5-9 foot
2-4 foot
0-2 foot
0-0 foot

A Small Craft Advisory is in effect for all waters through tonight for winds and seas. Isolated thunderstorms remain likely over the coastal waters through today.

A northwest swell is on the decline while surf along east shores increases due to strong trade winds. A High Surf Advisory is in effect for eastern shores. A small north swell is expected Tuesday, and a small/moderate northwest swell will fill in for the second half of the week. Surf will remain small along south facing shores with some modest increases through the week.

Hawaii Wave Height Model

Tide Predictions

A high tide at Kahului will be 1.98 foot at 1:56am

High tide at Kahului was 1.98 foot at 1:56am late last night, dropping to a low of -0.23 foot at 8:13am this morning, then rising once again to a high of 2.15 foot at 2:38pm this afternoon, before once again dropping to a low of 0.23 foot at 8:39pm this evening.

The sunrise was at 06:04 am this morning and will set at 06:46 pm this evening. The Moon is currently 29 days old, and is in a New Moon phase. The next Waxing Crescent will occur at 3:35 PM on Saturday, March 24th.

Hawaii Wind Report

Maui Weather

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

Weather Outlook for Sunday, 15th April 2018

Summary

Breezy, wet, and unstable conditions will continue today. An upper level low to the west of the state will tap deep moisture in the breezy trade wind flow, maintaining the threat of heavy rain and thunderstorms. While the primary flood threat will be across windward slopes, all areas could experience heavy rainfall. As the upper level low slowly moves away on Monday and Tuesday, the breezy trade wind flow will gradually stabilize, causing typical rainfall to focus along windward slopes. Breezy trade winds and extensive high clouds will hold through much of the week, with unsettled weather possible late in the work week.

Detailed Discussion

Wet and unstable conditions remain in place. An upper level low parked several hundred miles west of Kauai is generating the instability along with a shield of high clouds blanketing much of the state. A strong surface high passing far north of the state is driving the breezy and gusty trades, while a subtle mid level trough appears to stretch from northeast to southwest just west of Kauai. It is this subtle trough along with a shortwave trough lifting northward to its east that has been focusing heavy showers and thunderstorms over the Garden Isle, where historical flooding continues. From Oahu to Maui, moderate to briefly heavy showers have been largely confined to windward slopes, with occasional batches of light to moderate showers pushing into leeward areas. On the Big Island, more persistent heavy showers and thunderstorms have been pulsing along windward slopes.

The threat of heavy, flooding showers and thunderstorms in the breezy trade wind flow will persist through the day today. The subtle mid level trough near Kauai will eventually begin to drift westward, taking a focusing mechanism for moisture away from the islands. However, deep moisture will linger over the islands, and the GFS model is showing a weak shortwave aloft passing over the entire state this morning. This points toward a threat of continued heavy, flooding rainfall and a chance of thunderstorms for mainly windward slopes, and potentially the entire island of Kauai. That said, grounds are saturated in many locations, including some leeward areas, and a Flash Flood Watch remains in effect for all locations on all islands.

The atmosphere will gradually stabilize on Monday and Tuesday locally breezy trade winds hold. The upper level low will slowly fill and drift westward, bringing an increase in stability and pulling the deepest moisture west of the islands. This will likely result in a drying trend over leeward areas of most islands, though moderate rainfall will persist over windward slopes. High clouds will still hang around over most areas.

Some instability could return to the trade wind flow later in the week. The GFS and ECMWF show the weakened upper trough to the west being pushed back over the state on Thursday. If this occurs, heavy showers and thunderstorms could again be possible, with rainfall continuing to be focused along windward slopes.

Central Valley (Kahului, Spreckelsville):

FLASH FLOOD WATCH IN EFFECT THROUGH THIS AFTERNOON. Breezy. Mostly cloudy with isolated showers and slight chance of thunderstorms. Locally heavy rainfall possible in the morning. Highs around 83. Northeast winds 15 to 25 mph. Chance of rain 20 percent.

Leeward West (Lahaina, Ka`anapali):

FLASH FLOOD WATCH IN EFFECT THROUGH THIS AFTERNOON. Mostly cloudy. Breezy. Showers and thunderstorms likely in the morning, then showers likely in the afternoon. Locally heavy rainfall possible in the morning. Highs 79 to 85. East winds 15 to 25 mph with gusts to 40 mph. Chance of rain 70 percent.

Windward West (Wailuku, Waiehu):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM HST MONDAY… …FLASH FLOOD WATCH IN EFFECT THROUGH THIS AFTERNOON. Cloudy and breezy. Frequent showers and thunderstorms in the morning, then showers likely and slight chance of thunderstorms in the afternoon. Locally heavy rainfall possible. Highs 70 to 83. East winds 15 to 25 mph with gusts to 40 mph. Chance of rain 80 percent.

Windard Haleakala (Hana, Haiku, Makawao):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM HST MONDAY… …FLASH FLOOD WATCH IN EFFECT THROUGH THIS AFTERNOON. Breezy. Frequent showers and thunderstorms in the morning, then showers likely and slight chance of thunderstorms in the afternoon. Locally heavy rainfall possible. Highs around 81 at the shore to around 65 at 5000 feet. East winds 15 to 25 mph with gusts to 40 mph. Chance of rain near 100 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

FLASH FLOOD WATCH IN EFFECT THROUGH THIS AFTERNOON. Mostly cloudy. Breezy. Isolated showers and thunderstorms in the morning, then scattered showers in the afternoon. Locally heavy rainfall possible in the morning. Highs around 85 at the shore to 65 to 71 upcountry. East winds 15 to 25 mph with gusts to 40 mph. Chance of rain 50 percent.

Haleakala Summit

FLASH FLOOD WATCH IN EFFECT THROUGH THIS AFTERNOON. Mostly cloudy. Breezy. Scattered showers and thunderstorms in the morning, then scattered showers in the afternoon. Locally heavy rainfall possible in the morning. Highs around 57 at the visitor center to around 54 at the summit. East winds 15 to 25 mph. Chance of rain 50 percent.

Photo of the Day