Weather Forecast

Maui Weather Forecast for September 02, 2022

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Photo Credit: Allen Tate

West Side

Today: Sunny. Highs 83 to 90. East winds up to 15 mph.

Tonight: Partly cloudy with scattered showers. Lows 68 to 75. Northeast winds up to 15 mph. Chance of rain 50 percent.

Saturday: Mostly sunny with isolated showers in the morning, then partly sunny with scattered showers in the afternoon. Highs 84 to 91. East winds up to 15 mph. Chance of rain 40 percent.

South Side

Today: Sunny. Highs 87 to 92. North winds up to 15 mph.

Tonight: Mostly clear. Isolated showers after midnight. Lows around 69. North winds up to 15 mph. Chance of rain 20 percent.

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Saturday: Mostly sunny. Isolated showers in the afternoon. Highs 88 to 93. North winds up to 15 mph. Chance of rain 20 percent.

North Shore

Today: Mostly sunny with isolated showers. Highs 82 to 88 near the shore to around 69 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Showers likely in the evening, then occasional showers after midnight. Lows 65 to 72 near the shore to around 55 near 5000 feet. East winds up to 15 mph. Chance of rain 90 percent.

Saturday: Mostly cloudy. Occasional showers in the morning, then showers likely in the afternoon. Highs 83 to 89 near the shore to 63 to 68 near 5000 feet. East winds up to 15 mph. Chance of rain 80 percent.

Central Maui

Today: Mostly sunny. Highs around 90. Northeast winds up to 15 mph.

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Tonight: Partly cloudy with isolated showers. Lows 67 to 73. Northeast winds up to 15 mph. Chance of rain 20 percent.

Saturday: Mostly sunny in the morning then becoming partly sunny. Breezy. Isolated showers. Highs around 91. Northeast winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 20 percent.

Upcountry

Today: Sunny. Isolated showers in the afternoon. Highs around 65 at the visitor center to around 62 at the summit. East winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly clear with scattered showers. Lows around 50 at the visitor center to around 47 at the summit. East winds up to 15 mph. Chance of rain 50 percent.

Saturday: Mostly sunny in the morning then becoming partly sunny. Scattered showers. Highs around 60 at the visitor center to around 56 at the summit. East winds up to 15 mph. Chance of rain 50 percent.

East Maui

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Today: Mostly sunny with isolated showers. Highs 82 to 88 near the shore to around 69 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Showers likely in the evening, then occasional showers after midnight. Lows 65 to 72 near the shore to around 55 near 5000 feet. East winds up to 15 mph. Chance of rain 90 percent.

Saturday: Mostly cloudy. Occasional showers in the morning, then showers likely in the afternoon. Highs 83 to 89 near the shore to 63 to 68 near 5000 feet. East winds up to 15 mph. Chance of rain 80 percent.

Lanai City

Today: Mostly sunny. Isolated showers in the afternoon. Highs 75 to 84. Northeast winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly clear. Lows around 68. Northeast winds 10 to 15 mph decreasing to up to 15 mph after midnight.

Saturday: Mostly sunny in the morning, then partly sunny with scattered showers in the afternoon. Highs 74 to 83. East winds up to 15 mph shifting to the northeast in the afternoon. Chance of rain 50 percent.

Kaunakakai

Today: Mostly sunny. Isolated showers in the afternoon. Highs 79 to 89. East winds 10 to 15 mph. Chance of rain 20 percent.

Tonight: Partly cloudy with isolated showers. Lows 62 to 73. Northeast winds 10 to 15 mph shifting to the east after midnight. Chance of rain 20 percent.

Saturday: Mostly sunny with isolated showers in the morning, then partly sunny with scattered showers in the afternoon. Highs 79 to 89. East winds up to 15 mph shifting to the northeast in the afternoon. Chance of rain 50 percent.

