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Surf Forecasts:
Shacks surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 7 pm Monday 20 Apr 2026 HSTForecast update in hr min s Forecast update imminent
Shacks surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Shacks sea temperature is
25.0° C
(Which is slightly warmer than usual)How big are the waves at Shacks today?
The current surf forecast for Shacks at 11PM is: 1.0m 8s primary swell from a East direction (forecast issued at 07:00pm April 20). An open ocean swell of 0.4m 6s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Apr) | - | - |
| Afternoon (20 Apr) | 3.5ft (1.1m) | 7s |
| Evening (20 Apr) | 3.5ft (1.0m) | 8s |
Table - waves today at Shacks. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||||||
| 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 | 8 AM | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 112 | 118 | 121 | 121 | 130 | 133 | 137 | 137 | 133 | 94 | 133 | 110 | 113 | 92 | 92 | 92 | 94 | 70 | 70 | 87 | 87 | 85 | 81 | 79 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | on | on | cross- on | on | on | on | cross- on | cross- on | on | on | on | cross- on | cross- on | cross- on | cross | cross | cross | cross | cross | cross | cross |
High Tide / height (m) | 5:12AM 0.49 | 7:06PM 0.95 | 6:10AM 0.43 | 8:21PM 0.90 | 8:14AM 0.39 | |||||||||||||||||||
Low Tide / height (m) | 1:04AM 0.35 | 11:20AM 0.09 | 2:40AM 0.37 | 12:13PM 0.17 | 4:27AM 0.34 | 1:33PM 0.26 | ||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 5:56 | - | - | - | - | - | - | - | 5:56 | - | - | - | - | - | - | - | 5:56 | - | - |
| Sunset | 6:37 | - | - | - | - | - | - | - | 6:37 | - | - | - | - | - | - | - | 6:38 | - | - | - | - | - | - | - |
 |  |  | | | | | | | | | | | | | | | | |  |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - |
| Temp. °C | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 |
| Feels °C (?) | 25 | 26 | 27 | 25 | 26 | 26 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 24 | 24 | 24 | 24 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Shacks surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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