Hawaii County Surf Forecast for December 17, 2021
Forecast for Big Island Leeward
| Shores | Today | Saturday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| AM | PM | AM | PM | |
| West Facing | 1-3 | 1-3 | 1-3 | 1-3 |
| South Facing | 0-2 | 0-2 | 0-2 | 0-2 |
| 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 | 6:52 AM HST. |
| Sunset | 5:49 PM HST. |
| Weather | Mostly sunny until 12 PM, then mostly cloudy. Scattered showers. |
|---|---|
| High Temperature | In the lower 80s. |
| Winds | Light and variable winds, becoming northwest around 5 mph in the afternoon. |
| Sunrise | 6:53 AM HST. |
| Sunset | 5:49 PM HST. |
Swell Summary
Two overlapping northwest swells will increase surf heights along north and west shores through Sunday. These surf heights may approach High Surf Advisory levels this weekend and then decline on Monday. A small medium period north-northeast swell arriving Monday night should keep surf heights elevated along north facing shores with some wrap into eastern shores through Wednesday. East facing surf heights will begin to rise today as trade winds begin to increase upstream of the Hawaiian Islands. Stronger trade winds this weekend will boost surf heights along east facing shores into early next week. South facing shores will remain flat through the week.
NORTH EAST
am 
pm 
Surf: Ankle high ENE short period wind swell for the morning. The swell shifts more E and builds for the afternoon with sets up to waist high.
Conditions: Choppy/sideshore current with SE winds 15-20mph in the morning shifting ESE for the afternoon.
NORTH WEST
am pm 
Surf: Minimal (ankle high or less) surf.
Conditions: Sideshore texture/chop in the morning with NE winds 5-10mph. Semi glassy/semi bumpy conditions for the afternoon with the winds shifting to the WNW. Glassy conditions are expected for the late day with SSW winds less than 5mph.
WEST
am pm 
Surf: Minimal (ankle high or less) surf.
Conditions: Glassy in the morning with SE winds less than 5mph. Semi glassy/semi bumpy conditions for the afternoon with the winds shifting to the NW.
SOUTH EAST
am pm
Surf: Minimal surf (ankle or less) for the morning with a knee to thigh high E short period wind swell filling in during the afternoon.
Conditions: Clean in the morning with NNW winds less than 5mph. Bumpy/semi bumpy conditions for the afternoon with the winds shifting E 5-10mph.
Data Courtesy of NOAA.gov and SwellInfo.com
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