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:
Marengo surfForecast / VIC – Cape Otway / Australia
48hr Weather and Surf, issued 4 am Monday 15 Dec 2025 AEDTForecast update in hr min s Forecast update imminent
Marengo surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Marengo sea temperature is
16.5° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Marengo today?
The current surf forecast for Marengo at 11AM is: 4.5m 13s primary swell from a Southwest direction and 3.0m 14s secondary swell from a South-southwest direction (forecast issued at 04:00am December 15). The wind direction is predicted to be cross-offshore.
| Time (AEDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 15ft (4.5m) | 14s |
| Afternoon (15 Dec) | 11ft (3.5m) | 13s |
| Evening (15 Dec) | 8ft (2.4m) | 12s |
Table - waves today at Marengo. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 11426 | 9969 | 7456 | 7668 | 4332 | 3937 | 2023 | 1498 | 1354 | 1177 | 1000 | 872 | 718 | 503 | 494 | 423 | 339 | 260 | 214 | 209 | 173 | 135 | 126 | 98 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | cross- on |
High Tide / height (m) | 10:15AM 1.70 | 8:59PM 1.52 | 11:25AM 1.82 | 10:07PM 1.43 | 12:21PM 1.95 | |||||||||||||||||||
Low Tide / height (m) | 3:01AM 0.57 | 4:06PM 1.19 | 4:02AM 0.55 | 5:42PM 1.20 | 4:57AM 0.52 | 6:50PM 1.15 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| Sunrise | - | - | 5:54 | - | - | - | - | - | - | - | 5:54 | - | - | - | - | - | - | - | 5:54 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 8:45 | - | - | - | - | - | - | - | 8:45 | - | - | - | - | - | - | - | 8:46 | - |
 | |  |  | | | | | |  | |  | | | |  | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 12 | 12 | 13 | 14 | 13 | 12 | 11 | 11 | 12 | 12 | 13 | 14 | 14 | 13 | 11 | 11 | 11 | 15 | 20 | 22 | 21 | 18 | 18 |
| Feels °C (?) | 5 | 5 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 10 | 10 | 11 | 12 | 12 | 12 | 10 | 9 | 8 | 13 | 18 | 20 | 19 | 16 | 15 |
- 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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