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:
Stark Bay surfForecast / WA – Rottnest Island / Australia
48hr Weather and Surf, issued 1 am Wednesday 17 Dec 2025 AWSTForecast update in hr min s Forecast update imminent
Stark Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Stark Bay sea temperature is
22.0° C
(Which is 1.6°C warmer than normal for this time of year)How big are the waves at Stark Bay today?
The current surf forecast for Stark Bay at 9AM is: 1.1m 14s primary swell from a West-southwest direction and 1.7m 7s secondary swell from a Southwest direction (forecast issued at 01:00am December 17). The wind direction is predicted to be cross-shore.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 3.5ft (1.1m) | 14s |
| Afternoon (17 Dec) | 8ft (2.5m) | 13s |
| Evening (17 Dec) | 8ft (2.5m) | 11s |
Table - waves today at Stark Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| 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 | 5 PM | 8 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 15 | 15 | 15 | 14 | 14 | 13 | 11 | 11 | 10 | 9 | 9 | 11 | 10 | 10 | 12 | 7 | 8 | 9 | 11 | 11 | 11 | 11 | 5 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 266 | 249 | 305 | 443 | 512 | 1944 | 1545 | 1682 | 1001 | 450 | 406 | 401 | 510 | 456 | 907 | 279 | 419 | 238 | 303 | 172 | 172 | 258 | 102 | 220 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross- off | off | off | off | off | cross | cross | cross | cross |
High Tide / height (m) | 7:31PM 0.95 | 8:01PM 1.03 | ||||||||||||||||||||||
Low Tide / height (m) | 4:53AM 0.25 | 5:09AM 0.27 | 5:33AM 0.29 | |||||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:05 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:07 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:20 | - | - | - | - | - | - | - | 7:21 | - | - | - | - | - | - | - | 7:22 | - |
 |  | |  |  | | | | | | | | | | | | | | | | | | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 20 | 20 | 19 | 18 | 17 | 18 | 18 | 18 | 18 | 16 | 15 | 16 | 20 | 21 | 20 | 22 | 22 | 19 | 18 | 19 | 21 | 21 | 20 | 20 |
| Feels °C (?) | 18 | 16 | 13 | 12 | 11 | 12 | 11 | 10 | 9 | 9 | 9 | 10 | 16 | 15 | 14 | 17 | 14 | 13 | 13 | 15 | 18 | 15 | 12 | 12 |
- 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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