Hawaii County Surf Forecast for March 22, 2021
Forecast for South Big Island and Big Island North and East
HIGH SURF ADVISORY FOR EAST FACING SHORES
| Shores | Today | Tuesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| AM | PM | AM | PM | |
| North Facing | 7-9 | 6-8 | 4-6 | 4-6 |
| East Facing | 7-10 | 6-8 | 4-6 | 4-6 |
| South Facing | 2-4 | 2-4 | 2-4 | 2-4 |
| Weather | Partly sunny. Showers likely and a slight chance of thunderstorms. |
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|---|---|---|---|---|---|---|---|
| High Temperature | Around 80. | ||||||
| Winds | South winds around 5 mph, becoming east in the afternoon. |
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| Sunrise | 6:22 AM HST. | ||||||
| Sunset | 6:32 PM HST. | ||||||
| Weather | Mostly cloudy. Scattered showers. | ||||
|---|---|---|---|---|---|
| Low Temperature | In the mid 60s. | ||||
| Winds | Southeast winds around 5 mph. | ||||
|
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| Weather | Partly sunny. Scattered showers and a slight chance of thunderstorms. |
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|---|---|---|---|---|---|---|---|
| High Temperature | In the lower 80s. | ||||||
| Winds | Southeast winds 5 to 10 mph. | ||||||
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| Sunrise | 6:21 AM HST. | ||||||
| Sunset | 6:32 PM HST. | ||||||
Forecast for Big Island Leeward
| Shores | Today | Tuesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| AM | PM | AM | PM | |
| West Facing | 2-4 | 2-4 | 2-4 | 2-4 |
| South Facing | 2-4 | 2-4 | 2-4 | 2-4 |
| Weather | Mostly sunny. Scattered showers and a slight chance of thunderstorms. |
|---|---|
| High Temperature | In the lower 80s. |
| Winds | Northeast winds around 5 mph, becoming west in the afternoon. |
| Sunrise | 6:26 AM HST. |
| Sunset | 6:36 PM HST. |
| Weather | Partly sunny. Scattered showers and a slight chance of thunderstorms. |
|---|---|
| High Temperature | In the lower 80s. |
| Winds | Light and variable winds, becoming west around 5 mph in the afternoon. |
| Sunrise | 6:25 AM HST. |
| Sunset | 6:36 PM HST. |
Swell Summary
The far northeast high is still generating a strong trade fetch upstream of the islands. Thus, while the short period east trade wind swell is peaking today it will slowly subside through the week. East-facing shoreline surf will begin to lower through the day in direct response to weakening trades that will transition to light southerlies over the area with the approach of a cold front northwest of the state. The High Surf Advisory (HSA) for the eastern shores of Kauai, Oahu, Molokai, Maui and Big Island is in effect until 6 PM HST this evening due to the delayed lowering of surf along these eastern exposures.
The small north northeast swell that filled in this past weekend will diminish tonight through Tuesday. A couple of small, short period northwest swells will move around the islands through Tuesday. A small, compact low approximately 500 nm south of the Aleutian Islands this morning will send the next appreciable northwest swell our way. This northwest swell is scheduled to arrive in the northwest waters during the day Tuesday and then build down the chain through Thursday. During the peak of the swell surf heights along north and west-facing shores may reach low end HSA thresholds Wednesday night through Thursday. This northwest swell will gradually decline Friday and Saturday. A series of storms south of New Zealand have been sending pulses of long period swell energy toward the local waters. These very small, long period south swells could arrive as early as Tuesday night and provide a small boost to mid to late week south shore surf.
NORTH EAST
am 
pm 
Surf: Waist to chest high ENE short period wind swell.
Conditions: Fairly clean in the morning with S winds 5-10mph. Sideshore texture/chop conditions for the afternoon with the winds shifting SE 10-15mph.
NORTH WEST
am 
pm 
Surf: Minimal (ankle high or less) surf.
Conditions: Semi glassy in the morning with SSW winds less than 5mph. Sideshore texture/chop conditions for the afternoon with the winds shifting SW 10-15mph.
WEST
am 
pm
Surf: Minimal (ankle high or less) surf.
Conditions: Glassy in the morning with ESE winds less than 5mph. Semi glassy/semi bumpy conditions for the afternoon with the winds shifting SW 5-10mph.
SOUTH EAST
am 
pm
Surf: Waist to chest high E short period wind swell.
Conditions: Light sideshore texture in the morning with NNE winds 5-10mph. Bumpy/semi bumpy conditions for the afternoon with the winds shifting E 10-15mph.
Data Courtesy of NOAA.gov and SwellInfo.com
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