Waianae, Hawaii 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

079
FXHW60 PHFO 151320
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
320 AM HST Sun Jun 15 2025

.SYNOPSIS...
Breezy trades will generally focus clouds and showers over
windward and mauka through the week, especially at night and
during the early morning hours.

&&

.DISCUSSION...
A fairly typical breezy summertime trade wind pattern can be
expected through the week, with only minor fluctuations in wind
speeds and rain chances expected.

Surface high pressure to the north and northeast of the state
will maintain breezy trades through at least Tuesday. Model
guidance indicates that the local pressure gradient may fluctuate
some midweek as the two areas of high pressure merge into one and
build to the far northeast of the state, leading to some
variation in trade wind speeds...but generally speaking, breezy
conditions can be expected through the week. Looking aloft, a weak
upper level low will remain just west of Kauai today, possibly
leading to a slight uptick in windward and mauka showers for this
end of the state. However, these showers are expected to be light
as the strong temperature inversion prevents any substantial
vertical development. Mid level ridging will build over the state
as the aforementioned upper low retreats northwestward tomorrow,
maintaining stable conditions through the rest of the week.

In this stable, breezy tradewind pattern, showers will favor
windward and mauka areas overnight, along with the Kona slopes of
the Big Island each afternoon, as pockets of low level moisture
filter in on the trades.

&&

.AVIATION...
Locally breezy trade winds will persist through tomorrow and will
continue to focus incoming low clouds and showers over windward
and mauka areas. Brief MVFR ceilings and visibility will be
possible in any showers. Otherwise, VFR conditions are expected to
prevail.

AIRMET Tango is in effect for tempo moderate turbulence leeward
of mountains across all islands. This AIRMET will likely continue
over the next couple of days as breezy trade winds persist.

&&

.MARINE...
High pressure north of the region will continue to produce fresh
to locally strong trade winds throughout the week. A Small Craft
Advisory (SCA) for the windier waters and channels near Maui and
the Big Island was extended in time through Monday night, and this
advisory will likely continue for these windier waters through
much of the week.

A series of small, long-period, south swells will help boost surf
heights along south facing shores though the week. The first of
these swells will fill in today and Monday, followed by another
round from Wednesday into Thursday.

Rough and choppy surf along east facing shores will continue this
week. Surf will remain nearly flat along north facing shores
throughout the forecast period.

&&

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

&&

$$


DISCUSSION...Farris
AVIATION...Farris
MARINE...Bohlin