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:
Back Beach surfForecast / WA – Perth City / Australia
48hr Weather and Surf, issued 7 pm Tuesday 16 Dec 2025 AWSTForecast update in hr min s Forecast update imminent
Back Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Back Beach sea temperature is
23.0° C
(Which is 2.3°C warmer than normal for this time of year)How big are the waves at Back Beach today?
The current surf forecast for Back Beach at 10PM is: 1.1m 15s primary swell from a West-southwest direction and 0.8m 11s secondary swell from a West-southwest direction, 0.8m 4s secondary swell from a Southwest direction (forecast issued at 07:00pm December 16). The wind direction is predicted to be cross-onshore.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | - | - |
| Afternoon (16 Dec) | 4.5ft (1.3m) | 15s |
| Evening (16 Dec) | 3.5ft (1.1m) | 15s |
Table - waves today at Back Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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 | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 8 | 8 | 9 | 9 | 9 | 11 | 5 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 773 | 525 | 525 | 422 | 485 | 697 | 756 | 2496 | 2715 | 2387 | 1839 | 1655 | 1514 | 1223 | 918 | 833 | 799 | 530 | 515 | 481 | 349 | 316 | 347 | 133 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- off | cross- off | cross- off | cross | cross- on |
High Tide / height (m) | 7:04PM 0.63 | 7:31PM 0.66 | 8:01PM 0.68 | |||||||||||||||||||||
Low Tide / height (m) | 4:47AM 0.09 | 5:10AM 0.06 | 5:37AM 0.05 | |||||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - |
| Sunset | 7:17 | - | - | - | - | - | - | - | 7:19 | - | - | - | - | - | - | - | 7:19 | - | - | - | - | - | - | - |
 |  | | |  |  | | | | | | | | | | | | | | | |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 22 | 21 | 20 | 20 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 18 | 23 | 23 | 22 | 21 | 21 | 22 | 20 | 23 | 29 | 25 |
| Feels °C (?) | 20 | 20 | 19 | 18 | 17 | 15 | 13 | 13 | 12 | 12 | 13 | 12 | 12 | 13 | 19 | 18 | 17 | 17 | 20 | 16 | 15 | 19 | 28 | 20 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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