Hawaii County Surf Forecast for November 20, 2023
Forecast for Big Island Windward and Southeast
| Shores | Today | Tuesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| AM | PM | AM | PM | |
| North Facing | 7-10 | 10-14 | 10-14 | 7-10 |
| East Facing | 5-7 | 6-8 | 6-8 | 6-8 |
| South Facing | 4-6 | 4-6 | 4-6 | 3-5 |
| Weather | Sunny. Isolated showers. | |||||
|---|---|---|---|---|---|---|
| High Temperature | In the mid 80s. | |||||
| Winds | Northwest winds around 5 mph, becoming northeast in the afternoon. |
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| Sunrise | 6:31 AM HST. | |||||
| Sunset | 5:40 PM HST. | |||||
| Weather | Partly cloudy until 12 AM, then mostly cloudy. Scattered showers. |
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|---|---|---|---|---|---|---|
| Low Temperature | In the upper 60s. | |||||
| Winds | Northwest winds around 5 mph. | |||||
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| Weather | Partly sunny. Scattered showers. | |||||
|---|---|---|---|---|---|---|
| High Temperature | In the lower 80s. | |||||
| Winds | Northwest winds around 5 mph, becoming northeast in the afternoon. |
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| Sunrise | 6:32 AM HST. | |||||
| Sunset | 5:40 PM HST. | |||||
Forecast for Big Island Leeward
| Shores | Today | Tuesday | ||
|---|---|---|---|---|
| Surf | Surf | |||
| AM | PM | AM | PM | |
| West Facing | 3-5 | 3-5 | 3-5 | 3-5 |
| South Facing | 3-5 | 3-5 | 3-5 | 3-5 |
Swell Summary
A large NNW swell (340 degrees) has rapidly built in overnight over the western half of the state, and a High Surf Warning (HSW) has been issued for shores most exposed to the swell, with a High Surf Advisory for shores less exposed.
While the predominant period of the primary NNW (340 degrees) swell train will be around 14 seconds, the proximity of near gale force winds over waters just NW of the area will introduce a wide spectrum of wave energy extending into the shorter periods, resulting in rough and choppy surf along exposed N facing shores. The increasing seas will require an SCA for most waters through Tuesday. The swell will transition increasingly northerly (360 degrees) as it gradually diminishes late Monday/Tuesday.
A small S swell will gradually decline over the next couple of days. A small to moderate long-period NW (320 degrees) swell is expected Wednesday night and Thursday, followed by the potential for a very large NW (320 degrees) swell by the end of the week.
Surf along E facing shores will remain rough and choppy as the trade winds build back this week. Although, E facing shores exposed to the N swell wrap will see a rise coinciding with the N swell.
NORTH EAST
am 
pm 
Surf: Small scale (ankle to knee high) surf.
Conditions: Light sideshore texture in the morning with NW winds 5-10mph. Glassy conditions for the afternoon with the winds shifting NNE less than 5mph.
NORTH WEST
am pm
Surf: Minimal (ankle high or less) surf.
Conditions: Semi glassy in the morning with ENE winds less than 5mph. Semi glassy/semi bumpy conditions for the afternoon with the winds shifting to the NW. Glassy conditions are expected by late afternoon with W winds less than 5mph.
WEST
am pm
Surf: Minimal (ankle high or less) surf.
Conditions: Semi glassy in the morning with N winds 5-10mph. Semi glassy/semi bumpy conditions for the afternoon with the winds shifting NW less than 5mph.
SOUTH EAST
am pm
Surf: Minimal (ankle high or less) surf.
Conditions: Clean in the morning with NW winds less than 5mph. Light sideshore texture conditions for the afternoon with the winds shifting NNE 5-10mph.
Data Courtesy of NOAA.gov and SwellInfo.com
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