West Side

Tonight: Partly cloudy. Isolated showers in the evening. Lows 68 to 75. East winds up to 15 mph. Chance of rain 20 percent.

Tuesday: Mostly sunny. Isolated showers in the morning. Highs 80 to 85. East winds up to 15 mph. Chance of rain 20 percent.

Tuesday Night: Mostly cloudy. Isolated showers in the evening. Lows 68 to 75. East winds up to 15 mph. Chance of rain 20 percent.

South Side

Tonight: Partly cloudy. Lows 68 to 76. Northwest winds up to 10 mph.

Tuesday: Mostly sunny. Highs around 88. North winds up to 15 mph.

Tuesday Night: Mostly cloudy. Lows 68 to 76. Northwest winds up to 15 mph.

North Shore

Tonight: Partly cloudy. Isolated showers in the evening, then scattered showers after midnight. Lows around 72 near the shore to around 52 near 5000 feet. Southeast winds up to 15 mph. Chance of rain 50 percent.

Tuesday: Breezy. Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 79 to 85 near the shore to around 67 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Tuesday Night: Mostly cloudy with scattered showers. Lows around 72 near the shore to around 52 near 5000 feet. Southeast winds up to 15 mph. Chance of rain 50 percent.

Central Maui

Tonight: Partly cloudy. Lows around 70. East winds up to 15 mph.

Tuesday: Mostly sunny. Breezy. Highs 83 to 89. Northeast winds up to 20 mph shifting to the east 10 to 20 mph in the afternoon.

Tuesday Night: Mostly cloudy. Breezy. Lows 68 to 73. East winds 10 to 20 mph decreasing to up to 15 mph after midnight.

Upcountry

Tonight: Partly cloudy. Isolated showers in the evening. Lows 44 to 54. East winds up to 10 mph. Chance of rain 20 percent.

Tuesday: Partly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 62 at the visitor center to around 70 at the summit. East winds up to 10 mph. Chance of rain 50 percent.

Tuesday Night: Mostly cloudy with isolated showers. Lows around 48 at the visitor center to around 50 at the summit. East winds up to 15 mph. Chance of rain 20 percent.

East Maui

Tonight: Partly cloudy. Isolated showers in the evening, then scattered showers after midnight. Lows around 72 near the shore to around 52 near 5000 feet. Southeast winds up to 15 mph. Chance of rain 50 percent.

Tuesday: Breezy. Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 79 to 85 near the shore to around 67 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Tuesday Night: Mostly cloudy with scattered showers. Lows around 72 near the shore to around 52 near 5000 feet. Southeast winds up to 15 mph. Chance of rain 50 percent.

Lanai City

Tonight: Partly cloudy. Scattered showers in the evening, then isolated showers after midnight. Lows 63 to 68. Northeast winds up to 10 mph in the evening becoming light. Chance of rain 30 percent.

Tuesday: Mostly sunny with isolated showers. Highs 73 to 80. Northeast winds up to 15 mph. Chance of rain 20 percent.

Tuesday Night: Mostly cloudy. Isolated showers in the evening. Lows 63 to 68. Northeast winds up to 15 mph. Chance of rain 20 percent.

Kaunakakai

Tonight: Partly cloudy. Isolated showers in the evening. Lows 59 to 73. East winds up to 15 mph increasing to 10 to 15 mph after midnight. Chance of rain 20 percent.

Tuesday: Mostly sunny. Breezy. Isolated showers in the morning. Highs 73 to 89. East winds 10 to 20 mph. Chance of rain 20 percent.

Tuesday Night: Mostly cloudy. Lows 60 to 74. East winds 10 to 15 mph.

Detailed Forecast

Synopsis

A trough to the west and a ridge to the northeast will drive moderate to fresh east southeast winds through Tuesday, then strengthen through the end of the week. Winds will focus clouds and showers across windward and mauka areas.

Discussion

A surface trough to the west and a ridge to the northeast will drive moderate to fresh east northeast winds across the state into Tuesday. Incoming clouds and scattered showers will impact windward and mauka areas. Stable, zonal flow aloft will keep showers light this week.
The trough will gradually weaken Wednesday through Friday with high pressure filling in north of the area. Trade winds across the islands will strengthen around midweek as the trough begins to fade. Trade winds will boost further this weekend. The rainfall pattern will follow the typical diurnal trends with higher shower coverage in the overnight to early morning hours, and then less shower activity during the mid morning through afternoon time period, and continue to favor windward and mauka areas through the forecast period.

Aviation

A trough to the northwest of the state will interact with the high to the far northeast, bringing light to moderate trades to the Hawaiian Islands through Tuesday. A hybrid sea breeze and trade wind pattern will persist over each island, with daytime sea breezes developing along terrain sheltered western mountain slopes. Downstream of each island, weak convergence will also bring the potential for more showers this afternoon and again tomorrow as the steering flow maintains a southeasterly component. Otherwise, brief passing showers are possible over windward and mountain areas with the trades, favoring the overnight to early morning hours. Outside of any brief showers, VFR conditions will prevail through Tuesday.
No AIRMETs are currently in effect this afternoon.

Marine

High pressure will remain centered far north-northeast of Hawaii over the next several days. A developing trough northwest of the state will briefly cause trade winds to veer out of the east-southeast into Tuesday. As the trough weakens and moves away later Tuesday, trades will strengthen into the moderate to locally strong range for the second half of this week. Small Craft Advisory conditions could return to the typical windy areas around Maui County and the Big Island as early as Wednesday. As the ridge strengthens, widespread fresh to strong trade winds are possible this weekend.
The current south-southwest (200 degrees) swell will continue to decline over the next couple of days. A small, moderate-period south- southwest swell (210 degrees) is possible Friday into the weekend.
Surf along east facing shores will remain moderate as the short- period north swell holds through Monday. Strengthening trade winds will gradually increase east shore waves during the second half of the week and through the weekend.
Pulses of small short-period energy out of the north will continue to move through Tuesday through the middle of the week to keep the north shore surf from going completely flat.

HFO Watches/Warnings/Advisories

None.

Data Courtesy of NOAA.gov