0-2 foot
0-2 foot
0-3 foot
1-3 foot

High pressure far north of the islands will maintain moderate to breezy trade winds through the middle of the week. A Small Craft Advisory remains posted through Monday afternoon for the typically windier waters near Maui County and the Big Island. With breezy trades expected to continue beyond that, expect the SCA to be extended. Additional areas may need to be added to the SCA later in the week as the high pressure strengthens.

Small, choppy breakers will continue along east facing shores through Monday. An uptick of trade winds during the middle of the week is expected bring an increase in wind swell to east facing shores. Small southeast and south swells will maintain small background surf along south facing shores through the week. Otherwise, no significant swells are expected.

Hawaii Wave Height Model

Tide Predictions

High tide at Kahului was 1.44 foot at 2:00 PM early this afternoon, dropping to a low of -0.16 foot at 2:00 PM early this afternoon, then rising to a high of 2.53 foot at 2:00 PM early this afternoon, before once again dropping to a low of 0.69 foot at 2:00 PM early this afternoon.

The sunrise was at 05:58 am this morning and will set at 07:06 pm this evening. The Moon is currently 16 days old, and is in a Waning Gibbous phase. The next Last Quarter will occur at 6:19 PM on Saturday, August 4th.

Hawaii Wind Report

Maui Weather

°/°
Wind: n/a at 0 mph
Sunrise:
Sunset:
current observations as of 8am August 20th, 2018

Weather Outlook for Sunday, 29th July 2018

Summary

High pressure north of the state will keep moderate trade winds in place through Tuesday, with breezy conditions then expected to develop Tuesday night and continue through late in the week. Fairly typical trade wind weather should prevail, with an increase in shower coverage and intensity expected tonight through Tuesday as a weak disturbance moves through the island chain. Showers will continue to favor windward and mauka areas, with a stray shower reaching leeward locales from time to time.

Detailed Discussion

Currently at the surface, a 1031 mb high is located around 1800 miles north-northeast of Honolulu, with the ridge axis extending southwestward from the high to a location around 775 miles north of Kauai. The resulting pressure gradient between the ridge of high pressure north of the state and the Intertropical Convergence Zone (ITCZ) to the south is driving moderate trade winds across the island chain early this morning. Infrared satellite imagery shows quite a bit of mid and upper level cloud cover moving through the area, resulting in partly to mostly cloudy skies statewide. Radar imagery shows scattered to numerous showers moving into windward areas, with a few showers occasionally drifting into leeward locales. Main short term concerns revolve around rain chances and fluctuations in the trade wind speeds over the next few days.

The area of high pressure around 45N 143W early this morning, will strengthen slightly as it drops southwestward over the next few days, reaching a location near 40N 147W by Tuesday morning. Meanwhile, Tropical Depression Gilma is expected to weaken into a post tropical remnant low later today as it tracks steadily westward, with the remnant low then continuing to push westward or west-southwestward along 16N through Tuesday. This should keep a moderate trade wind flow in place across the island chain. The surface high will then strengthen north-northwest of the state Tuesday night and Wednesday, while the remnant low opens up into a trough as it pushes westward or west-southwestward roughly along 15N and approaches the longitude due south of the Big Island by late Wednesday afternoon. This should result in an increase in the trade winds speeds across the island chain late Tuesday, with moderate to breezy trade winds then expected Tuesday night through late in the week.

As for sensible weather details, a fairly typical trade wind shower pattern is expected today. Shower coverage and intensity should then increase tonight through Tuesday as precipitable waters values rise into the 1.6 to 1.9 inch range ahead of the returning breezy trade winds. A more typical trade wind shower pattern will then likely return Tuesday night through late in the week, although there are some differences in the handling of the moisture associated with the remnant low passing by to the south of the state during the middle of the week, and the degree of destabilization that occurs due to lowering upper level heights northwest of the islands late in the week. Showers will favor windward and mauka areas through the period, with a few showers reaching leeward locales from time to time, particularly tonight through Tuesday when precipitable waters values will be running well above normal.

Central Valley (Kahului, Spreckelsville):

Partly cloudy in the evening, then mostly cloudy with isolated showers after midnight. Lows 69 to 75. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Leeward West (Lahaina, Ka`anapali):

Partly cloudy with isolated showers in the evening, then mostly cloudy with scattered showers after midnight. Lows 70 to 77. East winds 10 to 15 mph. Chance of rain 50 percent.

Windward West (Wailuku, Waiehu):

Mostly cloudy. Scattered showers in the evening, then frequent showers after midnight. Lows 62 to 74. East winds 10 to 15 mph. Chance of rain 90 percent.

Windard Haleakala (Hana, Haiku, Makawao):

Mostly cloudy. Scattered showers in the evening, then frequent showers after midnight. Lows around 72 at the shore to around 56 at 5000 feet. East winds 10 to 15 mph. Chance of rain 90 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Partly cloudy with isolated showers. Lows around 72 at the shore to 56 to 61 upcountry. South winds up to 10 mph early in the evening becoming light, then becoming east up to 10 mph after midnight. Gusts up to 30 mph. Chance of rain 20 percent.

Haleakala Summit

Breezy. Partly cloudy with scattered showers. Lows around 50 at the visitor center to around 46 at the summit. East winds 15 to 25 mph. Chance of rain 50 percent.

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