April 20, 2018 Surf Forecast
Photo: James Grenz
Swell Summary
Outlook through Thursday April 26: Rough, moderate surf will persist along east facing shores through this weekend. Strengthening trades will likely cause surf to reach the High Surf Advisory criteria along east facing shores early next week. The current northwest swell will peak Friday, and then slowly lower this weekend. A moderate reinforcing northwest swell arriving late Sunday is expected to peak Monday, then gradually decline Tuesday and Wednesday. Small south swells will maintain modest surf along south facing shores through early next week.
Surf heights are forecast heights of the face, or front, of waves. The surf forecast is based on the significant wave height, the average height of the one third largest waves, at the locations of the largest breakers. Some waves may be more than twice as high as the significant wave height. Expect to encounter rip currents in or near any surf zone.
North East
am 
pm 
Surf: Stomach to shoulder high mix of E wind swell and NNW long period swell
Conditions: Clean in the morning with SSW winds less than 5mph. Sideshore texture/chop conditions for the afternoon with the winds shifting SE 10-15mph.
North West
am 
pm
Surf: Ankle to knee high SSW ground swell.
Conditions: Semi clean/textured in the morning with ENE winds 15-20mph. Light sideshore texture conditions for the afternoon with the winds shifting SSW 5-10mph.
West
am 
pm
Surf: Knee to thigh high NW medium period swell.
Conditions: Light sideshore texture in the morning with SSE winds 5-10mph. Semi glassy/semi bumpy conditions for the afternoon with the winds shifting SSW less than 5mph.
South East
am pm
Surf: Stomach to shoulder high E wind swell.
Conditions: Clean in the morning with NNW winds 5-10mph. Fairly clean conditions for the afternoon with the winds shifting to the N.
Image: NOAA
Image: NOAA
Image: NOAA
Image: NOAA
Image: NOAA
Image: NOAA
**Click directly on the images below to make them larger. Charts include: Hawaii County projected winds, tides, swell direction & period and expected wave heights.**
Data Courtesy of NOAA.gov and SwellInfo.com
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