West Side

Today: Sunny. Isolated showers in the afternoon. Highs 78 to 86. Northeast winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly clear. Breezy. Lows 67 to 73. Northeast winds up to 15 mph increasing to 10 to 20 mph after midnight.

Sunday: Breezy. Sunny with isolated showers. Highs 78 to 86. Northeast winds up to 20 mph. Gusts up to 40 mph in the morning. Chance of rain 20 percent.

South Side

Today: Sunny and breezy. Isolated showers in the afternoon. Highs 85 to 90. North winds up to 20 mph increasing to 10 to 20 mph in the afternoon. Chance of rain 20 percent.

Tonight: Clear and breezy. Lows 63 to 76. North winds up to 20 mph shifting to the northeast 10 to 20 mph after midnight.

Sunday: Sunny and breezy. Highs 85 to 90. Northeast winds up to 25 mph shifting to the north 10 to 25 mph in the afternoon.

North Shore

Today: Breezy. Mostly sunny with isolated showers in the morning, then partly sunny with scattered showers in the afternoon. Highs around 81 near the shore to around 66 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Breezy. Scattered showers. Lows 67 to 74 near the shore to around 54 near 5000 feet. East winds up to 20 mph. Chance of rain 40 percent.

Sunday: Partly sunny in the morning then becoming mostly sunny. Breezy. Scattered showers. Highs around 81 near the shore to around 66 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Central Maui

Today: Sunny and breezy. Isolated showers in the afternoon. Highs 81 to 87. Northeast winds up to 20 mph. Chance of rain 20 percent.

Tonight: Mostly clear. Breezy. Lows 63 to 68. Northeast winds 10 to 20 mph.

Sunday: Sunny and breezy. Highs 81 to 87. Northeast winds up to 20 mph.

Upcountry

Today: Mostly sunny with isolated showers. Highs around 65 at the visitor center to around 71 at the summit. Northeast winds up to 10 mph. Chance of rain 20 percent.

Tonight: Mostly clear with isolated showers. Lows around 48 at the visitor center to around 50 at the summit. Northeast winds up to 15 mph. Chance of rain 20 percent.

Sunday: Sunny with isolated showers. Highs around 64 at the visitor center to around 71 at the summit. East winds up to 15 mph shifting to the northeast in the afternoon. Chance of rain 20 percent.

East Maui

Today: Breezy. Mostly sunny with isolated showers in the morning, then partly sunny with scattered showers in the afternoon. Highs around 81 near the shore to around 66 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Breezy. Scattered showers. Lows 67 to 74 near the shore to around 54 near 5000 feet. East winds up to 20 mph. Chance of rain 40 percent.

Sunday: Partly sunny in the morning then becoming mostly sunny. Breezy. Scattered showers. Highs around 81 near the shore to around 66 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Lanai City

Today: Sunny and breezy. Isolated showers in the afternoon. Highs 73 to 81. Northeast winds up to 20 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 20 percent.

Tonight: Clear and windy. Lows 63 to 68. Northeast winds 15 to 30 mph. Gusts up to 50 mph after midnight.

Sunday: Sunny and windy. Highs 72 to 81. Northeast winds 10 to 30 mph.

Kaunakakai

Today: Sunny and breezy. Isolated showers in the afternoon. Highs 70 to 89. East winds up to 20 mph. Chance of rain 20 percent.

Tonight: Mostly clear. Breezy. Lows 59 to 74. Northeast winds up to 20 mph increasing to 10 to 25 mph after midnight.

Sunday: Sunny and windy. Highs 69 to 89. Northeast winds up to 30 mph.

Detailed Forecast

Synopsis

A drier air mass with lower humidity, sunny skies and light to moderate winds expected through Sunday. Isolated showers possible windward and mauka spots. Winds should decrease early next week allowing land and sea breezes to develop.

Discussion

Looking at satellite and radar imagery this morning, isolated showers are ongoing along windward and mauka spots across the state. High pressure is expected to build back over the state dropping humidity levels and ushering in sunny skies through Sunday.
Early next week, trades will weaken in response to an approaching surface trough and then will weaken further heading into midweek as broad troughing develops northwest of the state. In this lighter flow, land and sea breezes will develop with clearing expected overnight and clouds and a few showers over leeward and interior areas each afternoon.

Aviation

The high pressure ridge will build back over the Hawaii region with drier easterly trade wind weather returning just in time for the weekend. Lower humidity levels and mostly sunny skies will prevail through Sunday.
No AIRMETs in effect.

Marine

Gentle to fresh east to northeast trade winds fill back in today as Hurricane Nolo accelerates westward away from the Hawaiian Islands and high pressure strengthens gradually to the north. A Small Craft Advisory has been issued, in effect beginning tonight, when locally strong trades are forecast to develop for the typically windy waters and channels. Locally strong trades may persist into early next week before high pressure to the north weakens again and winds start to diminish. By the middle of next week, troughing developing northwest of the islands may cause winds to veer out of the southeast once again.
A small background south swell will surf mostly steady along south facing shores through the weekend. A new small, long-period south swell, originating from a large fetch of gale force winds southeast of New Zealand earlier this week, is forecast to arrive beginning Sunday and peak Monday through Wednesday. This will push surf to slightly above seasonal averages for the first half of next week.
A small bump in surf along north-facing shores will decrease today as a small, short period north swell fades. Another small bump in north shore surf is possible early next week as a small, medium-period northwest swell arrives late Sunday and peaks on Monday. This will be followed by a slightly larger long-period northwest swell peaking on Wednesday, giving a good boost to north shore surf for mid-week. Surf along east facing shores will increase and become more choppy through tonight as easterly trades build back into the region.

Fire weather

Drier air is expected over the weekend as light to moderate east- northeasterly trades return. Winds are expected to decrease early to midweek. Isolated showers will favor windward and mauka areas overnight into the early morning hours. Fire weather conditions will remain below critical threshold this week for both wind and humidity levels. Temperature inversion heights are around 5000-7000ft.

HFO Watches/Warnings/Advisories

Small Craft Advisory from 6 PM this evening to 6 PM HST Sunday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.

Data Courtesy of NOAA.gov