Hawaii County Surf Forecast for May 21, 2025
Forecast for Big Island Windward and Southeast
| Shores | Tonight | Wednesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| North Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| East Facing | 2-4 | 2-4 | 2-4 | 2-4 |
| South Facing | 2-4 | 2-4 | 2-4 | 2-4 |
| Weather | Partly cloudy until 12 AM, then mostly cloudy. Scattered showers. |
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|---|---|---|---|---|---|---|
| Low Temperature | In the upper 60s. | |||||
| Winds | Northeast winds 5 to 10 mph, becoming northwest after midnight. |
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| Weather | Partly sunny. Scattered showers. | |||||
|---|---|---|---|---|---|---|
| High Temperature | In the lower 80s. | |||||
| Winds | Northeast winds around 10 mph. | |||||
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| Sunrise | 5:42 AM HST. | |||||
| Sunset | 6:51 PM HST. | |||||
Forecast for Big Island Leeward
| Shores | Tonight | Wednesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| PM | AM | AM | PM | |
| West Facing | 0-2 | 0-2 | 0-2 | 0-2 |
| South Facing | 2-4 | 2-4 | 2-4 | 2-4 |
| Weather | Mostly cloudy until 12 AM, then partly cloudy. Hazy. Showers likely. |
|---|---|
| Low Temperature | Around 70. |
| Winds | West winds around 5 mph, becoming east after midnight. |
Swell Summary
Surf along south facing shores will remain just below seasonal average through Thursday. A small, long period, south southwest swell will filter into the area late Thursday and bring surf near the summer average along south facing shores through this weekend. Surf will then slowly decline Sunday through early next week.
East shore surf will remain near seasonal average during the next couple of days. A gradual decline in east shore surf is expected during the weekend and early next week.
Tiny surf will prevail along north facing shores this week and into the weekend.
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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