2-4 foot
0-2 foot
0-2 foot
1-3 foot

A trough near Kauai will weaken and move off to the west tonight. Meanwhile, a strong 1030 mb surface high about 1300 nm northwest of Kauai will move east at 20 kt. Northeast trade winds will strengthen tonight, reaching the 25 kt Small Craft Advisory threshold on Saturday in the windy areas around the Big Island and Maui. A SCA is in effect starting early Saturday morning. The high will maintain trade winds through next week as it continues moving east, and the trades will be locally strong through at least the weekend.

Surf is expected to remain below the High Surf Advisory levels along all shores through at least the middle of next week. Moderate northwest swells will peak Saturday and Monday. A swell from the southern hemisphere is expected to arrive on Sunday, gradually build through Tuesday, then slowly subside.

Hawaii Wave Height Model

Tide Predictions

High tide at Kahului was 1.82 foot at 2:00 PM early this afternoon, dropping to a low of -0.10 foot at 2:00 PM early this afternoon, then rising to a high of 1.96 foot at 2:00 PM early this afternoon, before once again dropping to a low of 0.51 foot at 2:00 PM early this afternoon.

The sunrise was at 05:47 am this morning and will set at 06:56 pm this evening. The Moon is currently 26 days old, and is in a New Moon phase. The next Waxing Crescent will occur at 9:46 PM on Sunday, April 22nd.

Hawaii Wind Report

Maui Weather

79°/82°
Wind: NE at 26 mph
Sunrise: 5:45 AM
Sunset: 6:59 PM
current observations as of 1pm May 22nd, 2018

Weather Outlook for Saturday, 12th May 2018

Summary

A weak surface trough over the islands will move west and dissipate by Saturday morning, and a high far to the northwest will pass north of the islands on Sunday. This will clear out the vog for the smaller islands by Saturday morning, and allow trade winds to return for the weekend across the state, reaching breezy levels statewide by Sunday. The high will move away early next week, but a surface ridge will remain north of the islands, maintaining locally breezy trades.

Detailed Discussion

A weak surface trough near Kauai will continue to move to the west through the night and dissipate. High pressure to the far northwest will move to the east through the weekend. The high will bring trades back to the islands Saturday, and they are expected to peak on Sunday as the high moves due north of the islands. Starting Monday, the high will begin to move to the northeast, which will allow the pressure gradient over the islands to slacken a bit, but trades will still persist with a ridge to the north of the islands.

A weak trough passing north of the islands on Wednesday will likely lead to the lightest trade wind day this week, but trades are still expected to persist. Another high behind this trough will quickly move north of the islands Thursday and Friday, with a broader area of high pressure north and northeast of the islands to end the week.

There is some differences in the models with regards to the amount of showers we could see around the islands Saturday, but overall agreement will be that showers will remain focused over windward and mountain areas with the trades building in. In any case, no significant rainfall is being depicted by any of the models for tomorrow, or really for any point in the upcoming week, so fairly typical showers are expected.

The vog that reached the smaller islands today should begin to dissipate overnight and into Saturday morning as the trades return.

Central Valley (Kahului, Spreckelsville):

Breezy. Mostly sunny with isolated showers. Highs 82 to 88. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Leeward West (Lahaina, Ka`anapali):

Breezy. Mostly sunny with isolated showers. Highs 78 to 86. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

Partly sunny in the morning then becoming mostly sunny. Breezy. Scattered showers. Highs 64 to 83. Northeast winds 10 to 20 mph. Chance of rain 50 percent.

Windard Haleakala (Hana, Haiku, Makawao):

Partly sunny in the morning then becoming mostly sunny. Scattered showers. Highs around 80 at the shore to around 66 at 5000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 87 at the shore to 68 to 74 upcountry. Northeast winds up to 10 mph shifting to the southeast in the afternoon. Chance of rain 20 percent.

Haleakala Summit

Mostly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 62 at the visitor center to around 57 at the summit. East winds around 15 mph. Chance of rain 50 percent.

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