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:
Monte Hermoso surfForecast / Buenos Aires / Argentina
48hr Weather and Surf, issued 2 pm Tuesday 16 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Monte Hermoso surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Monte Hermoso sea temperature is
21.7° C
(Which is 3.4°C warmer than normal for this time of year)How big are the waves at Monte Hermoso today?
The current surf forecast for Monte Hermoso at 7PM is: 0.9m 10s primary swell from a South-southeast direction and 0.2m 8s secondary swell from a East direction, 0.5m 3s secondary swell from a East direction (forecast issued at 02:00pm December 16). The wind direction is predicted to be cross-shore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | - | - |
| Afternoon (16 Dec) | 3.5ft (1.0m) | 11s |
| Evening (16 Dec) | 2.5ft (0.8m) | 10s |
Table - waves today at Monte Hermoso. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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) (?) | 12 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 3 | 4 | 4 | 8 | 4 | 4 | 3 | 5 | 5 | 6 | 6 | 6 | 10 | 9 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 46 | 242 | 184 | 131 | 98 | 65 | 29 | 27 | 16 | 9 | 29 | 35 | 5 | 16 | 6 | 5 | 67 | 84 | 212 | 161 | 53 | 56 | 78 | 52 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross | cross- off | off | off | off | cross- off | cross | cross- on | cross- on | cross- off | cross- off | glass | glass | cross- on | on | on | cross- on | cross- on | cross | cross- off | cross- off | cross- off |
High Tide / height (m) | 2:38PM 1.57 | 2:53AM 1.86 | 3:40PM 1.55 | 3:43AM 1.87 | 4:38PM 1.56 | 4:33AM 1.90 | ||||||||||||||||||
Low Tide / height (m) | 8:38PM 0.59 | 9:39AM 0.43 | 9:31PM 0.67 | 10:33AM 0.38 | 10:25PM 0.70 | |||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:33 | - | - | - | - | - | - | - | 5:33 | - | - | - | - | - | - | - | 5:33 | - |
| Sunset | - | - | 8:27 | - | - | - | - | - | - | - | 8:28 | - | - | - | - | - | - | - | 8:28 | - | - | - | - | - |
 | | |  | |  |  |  | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 17 | 19 | 18 | 17 | 18 | 18 | 25 | 29 | 25 | 20 | 19 | 17 | 16 | 16 | 20 | 21 | 20 | 18 | 17 | 16 | 14 | 12 | 19 |
| Feels °C (?) | 12 | 12 | 13 | 10 | 8 | 8 | 10 | 16 | 23 | 19 | 14 | 15 | 12 | 16 | 16 | 17 | 15 | 15 | 12 | 11 | 10 | 10 | 6 | 12 |
- 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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