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 Saturday 13 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
22.1° C
(Which is 1.5°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 4PM is: 1.0m 12s primary swell from a West-southwest direction and 0.2m 16s secondary swell from a West-southwest direction, 1.5m 6s secondary swell from a South-southwest direction (forecast issued at 01:00pm December 13). The wind direction is predicted to be cross-onshore.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 5ft (1.6m) | 12s |
| Afternoon (13 Dec) | 3.5ft (1.1m) | 12s |
| Evening (13 Dec) | 3.5ft (1.0m) | 12s |
Table - waves today at Back Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | 12 | 7 | 11 | 11 | 11 | 11 | 11 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 16 | 16 | 16 | 16 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 638 | 330 | 280 | 275 | 243 | 251 | 553 | 466 | 422 | 186 | 195 | 151 | 346 | 309 | 336 | 330 | 325 | 289 | 285 | 298 | 295 | 402 | 469 | 434 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | off | cross- on | cross | cross- off | off | off | cross- off | cross- off | cross- on | cross- on | cross- on | glass | on | cross- on | cross- on | cross- on |
High Tide / height (m) | 6:09PM 0.49 | 6:20PM 0.55 | 6:40PM 0.59 | |||||||||||||||||||||
Low Tide / height (m) | 7:04AM 0.22 | 4:19AM 0.17 | 4:29AM 0.12 | |||||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 |
| Sunset | - | - | 7:15 | - | - | - | - | - | - | - | 7:16 | - | - | - | - | - | - | - | 7:16 | - | - | - | - | - |
 | |  |  | | |  | |  | |  | | | | | | | | | | | | | | |
Rain (mm) | - | - | 2 | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 30 | 29 | 24 | 23 | 28 | 27 | 25 | 30 | 36 | 30 | 30 | 27 | 27 | 27 | 26 | 28 | 27 | 25 | 24 | 23 | 22 | 21 | 21 | 22 |
| Feels °C (?) | 26 | 25 | 18 | 19 | 25 | 26 | 23 | 26 | 32 | 28 | 30 | 23 | 23 | 24 | 25 | 27 | 25 | 25 | 25 | 26 | 23 | 23 | 22 | 22 |
- 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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