Hawaii County Surf Forecast for September 21, 2021
Photo Credit: James Grenz
Forecast for Big Island Leeward
| Shores | Today | Wednesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| AM | PM | AM | PM | |
| West Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| South Facing | 2-4 | 2-4 | 2-4 | 2-4 |
| Weather | Mostly cloudy until 12 AM, then partly cloudy. Scattered showers. |
|---|---|
| Low Temperature | In the lower 70s. |
| Winds | South winds around 5 mph in the evening, becoming light and variable. |
| Weather | Mostly sunny. Isolated showers. |
|---|---|
| High Temperature | In the mid 80s. |
| Winds | South winds around 5 mph, becoming west in the afternoon. |
| Sunrise | 6:13 AM HST. |
| Sunset | 6:20 PM HST. |
Swell Summary
Surf along exposed north and west facing shores will trend up today as a new, north-northwest swell arrives and builds down the island chain. This swell will peak tonight, then slowly lower Wednesday through Thursday. A larger north-northwest swell arriving Thursday night may near the advisory level Friday through Friday night as it peaks. This swell will gradually ease over the weekend. Surf along south facing shores will rise by Wednesday as a long-period south swell arrives and moves through. Surf associated with this swell should peak around Thursday before fading into the weekend. Surf along east facing shores will remain small and choppy each day due to the local trade winds.
NORTH EAST
am 
pm
Surf: Knee to waist high E short period wind swell.
Conditions: Choppy/disorganized with ESE winds 15-20mph.
NORTH WEST
am 
pm 
Surf: Minimal (ankle high or less) surf.
Conditions: Glassy in the morning with SW winds less than 5mph. Semi choppy conditions for the afternoon with the winds shifting WSW 10-15mph.
WEST
am 
pm
Surf: Minimal (ankle high or less) surf.
Conditions: Semi glassy in the morning with SE winds less than 5mph. Bumpy/semi bumpy conditions for the afternoon with the winds shifting WNW 5-10mph. Glassy conditions are expected for the late day with ESE winds less than 5mph.
SOUTH EAST
am pm
Surf: Knee to waist high E short period wind swell.
Conditions: Choppy/disorganized with ENE winds 10-15mph.
Data Courtesy of NOAA.gov and SwellInfo.com
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