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 Saturday 13 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
21.6° 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 5PM is: 0.7m 7s primary swell from a South direction and 0.4m 10s secondary swell from a Southeast direction (forecast issued at 02:00pm December 13). The wind direction is predicted to be cross-onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | - | - |
| Afternoon (13 Dec) | 2.5ft (0.8m) | 7s |
| Evening (13 Dec) | 2ft (0.6m) | 7s |
Table - waves today at Monte Hermoso. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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) (?) | 6 | 7 | 7 | 7 | 8 | 7 | 9 | 4 | 4 | 5 | 5 | 7 | 10 | 10 | 4 | 5 | 6 | 6 | 7 | 7 | 6 | 10 | 8 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 46 | 58 | 51 | 37 | 40 | 27 | 24 | 18 | 20 | 24 | 28 | 33 | 76 | 74 | 25 | 108 | 126 | 112 | 173 | 145 | 78 | 34 | 76 | 117 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | cross- on | glass | off | cross- off | cross- off | cross | on | cross- on | cross- off | off | cross- off | cross- off | cross | cross- on | cross- on | on | cross- on | cross- on | cross- on | on | cross- on | cross- on |
High Tide / height (m) | 11:45AM 1.87 | 12:30AM 1.89 | 12:39PM 1.73 | 1:17AM 1.87 | 1:37PM 1.63 | 2:05AM 1.86 | ||||||||||||||||||
Low Tide / height (m) | 6:16PM 0.23 | 6:51AM 0.48 | 7:01PM 0.36 | 7:47AM 0.48 | 7:48PM 0.49 | 8:43AM 0.46 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:33 | - | - | - | - | - | - | - | 5:33 | - | - | - | - | - | - | - | 5:33 | - |
| Sunset | - | - | 8:24 | - | - | - | - | - | - | - | 8:25 | - | - | - | - | - | - | - | 8:25 | - | - | - | - | - |
 |  | |  |  | | |  | | | |  | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 21 | 21 | 23 | 23 | 20 | 23 | 22 | 21 | 19 | 21 | 24 | 23 | 19 | 19 | 19 | 18 | 18 | 19 | 16 | 16 | 16 | 16 | 16 | 16 |
| Feels °C (?) | 17 | 18 | 20 | 20 | 14 | 17 | 15 | 12 | 15 | 17 | 18 | 17 | 12 | 10 | 15 | 9 | 10 | 11 | 9 | 10 | 10 | 12 | 12 | 11 |
- 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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