Weather Forecast

Hawaii County Weather Forecast for July 20, 2022

July 20, 2022, 7:16 AM HST
Listen to this Article
5 minutes
Loading Audio...
A
A
A

no slideshow

Hilo

Today: Mostly sunny in the morning then becoming partly sunny. Scattered showers. Highs 78 to 83 near the shore to 63 to 71 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Tonight: Mostly cloudy. Showers likely in the evening, then occasional showers after midnight. Lows 64 to 71 near the shore to around 56 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 80 percent.

Thursday: Partly sunny. Showers likely in the morning, then scattered showers in the afternoon. Highs around 81 near the shore to 63 to 70 at 4000 feet. Northeast winds 10 to 15 mph decreasing to up to 15 mph in the afternoon. Chance of rain 70 percent.

Kona

Today: Sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs around 85 near the shore to around 67 near 5000 feet. West winds up to 10 mph. Chance of rain 40 percent.

Tonight: Mostly cloudy in the evening then becoming mostly clear. Isolated showers. Lows 69 to 74 near the shore to 51 to 56 near 5000 feet. Light winds becoming northeast up to 10 mph after midnight. Chance of rain 20 percent.

ARTICLE CONTINUES BELOW AD

Thursday: Sunny in the morning, then mostly cloudy with scattered showers in the afternoon. Highs around 86 near the shore to around 68 near 5000 feet. West winds up to 10 mph. Chance of rain 40 percent.

Waimea

ARTICLE CONTINUES BELOW AD

Today: Mostly sunny. Breezy. Isolated showers in the morning, then scattered showers in the afternoon. Highs 67 to 87. East winds 10 to 25 mph. Chance of rain 50 percent.

Tonight: Breezy. Mostly cloudy with scattered showers. Lows 63 to 69 near the shore to 55 to 63 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

Thursday: Partly sunny in the morning then becoming mostly sunny. Breezy. Scattered showers. Highs 66 to 87. East winds 10 to 20 mph. Chance of rain 50 percent.

Kohala

ARTICLE CONTINUES BELOW AD

Today: Mostly sunny. Breezy. Isolated showers in the morning, then scattered showers in the afternoon. Highs 67 to 87. East winds 10 to 25 mph. Chance of rain 50 percent.

Tonight: Breezy. Mostly cloudy with scattered showers. Lows 63 to 69 near the shore to 55 to 63 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

Thursday: Partly sunny in the morning then becoming mostly sunny. Breezy. Scattered showers. Highs 66 to 87. East winds 10 to 20 mph. Chance of rain 50 percent.

South Big Island

Today: Sunny and breezy. Isolated showers in the afternoon. Highs around 85 near the shore to around 66 near 5000 feet. East winds up to 25 mph. Chance of rain 20 percent.

Tonight: Mostly clear. Breezy. Isolated showers in the evening. Lows around 73 near the shore to around 52 near 5000 feet. Northeast winds up to 15 mph increasing to 10 to 20 mph after midnight. Chance of rain 20 percent.

Thursday: Sunny and breezy. Isolated showers in the afternoon. Highs around 86 near the shore to around 68 near 5000 feet. East winds 10 to 20 mph decreasing to up to 20 mph in the afternoon. Chance of rain 20 percent.

Puna

Today: Mostly sunny in the morning then becoming partly sunny. Scattered showers. Highs 78 to 83 near the shore to 63 to 71 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Tonight: Mostly cloudy. Showers likely in the evening, then occasional showers after midnight. Lows 64 to 71 near the shore to around 56 at 4000 feet. Northwest winds up to 15 mph. Chance of rain 80 percent.

Thursday: Partly sunny. Showers likely in the morning, then scattered showers in the afternoon. Highs around 81 near the shore to 63 to 70 at 4000 feet. Northeast winds 10 to 15 mph decreasing to up to 15 mph in the afternoon. Chance of rain 70 percent.

Waikoloa

Today: Sunny and breezy. Highs 82 to 89 near the shore to 65 to 74 above 4000 feet. Northeast winds up to 25 mph.

Tonight: Mostly clear. Breezy. Isolated showers in the evening. Lows 69 to 74 near the shore to 48 to 56 above 4000 feet. Southeast winds up to 20 mph. Chance of rain 20 percent.

Thursday: Sunny. Highs 82 to 89 near the shore to 66 to 73 above 4000 feet. Northeast winds up to 15 mph.

Detailed Forecast

Synopsis

Locally breezy trades prevail through the week. A typical summertime weather pattern will focus clouds and showers over windward slopes. Aside from afternoon showers over the Kona slopes of the Big Island, leeward areas will be rather dry.

Discussion

No meaningful changes in the local weather from day to day as background conditions remain more or less stagnant for the balance of the forecast period. Locally breezy trades will focus showers over windward and mauka zones, mainly at night. High stability in the lowest 6kft will tend to limit shower intensity and will further reinforce dry conditions over leeward zones. Overall, a benign weather pattern characeristic of mid-summer. Global models indicate a wave embedded in the easterlies will pass south of the Big Island late Thursday through Friday. The associated moisture will remain well south of the area, but a slight boost in trades over the eastern end of the state is possible.

Aviation

High pressure north of the area will keep breezy to locally strong trade winds going for the next few days. AIRMET Tango will remain in effect for the foreseeable future for low-level turbulence over and downwind of the terrain of all islands.
Clouds and passing light showers will continue to favor windward and mauka areas through the forecast period. Brief periods of MVFR cigs and vsbys remain possible, with increasing chances during the morning and overnight hours. Otherwise, expect VFR conditions to prevail across the state.

Marine

High pressure north or the state will keep moderate to locally strong trade winds in place through the forecast period, with only minor fluctuations in strength. A Small Craft Advisory remains in effect for the typically windy waters around Maui and the Big Island through 6 PM Thursday.
The current south swell will continue to slowly decline today and tonight, with only small surf expected Thursday through the weekend. A new small, long-period south swell could give south shore surf a small boost early next week.
Steady trade wind swell will keep east shore surf near to slightly below normal levels during the next 7 days. A small, longer period east swell associated with tropical cyclone Estelle may give surf a small boost over the weekend. North shore surf will remain flat during the next 7 days.

HFO Watches/Warnings/Advisories

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

Big Island Now Weather is brought to you by Blue Hawaiian Helicopters.

Check out their Big Island Helicopter Tours today!

Data Courtesy of NOAA.gov

Subscribe to our Newsletter

Stay in-the-know with daily or weekly
headlines delivered straight to your inbox.
Cancel
Mahalo for Subscribing
×

Comments

This comments section is a public community forum for the purpose of free expression. Although Big Island Now encourages respectful communication only, some content may be considered offensive. Please view at your own discretion. View Comments