Detailed Forecast

Synopsis

Light to moderate trades will prevail today through Saturday, allowing localized land and sea breezes to develop in the more sheltered leeward areas. Drier weather will overspread the islands today, with an increase in trade wind showers then expected tonight through early Sunday as an area of enhanced moisture moves from east to west across the state. Drier conditions and moderate trades will return by Sunday afternoon and hold through the first half of Labor Day. Another round of increased showers could move through later on Labor Day and continue into early Tuesday. Drier conditions and moderate trades are then forecast Tuesday afternoon through Thursday.

Discussion

Currently at the surface, a weakening stationary front is located around 200 miles north of Kauai, while a ridge is positioned around 800 miles north of the Garden Isle. The ridging has weakened a bit since last evening, with light to moderate trade winds now prevailing across the island chain. Infrared satellite imagery shows partly to mostly cloudy skies across the state, with cloud coverage the highest over the central islands. Radar imagery shows scattered to numerous showers across Maui County and Oahu, with less shower activity over Kauai and the Big Island. Main short term focus revolves around trade wind trends and rain chances during the next few days.
The front north of the islands will gradually dissipate today. A trough will develop along the old frontal remnants over the weekend, and slide by a couple hundred miles north of the state on Sunday. Otherwise, surface ridging will remain the dominant weather feature to the north of the islands during the next 7 days. Light to moderate trades will prevail today through Saturday, with localized land and sea breezes in the more sheltered leeward areas. The trades should strengthen back to moderate levels on Sunday, and hold generally at moderate levels through much of next week.
As for the remaining weather details, after some morning showers, a drier airmass looks to overspread the state by mid to late morning and hold in place through the afternoon, keeping shower activity rather sparse in most areas. An area of deeper moisture then appears to slide from east to west through the islands tonight through Sunday morning, which should bring an increase in trade wind showers, particularly to windward slopes and coasts, and perhaps some more leeward and interior shower development Saturday afternoon. A drier trade wind pattern should then return Sunday afternoon through the morning hours of Labor Day. The next area of deeper moisture appears to slide from east to west through the islands later Labor Day through early Tuesday, with a return to a drier trade wind pattern Tuesday afternoon through Thursday.

Aviation

Early this morning, a band of moisture is moving across the central islands from Oahu to Maui. This has increased shower activity and cloud coverage, though ceilings have generally ranged from 6,000 to 7,500 feet with VFR conditions prevailing at most locations.
A weak front north of the islands will maintain moderate trade winds for the next couple of days. This will allow localized sea breezes to develop over leeward areas of the smaller islands again this afternoon, increasing interior cloud cover and shower activity. The Kona slopes of the Big Island will experience sea breezes and enhanced clouds/showers later today as well. Clouds and showers will diminish for leeward locations overnight, favoring windward and mountain areas. Regardless, VFR conditions will prevail for most locations over the next 24 hours with only brief MVFR conditions possible in passing trade showers.
There are currently no AIRMETs in effect, and none are expected at this time.

Marine

Moderate to fresh easterly trades will persist through Saturday, then strengthen into the fresh to strong category Sunday into early next week as high pressure builds to the north.
Surf along south facing shores will remain small through next week with mainly reinforcing shots of south and south-southwest background level swells moving through. The next small source will arrive over the weekend out of the south-southwest, likely enough to keep the surf from going flat. For the extended, a decent south-southwest swell could arrive locally next weekend (around the 10th), depending on how the source evolves as it passes south of the Tasman Sea and New Zealand this weekend.
Surf along north facing shore will remain small through next week, with mainly the small north-northeast medium period energy continuing due to the deep troughing and systems in/near the Gulf of Alaska. Guidance does show a compact low moving eastward over the western Aleutians this weekend with a batch of fresh breezes setting up within the 330-340 directional band relative to the islands. If this materializes, a small north-northwest swell could arrive by next Thursday.
Surf along east facing shores will remain well below seasonal average into next week.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov

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