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 8 am Friday 12 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
21.4° C
(Which is 3.2°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 3PM is: 0.4m 12s primary swell from a East-southeast direction and 0.2m 5s secondary swell from a East direction, 0.5m 3s secondary swell from a West direction (forecast issued at 08:00am December 12). The wind direction is predicted to be cross-shore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 1.5ft (0.4m) | 12s |
| Afternoon (12 Dec) | 1.5ft (0.4m) | 12s |
| Evening (12 Dec) | 1.5ft (0.4m) | 11s |
Table - waves today at Monte Hermoso. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| 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 | 11 | 11 | 11 | 7 | 10 | 10 | 8 | 9 | 10 | 4 | 5 | 6 | 6 | 12 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 57 | 56 | 56 | 55 | 74 | 49 | 48 | 47 | 47 | 47 | 182 | 81 | 92 | 139 | 40 | 39 | 26 | 21 | 53 | 50 | 30 | 27 | 80 | 73 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross | cross | cross- on | cross- off | cross | cross | cross | cross | cross- on | on | cross- on | cross | cross- off | off | cross- off | cross- on | on | cross- on | cross | cross- off | cross- off | cross- off |
High Tide / height (m) | 10:53AM 2.01 | 11:43PM 1.90 | 11:45AM 1.87 | 12:30AM 1.89 | 12:39PM 1.73 | 1:17AM 1.87 | ||||||||||||||||||
Low Tide / height (m) | 5:01AM 0.45 | 5:31PM 0.11 | 5:56AM 0.47 | 6:16PM 0.23 | 6:51AM 0.48 | 7:01PM 0.36 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | 5:33 | - | - | - | - | - | - | - | 5:33 | - | - | - | - | - | - | - | 5:33 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 8:23 | - | - | - | - | - | - | - | 8:24 | - | - | - | - | - | - | - | 8:25 | - | - | - |
 | | | | |  |  |  |  |  | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 19 | 25 | 26 | 28 | 27 | 23 | 26 | 24 | 22 | 21 | 21 | 23 | 22 | 18 | 17 | 18 | 19 | 20 | 19 | 20 | 19 | 17 | 16 | 18 |
| Feels °C (?) | 15 | 17 | 20 | 21 | 22 | 21 | 21 | 18 | 15 | 13 | 17 | 19 | 18 | 12 | 11 | 13 | 13 | 15 | 14 | 15 | 14 | 12 | 11 | 10 |
- 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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