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:
Secret Harbour 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
Secret Harbour surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Secret Harbour sea temperature is
21.8° C
(Which is 1.6°C warmer than normal for this time of year)How big are the waves at Secret Harbour today?
The current surf forecast for Secret Harbour at 5PM is: 1.0m 11s primary swell from a West-southwest direction and 0.9m 4s 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) | 4ft (1.2m) | 12s |
| Afternoon (13 Dec) | 3.5ft (1.0m) | 12s |
| Evening (13 Dec) | 3ft (0.9m) | 11s |
Table - waves today at Secret Harbour. (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 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 16 | 16 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 359 | 306 | 243 | 217 | 226 | 375 | 273 | 226 | 170 | 173 | 193 | 200 | 193 | 196 | 215 | 215 | 215 | 204 | 170 | 133 | 186 | 179 | 224 | 215 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross | cross- off | cross- off | off | off | cross- off | cross- off | cross- off | off | off | cross- off | cross- off | cross- off | cross- on | on | cross- on | on | glass | glass | cross- on | cross- on |
High Tide / height (m) | 6:44PM 0.71 | 6:18PM 0.74 | 6:32PM 0.78 | |||||||||||||||||||||
Low Tide / height (m) | 6:37AM 0.38 | 6:08AM 0.32 | 5:24AM 0.26 | |||||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 |
| Sunset | - | - | 7:17 | - | - | - | - | - | - | - | 7:17 | - | - | - | - | - | - | - | 7:19 | - | - | - | - | - |
 | | |  | | | | |  |  |  |  | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 1 | 1 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 28 | 28 | 26 | 31 | 27 | 24 | 22 | 27 | 33 | 36 | 27 | 26 | 28 | 28 | 26 | 27 | 27 | 26 | 27 | 23 | 22 | 21 | 20 | 21 |
| Feels °C (?) | 26 | 24 | 21 | 29 | 19 | 17 | 16 | 21 | 29 | 35 | 19 | 21 | 22 | 23 | 24 | 26 | 25 | 26 | 27 | 24 | 25 | 24 | 21 | 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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