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 pm Sunday 14 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
21.5° C
(Which is 1.7°C warmer than normal for this time of year)How big are the waves at La Posta today?
The current surf forecast for La Posta at 7PM is: 1.1m 5s primary swell from a Southeast direction and 0.4m 5s secondary swell from a South-southwest direction, 0.2m 8s secondary swell from a South direction (forecast issued at 02:00pm December 14). The wind direction is predicted to be cross-onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | - | - |
| Afternoon (14 Dec) | 3.5ft (1.1m) | 4s |
| Evening (14 Dec) | 3.5ft (1.1m) | 5s |
Table - waves today at La Posta. (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) (?) | 9 | 4 | 5 | 5 | 5 | 5 | 5 | 10 | 10 | 5 | 11 | 11 | 5 | 6 | 6 | 7 | 6 | 6 | 7 | 7 | 6 | 6 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 166 | 52 | 51 | 53 | 48 | 36 | 26 | 24 | 24 | 17 | 22 | 116 | 104 | 127 | 123 | 206 | 212 | 212 | 200 | 148 | 101 | 83 | 89 | 77 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | on | on | on | on | cross- on | cross- on | cross | glass | glass | on | on | cross- on | cross- on | cross- on | on | on | on | cross- on | cross- off | off | off |
High Tide / height (m) | 6:13PM 0.21 | 5:00AM 0.26 | 6:40PM 0.21 | 5:44AM 0.28 | 7:12PM 0.21 | 6:24AM 0.29 | ||||||||||||||||||
Low Tide / height (m) | 12:10PM 0.06 | 12:02AM 0.18 | 12:59PM 0.06 | 10:40PM 0.18 | 1:43PM 0.05 | 10:37PM 0.17 | ||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:18 | - | - | - | - | - | - | - | 5:20 | - | - | - | - | - | - | - | 5:20 | - |
| Sunset | - | - | 7:47 | - | - | - | - | - | - | - | 7:49 | - | - | - | - | - | - | - | 7:49 | - | - | - | - | - |
 |  |  |  | |  |  | | | | | | |  |  | | | | | | | | | | |
Rain (mm) | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 22 | 21 | 20 | 19 | 19 | 19 | 19 | 20 | 19 | 20 | 21 | 20 | 18 | 18 | 18 | 19 | 18 | 18 | 17 | 16 | 15 | 14 | 12 | 18 |
| Feels °C (?) | 19 | 18 | 18 | 17 | 19 | 19 | 18 | 19 | 19 | 20 | 21 | 20 | 12 | 14 | 13 | 11 | 11 | 11 | 11 | 13 | 13 | 12 | 9 | 15 |
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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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