Forecast for Big Island Leeward

Swell Summary

North facing shore surf is experiencing an upward trend with the arrival of this morning's moderate size, medium period north northeast swell. While most of the energy associated with this swell was aimed well east of the islands, enough of this energy will angularly spread into the area from the north and east and boost north and east facing shore surf through Wednesday. The more easterly source of this swell will likely result in larger surf lingering longer over more eastern islands. North shore surf heights may flirt with High Surf Advisory (HSA) levels tonight and Wednesday morning. A couple of long period northwest swells, in association with gale force lows passing across the northwestern Pacific through Tuesday, are scheduled to arrive later this week. A small, long period northwest swell will move through the area Wednesday and Thursday with a slightly larger long period northwest swell expected Friday through Sunday. East facing shore chop will remain rough through Wednesday in response to local and upstream moderate to fresh trade flow. Near HSA level east facing shore surf is a possibility through early Wednesday as, along with higher east wind waves, a northeast swell may wrap in.

NORTH EAST

am        pm  

Surf: Knee to waist high NNE short period wind swell in the morning builds in the afternoon with occasional sets up to chest high.

Conditions: Sideshore texture/chop with SSE winds 10-15mph in the morning shifting SE 15-20mph in the afternoon.

NORTH WEST

am        pm  

Surf: Minimal (ankle high or less) surf.

Conditions: Glassy in the morning with ENE winds less than 5mph. Light sideshore texture conditions for the afternoon with the winds shifting SW 5-10mph.

WEST

am        pm  

Surf: Minimal (ankle high or less) surf.

Conditions: Clean in the morning with NE winds less than 5mph. Semi glassy/semi bumpy conditions for the afternoon with the winds shifting to the SW.

SOUTH EAST

am        pm  

Surf: Knee high E short period wind swell in the morning builds to knee to waist high for the afternoon.

Conditions: Light sideshore texture with NNE winds 5-10mph in the morning increasing to 10-15mph in the afternoon.

Data Courtesy of NOAA.gov and SwellInfo.com