 | 27 | 25 | 24 | 25 | 26 | 24 | 24 | 22 | 26 | 26 | 26 | 23 | 22 | 22 | 23 |
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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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