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:
Pennington Bay surfForecast / SA – Kangaroo Island / Australia
48hr Weather and Surf, issued 9 am Wednesday 17 Dec 2025 ACDTForecast update in hr min s Forecast update imminent
Pennington Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Pennington Bay sea temperature is
17.7° C
(Which is slightly warmer than usual)How big are the waves at Pennington Bay today?
The current surf forecast for Pennington Bay at 5PM is: 0.9m 10s primary swell from a South-southeast direction and 0.3m 15s secondary swell from a South-southwest direction (forecast issued at 09:30am December 17). An open ocean swell of 0.3m 3s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (ACDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 3.5ft (1.1m) | 10s |
| Afternoon (17 Dec) | 3ft (0.9m) | 10s |
| Evening (17 Dec) | 2.5ft (0.8m) | 9s |
Table - waves today at Pennington Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
| 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 10 | 9 | 9 | 14 | 14 | 13 | 15 | 15 | 14 | 14 | 14 | 12 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 260 | 255 | 200 | 157 | 118 | 83 | 69 | 106 | 59 | 115 | 155 | 200 | 134 | 184 | 110 | 192 | 176 | 171 | 168 | 384 | 371 | 425 | 293 | 276 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | on | cross- on | glass | cross- off | off | off | cross- off | cross- on | cross- on | on | cross- on | on | on | on | on | on | on | on | on | on |
High Tide / height (m) | 4:03PM 0.65 | 3:29AM 1.27 | 4:53PM 0.67 | 4:08AM 1.34 | 5:31PM 0.70 | |||||||||||||||||||
Low Tide / height (m) | 10:28AM 0.44 | 8:04PM 0.56 | 11:02AM 0.34 | 9:01PM 0.54 | 11:33AM 0.26 | 9:45PM 0.52 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
| Sunrise | 5:56 | - | - | - | - | - | - | - | 5:56 | - | - | - | - | - | - | - | 5:56 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 8:31 | - | - | - | - | - | - | - | 8:31 | - | - | - | - | - | - | - | 8:32 | - | - | - |
 | | | | |  | | | | | | | | | |  |  |  | | | |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 21 | 25 | 28 | 31 | 27 | 26 | 26 | 25 | 25 | 28 | 32 | 28 | 26 | 23 | 20 | 19 | 18 | 21 | 20 | 18 | 15 | 14 | 13 | 13 |
| Feels °C (?) | 19 | 21 | 23 | 27 | 24 | 24 | 24 | 22 | 21 | 23 | 28 | 25 | 24 | 21 | 18 | 18 | 15 | 19 | 17 | 14 | 10 | 10 | 10 | 10 |
- 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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