Hawaii County Surf Forecast for October 18, 2025
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Saturday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 5-7 | 4-6 | 4-6 | 3-5 |
| East Facing | 3-5 | 4-6 | 4-6 | 4-6 |
| South Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| Weather | Cloudy. Occasional showers. | |||||
|---|---|---|---|---|---|---|
| Low Temperature | In the lower 70s. | |||||
| Winds | Northeast winds 5 to 10 mph, becoming north after midnight. |
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| Weather | Mostly cloudy. Showers likely. | |||||
|---|---|---|---|---|---|---|
| High Temperature | In the mid 80s. | |||||
| Winds | Northeast winds 5 to 10 mph. | |||||
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| Sunrise | 6:16 AM HST. | |||||
| Sunset | 5:55 PM HST. | |||||
Forecast for Big Island Leeward
| Shores | Tonight | Saturday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 3-5 | 2-4 | 2-4 | 2-4 |
| South Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| Weather | Partly sunny. Isolated showers. |
|---|---|
| High Temperature | In the mid 80s. |
| Winds | Light and variable winds, becoming west around 5 mph in the afternoon. |
| Sunrise | 6:20 AM HST. |
| Sunset | 5:59 PM HST. |
Swell Summary
Two moderate, long-period NW and NNW swells moving through the waters will keep surf heights elevated along N and W facing shores through Saturday. Surf along N and W facing shores will slowly trend down on Sunday. A hurricane force low E of Japan will bring another round of moderate, long-period NW (330 deg) swell into the islands towards the middle of next week building surf heights along N and W facing shores. This next long-period swell may possibly reach low-end High Surf Advisory levels Wednesday into Thursday.
A series of small, medium- to long-period S to SW swells will continue to filter into the area through the weekend keeping surf along S facing shores from going flat. Short-period surf along E facing shores increases slightly on Saturday due to the stronger trades, then trends down slightly Sunday through early next week.
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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