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:
Waipio Valley surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 1 am Tuesday 16 Dec 2025 HSTForecast update in hr min s Forecast update imminent
Waipio Valley surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Waipio Valley sea temperature is
25.8° C
(Which is slightly warmer than usual)How big are the waves at Waipio Valley today?
The current surf forecast for Waipio Valley at 3AM is: 1.5m 14s primary swell from a North direction (forecast issued at 01:00am December 16). An open ocean swell of 0.8m 5s is not directed at the surf break, a second open ocean swell of 1.1m 5s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 3.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 4.5ft (1.4m) | 13s |
| Afternoon (16 Dec) | 4.5ft (1.4m) | 13s |
| Evening (16 Dec) | 3.5ft (1.1m) | 12s |
Table - waves today at Waipio Valley. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| 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) (?) | 13 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 14 | 14 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 694 | 869 | 881 | 694 | 673 | 653 | 513 | 344 | 350 | 663 | 599 | 599 | 495 | 488 | 407 | 336 | 331 | 260 | 244 | 239 | 330 | 419 | 586 | 670 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | glass | cross- on | glass | glass | glass | cross- off | glass | glass | glass | cross- on | cross- on | glass | glass | glass | glass | glass | glass | on | glass | glass | glass |
High Tide / height (m) | 1:36AM 0.85 | 12:03PM 0.48 | 2:05AM 0.90 | 12:47PM 0.47 | 2:36AM 0.94 | 1:25PM 0.47 | ||||||||||||||||||
Low Tide / height (m) | 8:23AM 0.40 | 6:29PM 0.10 | 8:58AM 0.37 | 7:03PM 0.07 | 9:29AM 0.35 | 7:36PM 0.04 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:50 | - | - | - | - | - | - | - | 6:50 | - | - | - | - | - | - | - | 6:50 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 5:45 | - | - | - | - | - | - | - | 5:45 | - | - | - | - | - | - | - | 5:45 | - |
 | | |  | | |  |  | |  | |  | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 24 | 24 | 25 | 25 | 27 | 27 | 25 | 25 | 25 | 24 | 24 | 24 | 26 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 26 | 25 | 25 | 25 |
| Feels °C (?) | 28 | 27 | 28 | 28 | 29 | 30 | 29 | 29 | 28 | 28 | 28 | 27 | 29 | 28 | 29 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 29 |
- 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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