High Surf Advisory

...HIGH SURF ADVISORY FOR THE SOUTH FACING SHORES OF ALL ISLANDS... .THE ABOVE NORMAL SWELL GENERATED BY A PASSING STORM IN THE FAR SOUTH PACIFIC...IS ON ITS WAY DOWN. EXPECT THIS SWELL...AND SURF TO BE EASE BELOW ADVISORY LEVEL BY LATE THIS AFTERNOON. ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST THIS EVENING...

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0-3 foot
0-2 foot
3-5 foot
1-4 foot


Continuing south swell should keep our south facing shores in the chest to head-high range with larger sets possible from time to time at the better exposed breaks. Another reinforcement is due to arrive Thursday which should keep plenty action along the summer shores into the weekend. This new reinforcement may increase the surf heights to near or above advisory levels. The out-of-season north-northwest swell has faded and should be back to flat conditions along our winter shores although another east-northeasterly windswell should begin to rise. Two tropical systems far east of the islands are posing no threat to Hawai`i and will not send any surf in our direction. The South Pacific will remain in a more or less zonal west to east pattern through the next few days but we may see some extra energy pushing into our swell window beginning Thursday. The long-range models hint toward the potential of some decent swell developing Friday into the weekend but it is too early for confidence. Check back for details in a few days for more updates. Another south-southwest swell is expected over the weekend around moderate levels. There is plenty late summer action over the next week, but there are still no big swells expected any time soon.

Today’s Surf Summary

South facing shores should be around 3-5 foot or slightly higher in some locations. Windswell along the east and northeast facing shores should drop to around 1-4 foot, and it is slowly rising. North and northwest facing shores are back to the typical flatness around 0-3 foot with no swell to mention. Upper West shores will also remain flat at 0-2 foot.

Hawaii Wave Height Model

Hawaii Swell Period Model
Hawaii Swell Height Model


Wind and Tide Information

Low tide at Kahului was 0.4 foot at 4:54 AM early this morning, rising to a high of 2.1 foot at 1:05 PM early this afternoon, then dropping to a low of 1.1 foot at 8:16 PM early this evening, before once again rising to a high of 1.2 foot at 11:24 PM shortly before midnight

The sunrise was at 06:05 am this morning and will set at 06:53 pm this evening. The Moon is currently 24 days old, and is in a Last Quarter phase. The next Waning Crescent will occur at 2:13 PM on Monday, August 25th.

Moderate east to northeasterly tradewinds will remain around 10-20 mph today with little to no change expected through the rest of the week. The winds are forecast to decrease over the weekend, but it is a bit too early for confidence.

Hawaii Wind Report

Maui Weather

76°/78°
Wind: NE at 12 mph
Sunrise: 6:07 AM
Sunset: 6:49 PM
current observations as of 3am August 22nd, 2014

Weather Outlook for Tuesday

Trade wind weather will continue through the week with showers favoring windward and mountain locations. Windward showers will increase this afternoon and tonight as the atmosphere becomes somewhat unstable. Expect a few showers to reach leeward locations as well. A drier trade wind pattern is on tap for the second half of the week and weekend.

Moderate trade winds are blowing this morning with some low clouds covering windward areas, bringing some light showers. This morning’s visible imagery shows building clouds and showers upstream of Kauai and Oahu. Windward and mountain areas of these islands will see increasing clouds and showers this afternoon. Tonight, clouds and showers will increase across all windward areas as an upper low dips south over the state, bringing some atmospheric instability. Cloud top height will increase with the added instability, allowing for heavier rainfall and an increase in shower coverage. The higher cloud tops will allow some showers to reach leeward locations as well.

The upper low will linger through Tuesday before pulling north of the islands Wednesday, keeping windward areas under passing showers through Tuesday night. For the second half of the week, expect diminishing showers and clouds as the low moves away and a stable atmosphere moves in. Moderate trade winds will continue into the weekend as high pressure remains far northeast of the state.

The tropics remain active in the east Pacific, but latest forecasts from the National Hurricane Center and global models keep any tropical systems far from Hawaii through the foreseeable future.

Central Valley (Kahului, Spreckelsville):

Mostly clear with isolated showers. Lows 67 to 73. Northeast winds 10 to 15 mph and gusty. Chance of rain 20 percent.

Leeward West (Lahaina, Ka`anapali):

Partly cloudy with isolated showers. Lows 68 to 76. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

Mostly cloudy with showers likely. Lows 59 to 74. East winds 10 to 15 mph. Chance of rain 70 percent.

Windard Haleakala (Hana, Haiku, Makawao):

Mostly cloudy with showers likely. Lows around 72 at the shore to around 53 at 5000 feet. East winds 10 to 15 mph. Chance of rain 70 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Mostly clear. Isolated showers in the evening. Lows around 71 at the shore to around 52 at 5000 feet. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Haleakala Summit

Mostly clear with isolated showers. Lows around 49 at 7000 feet to around 46 at the summit. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Photo of the Day

Surf Photo of the Day - August 18th, 2014

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