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Surf Forecasts:
Kahalu'u surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 1 am Wednesday 15 Oct 2025 HST
How big are the waves at Kahalu'u today?
The current surf forecast for Kahalu'u at 7AM is: 0.6m 14s primary swell from a Northwest direction and 0.4m 12s secondary swell from a South direction (forecast issued at 01:00am October 15). The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Oct) | 2ft (0.6m) | 13s |
| Afternoon (15 Oct) | 2ft (0.6m) | 13s |
| Evening (15 Oct) | 1.5ft (0.5m) | 12s |
Table - waves today at Kahalu'u. (Swell directed towards the surf break)
Wednesday 15 | Thursday 16 | Friday 17 | ||||||||||||||||||||||
| 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) (?) | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 14 | 18 | 14 | 18 | 15 | 17 | 14 | 13 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 211 | 208 | 197 | 142 | 140 | 114 | 113 | 77 | 56 | 79 | 81 | 79 | 71 | 108 | 89 | 87 | 66 | 66 | 100 | 66 | 66 | 66 | 63 | 61 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | on | cross- on | on | on | cross- on | cross | glass | cross- on | cross- on | glass | cross- off | cross- on | on | glass | cross- off | cross- off | cross- on | cross- on | cross- on | cross- on | cross | on | cross- on |
High Tide / height (m) | 12:18AM 0.34 | 11:56AM 0.68 | 1:05AM 0.43 | 12:44PM 0.66 | 1:41AM 0.51 | 1:22PM 0.64 | ||||||||||||||||||
Low Tide / height (m) | 4:47AM 0.24 | 7:10PM 0.13 | 6:11AM 0.23 | 7:33PM 0.11 | 7:13AM 0.21 | 7:54PM 0.09 | ||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:18 | - | - | - | - | - | - | - | 6:18 | - | - | - | - | - | - | - | 6:18 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:00 | - | - | - | - | - | - | - | 6:00 | - | - | - | - | - | - | - | 5:59 | - |
 |  | |  | |  | | | | | | | | | | |  | | |  |  | | | | |
Rain (mm) | - | 1 | - | 1 | 1 | - | 1 | 1 | 1 | 1 | - | - | - | - | 1 | 1 | - | - | 1 | - | - | 1 | 2 | 1 |
| Temp. °C | 25 | 25 | 25 | 25 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 26 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 25 |
| Feels °C (?) | 29 | 28 | 28 | 28 | 30 | 29 | 28 | 28 | 27 | 28 | 28 | 29 | 29 | 28 | 29 | 27 | 27 | 28 | 27 | 29 | 29 | 28 | 29 | 27 |
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Recent Eyeball Surf Reports for HAW - Big Island
Continuing clean conditions at Kahalu'u (calm at Kailua Kona 3 km from Kahalu'u). 0.8m 14s groundswell from the WNW with a 0.3m 11s groundswell from the S. 2 swells combining to make bigger set waves.
1 h 17 min ago
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