Hilo

Tonight: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 64 to 70 near the shore to 50 to 57 at 4000 feet. North winds up to 15 mph. Chance of rain 70 percent.

Monday: Partly sunny with scattered showers. Highs 79 to 85 near the shore to around 68 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Monday Night: Mostly cloudy with scattered showers. Lows 64 to 70 near the shore to 51 to 58 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Kona

Tonight: Mostly cloudy. Scattered showers in the evening, then isolated showers after midnight. Lows around 72 near the shore to 48 to 54 near 5000 feet. Light winds. Chance of rain 40 percent.

Monday: Mostly sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs 83 to 88 near the shore to around 68 near 5000 feet. Light winds. Chance of rain 40 percent.

Monday Night: Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows around 72 near the shore to 48 to 53 near 5000 feet. Light winds. Chance of rain 50 percent.

Waimea

Tonight: Mostly cloudy. Breezy. Scattered showers in the evening, then isolated showers after midnight. Lows 63 to 71 near the shore to 54 to 62 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Monday: Partly sunny in the morning then becoming mostly sunny. Breezy. Isolated showers. Highs around 80 near the shore to 71 to 79 near 3000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.

Monday Night: Breezy. Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 63 to 72 near the shore to 55 to 62 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Kohala

Tonight: Mostly cloudy. Breezy. Scattered showers in the evening, then isolated showers after midnight. Lows 63 to 71 near the shore to 54 to 62 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Monday: Partly sunny in the morning then becoming mostly sunny. Breezy. Isolated showers. Highs around 80 near the shore to 71 to 79 near 3000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.

Monday Night: Breezy. Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 63 to 72 near the shore to 55 to 62 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

South Big Island

Tonight: Mostly cloudy. Breezy. Lows around 73 near the shore to around 52 near 5000 feet. East winds up to 25 mph.

Monday: Mostly sunny. Breezy. Isolated showers in the afternoon. Highs around 87 near the shore to around 67 near 5000 feet. East winds up to 25 mph. Chance of rain 20 percent.

Monday Night: Mostly clear. Breezy. Isolated showers in the evening. Lows around 73 near the shore to around 52 near 5000 feet. East winds 10 to 20 mph. Chance of rain 20 percent.

Puna

Tonight: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 64 to 70 near the shore to 50 to 57 at 4000 feet. North winds up to 15 mph. Chance of rain 70 percent.

Monday: Partly sunny with scattered showers. Highs 79 to 85 near the shore to around 68 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Monday Night: Mostly cloudy with scattered showers. Lows 64 to 70 near the shore to 51 to 58 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Waikoloa

Tonight: Mostly cloudy. Breezy. Lows around 73 near the shore to 50 to 55 above 4000 feet. East winds up to 20 mph.

Monday: Mostly sunny. Breezy. Isolated showers in the afternoon. Highs 84 to 90 near the shore to 65 to 74 above 4000 feet. Northeast winds up to 20 mph. Chance of rain 20 percent.

Monday Night: Mostly clear. Lows around 73 near the shore to 50 to 55 above 4000 feet. East winds up to 15 mph.

Detailed Forecast

Synopsis

Breezy trades will focus clouds and showers over windward and mauka areas through the week, especially during the overnight and early morning hours.

Discussion

Typical June weather will persist through the week, with locally breezy trade winds focusing showers over windward and mauka areas. Broad surface high pressure far north of the state will maintain trades near current strength through at least Wednesday, followed by a slight decrease in winds on Thursday as the high shifts to the northeast. A mid-level ridge overhead will maintain stable conditions, and little organized moisture is forecast to be moving along the trade wind flow. As a result, expect showers to be focused along windward areas, especially at night, with rainfall accumulations of less than a half of an inch per day at most sites. Leeward areas will continue to be rather dry, except for scattered afternoon showers along the Kona slopes of the Big Island. Thin high clouds will pass over the islands into Monday, then dissipate as an upper-level low west of the state drifts away.

Aviation

Stable, breezy trades deliver clouds and showers mainly to windward and mauka zones through the period. VFR prevails, but MVFR will be possible within any showers.
AIRMET Tango remains in effect for low-level lee turb.

Marine

High pressure north of Hawaii will drive trade winds through the week, with a slight weakening trend as the high moves away eastward. A Small Craft Advisory (SCA) for the windier waters and channels near Maui and the Big Island goes through Monday night, likely extending beyond this point.
A series of small, long-period, south swells will help boost surf heights along south facing shores though the week. The current south swell will decline over the next couple days followed by another south swell from Wednesday into Thursday.
Rough and choppy surf along east facing shores will continue this week. Surf will remain nearly flat along north facing shores throughout the forecast period.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 AM HST Tuesday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.

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Data Courtesy of NOAA.gov