Waipio, Hawaii 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

055
FXHW60 PHFO 140129
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
329 PM HST Fri Jun 13 2025

.SYNOPSIS...
Trade winds will persist through the week and will be breezy and
gusty Saturday through Tuesday. Showers will be focused along
typical windward and mauka areas, as well as the Kona slopes of
the Big Island each afternoon.

&&

.DISCUSSION...
Rather typical June trade wind conditions are in place. Broad high
pressure north of the state is driving moderate to locally breezy
trade winds, and a mid-level ridge overhead is producing very
stable conditions with an inversion based between 5,000 and 6,500
ft. As a result, modest showers of mostly a quarter of an inch or
less have been focused along windward areas since less night, with
the highest totals on the Big Island and Maui. Expect minimal
windward rainfall today, and aside from scattered afternoon and
evening showers along the Kona slopes of the Big Island, leeward
areas will be dry. A weak upper-level low centered west of Kauai
will send thin high clouds overhead but will otherwise have no
impact on local weather today.

An uptick in the trades will occur during the weekend as high
pressure builds north of the islands. Breezy and gusty winds will
gradually increase Saturday and peak Sunday. Little change in the
shower pattern is expected over most islands, though a modest
increase in rainfall is possible over Kauai as the above mentioned
upper-level low drifts closer.

Trade winds and a typical pattern of mainly windward showers will
persist next week. Breezy and gusty trades will hold through
Tuesday then drop slightly midweek. Stable conditions will persist
with no significant sources of enhanced moisture noted in the
guidance.


&&

.AVIATION...
Moderate to breezy trade winds will focus incoming low clouds and
showers over windward and mauka areas. Brief MVFR ceilings and
visibility may occur overnight along the windward slopes, with the
possibility of AIRMET Sierra for tempo mountain obscurations. VFR
conditions expected elsewhere through Saturday.

AIRMET Tango is posted for tempo moderate turbulence leeward of
mountains across all islands. This will likely continue through
the weekend as trade winds strengthen.

&&

.MARINE...
High pressure will build far north of the islands this weekend
and will strengthen the trade winds a notch especially Sunday
into early next week. A Small Craft Advisory (SCA) for the
windier waters and channels around Maui County and the Big Island
remains in effect through Sunday, but will likely need to be
expanded in coverage and extended as the trades strengthen.

Surf along south facing shores will be small through Saturday. A
series of small, long period, south swells originating from
fetches near New Zealand will help boost surf heights near the
summer average (5 feet) throughout next week. The first boost
should fill in Sunday into Monday, followed by another bump
Wednesday into Thursday of next week.

Rough and choppy surf along east facing shores are expected to
slightly increase this weekend into early next week due to trade
winds strengthening. Surf will remain at seasonable levels
(nearly flat) along north facing shores throughout the forecast
period. Some select exposures could see some tradewind swell
wrap.

&&

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

&&

$$

DISCUSSION...Wroe
AVIATION...Foster
MARINE...Kino