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:
Rivoli Bay surfForecast / SA – East Coast / Australia
48hr Weather and Surf, issued 9 pm Tuesday 16 Dec 2025 ACDTForecast update in hr min s Forecast update imminent
Rivoli Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Rivoli Bay sea temperature is
18.0° C
(Which is 2.1°C warmer than normal for this time of year)How big are the waves at Rivoli Bay today?
The current surf forecast for Rivoli Bay at 1AM is: 1.2m 10s primary swell from a South-southwest direction and 0.8m 11s secondary swell from a Southwest direction (forecast issued at 09:30pm December 16). The wind direction is predicted to be cross-shore.
| Time (ACDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 3.5ft (1.1m) | 10s |
| Afternoon (17 Dec) | 1.5ft (0.5m) | 15s |
| Evening (17 Dec) | 1.5ft (0.5m) | 15s |
Table - waves today at Rivoli Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tue 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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 | 7 AM | 10 AM | 1 PM | 4 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 14 | 13 | 13 | 12 | 14 | 13 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 885 | 698 | 306 | 250 | 214 | 183 | 272 | 107 | 107 | 132 | 164 | 123 | 221 | 390 | 418 | 363 | 352 | 331 | 297 | 471 | 451 | 431 | 466 | 321 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross | cross- off | off | cross- off | cross | cross- on | on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- on | cross- off | cross- off | cross- off | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 12:06AM 0.75 | 12:31AM 0.82 | 10:41AM 0.32 | 12:58AM 0.87 | 11:34AM 0.32 | |||||||||||||||||||
Low Tide / height (m) | 4:06PM 0.16 | 8:55AM 0.31 | 4:48PM 0.13 | 8:53AM 0.30 | ||||||||||||||||||||
Tue 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:43 | - | - | - | - | - | - | - | 5:43 | - | - | - | - | - | - | - | 5:43 | - | - | - |
| Sunset | 8:27 | - | - | - | - | - | - | - | 8:27 | - | - | - | - | - | - | - | 8:28 | - | - | - | - | - | - | - |
 |  | | | | | | | | | | | | | | |  |  |  | | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 15 | 16 | 16 | 17 | 20 | 26 | 25 | 25 | 23 | 22 | 22 | 21 | 22 | 30 | 30 | 28 | 23 | 23 | 21 | 20 | 17 | 17 | 16 | 15 |
| Feels °C (?) | 9 | 12 | 12 | 14 | 16 | 22 | 20 | 20 | 20 | 19 | 18 | 17 | 17 | 25 | 23 | 24 | 21 | 20 | 18 | 17 | 16 | 16 | 14 | 11 |
- 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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