Hawaii County Surf Forecast for December 20, 2021
Photo Credit: James Grenz
Forecast for Big Island Leeward
| Shores | Today | Tuesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| AM | PM | AM | PM | |
| West Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| South Facing | 1-3 | 1-3 | 0-2 | 0-2 |
| Weather | Mostly sunny. A slight chance of thunderstorms with isolated showers. |
|---|---|
| High Temperature | In the lower 80s. |
| Winds | Southwest winds around 5 mph. |
| Sunrise | 6:54 AM HST. |
| Sunset | 5:50 PM HST. |
| Weather | Partly sunny. Scattered showers. |
|---|---|
| High Temperature | Around 80. |
| Winds | North winds around 5 mph, becoming southwest in the afternoon. |
| Sunrise | 6:54 AM HST. |
| Sunset | 5:51 PM HST. |
Swell Summary
While the fetch of trade winds to the E of the islands is somewhat limited, short- and medium-period wind waves/swells will be arriving from the NE and NNE over the day or two, due to the strong high, and the strong gradient between it and a slow-moving, gale-force low off the U.S. W coast. This will result in increased seas, with rough and choppy surf along shores exposed to the N and E. Surf along exposed E facing shores may become large enough to warrant a High Surf Advisory by tonight or Tuesday. Very little swell energy from the NW is expected this week, but a small pulse of swell will persist through today, with another pulse possible Thursday and Friday.
NORTH EAST
am 
pm
Surf: Knee to waist high NNE short period wind swell for the morning going more E during the day.
Conditions: Semi choppy with ESE winds 5-10mph in the morning shifting SE for the afternoon.
NORTH WEST
am 
pm
Surf: Minimal (ankle high or less) surf.
Conditions: Fairly clean in the morning with S winds 5-10mph. Glassy conditions for the afternoon as the winds lighten to less than 5mph.
WEST
am 
pm
Surf: Minimal (ankle high or less) surf.
Conditions: Semi glassy with SE winds 5-10mph in the morning shifting N less than 5mph in the afternoon.
SOUTH EAST
am 
pm
Surf: Knee to waist high E short period wind swell.
Conditions: Light sideshore texture with NNE winds 10-15mph.
Data Courtesy of NOAA.gov and SwellInfo.com
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