Hawaii County Surf Forecast for July 20, 2026
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Monday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 0-2 | 0-2 | 0-2 | 0-2 |
| East Facing | 3-5 | 3-5 | 2-4 | 2-4 |
| South Facing | 4-6 | 6-8 | 6-8 | 7-10 |
| Weather | Mostly cloudy. Showers. | ||||||
|---|---|---|---|---|---|---|---|
| Low Temperature | In the lower 70s. | ||||||
| Winds | Northeast winds 5 to 10 mph, becoming northwest after midnight. |
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| Weather | Mostly cloudy. Numerous showers. | |||||
|---|---|---|---|---|---|---|
| High Temperature | In the mid 80s. | |||||
| Winds | Northwest winds around 5 mph, becoming northeast in the afternoon. |
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| Sunrise | 5:52 AM HST. | |||||
| Sunset | 7:01 PM HST. | |||||
Forecast for Big Island Leeward
| Shores | Tonight | Monday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 2-4 | 4-6 | 4-6 | 5-7 |
| South Facing | 4-6 | 6-8 | 6-8 | 7-10 |
| Weather | Mostly cloudy. Isolated showers. |
|---|---|
| Low Temperature | In the lower 70s. |
| Winds | Southwest winds 5 to 10 mph, becoming north. |
Swell Summary
A south swell is expected to build tonight, then peak around the advisory level Monday night into early Wednesday. A High Surf Advisory will likely be required through this period. As this swell slowly fades during the middle of the week, a new long period south swell will arrive on Thursday, keeping surf elevated through next weekend.
Surf along north-facing shores will remain at flat to tiny levels through next weekend.
Surf along east facing shores will lower slightly Monday through Wednesday as the trades ease upstream of the islands. East shore surf should then build back close to seasonal levels late in the week through next weekend. Additionally, swell from Tropical Storm Elida may give a slight boost to east shore surf during the middle of the week.
NORTH EAST
am 
pm
Surf: Minimal (ankle high or less) surf.
Conditions: Semi choppy with ESE winds 5-10mph in the morning increasing to 10-15mph in the afternoon.
NORTH WEST
am 
pm
Surf: Minimal (ankle high or less) surf.
Conditions: Clean in the morning with ESE winds less than 5mph. Bumpy/semi bumpy conditions for the afternoon with the winds shifting W 5-10mph.
WEST
am 
pm
Surf: Minimal (ankle high or less) surf.
Conditions: Light sideshore texture in the morning with NNW winds 5-10mph. Bumpy/semi bumpy conditions for the afternoon with the winds shifting to the WNW.
SOUTH EAST
am pm
Surf: Minimal (ankle high or less) surf.
Conditions: Sideshore texture/chop with NE winds 10-15mph.
Data Courtesy of NOAA.gov and SwellInfo.com
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