March 20, 2018 Surf Forecast

March 20, 2018, 1:00 AM HST (Updated March 20, 2018, 1:00 AM)

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Photo: James Grenz

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Swell Summary

Outlook through Monday March 26: A large northeast swell will build Tuesday night, peak late Wednesday through Wednesday night, then steadily lower through the second half of the week. Warning-level surf will be likely along east facing shores with advisory-level surf possible along north facing shores Wednesday into Thursday. Advisory-level surf will likely hold along east facing shores through Friday as the swell slowly lowers.
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: Chest to shoulder high NNE ground swell in the morning builds to chest to head high for the afternoon.


Conditions: Choppy/disorganized with ESE winds 10-15mph in the morning shifting E for the afternoon.

North West

am        pm  

Surf: Knee to thigh high NNE medium period swell.

Conditions: Light sideshore texture in the morning with NE winds 5-10mph. Bumpy/semi bumpy conditions for the afternoon with the winds shifting to the WNW.


am        pm  

Surf: Ankle to knee high NW ground swell for the morning going more S during the day.

Conditions: Glassy in the morning with WNW winds less than 5mph. Bumpy/semi bumpy conditions for the afternoon as the winds increase to 5-10mph.

South East

am        pm  

Surf: Waist to stomach high ESE wind swell with occasional chest high sets.

Conditions: Semi glassy in the morning with NE winds less than 5mph. Semi choppy conditions for the afternoon with the winds shifting ENE 5-10mph.

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 and



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