Wailuku, Hawaii 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

679
FXHW60 PHFO 101313
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
313 AM HST Thu Jul 10 2025

.SYNOPSIS...

High pressure far northeast of the state will maintain moderate
to locally breezy trades through the week. Expect fairly typical
summertime weather with clouds and showers favoring windward and
mauka areas.

&&

.DISCUSSION...

Currently, satellite imagery shows small bands of moisture
embedded in the trades with clouds moving into windward and mauka
areas. Radar imagery shows showers across the area which are
expected to continue into the early morning hours.

A high pressure is parked well to the northeast of the state.
This high is expected to be in place until Sunday when it will
drift off to the north. Due to this high, moderate to breezy
trades should continue through Saturday. Once the high starts
drifting away trades should weaken a bit.

While an organized source of moisture upstream is lacking with a
dry and stable airmass overhead we can expect typical summertime
showers and clouds to favor windward and mauka slopes through the
forecast period.


&&

.AVIATION...

Moderate to locally breezy trades will persist for the next
couple of days. Low cigs and SHRA should mainly be focused over
windward and mauka locations. MVFR conds possible in SHRA,
otherwise VFR prevails.

AIRMET Sierra is in effect for mtn obsc for windward portions of
all of the smaller islands.

AIRMET Tango is in effect for low level turb downwind of island
terrain.

&&

.MARINE...

High pressure far northeast of the waters will drive moderate to
locally strong trade winds. The Small Craft Advisory that is in
effect for the typical windy waters around Maui County and Big
Island has been extended through Friday afternoon. Trades may
slightly weaken early next week as the high moves further away to
the north.

The recent small, long period south swell will continue its
decline through the day. A reinforcing longer period south swell
is scheduled to arrive Friday night. This little boost, in tandem
with another small, long period south swell arriving Sunday night
into Monday, will hold south-facing shore surf to summer averages
(~5 to 6 ft in higher sets). East-facing shore surf will remain
rough as moderate to fresh trades blow the remainder of the week.
A very small northwest swell originating behind a front hanging up
far northwest of the islands may pass through early next week.

&&

.FIRE WEATHER...

Moderate to locally breezy trade winds will continue through the
next several days. Afternoon relative humidity should be near
summertime normals. Expect typical summertime fire weather
conditions into next week.


&&

.HFO WATCHES/WARNINGS/ADVISORIES...
Small Craft Advisory until 6 PM HST Friday for Maalaea Bay-
Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big
Island Southeast Waters.


&&

$$


DISCUSSION...Walsh
AVIATION...Walsh
MARINE...Blood
FIRE WEATHER...Walsh