8-12+ foot
4-6+ foot
1-3+ foot
2-4+ foot

Long-period forerunners from a new northwest swell have hit the NOAA buoys 51001 and 51101 last evening and continued to move southeastward toward the island chain through the night. Surf is expected to begin building over exposed north and west facing shores overnight Monday, reaching advisory levels around daybreak Tuesday. Surf will continue to rise through the day Tuesday and likely reach warning levels by late in the afternoon. Surf is expected to peak Tuesday night through Wednesday, then gradually lower through the rest of the week. The peak of the surf is expected to occur near the peak of the spring high tides during the pre-dawn hours on Wednesday, giving way to above average coastal wave run-up.

A High Surf Warning remains in effect for exposed north and west facing shores from midnight tonight through Tuesday night. A High Surf Advisory remains in effect for north facing shores of the Big Island from 6 AM Tuesday through Tuesday night. These headlines may eventually need to be extended through Wednesday. A SCA remains in effect for all Hawaiian waters for winds, seas or a combination of the two through Wednesday. The SCA will likely need to be extended for much of the marine area through Thursday.

Light to moderate trades will hold in place through early Tuesday as a cold front approaches the state from the northwest. The cold front will sweep through Kauai Tuesday afternoon, through Oahu and Maui County Tuesday night, then hang up in the vicinity of the Big Island on Wednesday. Strong northerly winds will fill in along and behind the front, bringing solid Small Craft Advisory level winds to all marine zones, and potentially a brief period of Gales to the Alenuihaha channel. High pressure will build eastward well to the north of the islands Wednesday through early next week, with strong winds returning to a more typical east- northeasterly trade winds direction late Wednesday and Wednesday night. Moderate to locally strong trades will then continue Thursday through early next week.

Surf is expected to drop below the winter time average along north and west facing shores for the latter part of the week, and on into the weekend. A small to moderate northwest swell will be possible early next week.

Hawaii Wave Height Model

Tide Predictions

High tide at Kahului was 1.88 foot at 2:00 PM early this afternoon, dropping to a low of 1.11 foot at 2:00 PM early this afternoon, then rising to a high of 1.66 foot at 2:00 PM early this afternoon, before once again dropping to a low of -0.04 foot at 2:00 PM early this afternoon.

The sunrise was at 06:55 am this morning and will set at 05:50 pm this evening. The Moon is currently 10 days old, and is in a Waxing Gibbous phase. The next Full Moon will occur at 5:50 PM on Saturday, December 22nd.

Hawaii Wind Report

Maui Weather

°/°
Wind: n/a at 0 mph
Sunrise:
Sunset:
current observations as of 8am March 26th, 2019

Weather Outlook for Tuesday, 18th December 2018

Summary

Dry and pleasant conditions will hold into Tuesday. Trade winds will continue to trend down, potentially enough for land and sea breezes late tonight through Tuesday for portions of the state as a weak cold front approaches and moves into the area. The front is forecast to quickly advance down the island chain late Tuesday through Wednesday, bringing increasing rain chances. Gusty northerly winds along with drier and cooler conditions will follow Tuesday night through Thursday. A return of a more typical trade wind pattern will be possible Friday into the upcoming weekend.

Detailed Discussion

Short-term (through Thursday) guidance remains in good agreement and reflects the dry and pleasant pattern continuing into Tuesday. Precipitable water values are forecast to hold below average for this time of year through a good portion of the day tomorrow, ranging from three quarters of an inch to around an inch. After a long stretch of breezy to windy trades, the pressure gradient has relaxed over the state in response to a weak cold front and upper trough approaching from the northwest. Trades have responded and trended down into the light to moderate range this evening based on recent observations. Expect this downward trend to continue overnight, potentially becoming weak enough for localized land/sea breezes through Tuesday for much of the state.

The cold front is forecast to advance down the island chain beginning later in the day Tuesday for Kauai, then stall around the Big Island Wednesday night into Thursday. A slight increase in moisture (albeit shallow) combined with this boundary and upper trough will support a band of clouds and increasing rain chances late Tuesday through Wednesday as the boundary moves down the island chain, mostly over the northern and windward sides of the islands. Rain chances will likely remain up over the Big Island through Thursday as the boundary hangs up and gradually diminishes.

Gusty northerly winds along with much drier and cooler conditions will follow the frontal passage Tuesday night through Thursday. Wind advisory criteria being exceeded for the typically windier areas exposed to northerly winds can’t be ruled out, mainly Tuesday night through Wednesday. Dewpoints are forecast to dip into the upper 50s for portions of the state. High temperatures may struggle to reach the 80 deg mark Wednesday afternoon.

For the extended (Friday through the weekend), guidance supports a return of a more typical trade wind pattern by the weekend with clouds/showers focusing over windward areas.

Central Valley (Kahului, Spreckelsville):

HIGH SURF WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM HST WEDNESDAY. Mostly clear. Lows 58 to 63. Northeast winds up to 15 mph.

Leeward West (Lahaina, Ka`anapali):

Sunny. Isolated showers in the afternoon. Highs 74 to 81. East winds up to 10 mph shifting to the northeast in the afternoon. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

HIGH SURF WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM HST WEDNESDAY. Partly cloudy with isolated showers. Lows 53 to 64. East winds up to 15 mph. Chance of rain 20 percent.

Windard Haleakala (Hana, Haiku, Makawao):

HIGH SURF WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM HST WEDNESDAY. Partly cloudy. Isolated showers in the evening, then scattered showers after midnight. Lows 61 to 66 at the shore to around 52 at 5000 feet. South winds up to 15 mph. Chance of rain 30 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Sunny. Isolated showers in the afternoon. Highs around 84 at the shore to 61 to 73 upcountry. Light winds becoming northwest up to 15 mph in the afternoon. Chance of rain 20 percent.

Haleakala Summit

Sunny and breezy. Isolated showers in the afternoon. Highs 50 to 61. Northwest winds up to 20 mph. Chance of rain 20 percent.