Forecast for Big Island Windward and Southeast

Forecast for Big Island Leeward

Swell Summary

North and west-facing shore surf that peaked yesterday evening will gradually fall through the day with the fading northwest swell. A pair of moderate size, medium to long period north northwest swells are timed to arrive Tuesday into Wednesday and Thursday into Friday. An early week northwest swell originating from a compact hurricane force low east of Japan will begin filling in late Monday and peaking Tuesday. The later week north northwest swell coming from a broader area of gale force winds southwest of the Aleutian Islands may arrive and peak Friday. While the first swell origin's source is a deeper low, it is farther away and swell size may be compromised by angular spreading along its long eastern journey. The late week swell fetch area's gales are more in-line with the great circle route aimed toward the islands. This will probably be the larger of the two swells and may push surf to High Surf Warning levels as it arrives from a more northerly direction. Generally strong trades will continue to generate rough, choppy surf along east-facing shores through the day with a gradual early week decline as a result of weakening easterlies. A slight increase in surf along south-facing shores may occur later today and Monday with the arrival of a small, longer period southwest swell.

NORTH EAST

am        pm  

Surf: Chest to shoulder high N short period wind swell for the morning going more NNE and building into the chest to head range in the afternoon.

Conditions: Bumpy/choppy with NNE winds 15-20mph in the morning shifting NNW for the afternoon.

NORTH WEST

am        pm  

Surf: Waist to chest high N short period wind swell.

Conditions: Choppy/disorganized with NNE winds 10-15mph in the morning increasing to 20-25mph in the afternoon.

WEST

am        pm  

Surf: Knee high NW short period wind swell in the morning with occasional thigh high sets. This drops a bit in the afternoon.

Conditions: Glassy in the morning with ESE winds less than 5mph. Semi glassy conditions for the afternoon with the winds shifting to the SSE.

SOUTH EAST

am        pm  

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

Conditions: Sideshore/choppy with NNE winds 15-20mph in the morning shifting N 20-25mph in the afternoon.

Data Courtesy of NOAA.gov and SwellInfo.com