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:
Big Rock surfForecast / WA – Margaret River / Australia
48hr Weather and Surf, issued 1 pm Monday 15 Dec 2025 AWSTForecast update in hr min s Forecast update imminent
Big Rock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Big Rock sea temperature is
20.4° C
(Which is 1.1°C warmer than normal for this time of year)How big are the waves at Big Rock today?
The current surf forecast for Big Rock at 4PM is: 1.2m 11s primary swell from a Southwest direction and 0.8m 16s secondary swell from a West-southwest direction (forecast issued at 01:00pm December 15). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 4.5ft (1.4m) | 12s |
| Afternoon (15 Dec) | 4.5ft (1.3m) | 11s |
| Evening (15 Dec) | 3ft (0.9m) | 16s |
Table - waves today at Big Rock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | |||||||||||||||||||||
| 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 | 2 AM | 5 AM | 8 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 16 | 16 | 15 | 15 | 14 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 12 | 12 | 11 | 10 | 10 | 10 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 501 | 389 | 364 | 397 | 425 | 398 | 576 | 947 | 947 | 530 | 544 | 422 | 522 | 899 | 811 | 4555 | 5461 | 4068 | 3202 | 2529 | 2052 | 1695 | 1129 | 838 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | on | cross- on | glass | on | glass | glass | on | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 7:15PM 0.69 | 7:25PM 0.76 | 7:42PM 0.82 | |||||||||||||||||||||
Low Tide / height (m) | 4:56AM 0.17 | 5:12AM 0.14 | 5:31AM 0.13 | |||||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 |
| Sunset | - | - | 7:25 | - | - | - | - | - | - | - | 7:27 | - | - | - | - | - | - | - | 7:27 | - | - | - | - | - |
 | | |  | | | | | |  | | |  | | |  | | | | | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 26 | 25 | 22 | 20 | 20 | 20 | 19 | 21 | 21 | 21 | 20 | 19 | 19 | 17 | 17 | 18 | 19 | 19 | 19 | 18 | 17 | 16 | 17 | 17 |
| Feels °C (?) | 25 | 24 | 23 | 22 | 22 | 21 | 21 | 23 | 21 | 21 | 18 | 18 | 16 | 12 | 12 | 13 | 15 | 14 | 14 | 14 | 12 | 11 | 13 | 13 |
- 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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