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:
Marion Bay surfForecast / TAS – East Coast / Australia
48hr Weather and Surf, issued 10 am Tuesday 16 Dec 2025 AEDTForecast update in hr min s Forecast update imminent
Marion Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Marion Bay sea temperature is
15.0° C
(Which is slightly warmer than usual)How big are the waves at Marion Bay today?
The current surf forecast for Marion Bay at 5PM is: 0.7m 11s primary swell from a South direction and 0.2m 14s secondary swell from a South-southeast direction, 0.5m 9s secondary swell from a Northeast direction (forecast issued at 10:00am December 16). The wind direction is predicted to be cross-offshore.
| Time (AEDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 3ft (0.9m) | 12s |
| Afternoon (16 Dec) | 2.5ft (0.8m) | 11s |
| Evening (16 Dec) | 2.5ft (0.7m) | 11s |
Table - waves today at Marion Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | |||||||||||||||||||||
| 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 | 11 PM | 2 AM | 5 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 6 | 6 | 6 | 13 | 13 | 4 | 14 | 14 | 14 | 14 | 14 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 299 | 232 | 170 | 121 | 119 | 116 | 82 | 55 | 54 | 52 | 33 | 33 | 31 | 31 | 18 | 14 | 13 | 13 | 16 | 35 | 40 | 66 | 61 | 58 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | cross- off | cross- off | cross- on | cross- on | cross | cross- off | off | off | glass | cross- on | on | cross- on | glass | cross- off | cross- off | glass | cross- on | cross- on | cross- on | on | on |
High Tide / height (m) | 5:59AM 1.00 | 7:10PM 0.66 | 6:32AM 1.02 | 8:09PM 0.67 | 7:09AM 1.04 | 9:02PM 0.68 | ||||||||||||||||||
Low Tide / height (m) | 1:12PM 0.31 | 11:48PM 0.49 | 1:55PM 0.26 | 12:29AM 0.52 | 2:36PM 0.21 | 1:13AM 0.54 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Fri 19 | |||||||||||||||||||||
| Sunrise | 5:24 | - | - | - | - | - | - | - | 5:24 | - | - | - | - | - | - | - | 5:24 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 8:43 | - | - | - | - | - | - | - | 8:43 | - | - | - | - | - | - | - | 8:44 | - | - | - |
 | | |  | |  | |  | | | | | | | | | | |  | | | | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 11 | 12 | 13 | 17 | 20 | 19 | 15 | 13 | 12 | 12 | 15 | 22 | 22 | 20 | 19 | 16 | 15 | 13 | 15 | 16 | 16 | 17 | 14 | 13 |
| Feels °C (?) | 7 | 7 | 8 | 13 | 17 | 17 | 12 | 11 | 10 | 10 | 13 | 21 | 19 | 18 | 18 | 15 | 13 | 11 | 15 | 15 | 14 | 16 | 12 | 12 |
- 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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