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Surf Forecasts:
Kahuku Ranch surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 7 pm Saturday 21 Mar 2026 HSTForecast update in hr min s Forecast update imminent
Kahuku Ranch surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kahuku Ranch sea temperature is
24.8° C
(Which is normal for this time of year)How big are the waves at Kahuku Ranch today?
The current surf forecast for Kahuku Ranch at 2AM is: 0.5m 17s primary swell from a South direction and 0.5m 12s secondary swell from a West-northwest direction (forecast issued at 07:00pm March 21). An open ocean swell of 0.7m 8s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Mar) | 1.5ft (0.5m) | 16s |
| Afternoon (22 Mar) | 1.5ft (0.5m) | 16s |
| Evening (22 Mar) | 2.5ft (0.8m) | 14s |
Table - waves today at Kahuku Ranch. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | |||||||||||||||||||||
| 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) (?) | 12 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 81 | 170 | 162 | 153 | 159 | 151 | 144 | 140 | 191 | 236 | 236 | 180 | 173 | 161 | 118 | 116 | 114 | 114 | 82 | 79 | 58 | 37 | 37 | 36 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | on | on | cross | cross- on | cross- off | cross- off | cross- on | cross- on | glass | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 5:25AM 0.61 | 6:36PM 0.91 | 6:00AM 0.52 | 7:37PM 0.86 | 6:42AM 0.43 | |||||||||||||||||||
Low Tide / height (m) | 12:10AM 0.23 | 11:32AM 0.04 | 1:13AM 0.30 | 12:08PM 0.08 | 2:44AM 0.35 | 12:55PM 0.14 | ||||||||||||||||||
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:24 | - | - | - | - | - | - | - | 6:24 | - | - | - | - | - | - | - | 6:22 | - | - |
| Sunset | 6:34 | - | - | - | - | - | - | - | 6:34 | - | - | - | - | - | - | - | 6:34 | - | - | - | - | - | - | - |
 |  | |  | |  |  | |  |  | | | | | | | | |  | | |  | | | |
Rain (mm) | - | 1 | 2 | - | 1 | 1 | - | 3 | 4 | 4 | 4 | 2 | 1 | - | 2 | 4 | 4 | 1 | - | - | - | - | - | - |
| Temp. °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 23 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 23 | 24 | 24 |
| Feels °C (?) | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 24 | 25 | 23 | 23 | 21 | 22 | 24 | 24 | 22 | 20 | 22 | 22 | 22 | 22 | 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 Kahuku Ranch 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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