Hawaii County Surf Forecast for September 17, 2025
Forecast for Big Island Windward and Southeast
| Shores | Today | Thursday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| AM | PM | AM | PM | |
| North Facing | 0-2 | 0-2 | 2-4 | 2-4 |
| East Facing | 3-5 | 3-5 | 3-5 | 3-5 |
| South Facing | 3-5 | 3-5 | 3-5 | 3-5 |
| Weather | Partly sunny. Numerous showers. | ||||
|---|---|---|---|---|---|
| High Temperature | In the mid 80s. | ||||
| Winds | Northwest winds around 5 mph, becoming east in the afternoon. |
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| Sunrise | 6:08 AM HST. | ||||
| Sunset | 6:22 PM HST. | ||||
| Weather | Mostly cloudy. Scattered showers. | |||||
|---|---|---|---|---|---|---|
| Low Temperature | In the lower 70s. | |||||
| Winds | East winds around 10 mph, becoming west after midnight. |
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| Weather | Partly sunny. Isolated showers. | |||||
|---|---|---|---|---|---|---|
| High Temperature | In the mid 80s. | |||||
| Winds | East winds around 10 mph. | |||||
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| Sunrise | 6:08 AM HST. | |||||
| Sunset | 6:21 PM HST. | |||||
Forecast for Big Island Leeward
| Shores | Today | Thursday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| AM | PM | AM | PM | |
| West Facing | 0-2 | 0-2 | 0-2 | 0-2 |
| South Facing | 1-3 | 1-3 | 1-3 | 1-3 |
Swell Summary
Surf along south facing shores will be tiny to small over the next few days with mainly background south and southeast energy. A small to moderate, long-period, south southwest swell will build Saturday into Sunday and help boost south shore surf heights back up to near or above the September average.
Surf along north facing shores should see a small tomorrow as a short period northerly swell fills in. Moderate to locally strong trades near and upstream of the area will lead to slightly elevated and choppy conditions along east facing shores through this weekend.
NORTH EAST
am 
pm 
Surf: Chest to shoulder high N short period wind swell for the morning going more NNE and building into the chest to head range in the afternoon.
Conditions: Bumpy/choppy with NNE winds 15-20mph in the morning shifting NNW for the afternoon.
NORTH WEST
am 
pm
Surf: Waist to chest high N short period wind swell.
Conditions: Choppy/disorganized with NNE winds 10-15mph in the morning increasing to 20-25mph in the afternoon.
WEST
am 
pm 
Surf: Knee high NW short period wind swell in the morning with occasional thigh high sets. This drops a bit in the afternoon.
Conditions: Glassy in the morning with ESE winds less than 5mph. Semi glassy conditions for the afternoon with the winds shifting to the SSE.
SOUTH EAST
am 
pm 
Surf: Knee high ENE short period wind swell in the morning builds in the afternoon with occasional sets up to waist high.
Conditions: Sideshore/choppy with NNE winds 15-20mph in the morning shifting N 20-25mph in the afternoon.
Data Courtesy of NOAA.gov and SwellInfo.com
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