2-5 foot
1-3 foot
1-3 foot
1-3 foot


Fading north-northwest swell may still offer sets near head-high levels at the better exposed north shore breaks, but most areas will see smaller surf. Another small north-northwest swell should fill in Sunday but will most likely not reach much more than head-high levels at its peak. However, an upper trough and ample moisture will help sustain the active weather pattern affecting Hawai`i, likely ending by Saturday morning. Thunderstorms will bring a chance for heavy rains, reduced visibilities, strong gusty winds, lightning, and hail to some areas. Looking forward, an extra-large northwest swell is expected to arrive overnight Monday into Tuesday, peaking near or potentially exceeding warning levels into Wednesday. Tiny background swell may be found along select south shore breaks over the weekend, but don’t expect much. A small to moderate long-period south swell is expected to arrive Tuesday into Wednesday which may reach chest-high levels.

Hawaii Wave Height Model

Hawaii Swell Period Model
Hawaii Swell Height Model


Tide Predictions

High tide at Kahului was 1.7 foot at 3:31 AM late last night, dropping to a low of 0.0 foot at 9:49 AM this morning, then rising to a high of 1.9 foot at 4:27 PM late this afternoon, before once again dropping to a low of 0.6 foot at 10:26 PM late this evening

The sunrise was at 06:21 am this morning and will set at 06:40 pm this evening. The Moon is currently 17 days old, and is in a Waning Gibbous phase. The next Last Quarter will occur at 3:18 PM on Thursday, March 31st.

Hawaii Wind Report

Maui Weather

°/°
Wind: n/a at 0 mph
Sunrise:
Sunset:
current observations as of 6am October 20th, 2018

Weather Outlook for Saturday

A deep layered trough of low pressure will track eastward across the central and eastern part of the state through Saturday. An unstable airmass will accompany the trough and will bringing unsettled weather mainly for the Big Island through Saturday afternoon. A drier airmass will move back over the islands Saturday night through Sunday night. A weak cold front will push southeastward across the state Monday night through Tuesday night. Weak high pressure will build over the islands during the middle of next week, with a stronger area of high pressure expected to build north of the state late next week, finally allowing the trade winds to return.

Water vapor imagery shows a shortwave trough with over Oahu this evening. A surface-based trough is also located across the central portion of the state. Infrared satellite over Hawaii shows mostly cloudy to cloudy skies. Mid to high clouds cover from Molokai westward, while cumulus and layered clouds cover the eastern half. Radar shows stratiform rain over Maui, with the heavier showers and thunderstorms over the Alenuihaha channel and northwest Big Island. These weather features, along with the showers and thunderstorms are slowly moving to the east this evening. The main short term concerns for tonight revolve around the potential for flooding and thunderstorms for Maui and the Big Island. A flash flood watch is in effect through tonight for these two areas. There is the potential for snow showers on Mauna Kea through the overnight. The deepest moisture appears like it will pass by to the north of the Big Island, so we are not anticipating a need for a winter weather advisory at this time.

Across Kauai, Oahu and Molokai, the best forcing for ascent has shifted east so chances for rain and thunderstorms will be decreasing tonight. However, with the cold pool overhead, an isolated to widely scattered shower can’t be ruled out over these islands.

The eastward progression of the upper / surface trough will push the deeper layered moisture east of the Big Island on Saturday. While relatively drier air will advect eastward over the state on Saturday, there will still be enough available moisture which, combined with daytime heating and the unstable atmosphere provided by the upper trough, may cause some heavy showers and isolated thunderstorms Saturday afternoon.

Saturday night through Sunday night, a weak pressure pattern will remain over the island chain through the period, with overnight land breezes and daytime sea breezes expected. An increase in southwesterly winds is expected late Sunday night as a cold front begins to approach from the west. The deepest moisture will have shifted northeast and away from the state by Saturday evening, with the mid-level temperatures rebounding or warming closer to seasonal levels. As a result, we are expecting drier conditions to return to the island chain, with showers favoring the coastal waters during the night and the interior of the islands during the afternoon / evening hours.

Monday through next Friday, medium range guidance is in good agreement showing a weakening cold front approaching from the northwest on Monday, then pushing slowly through the island chain Monday night through Tuesday night. The moisture is expected to be rather shallow with little to no upper level forcing for ascent, so not much more than a broken line of showers is expected to move through the state in association with the front. Weak high pressure is then expected to build over or just north of the islands during the middle of next week, with an afternoon sea breezes and overnight land breezes expected. Both the 12Z GFS and 12Z ECMWF show a stronger ridge of high pressure building north of the state late next week, and this should allow the trade winds to return to the island chain by next Friday.

Central Valley (Kahului, Spreckelsville):

FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT. Occasional showers and thunderstorms in the evening, then isolated showers after midnight. Haze through the night. Locally heavy rainfall possible in the evening. Lows 60 to 65. Light winds. Chance of rain near 100 percent.

Leeward West (Lahaina, Ka`anapali):

FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT. Occasional showers and thunderstorms in the evening, then isolated showers after midnight. Haze through the night. Locally heavy rainfall possible in the evening. Lows 61 to 67. Light winds. Chance of rain near 100 percent.

Windward West (Wailuku, Waiehu):

FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT. Occasional showers and thunderstorms in the evening, then isolated showers after midnight. Haze through the night. Locally heavy rainfall possible in the evening. Lows 53 to 65. Light winds. Chance of rain near 100 percent.

Windard Haleakala (Hana, Haiku, Makawao):

FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT. Occasional showers and thunderstorms in the evening, then scattered showers and thunderstorms after midnight. Haze through the night. Locally heavy rainfall possible. Lows around 64 at the shore to around 47 at 5000 feet. Light winds. Chance of rain near 100 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT. Occasional showers and thunderstorms in the evening, then scattered thunderstorms and isolated showers after midnight. Haze through the night. Locally heavy rainfall possible in the evening. Lows around 63 at the shore to around 50 upcountry. Light winds. Chance of rain near 100 percent.

Haleakala Summit

FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT. Occasional showers and thunderstorms in the evening, then scattered showers and thunderstorms after midnight. Haze through the night. Locally heavy rainfall possible. Lows around 39 at the visitor center to around 35 at the summit. Light winds. Chance of rain near 100 percent.

Photo of the Day

Surf Photo of the Day - March 19th, 2016