Hawaii County Surf Forecast for April 18, 2025
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Friday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 7-10 | 7-10 | 6-8 | 4-6 |
| East Facing | 2-4 | 2-4 | 2-4 | 2-4 |
| South Facing | 1-3 | 1-3 | 1-3 | 2-4 |
| Weather | Mostly cloudy. Numerous showers and a slight chance of thunderstorms. |
||||||
|---|---|---|---|---|---|---|---|
| Low Temperature | In the upper 60s. | ||||||
| Winds | Southeast winds 5 to 10 mph. | ||||||
|
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| Weather | Partly sunny. Numerous showers and a slight chance of thunderstorms. |
||||
|---|---|---|---|---|---|
| High Temperature | In the mid 80s. | ||||
| Winds | Southeast winds 5 to 10 mph. | ||||
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| Sunrise | 6:00 AM HST. | ||||
| Sunset | 6:39 PM HST. | ||||
Forecast for Big Island Leeward
| Shores | Tonight | Friday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 2-4 | 2-4 | 2-4 | 1-3 |
| South Facing | 1-3 | 1-3 | 1-3 | 2-4 |
| Weather | Mostly cloudy. Scattered showers and a slight chance of thunderstorms. |
|---|---|
| Low Temperature | In the upper 60s. |
| Winds | Northwest winds 5 to 10 mph in the evening, becoming light and variable. |
Swell Summary
A fresh north northwest swell will quickly build down the island chaing this evening. Recent reports from offshore buoys indicate the swell will come in two to three feet above model guidance. Surf heights along exposed north and west facing shores are now expected to peak just above advisory criteria during the overnight hours. A High Surf Advisory has been issued for north and west facing shores of Niihau, Kauai, Oahu, and Molokai and also north facing shores of Maui. On Friday, the swell will begin to gradually fade and veer to the north. No further large north or northwest swells are anticipated over the weekend or in the coming week.
Surf along east facing shores will remain below the April average through at least Saturday, then steadily rise to around average by early next week.
Surf along south facing shores will remain small, with mainly overlapping background south swells moving through. A larger pulse of south-southwest swell may arrive Tuesday.
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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