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Big Island Weather

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This Afternoon

82° F
Mostly Sunny
Wind 12 to 16 mph E

Tonight

68° F
Mostly Clear
Wind 13 mph ENE

Saturday

81° F
Sunny then Isolated Rain Showers
Wind 14 mph E

Saturday Night

68° F
Mostly Clear
Wind 13 mph E

Sunday

81° F
Sunny
Wind 10 to 14 mph E

Sunday Night

68° F
Mostly Clear
Wind 12 mph ENE

Monday

82° F
Mostly Sunny then Isolated Rain Showers
Wind 12 mph E

Monday Night

69° F
Partly Cloudy
Wind 12 mph E

Tuesday

83° F
Sunny
Wind 13 mph E

Tuesday Night

69° F
Mostly Clear
Wind 12 mph E

Wednesday

83° F
Sunny
Wind 13 mph E

Wednesday Night

69° F
Mostly Clear
Wind 12 mph E

Thursday

82° F
Mostly Sunny
Wind 13 mph E

Thursday Night

69° F
Partly Cloudy
Wind 13 mph E
Cloud Weather Radar

Regional Big Island Weather Forecast Hawaii County Weather Forecast for July 11, 2025


no slideshow

Hilo

Tonight: Mostly cloudy with scattered showers. Lows 64 to 70 near the shore to 50 to 57 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Friday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs 79 to 85 near the shore to 65 to 70 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.

Friday Night: Cloudy. Numerous showers in the evening, then occasional showers after midnight. Lows 64 to 71 near the shore to 52 to 59 at 4000 feet. Northeast winds up to 10 mph shifting to the northwest after midnight. Chance of rain 80 percent.

Kona

Tonight: Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Haze. Lows around 72 near the shore to 48 to 53 near 5000 feet. Light winds. Chance of rain 50 percent.

Friday: Mostly sunny with isolated showers in the morning, then partly sunny with scattered showers in the afternoon. Haze through the day. Highs around 85 near the shore to 65 to 70 near 5000 feet. Light winds. Chance of rain 30 percent.

Friday Night: Partly cloudy. Isolated showers in the evening. Haze through the night. Lows 70 to 75 near the shore to 48 to 53 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

Tonight: Partly cloudy. Breezy. Scattered showers in the evening, then isolated showers after midnight. Lows 63 to 71 near the shore to 54 to 63 near 3000 feet. East winds 10 to 25 mph. Chance of rain 30 percent.

Friday: Breezy. Partly sunny with scattered showers. Highs around 80 near the shore to 68 to 79 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Friday Night: Mostly cloudy with scattered showers. Lows 63 to 72 near the shore to 54 to 63 near 3000 feet. East winds 10 to 15 mph decreasing to up to 15 mph after midnight. Chance of rain 50 percent.

Kohala

Tonight: Partly cloudy. Breezy. Scattered showers in the evening, then isolated showers after midnight. Lows 63 to 71 near the shore to 54 to 63 near 3000 feet. East winds 10 to 25 mph. Chance of rain 30 percent.

Friday: Breezy. Partly sunny with scattered showers. Highs around 80 near the shore to 68 to 79 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Friday Night: Mostly cloudy with scattered showers. Lows 63 to 72 near the shore to 54 to 63 near 3000 feet. East winds 10 to 15 mph decreasing to up to 15 mph after midnight. Chance of rain 50 percent.

South Big Island

Tonight: Mostly clear. Breezy. Isolated showers in the evening. Haze through the night. Lows around 74 near the shore to around 53 near 5000 feet. Northeast winds up to 20 mph increasing to 10 to 20 mph after midnight. Chance of rain 20 percent.

Friday: Mostly sunny. Breezy. Haze through the day. Isolated showers in the afternoon. Highs around 87 near the shore to around 67 near 5000 feet. East winds 10 to 25 mph. Chance of rain 20 percent.

Friday Night: Mostly clear. Breezy and haze. Lows around 74 near the shore to around 53 near 5000 feet. Northeast winds 10 to 20 mph.

