1-3 foot
1-3 foot
3-5+ rising foot
1-3 foot

A series of long period south swells will keep fun surf along the south and west facing shores well into next week. The largest of the south swells is forecast to build later Saturday and could produce surf near or at advisory levels for the south facing shores Sunday into early next week. The current philosophy keeps a 3 to 4 feet, 17-19 second south swell over most of the area for Sunday and Monday. The south swell will gradually lower through the first half of next week and remain small during the second half of the week.

A short period northwest swell will decline through the rest of the weekend.

Small southeast swells will persist through the middle of next week, but the Big Island will block some of the swell from reaching the smaller islands.

Light trade winds will prevail over the coastal waters through the weekend. High pressure will build in from the northwest and trade winds will gradually strengthen starting Monday. The typically windier waters around Maui County and the Big Island could see Small Craft Advisory winds by midweek. As the trade winds strengthen next week, so should surf along east facing shores.

Hawaii Wave Height Model

Tide Predictions

The sunrise was at 05:48 am this morning and will set at 06:56 pm this evening. The Moon is currently 7 days old, and is in a Quarter phase. The next Waxing Gibbous will occur at 9:11 PM on Saturday, May 18th.

Maui Weather

°/°
Wind: n/a at 0 mph
Sunrise:
Sunset:
current observations as of 11am May 20th, 2019

Weather Outlook for Saturday, 11th May 2019

Summary

A ridge of high pressure northwest of the islands will maintain a gentle trade wind flow through the rest of the weekend. A weak surface trough is expected to bring an uptick in showers to especially the eastern islands Saturday night through Tuesday. A passing upper level disturbance will help enhance some of these showers between Sunday and Tuesday. Strengthening high pressure toward the middle of next week will bring a boost in the trade winds to locally strong.

Detailed Discussion

Clouds and showers picked up in the evening as an area of clouds with embedded showers blew through. As of 3 am HST, most of the showers have gone by, although some bit of cloudiness still remains. These clouds are expected to thin out later this morning, resulting in fairly descent afternoon.

The gentle trades on tap for today will promote locally daytime sea breezes that will lead to some interior and leeward cloudiness in the afternoon hours. A stable air mass, though, will limit the showers to isolated.

A change is then coming.

A weak, surface trough, marked by an area of clouds on satellite, about 100 miles east of Cape Kumukahi, Big Island, is moving slowly west with the trade wind flow. We expect the bulk of the moisture to move across windward Big Island tonight, and onto Maui on Sunday. Some of this moisture will continue on to the remaining islands downwind, but windward Maui and the Big Island will be impacted the most. The surface trough is expected to dissipate when it reaches Maui on Sunday. Between Sunday and Monday, a passing upper level disturbance will help enhancement the shower-bearing clouds beneath. Leeward Big Island will see an uptick in showers both Sunday and Monday afternoons as well. This moisture field and lingering instability may linger into Tuesday.

Upper ridging will begin building across the area Tuesday night, causing a strengthening of surface high pressure passing north of the islands. This will result in a boost in the trades to locally strong and more stable air mass.

Central Valley (Kahului, Spreckelsville):

Mostly clear. Lows around 66. Northeast winds up to 10 mph.

Leeward West (Lahaina, Ka`anapali):

Mostly clear with isolated showers. Lows 64 to 70. East winds up to 10 mph. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

Partly cloudy with isolated showers. Lows 57 to 69. Northeast winds up to 10 mph. Chance of rain 20 percent.

Windard Haleakala (Hana, Haiku, Makawao):

Partly cloudy. Isolated showers in the evening, then scattered showers after midnight. Lows around 69 at the shore to around 53 at 5000 feet. Southeast winds up to 10 mph. Chance of rain 40 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Mostly clear. Lows around 66 at the shore to around 55 upcountry. Light winds becoming east up to 10 mph after midnight.

Haleakala Summit

Mostly clear with isolated showers. Lows around 51 at the visitor center to around 47 at the summit. Light winds. Chance of rain 20 percent.