Hilo

Rest Of Tonight: Mostly cloudy with scattered showers. Lows 62 to 69 near the shore to 49 to 57 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 50 percent.

Monday: Partly sunny with scattered showers. Highs 78 to 83 near the shore to 64 to 69 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Monday Night: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 62 to 69 near the shore to 49 to 57 at 4000 feet. Northwest winds up to 10 mph. Chance of rain 70 percent.

Kona

Rest Of Tonight: Partly cloudy early in the evening, then mostly cloudy with isolated showers after midnight. Haze through the night. Lows around 72 near the shore to 45 to 52 near 5000 feet. Light winds. Chance of rain 20 percent.

Monday: Mostly cloudy. Haze. Highs 83 to 89 near the shore to around 66 near 5000 feet. Northwest winds up to 10 mph.

Monday Night: Mostly cloudy with isolated showers in the evening, then partly cloudy after midnight. Haze through the night. Lows around 72 near the shore to 46 to 52 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

Rest Of Tonight: Partly cloudy early in the evening then becoming mostly cloudy. Breezy. Isolated showers. Lows 61 to 70 near the shore to 52 to 61 near 3000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.

Monday: Breezy. Partly sunny with isolated showers. Highs around 79 near the shore to 69 to 78 near 3000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.

Monday Night: Breezy. Mostly cloudy with scattered showers. Lows 61 to 70 near the shore to 52 to 61 near 3000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Kohala

Rest Of Tonight: Partly cloudy early in the evening then becoming mostly cloudy. Breezy. Isolated showers. Lows 61 to 70 near the shore to 52 to 61 near 3000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.

Monday: Breezy. Partly sunny with isolated showers. Highs around 79 near the shore to 69 to 78 near 3000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.

Monday Night: Breezy. Mostly cloudy with scattered showers. Lows 61 to 70 near the shore to 52 to 61 near 3000 feet. East winds up to 20 mph. Chance of rain 50 percent.

South Big Island

Rest Of Tonight: Mostly clear. Haze through the night. Lows around 72 near the shore to around 49 near 5000 feet. Northeast winds up to 15 mph.

Monday: Mostly sunny in the morning then becoming partly sunny. Breezy and haze. Highs around 86 near the shore to around 66 near 5000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon.

Monday Night: Partly cloudy. Breezy. Haze through the night. Lows around 72 near the shore to around 50 near 5000 feet. Northeast winds 10 to 20 mph.

Puna

Rest Of Tonight: Mostly cloudy with scattered showers. Lows 62 to 69 near the shore to 49 to 57 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 50 percent.

Monday: Partly sunny with scattered showers. Highs 78 to 83 near the shore to 64 to 69 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Monday Night: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 62 to 69 near the shore to 49 to 57 at 4000 feet. Northwest winds up to 10 mph. Chance of rain 70 percent.

Waikoloa

Rest Of Tonight: Partly cloudy early in the evening then becoming mostly cloudy. Breezy. Haze early in the evening. Lows around 72 near the shore to 48 to 54 above 4000 feet. Southeast winds up to 20 mph.

Monday: Partly sunny. Breezy. Haze through the day. Scattered showers in the afternoon. Highs 81 to 89 near the shore to 63 to 72 above 4000 feet. Northeast winds up to 25 mph. Chance of rain 50 percent.

Monday Night: Partly cloudy. Breezy. Haze in the evening. Lows around 72 near the shore to 49 to 54 above 4000 feet. Southeast winds up to 20 mph.

Detailed Forecast

Synopsis

High pressure far the northeast will drive breezy trade winds with mainly windward and mauka showers. An upper low moving across the state could increase shower coverage and intensity Thursday through next weekend

Discussion

High pressure far northeast of Hawaii will drive breezy trade winds through the next week, with slight variations through the week. Cumulus clouds and scattered showers will move across the state pushed along by the trades, focusing mostly over windward and mauka sides of the islands. Isolated showers will pass over leeward areas of the smaller islands at times, but will not linger long. Most showers will fall during the overnight and early morning time frames, except for Big Island which will receive most of the showers during the afternoon. Overall rainfall amounts will be insignificant through midweek. An upper low moving across the state could increase shower coverage and intensity Thursday through next weekend, with a similar distribution across mostly the windward and mauka areas.

Aviation

VFR prevails with isolated MVFR as breezy trades deliver clouds and showers to windward and mauka areas. Shower coverage then increases tonight for windward portions of Maui through Oahu potentially warranting AIRMET Sierra for mountain obscuration overnight.
AIRMET Tango for lee turb remains in effect.

Marine

Fresh to locally strong trade winds will continue as an area of high pressure remains far north of the state through the next couple of days. A Small Craft Advisory (SCA) remains in effect for most Hawaiian waters as a result, through late Monday afternoon. The high is expected to slowly drift the east, which will allow the trades to weaken slightly Tuesday through mid-week. As that happens, expect the SCA to be scaled back to the more typical waters near Maui and the Big Island through the remainder of the week.
The current long period south-southwest swell continue to keep surf elevated today just below advisory levels. Surf is expected to begin a slow decline over the next few hours that will continue through mid-week.
Surf along east-facing shores will be rough and choppy today due to the stronger trade winds. Rough and choppy surf will persist throughout the week with a slight decrease in surf heights as the trades ease slightly by mid-week.
A series of small northwest swells will keep small surf in place along north facing shores through next weekend.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 PM HST Monday for Kauai Northwest Waters, Kauai Leeward Waters, Kauai Channel, Oahu Windward Waters, Oahu Leeward Waters, Kaiwi Channel, Maui County Windward Waters, Maui County Leeward Waters, Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.

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Data Courtesy of NOAA.gov