Puna

Tonight: Mostly cloudy with scattered showers. Lows 64 to 70 near the shore to 50 to 57 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Friday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs 79 to 85 near the shore to 65 to 70 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.

Friday Night: Cloudy. Numerous showers in the evening, then occasional showers after midnight. Lows 64 to 71 near the shore to 52 to 59 at 4000 feet. Northeast winds up to 10 mph shifting to the northwest after midnight. Chance of rain 80 percent.

Waikoloa

Tonight: Partly cloudy. Breezy. Scattered showers in the evening. Haze through the night. Lows around 73 near the shore to 49 to 55 above 4000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Friday: Mostly sunny. Breezy. Haze through the day. Isolated showers in the afternoon. Highs 84 to 90 near the shore to 64 to 73 above 4000 feet. Northeast winds up to 20 mph. Chance of rain 20 percent.

Friday Night: Partly cloudy. Haze. Lows 71 to 76 near the shore to around 52 above 4000 feet. East winds up to 10 mph.

Detailed Forecast

Synopsis

High pressure far north and northeast of the state will maintain moderate to locally breezy trades through Friday, with winds starting to weaken over the weekend. Expect to see fairly typical summertime weather into next week as clouds and showers favor windward and mauka areas.

Discussion

A 1032 mb surface high remains well north and northeast of the Hawaiian Islands, with moderate to locally breezy trades blowing across the state this afternoon. Satellite imagery continues to show clouds moving into windward and mauka areas, with a band of moisture moving towards Maui County. Radar imagery shows some enhanced showers embedded in this moisture that is currently moving into Molokai. Expect this band of moisture to shift towards Oahu and Kauai tonight bringing a slight increase in clouds and showers. Otherwise, expect fairly typical summertime conditions tonight.
Guidance continues to show the high slowly drifting north over the weekend and into next week, with winds weakening a bit starting Saturday. It also shows no organized bands of moisture upstream of the islands, with a fairly typical dry and stable summertime air mass over the region. As such, expect clouds to favor windward and mauka areas, with passing showers moving in at times through the forecast period. Kona Slopes of the Big Island will also continue to see the typical summertime afternoon showers as the sea breeze develops across leeward Big Island.
The one wrinkle to the forecast will be the evolution of an upper level disturbance to the north of the islands. This disturbance could help to enhance instability over the western half of the state which could bring some enhanced showers this weekend and early next week.

Aviation

Fresh to locally strong winds will persist into the weekend. AIRMET Tango is posted for tempo moderate turbulence below 8000 feet leeward of mountains for all Hawaiian islands due to winds and the stable atmosphere.
A band of incoming low clouds and showers will impact Maui County late this afternoon and tonight, and spread to Oahu later tonight. AIRMET Sierra is posted for tempo mountain obscurations above 2500 feet along windward sides of Maui and Molokai. This AIRMET will likely be needed for windward Oahu later tonight, and possibly Kauai early Friday morning. Prevailing VFR conditions expected for Big Island.

Marine

High pressure far northeast of the Hawaiian waters will drive moderate to locally strong trade winds through Friday. As such, the Small Craft Advisory is in effect for the typical windy waters around Maui County and Big Island through Friday afternoon. Trades will ease slightly later this weekend into early next week as the high moves further away to the north.
The recent small, long period south swell will continue its decline through tomorrow. Two more small, long period south swells are scheduled to arrive Friday night into Saturday and Sunday night into Monday. The first of these swells will likely only lead to a minor bump in surf, while the second is expected to be a little more noticeable. However, south-facing shore surf will likely remain below the summer average through the next several days.
East-facing shore surf will remain rough and choppy as moderate to locally strong trades blow through Friday, then drop a notch as the trades ease slightly later this weekend into early next week. A very small northwest swell originating behind a front hanging up far northwest of the islands is expected to arrive early next week.

Fire weather

Moderate to locally breezy trades will continue through Friday, then weaken slightly over the weekend and into next week. Afternoon relative humidity remains near summertime normals, with fairly typical fire weather conditions expected.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 PM HST Friday 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.

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Data Courtesy of NOAA.gov

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