Hawaii County Surf Forecast for October 21, 2025
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Tuesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 3-5 | 3-5 | 3-5 | 4-6 |
| East Facing | 3-5 | 3-5 | 3-5 | 3-5 |
| South Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| Weather | Mostly cloudy. Numerous showers. | ||||||
|---|---|---|---|---|---|---|---|
| Low Temperature | In the lower 70s. | ||||||
| Winds | Northeast winds 5 to 10 mph, becoming north after midnight. |
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| Weather | Partly sunny. Numerous showers. | |||||
|---|---|---|---|---|---|---|
| High Temperature | In the lower 80s. | |||||
| Winds | Northeast winds around 10 mph. | |||||
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| Sunrise | 6:17 AM HST. | |||||
| Sunset | 5:53 PM HST. | |||||
Forecast for Big Island Leeward
| Shores | Tonight | Tuesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| South Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| Weather | Mostly cloudy until 12 AM, then partly cloudy. Hazy. Scattered showers. |
|---|---|
| Low Temperature | In the lower 70s. |
| Winds | West winds around 5 mph in the afternoon, becoming light and variable. |
| Weather | Mostly sunny. Hazy. Scattered showers. |
|---|---|
| High Temperature | In the mid 80s. |
| Winds | South winds around 5 mph, becoming southwest in the afternoon. |
| Sunrise | 6:21 AM HST. |
| Sunset | 5:57 PM HST. |
Swell Summary
A series of small to moderate, long-period northwest to north- northwest swells (320-340 degrees) will fill in throughout the week, keeping surf along north and west facing shores elevated. The current northwest swell (320-330 degrees) is currently declining and will be reinforced by another small long period northwest swell (330 degrees) tomorrow evening. This next swell will peak near average late Tuesday before subsiding Wednesday afternoon. A moderate, long- period swell (330-340 degrees) could produce advisory level surf for north and west facing shores late Wednesday into Thursday. Another slightly larger, moderate, long- period swell (330-340 degrees) will fill in Friday through Saturday, keeping surf elevated along north and west facing shores above advisory levels.
Background, medium- to long-period south to southwest swells will continue to filter into the area through the week, keeping surf along south facing shores from going flat. Small, choppy surf along east facing shores will increase and become rough for the latter half of the week as the trades strengthen.
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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