Maui weather forecast for August 21, 2023: Maui now

West side

today: Mostly sunny in the morning, then becoming partly sunny. breezy. Scattered rain showers. High 80 to 92. Northeast wind gusting to 20 mph increasing to 10 to 20 mph in the afternoon. 40 percent chance of rain.

Tonight: The weather will be partly cloudy early in the evening and then become partly cloudy. breezy. Scattered rain showers. Low 71 to 78. East wind 10 to 20 mph. 40 percent chance of rain.

Tuesday: Mostly sunny. breezy. Scattered rain in the morning. High 80 to 92. East wind 10 to 25 mph. 40 percent chance of rain.

South side

today: breezy. Mostly sunny with scattered showers. High around 90. North winds up to 20 mph. Chance of rain is 20 percent.

Tonight: Partly cloudy with scattered showers. Lows 71 to 78. North winds gusting up to 15 mph. Chance of rain is 20 percent.

Tuesday: Sunny and breezy. Scattered showers in the morning. High around 92. Northeast winds gust to 15 mph and increase to 25 mph in the afternoon. Chance of rain is 20 percent.

North Beach

today: breezy. Partly cloudy with several showers. Highs 79 to 86 near shore to about 68 near 5,000 feet. Winds are east, reaching speeds of 20 mph. The chance of rain is 70 percent.

Tonight: Mostly cloudy. breezy. Scattered rain showers early in the evening, then scattered showers late evening and overnight. Lows range from 74 near shore to 50 to 56 near 5,000 feet. Winds are southeasterly up to 20 mph. The chance of rain is 70 percent.

Tuesday: Partly sunny in the morning then becoming mostly sunny. breezy. Scattered rain showers. Highs 80 to 87 near shore to about 69 near 5,000 feet. Winds are easterly 10 to 25 knots. Chance of rain is 50 percent.

Central Maui

today: breezy. Partly sunny with scattered showers. High 83 to 90. Northeast wind gusting to 20 mph increasing to 10 to 20 mph in the afternoon. 40 percent chance of rain.

Tonight: The weather will be partly cloudy early in the evening and then become partly cloudy. breezy. Scattered showers of rain in the early evening hours, then scattered showers in the late evening and during the night. Low 71 to 76. East wind 10 to 20 mph. Chance of rain is 30 percent.

Tuesday: Mostly sunny. breezy. Scattered rain in the morning. High 84 to 91. East wind 10 to 25 mph. Chance of rain is 30 percent.

The country

today: Partly sunny with scattered showers. The elevation rises from about 64 at the visitor center to about 58 at the summit. Winds are easterly, reaching speeds of 15 knots per hour. Chance of rain is 50 percent.

Tonight: breezy. Partly cloudy with scattered showers. Lows are about 51 at the visitor center to about 46 at the summit. Winds are east, reaching speeds of 20 mph. Chance of rain is 50 percent.

Tuesday: breezy. Partly sunny with scattered rain in the morning, then sunny with scattered rain in the afternoon. The elevation gain is about 65 at the visitor center to about 60 at the summit. Winds are east, reaching speeds of 20 mph. Chance of rain is 50 percent.

East Maui

today: breezy. Partly cloudy with several showers. Highs 79 to 86 near shore to about 68 near 5,000 feet. Winds are east, reaching speeds of 20 mph. The chance of rain is 70 percent.

Tonight: Mostly cloudy. breezy. Scattered rain showers early in the evening, then scattered showers late evening and overnight. Lows range from 74 near shore to 50 to 56 near 5,000 feet. Winds are southeasterly up to 20 mph. The chance of rain is 70 percent.

Tuesday: Partly sunny in the morning then becoming mostly sunny. breezy. Scattered rain showers. Highs 80 to 87 near shore to about 69 near 5,000 feet. Winds are easterly 10 to 25 knots. Chance of rain is 50 percent.

Lanai City

today: breezy. It will be mostly sunny with scattered rain in the morning, then partly sunny with scattered rain in the afternoon. High 74 to 83. Northeast wind gusts to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain is 30 percent.

