Hawaii County Surf Forecast for October 21, 2026
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Wednesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| East Facing | 4-6 | 4-6 | 3-5 | 3-5 |
| South Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| Weather | Mostly cloudy. Scattered showers. | ||||||
|---|---|---|---|---|---|---|---|
| Low Temperature | In the lower 70s. | ||||||
| Winds | Northeast winds 5 to 10 mph. | ||||||
|
|||||||
| Weather | Mostly sunny. Isolated showers. | ||||
|---|---|---|---|---|---|
| High Temperature | In the lower 80s. | ||||
| Winds | East winds 5 to 10 mph. | ||||
|
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| Sunrise | 6:17 AM HST. | ||||
| Sunset | 5:53 PM HST. | ||||
Forecast for Big Island Leeward
| Shores | Tonight | Wednesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| South Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| Weather | Partly sunny until 6 PM, then partly cloudy. Scattered showers. |
|---|---|
| Low Temperature | In the lower 70s. |
| Winds | West winds around 5 mph, becoming northeast after midnight. |
Swell Summary
Small surf for north facing shores is expected through tomorrow before a small northwest swell arrives giving a small bump Thursday afternoon and Friday. This will then be followed by a slightly larger mid period north- northwest swell this weekend. A potential storm force low in the process of developing north of Japan could send a larger long period west- northwest swell early next week. This swell is still uncertain and will depend on the evolution of the developing low.
Small background south swells will keep relatively small surf for south facing shores through much of the week. A moderate south- southwest swell is expected this weekend, and could bring surf heights above seasonal averages.
Rough trade wind swell will gradually decline later tomorrow morning as trade winds decrease, leading to smaller surf through the remainder of the week. A small medium period east swell is possible Thursday into the weekend.
NORTH EAST
NORTH WEST
WEST
SOUTH EAST
Data Courtesy of NOAA.gov and SwellInfo.com
