1-3 foot
1-3 foot
0-2 foot
3-5 foot

A surface high far northeast of the area is producing locally strong trade winds. A Small Craft Advisory remains in effect through Saturday night for strong trade winds across the typically windy waters adjacent to the islands of Maui County and the Big Island. The trades will gradually weaken from Sunday through Memorial Day as an upper-level trough approaches from the northwest, and induces a weak surface trough in the vicinity of the islands. The trade winds are expected to strengthen again some time after Memorial Day as the trough moves west and fills, while a new surface high builds north of the area. Assuming this scenario occurs, a SCA may be required for the typically windy waters adjacent to the islands of Maui County and the Big Island starting Tuesday or Wednesday.

Surf is forecast to remain below the High Surf Advisory criteria along all shorelines across the state into the middle of next week. A series of swells from the Tasman Sea will maintain surf near the summertime average along south facing shores through Memorial Day. Surf is expected to build to above-average heights along south facing shores starting around the middle of next week. Rough surf along east facing shores will subside early next week as the trade winds weaken, then build again by mid-week. A small northwest swell will maintain tiny surf along most north and west facing shores of the smaller islands into early next week.

Hawaii Wave Height Model

Tide Predictions

Low tide at Kahului was -0.22 foot at 2:00 PM early this afternoon, rising to a high of 2.12 foot at 2:00 PM early this afternoon, then dropping to a low of 0.70 foot at 2:00 PM early this afternoon.

The sunrise was at 05:43 am this morning and will set at 07:02 pm this evening. The Moon is currently 12 days old, and is in a Waxing Gibbous phase. The next Full Moon will occur at 2:20 PM on Tuesday, May 29th.

Hawaii Wind Report

Maui Weather

°/°
Wind: n/a at 0 mph
Sunrise:
Sunset:
current observations as of 8am August 21st, 2018

Weather Outlook for Saturday, 26th May 2018

Summary

A breezy trade wind weather pattern can be expected through Sunday, with lighter trade winds early next week. An area of low clouds and showers is expected overnight and Saturday, making for damp windward conditions. While some decrease in showers is expected Saturday night and Sunday, a developing upper-level low may bring wetter conditions on Monday and Tuesday. High clouds are expected to continue over the islands for the next several days.

Detailed Discussion

Persistent high pressure to the NE and N of the islands will support locally breezy trade winds for most of the forecast period, but a weak low-level trough near the islands early next week may lead to a short-lived weakening and veering of the low-level flow, with winds potentially shifting to the ESE/SE. The trough is expected to develop in response to a low aloft that is expected to graze the island chain before drifting away to the W. The proximity of the low may lead to an increase in shower coverage and intensity – mainly on Memorial Day and Tuesday, while the veering of the low-level winds may affect the movement of the plumes of steam, ash and gases emanating from the Big Island’s active volcano.

A mid-level ridge over the islands continues to support a subsidence inversion near 8000 feet or so, thereby capping the incoming low- level moisture, which is expected to be on the increase overnight. So, despite the stability, a somewhat showery trade wind weather pattern is expected through Saturday as diffuse remnants of an old front caught in the trade flow fuel an increase in moisture. The mid- level ridge will remain in place through Sunday, with fewer windward showers expected Saturday night and Sunday.

On Monday and Tuesday, a mid-level low is expected to form within a persistent trough aloft to the NW of the islands, and then gradually drift W/SW, with some significant differences between model solutions. As this occurs, atmospheric instability will increase as moisture increases, bringing the potential for some heavier rainfall. Confidence remains low, but is increasing somewhat as models have been consistent with this general evolution for the last couple of days. By Wednesday, the low aloft is forecast to gradually move W away from the state as high pressure builds N of the area, with a more typical trade wind weather pattern returning for the remainder of next week.

An ongoing Special Weather Statement will be updated shortly to highlight the ongoing ashfall (and potential for more) across portions of the Big Island’s Kau district. Multiple small eruptions of ash from Kilauea have been observed over the past day, with the most recent just a few hours ago. This activity is generally expected to continue, with the potential for even stronger explosions. We continue to vigilantly monitor radar data from PHWA, which is one of the best tools we have for ash detection during cloudy nighttime conditions.

Central Valley (Kahului, Spreckelsville):

Breezy. Mostly cloudy with isolated showers in the morning, then mostly sunny in the afternoon. Highs 80 to 86. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Leeward West (Lahaina, Ka`anapali):

Breezy. Mostly cloudy with scattered showers in the morning, then mostly sunny in the afternoon. Highs 76 to 84. Northeast winds 15 to 20 mph. Chance of rain 40 percent.

Windward West (Wailuku, Waiehu):

Partly sunny. Breezy. Showers likely in the morning, then isolated showers in the afternoon. Highs 62 to 81. Northeast winds 10 to 20 mph. Chance of rain 70 percent.

Windard Haleakala (Hana, Haiku, Makawao):

Partly sunny. Breezy. Showers likely in the morning, then isolated showers in the afternoon. Highs around 78 at the shore to around 64 at 5000 feet. East winds 10 to 20 mph. Chance of rain 70 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Partly sunny. Highs around 85 at the shore to 67 to 72 upcountry. East winds 10 to 15 mph shifting to the northwest in the afternoon. Gusts up to 45 mph.

Haleakala Summit

Breezy. Mostly cloudy with scattered showers in the morning, then mostly sunny in the afternoon. Highs around 62 at the visitor center to around 64 at the summit. East winds 10 to 25 mph. Chance of rain 40 percent.

Photo of the Day