West Side

Today: Mostly sunny. Breezy. Isolated showers in the morning. Haze through the day. Highs 81 to 86. East winds up to 20 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 20 percent.

Tonight: Partly cloudy. Breezy. Isolated showers in the evening. Lows 68 to 76. East winds 15 to 25 mph. Chance of rain 20 percent.

Sunday: Mostly sunny. Windy. Isolated showers in the afternoon. Highs 81 to 86. Northeast winds 10 to 30 mph. Chance of rain 20 percent.

South Side

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

Tonight: Partly cloudy. Breezy. Lows 69 to 76. Northeast winds up to 20 mph.

Sunday: Mostly sunny. Breezy. Highs around 89. Northeast winds up to 25 mph increasing to 10 to 25 mph in the afternoon.

North Shore

Today: Breezy. Partly sunny with scattered showers. Haze. Highs 79 to 85 near the shore to around 69 near 5000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Tonight: Breezy. Mostly cloudy with scattered showers. Lows around 72 near the shore to around 53 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Sunday: Mostly sunny in the morning then becoming partly sunny. Breezy. Scattered showers. Highs 79 to 85 near the shore to around 68 near 5000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Central Maui

Today: Mostly sunny. Breezy and haze. Highs 83 to 91. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon.

Tonight: Partly cloudy. Breezy. Lows 69 to 74. East winds 10 to 25 mph.

Sunday: Mostly sunny. Windy. Isolated showers in the afternoon. Highs 81 to 89. Northeast winds 10 to 30 mph. Chance of rain 20 percent.

Upcountry

Today: Breezy. Mostly sunny with isolated showers in the morning, then partly sunny in the afternoon. Haze through the day. Highs around 68 at the visitor center to around 72 at the summit. Southeast winds up to 25 mph. Chance of rain 20 percent.

Tonight: Partly cloudy. Breezy. Isolated showers in the evening. Lows around 52 at the visitor center to around 49 at the summit. East winds 10 to 25 mph decreasing to up to 25 mph after midnight. Chance of rain 20 percent.

Sunday: Breezy. Mostly sunny with isolated showers. Highs around 66 at the visitor center to around 70 at the summit. East winds up to 25 mph shifting to the northeast 10 to 25 mph in the afternoon. Chance of rain 20 percent.

East Maui

Today: Breezy. Partly sunny with scattered showers. Haze. Highs 79 to 85 near the shore to around 69 near 5000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Tonight: Breezy. Mostly cloudy with scattered showers. Lows around 72 near the shore to around 53 near 5000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Sunday: Mostly sunny in the morning then becoming partly sunny. Breezy. Scattered showers. Highs 79 to 85 near the shore to around 68 near 5000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Lanai City

Today: Mostly sunny in the morning then becoming partly sunny. Haze. Highs 73 to 81. Northeast winds up to 15 mph.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Breezy and haze. Lows around 66. Northeast winds 10 to 20 mph.

Sunday: Mostly sunny. Windy. Isolated showers in the afternoon. Highs 73 to 81. Northeast winds 10 to 30 mph. Chance of rain 20 percent.

Kaunakakai

Today: Mostly sunny. Breezy and haze. Highs 72 to 89. East winds 10 to 20 mph.

Tonight: Partly cloudy. Breezy and haze. Lows 61 to 74. East winds 15 to 25 mph.

Sunday: Mostly sunny. Breezy. Isolated showers in the afternoon. Highs 73 to 89. Northeast winds 15 to 25 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

High pressure remains quasi-stationary northeast of the islands through the next several days. Trades will increase as a result, along with the escort of a drier, more stable airmass limiting cloud and shower activity. A more typical trades weather pattern will return early next week, along with the reintroduction of periodic showers and moderate to locally breezy trades.

Discussion

High pressure will remain quasi-stationary well northeast of the islands and is progged to build over the weekend and strengthen the local pressure gradient, resulting in trades increasing to breezy levels across much of the state. Latest observations continue to show an array of westward moving cumulus clouds upstream of the Hawaiian islands in association with these trades, a telltale sign of a much drier and stable airmass is propagating into the region.
This airmass will hinder any cloud or shower development and will aid in lowering relative humidity. While not quite at red flag criteria, these factors do pose a risk for fire weather concerns, particularly on Sunday, and something that should be closely monitored going forward. Regardless to whether RH values meet criteria, it is urged that everyone remains mindful of activities that could produce a spark when working or recreating outdoors.
Latest model guidance of the GFS and Euro supports a weak low- level trough embedded within the southwestern portion of the high pressure passing over the islands early this afternoon; however, being a brief feature, it does not seem to have a strong impact to the islands. At most, expect a modest increase in clouds and windward showers to the smaller islands despite the finite amount of moisture available.
While the aforementioned high pressure will remain well northeast of the islands through much of next week; model guidance showcases it will begin to weaken by Monday. Trades will continue to be supported, but at a more moderate to locally breezy level, and periodic showers and clouds will return throughout the remainder of the forecast period, predominately across windward and mauka vicinities.

Aviation

High pressure well northeast of the islands will result in breezy trades prevailing through the weekend. Expect limited shower activity across the islands under a drier, more stable airmass. Thereafter, trades will decrease back to more moderate to locally breezy levels and transition to wetter conditions.
No AIRMETs are currently in effect.

Marine

High pressure far northeast of Hawaii will remain nearly stationary over the next several days. This feature will help drive moderate to locally strong trades today, increasing to fresh to strong tonight into Sunday. Trades will ease slightly by early next week as the high begins to weaken. The Small Craft Advisory (SCA) for typically windier waters and channels near Maui and the Big Island remains in effect through this afternoon. However, the SCA will certainly need to be extended in time and expanded to cover additional zones tonight through Sunday.
Small, medium period, south swell will maintain below average surf along south facing shores this weekend. By Monday, a moderate, long period south swell (190) will begin filling in across the local waters. This swell is expected to peak Tuesday, then slowly ease through mid-week. Surf may approach High Surf Criteria during the peak of the swell.
Rough and choppy conditions will continue along east facing shores, especially on Sunday as trades strengthen. Surf will remain very small along north and west facing shores through the forecast period.

HFO Watches/Warnings/Advisories

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

Data Courtesy of NOAA.gov