5-8+ foot
3-5+ foot
1-4 foot
2-4 foot

Light northerly winds associated with a weak ridge of high pressure in the area will continue today, then quickly shift from the northeast tonight to the south Sunday as a front approaches. The flow will remain light enough for localized land and sea breeze conditions near the coasts to continue through the weekend. The front will make it into the area Monday, then diminish. Moderate to fresh northeast trades will return Tuesday through midweek as high pressure builds to the north.

Seas are holding near advisory levels this morning based on the latest buoy and satellite data due to a north-northwest swell. An altimeter pass over the Oahu waters confirmed this showing seas up to around 9 ft earlier. Seas will hold at these levels through the weekend as a new long-period west-northwest swell builds down the island chain today. Buoy 51101 and 51001 are already reflecting this new energy within the 19 and 21 second bands early this morning. If this source comes in higher than predicted a small craft advisory may be needed due to seas.

Surf along north and west facing shores will remain up through Sunday due to a combination of a fading north-northwest swell and the new west-northwest swell arriving today. Heights should hold below advisory levels through Sunday.

Overlapping reinforcements expected Monday through Tuesday out of the northwest will keep the surf up along north and west facing shores. Heights may near advisory levels Monday night through Tuesday. A gradual downward trend will be possible Wednesday through Thursday. The next reinforcement will be possible Thursday night from a distant gale modeled to develop off the Kurils Sunday and Sunday night.

Surf along south facing shores will lower through the weekend as the early season small south swell that filled in a couple of days ago eases. Small surf will continue each day through next week with mainly background south swells moving through.

Hawaii Wave Height Model

Tide Predictions

The sunrise was at 06:18 am this morning and will set at 06:41 pm this evening. The Moon is currently 24 days old, and is in a Waning Crescent phase. The next New Moon will occur at 8:52 AM on Friday, April 5th.

Maui Weather

°/°
Wind: n/a at 0 mph
Sunrise:
Sunset:
current observations as of 6pm April 20th, 2019

Weather Outlook for Saturday, 30th March 2019

Summary

Light north winds will become variable today into early next week. A surface trough will move over the Big Island from the southeast late tonight into Sunday, introducing wet weather to the eastern part of the state Sunday and Monday. A high will build northwest of the area Tuesday, heralding a return to trade flow.

Detailed Discussion

The cloudy remnants of a dissipated frontal boundary remain across the state this morning. Satellite loop shows broken to overcast low clouds across windward Oahu and most of Maui County, with scattered to patchy broken low clouds elsewhere. Light north to northwest winds have pushed as far south as Moloka`i, with light and variable winds noted farther to the east. Overnight soundings show rather low PW statewide, in the 0.8 to 1.1 inch range, with a solid inversion base between 6900 feet above Hilo to 4500 feet above Lihue. Radar shows only isolated to scattered light showers, mainly along and adjacent to windward shores of Maui.

A ridge to our northwest is forecast to approach the state through today, resulting in light and variable wind flow. Expect local land and sea breezes for the next few days, with an associated increase in afternoon and early evening cloud cover across mauka areas. Clearing will occur each night.

A surface trough east of the Big Island may enhance showers tonight through Monday night across the Big Island, and potentially across Maui Monday and Monday night. The trough will reach the Big Island tonight before stalling. This trough will bring clouds and showers across most of the Big Island through the weekend. Showers will focus across windward and southeast sections. The smaller islands should remain under a drier land and sea breeze pattern on Sunday.

An upper trough and an associated front will approach the main Hawaiian Islands from the northwest through the weekend. This upper trough will likely produce strong winds and cold temperatures over the Big Island summits, and the Wind Advisory (or potential wind warning) could be extended into early next week. Snow or ice will be possible over the summits. The front is expected to weaken as it moves over Kauai on Monday. A new surface high will move east behind the front by Tuesday and herald a return to trade flow.

Central Valley (Kahului, Spreckelsville):

Partly cloudy with isolated showers. Lows around 62. Northeast winds up to 10 mph in the evening becoming light. Chance of rain 20 percent.

Leeward West (Lahaina, Ka`anapali):

Mostly cloudy in the evening then becoming partly cloudy. Isolated showers. Lows 59 to 65. Light winds. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

Mostly cloudy in the evening then becoming partly cloudy. Isolated showers. Lows 51 to 64. Light winds becoming east up to 10 mph after midnight. Chance of rain 20 percent.

Windard Haleakala (Hana, Haiku, Makawao):

Partly cloudy with isolated showers. Lows around 64 at the shore to around 47 at 5000 feet. Southeast winds up to 10 mph. Chance of rain 20 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Partly cloudy. Isolated showers after midnight. Lows around 62 at the shore to around 49 upcountry. Light winds becoming southeast up to 10 mph after midnight. Chance of rain 20 percent.

Haleakala Summit

Mostly clear. Isolated rain showers after midnight. Lows around 40 at the visitor center to around 35 at the summit. Southwest winds 10 to 15 mph. Chance of rain 20 percent.