August 12, 2018 Surf Forecast

August 12, 2018, 5:00 AM HST (Updated August 12, 2018, 5:00 AM)

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Photo: James Grenz

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Swell Summary

Outlook through Sunday August 19: The south swell will gradually lower today and fade out by later Monday. A mix of small long-period east swells and trade wind energy will keep the surf up along east facing shores through early this week. A very small long-period northwest swell will be possible late Wednesday and a small south swell is possible Thursday. Otherwise, no significant swells are expected.
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: Waist to stomach high ESE wind swell with occasional chest high sets.


Conditions: Choppy/sideshore current with SE winds 15-20mph.

North West

am        pm  

Surf: Knee high W medium period swell.

Conditions: Light sideshore texture in the morning with ENE winds 5-10mph. Choppy/disorganized conditions for the afternoon with the winds shifting WSW 10-15mph.


am        pm  

Surf: Knee high S ground swell for the morning with occasional waist high sets. The swell builds in the afternoon with sets up to stomach high.

Conditions: Glassy in the early morning with SW winds less than 5mph. Bumpy/semi bumpy conditions move in during the morning hours with the winds shifting SSW 5-10mph.

South East

am        pm  

Surf: Waist to chest high ESE wind swell.

Conditions: Fairly clean in the early morning with N winds 5-10mph. Sideshore texture/chop conditions move in during the morning hours with the winds shifting NE.

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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