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:
La Posta surfForecast / South / Uruguay
48hr Weather and Surf, issued 2 am Friday 12 Dec 2025 -03Forecast update in hr min s Forecast update imminent
La Posta surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's La Posta sea temperature is
20.5° C
(Which is slightly warmer than usual)How big are the waves at La Posta today?
The current surf forecast for La Posta at 6AM is: 1.4m 11s primary swell from a East-southeast direction (forecast issued at 02:00am December 12). The wind direction is predicted to be offshore and the swell rating is 2.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 4.5ft (1.3m) | 11s |
| Afternoon (12 Dec) | 4ft (1.2m) | 10s |
| Evening (12 Dec) | 3.5ft (1.1m) | 10s |
Table - waves today at La Posta. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| 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 | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 5 | 6 | 6 | 7 | 7 | 6 | 6 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 544 | 524 | 452 | 379 | 279 | 274 | 274 | 232 | 227 | 186 | 154 | 154 | 154 | 107 | 154 | 104 | 239 | 287 | 427 | 374 | 254 | 203 | 151 | 107 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- off | off | cross- off | cross | cross- on | cross | cross- off | off | off | cross- off | cross- off | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross- off | cross- off |
High Tide / height (m) | 1:55AM 0.23 | 6:22PM 0.21 | 3:06AM 0.24 | 6:14PM 0.20 | 4:08AM 0.25 | 6:13PM 0.21 | ||||||||||||||||||
Low Tide / height (m) | 9:40PM 0.15 | 10:16AM 0.07 | 10:31PM 0.16 | 11:16AM 0.06 | 11:20PM 0.17 | 12:10PM 0.06 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| Sunrise | - | - | 5:18 | - | - | - | - | - | - | - | 5:18 | - | - | - | - | - | - | - | 5:18 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:45 | - | - | - | - | - | - | - | 7:46 | - | - | - | - | - | - | - | 7:47 | - |
 |  |  |  | | | |  | | | | | | |  |  | | | |  |  | | |  | |
Rain (mm) | - | 2 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 1 | - | 1 | 5 |
| Temp. °C | 19 | 19 | 18 | 23 | 24 | 23 | 24 | 22 | 21 | 21 | 22 | 27 | 29 | 26 | 22 | 22 | 21 | 20 | 19 | 18 | 19 | 21 | 20 | 19 |
| Feels °C (?) | 20 | 19 | 17 | 21 | 21 | 20 | 24 | 21 | 18 | 18 | 18 | 23 | 25 | 23 | 19 | 17 | 18 | 16 | 14 | 14 | 14 | 18 | 19 | 18 |
- 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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