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 1 pm Monday 15 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
22.4° C
(Which is 1.7°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 7PM is: 1.1m 12s primary swell from a Southwest direction and 0.8m 16s secondary swell from a West-southwest direction (forecast issued at 01:00pm December 15). The wind direction is predicted to be onshore.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 4ft (1.2m) | 12s |
| Afternoon (15 Dec) | 3.5ft (1.1m) | 12s |
| Evening (15 Dec) | 2.5ft (0.8m) | 16s |
Table - waves today at Back Beach. (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) (?) | 12 | 12 | 12 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 12 | 12 | 11 | 11 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 378 | 319 | 314 | 298 | 295 | 402 | 469 | 434 | 417 | 752 | 773 | 519 | 525 | 422 | 485 | 697 | 1874 | 3020 | 2890 | 2290 | 1888 | 1567 | 1365 | 1090 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | on | cross | cross- on | cross- on | on | on | on | on | on | cross- on | cross- on | cross- on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross |
High Tide / height (m) | 6:40PM 0.59 | 7:04PM 0.63 | 7:31PM 0.66 | |||||||||||||||||||||
Low Tide / height (m) | 4:29AM 0.12 | 4:47AM 0.09 | 5:10AM 0.06 | |||||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 |
| Sunset | - | - | 7:16 | - | - | - | - | - | - | - | 7:17 | - | - | - | - | - | - | - | 7:19 | - | - | - | - | - |
 | |  |  | | | | | | | | | | |  | | | | |  | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 25 | 25 | 24 | 24 | 23 | 22 | 24 | 25 | 23 | 22 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 17 | 19 |
| Feels °C (?) | 24 | 25 | 27 | 25 | 26 | 24 | 23 | 25 | 25 | 21 | 20 | 17 | 18 | 18 | 16 | 16 | 14 | 14 | 14 | 15 | 15 | 15 | 13 | 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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