Hawaii County Surf Forecast for August 12, 2025
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Tuesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 1-3 | 1-3 | 0-2 | 0-2 |
| East Facing | 3-5 | 3-5 | 1-3 | 1-3 |
| South Facing | 6-8 | 6-8 | 3-5 | 2-4 |
| Weather | Mostly cloudy. Scattered showers. | ||||||
|---|---|---|---|---|---|---|---|
| Low Temperature | In the lower 70s. | ||||||
| Winds | East winds 5 to 10 mph, becoming northwest after midnight. |
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| Weather | Mostly sunny. Scattered showers. | |||||
|---|---|---|---|---|---|---|
| High Temperature | In the mid 80s. | |||||
| Winds | North winds 5 to 10 mph. | |||||
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| Sunrise | 6:00 AM HST. | |||||
| Sunset | 6:51 PM HST. | |||||
Forecast for Big Island Leeward
| Shores | Tonight | Tuesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 3-5 | 3-5 | 1-3 | 1-3 |
| South Facing | 6-8 | 6-8 | 3-5 | 2-4 |
| Weather | Mostly sunny until 6 PM, then mostly cloudy until 12 AM, then partly cloudy. Scattered showers with isolated thunderstorms. |
|---|---|
| Low Temperature | In the lower 70s. |
| Winds | Northwest winds around 5 mph in the evening, becoming light and variable. |
Swell Summary
PacIOOS buoys at Barber's Point and Kaumalapau (Lanai) indicate rather steady significant wave heights through today. However, energy in the longer periods has nonetheless begun to fall off and is indicative of surf having fallen below the advisory threshold this afternoon. The High Surf Advisory has therefore been cancelled. This swell will gradually subside through the week. S shores then get a modest bump this weekend in response to a small long period pulse emanating from the S Hemisphere. Surf along E shores remains small for the next several days as building trades remain on the lighter side. Short period chop increases this weekend as stronger trades develop. Surf along N and W shores remains tiny.
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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