Hawaii County Surf Forecast for August 20, 2025
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Wednesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 0-2 | 0-2 | 0-2 | 0-2 |
| East Facing | 2-4 | 2-4 | 2-4 | 2-4 |
| South Facing | 2-4 | 2-4 | 2-4 | 3-5 |
| Weather | Mostly sunny until 6 PM, then mostly cloudy. Numerous showers. |
|||||
|---|---|---|---|---|---|---|
| Low Temperature | In the lower 70s. | |||||
| Winds | Northeast winds 5 to 10 mph. | |||||
|
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| Weather | Mostly sunny. Scattered showers. | |||||
|---|---|---|---|---|---|---|
| High Temperature | In the mid 80s. | |||||
| Winds | Northeast winds around 10 mph. | |||||
|
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| Sunrise | 6:02 AM HST. | |||||
| Sunset | 6:45 PM HST. | |||||
Forecast for Big Island Leeward
| Shores | Tonight | Wednesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 0-2 | 0-2 | 0-2 | 1-3 |
| South Facing | 2-4 | 2-4 | 2-4 | 3-5 |
| Weather | Mostly sunny until 6 PM, then mostly cloudy. Scattered showers. |
|---|---|
| Low Temperature | In the lower 70s. |
| Winds | Southwest winds around 5 mph, becoming south. |
| Weather | Mostly sunny. Scattered showers. |
|---|---|
| High Temperature | In the upper 80s. |
| Winds | Southeast winds around 5 mph, becoming west in the afternoon. |
| Sunrise | 6:06 AM HST. |
| Sunset | 6:49 PM HST. |
Swell Summary
A series of small, medium period south (170-190 degree) swells are expected throughout the week with surf around the summer average expected late Wednesday through around Saturday. Surf heights should decrease Sunday into early next week as these swells fade. Choppy conditions will continue for east-facing shores through the forecast period due to the persistent fresh trades. Surf along north facing shores will remain nearly flat through 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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