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:
Avalanche surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 7 am Friday 12 Dec 2025 HSTForecast update in hr min s Forecast update imminent
Avalanche surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Avalanche sea temperature is
25.8° C
(Which is slightly warmer than usual)How big are the waves at Avalanche today?
The current surf forecast for Avalanche at 1PM is: 1.3m 11s primary swell from a Northwest direction and 1.0m 12s secondary swell from a North direction (forecast issued at 07:00am December 12). The wind direction is predicted to be glassy and the swell rating is 3.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 4.5ft (1.4m) | 11s |
| Afternoon (12 Dec) | 3.5ft (1.1m) | 12s |
| Evening (12 Dec) | 4ft (1.2m) | 11s |
Table - waves today at Avalanche. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| 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 | 11 PM | 2 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 15 | 11 | 13 | 14 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 780 | 485 | 423 | 327 | 330 | 358 | 410 | 478 | 530 | 432 | 450 | 385 | 324 | 255 | 204 | 163 | 128 | 178 | 496 | 737 | 1735 | 1589 | 1457 | 1112 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | glass | glass | glass | glass | off | cross- off | cross- off | cross | cross- off | cross | cross | cross | cross | cross | cross | cross- on | cross | cross | cross | cross | cross- off | cross- off | cross- off |
High Tide / height (m) | 9:04AM 0.34 | 11:26PM 0.34 | 9:53AM 0.28 | 12:08AM 0.41 | 10:43AM 0.23 | 12:44AM 0.45 | ||||||||||||||||||
Low Tide / height (m) | 2:16AM 0.19 | 3:11PM 0.02 | 4:07AM 0.20 | 3:40PM 0.01 | 5:36AM 0.17 | 4:07PM -0.00 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | |||||||||||||||||||||
| Sunrise | - | 7:00 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 5:51 | - | - | - | - | - | - | - | 5:51 | - | - | - | - | - | - | - | 5:52 | - | - | - |
 |  | | | | | | |  | | | | | | | |  | |  | |  |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | 1 | - | - | 1 |
| Temp. °C | 22 | 22 | 24 | 24 | 24 | 23 | 22 | 22 | 23 | 23 | 25 | 26 | 25 | 24 | 24 | 24 | 23 | 23 | 25 | 26 | 25 | 24 | 24 | 24 |
| Feels °C (?) | 22 | 23 | 25 | 25 | 26 | 24 | 23 | 23 | 24 | 23 | 23 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 26 | 26 | 26 | 26 | 26 | 26 |
- 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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