3-5 foot
1-3 foot
0-3 foot
3-5 foot

High pressure north of the state will keep moderate to strong trade winds blowing across the marine area through Friday. A Small Craft Advisory is now in effect for the typically windy waters around Maui and the Big Island, as well as the windward waters of Maui County and Oahu through Wednesday. The SCA will likely need to be expanded to include more marine zones Monday night through late next week due to a series of northwest swells moving through the coastal waters building seas at or above the 10 foot SCA threshold.

The current northwest swell will continue to decline today and tonight. A new small northwest swell will build Monday, then peak well below advisory levels Monday night and Tuesday. A larger northwest swell will build Tuesday and Tuesday night, peaking at or near advisory levels Wednesday through Thursday.

Persistent moderate to strong trades will result in elevated surf along east facing shores through much of the upcoming week, with advisory level surf possible at times, particularly Tuesday through late next week.

Hawaii Wave Height Model

Tide Predictions

Low tide at Kahului was 1.13 foot at 2:00 PM early this afternoon, rising to a high of 1.74 foot at 2:00 PM early this afternoon, then dropping to a low of 0.19 foot at 2:00 PM early this afternoon, before once again rising to a high of 1.77 foot at 2:00 PM early this afternoon.

The sunrise was at 07:01 am this morning and will set at 05:56 pm this evening. The Moon is currently 23 days old, and is in a Last Quarter phase. The next Waning Crescent will occur at 1:29 AM on Sunday, January 6th.

Hawaii Wind Report

Maui Weather

°/°
Wind: n/a at 0 mph
Sunrise:
Sunset:
current observations as of 8pm July 16th, 2019

Weather Outlook for Sunday, 30th December 2018

Summary

High clouds will gradually diminish, and stable conditions will develop today as an upper level low southwest of the islands weakens and moves away. Locally breezy trade winds will persist, focusing clouds and showers over windward slopes. A rather dry, stable, and breezy trade wind flow will dominate through Friday, leading to light windward rainfall and dry conditions leeward. Trade winds may diminish next weekend.

Detailed Discussion

Stable conditions are returning as trades hold firm. A weakening upper low, now centered nearly 600 miles southwest of Kauai, is moving moving away from the islands. This feature will continue to send high clouds the state, though coverage will diminish from north to south today as a mid to upper level ridge to the north of the islands builds southward. This building ridge aloft will bring increasingly stable conditions and will produce a strengthening low level inversion. Surface high pressure north of the state will maintain a moderate to locally breezy trade wind flow. Decreasing moisture in the trades and increasing stability will lead to modest rainfall over windward slopes, though a few showers may spread to leeward areas.

Stable, breezy, and rather dry trade wind weather is expected as we head into the new year. By Monday, the ridge aloft will settle overhead, producing a strong trade wind inversion in the 4,000 to 6,000 foot range, and precipitable water values drop below normal to an inch or less. This will lead to modest shower activity over windward slopes and dry conditions leeward. A surface ridge north of the state will drive breezy to perhaps windy trades through Friday.

Heading into next weekend, the GFS and ECMWF are hinting at a decrease in or possible disruption of the trade winds. The ridge aloft should hold, so a significant increase in rainfall appears unlikely.

Central Valley (Kahului, Spreckelsville):

Partly cloudy. Breezy. Lows 64 to 69. East winds 10 to 20 mph.

Leeward West (Lahaina, Ka`anapali):

Breezy. Partly cloudy with isolated showers. Lows 65 to 70. East winds 15 to 20 mph. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

Breezy. Mostly cloudy with scattered showers. Lows 59 to 70. East winds 15 to 20 mph. Chance of rain 50 percent.

Windard Haleakala (Hana, Haiku, Makawao):

Breezy. Mostly cloudy with scattered showers. Lows around 69 at the shore to around 54 at 5000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Mostly cloudy in the evening then becoming partly cloudy. Breezy. Lows around 68 at the shore to around 56 upcountry. East winds up to 20 mph.

Haleakala Summit

Mostly cloudy in the evening then becoming partly cloudy. Breezy. Lows around 50 at the visitor center to around 45 at the summit. East winds 10 to 25 mph increasing to 20 to 25 mph after midnight. Gusts up to 45 mph.