Hawaii County Surf Forecast for October 18, 2026
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Sunday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 4-6 | 4-6 | 3-5 | 3-5 |
| East Facing | 3-5 | 3-5 | 3-5 | 3-5 |
| South Facing | 3-5 | 3-5 | 3-5 | 3-5 |
| Weather | Mostly sunny until 6 PM, then mostly cloudy. Numerous showers. |
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|---|---|---|---|---|---|
| Low Temperature | In the lower 70s. | ||||
| Winds | Northeast winds 5 to 10 mph. | ||||
|
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| Weather | Partly sunny. Scattered showers. | ||||
|---|---|---|---|---|---|
| High Temperature | In the lower 80s. | ||||
| Winds | Northeast winds around 10 mph. | ||||
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| Sunrise | 6:16 AM HST. | ||||
| Sunset | 5:55 PM HST. | ||||
Forecast for Big Island Leeward
| Shores | Tonight | Sunday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| South Facing | 2-4 | 2-4 | 2-4 | 2-4 |
Swell Summary
A mix of short period NNW swell which peaked at the outer buoys early this morning, and declining mid- long period swell (12 to 16 seconds) will keep small surf in place through tomorrow. Both of these swells drop off by Monday, allowing surf to drop to tiny levels through much of the week before a small northwest arrives towards the end of the week.
A mid to long period south-southwest swell (15 seconds) will keep above average surf in place tonight over south shores, then decline tomorrow and remain small through much of the week with background south swells. A small long period swell is possible next weekend.
Rough trade wind swell will produce above average surf for E shores through Tuesday before declining with weakening trades mid- week. Expect some wrap of NNW swell for exposed shorelines through tonight.
NORTH EAST
NORTH WEST
WEST
SOUTH EAST
Data Courtesy of NOAA.gov and SwellInfo.com
