Hawaii County Surf Forecast for September 12, 2025
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Friday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 3-5 | 3-5 | 3-5 | 3-5 |
| East Facing | 3-5 | 3-5 | 3-5 | 3-5 |
| South Facing | 2-4 | 2-4 | 3-5 | 3-5 |
| Weather | Mostly cloudy. Numerous showers. | |||||
|---|---|---|---|---|---|---|
| Low Temperature | In the lower 70s. | |||||
| Winds | East winds 5 to 10 mph. | |||||
|
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| Weather | Mostly cloudy until 12 PM, then mostly sunny. Numerous showers. |
||||||
|---|---|---|---|---|---|---|---|
| High Temperature | In the mid 80s. | ||||||
| Winds | East winds 5 to 10 mph. | ||||||
|
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| Sunrise | 6:07 AM HST. | ||||||
| Sunset | 6:27 PM HST. | ||||||
Forecast for Big Island Leeward
| Shores | Tonight | Friday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 2-4 | 2-4 | 3-5 | 3-5 |
| South Facing | 2-4 | 2-4 | 3-5 | 3-5 |
| Weather | Mostly cloudy until 12 AM, then partly cloudy. Scattered showers. |
|---|---|
| Low Temperature | In the lower 70s. |
| Winds | West winds around 5 mph, becoming northeast after midnight. |
| Weather | Mostly sunny. Isolated showers. |
|---|---|
| High Temperature | In the upper 80s. |
| Winds | Light and variable winds, becoming west around 5 mph in the afternoon. |
| Sunrise | 6:11 AM HST. |
| Sunset | 6:31 PM HST. |
Swell Summary
Despite the current south swell slowly declining today, another small, medium to long period south swell will fill in on Friday to provide another slight bump in south shore surf. This swell will then then slowly decline over the weekend. Additionally, surf along north facing shores will remain slightly elevated over the next couple of days as another small northwest pulse arrives on Friday. East facing shores will see typical trade wind generated energy throughout the forecast period.
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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