Tonight: The weather will be partly cloudy early in the evening and then become partly cloudy. breezy. Scattered showers of rain in the early evening hours, then scattered showers in the late evening and during the night. Low around 68. Northeast wind 10 to 20 mph. Chance of rain is 30 percent.

Tuesday: breezy. Partly sunny with scattered showers in the morning, then mostly sunny with scattered showers in the afternoon. High 75 to 83. East winds up to 20 mph. Chance of rain is 30 percent.

Traveling on fours

today: breezy. Mostly sunny with scattered showers. High 71 to 93. Northeast wind 10 to 20 mph. Chance of rain is 20 percent.

Tonight: breezy. Partly cloudy with scattered showers. Low between 60 and 77. Winds are northeasterly, 10 to 20 knots. Chance of rain is 20 percent.

Tuesday: Sunny and breezy. Scattered showers in the morning. High 71 to 93. East wind 10 to 25 mph. Chance of rain is 20 percent.

summary

Expect increased precipitation statewide today, especially across leeward areas, with the greatest shower coverage expected over the Big Island and East Maui. Leeward areas, including the Lahaina and Kula areas on Maui, will remain mostly dry with a few light rains possible. Fresh and increasingly dry trade wind weather will return on Tuesday through the rest of this week.

discussion

Recent satellite and radar images show increasing clouds and rain moving toward leeward areas on most islands early this morning, associated with residual moisture from former Tropical Cyclone Fernanda. The most shower activity is occurring over the coast and leeward slopes of the Big Island, where 0.01 to 0.25 inches of rain has already fallen in some locations over the past six hours.
As we head into the rest of this morning, the leeward areas of the Big Island and Maui will continue to see the bulk of the precipitation. Despite decreasing trends in typical rainfall amounts, we could still see total events of around 2 to 4 inches of rain on the leeward Big Island through tonight. Short periods of heavy rain are possible during this time, which can lead to distressing flooding. On Maui, 1 to 2 inches of rain will be possible, primarily concentrated on East Maui’s slopes and coastal areas. Windy areas of Maui (including Lahaina and Kula) will remain mostly dry, with a few light rain showers possible during the evening hours. As for the rest of the states, light to moderate rain is expected to spread mainly to windward and mountainous areas until Tuesday morning. Humidity levels will be higher than normal during this time, which will make daytime temperatures hotter than normal.
Trade winds will also trend upward over the next couple of days as surface high pressure intensifies in the far north of the state and drifts slightly south. Moderate winds this morning will steadily increase to breeze levels through tonight. Tuesday afternoon into Wednesday, conditions will dry out, with a mid-level ridge appearing over the area. A mostly dry and breezy trade wind system is likely to persist through the rest of this week.

airline

The eastern trade winds will continue to be moderate to brisk, with clouds and showers appearing over the mountainous and windy areas. Shower coverage increased steadily overnight, which will continue today as an area of ​​deep tropical moisture moves in. Expect periods of MVFR CIGs/VSBYs for leeward and mocha areas, especially in the eastern end of the state. Elsewhere, VFR conditions will prevail.
AIRMET Sierra Blocking Mountains are now in effect for windward areas from Oahu to the Big Island, which may persist through much of the day today.

Navy

The trade winds will gradually increase today with an intensifying surface high centered around 1,600 nautical miles northeast of the islands, and the remainder of Fernanda passing well south of the islands. Fresh to locally strong trade winds are then expected to continue throughout the week, and a Small Boat Advisory will remain in effect for windier areas around Maui and the Big Island.
Surfing along all the beaches will still be relatively small today. Long-range swell E from former major Hurricane Hillary is expected to reach the far eastern Pacific by tonight, peaking near 4 feet on Tuesday and Wednesday, then decreasing Wednesday and Thursday night. Confidence remains low on details, but beach surfing is likely to remain below advisory levels, with the biggest surfing centered on the Big Island and Maui. As the longer-term trade wind swell diminishes, the short-term trade wind swell will increase to approach seasonal norms. A small to medium-period SSE swell (with a little SW swell energy as well) will bring small waves to south-facing beaches in the next couple of days.

HFO Watches/Warnings/Advice

Small Boat Advisory until 6pm GMT Wednesday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters and Big Island Southeast Waters.

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Data provided by NOAA.gov