Waihee-Waiehu, Hawaii 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

361
FXHW60 PHFO 041926
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
926 AM HST Sat Jul 4 2026

.SYNOPSIS...
High pressure north of the islands will help maintain moderate to
breezy trades through the week. Stable conditions will focus
limited showers over windward and mauka areas through at least the
middle of the week.


&&

.SHORT TERM UPDATE...
Forecast looks on track for this morning. No anticipated update.

&&

.PREV DISCUSSION...
Issued at 332 AM HST Sat Jul 4 2026
High pressure just north of the Hawaiian Islands will remain the
dominant feature, maintaining stable moderate to breezy trades
over the next several days. Bands of moisture continue to ride
within these trades, bringing increased shower activity to
windward and mauka areas, namely across Kauai and the Big Island
through the early portions of this weekend. The remainder of the
islands will see little rainfall as a brief period of drier
conditions can be expected through much of today.

Trades gradually strengthen by the turn of the week as the
aforementioned high just to the north of the islands builds and
meanders a bit to the southeast. Conditions are expected to remain
stable, focusing typical shower activity to windward and mauka
areas through the early portion of the next week.

By the end of next week, excess residual moisture associated with
Post-Tropical Cyclone Douglas may extend to the island chain by
way of breezy trade wind flow. This may bring increased shower
activity over initially windward and mauka locations and may
spread further into leeward portions of the state toward the end
of the forecast period.

&&

.AVIATION...
Moderate to locally breezy trades will continue through the
holiday weekend. Low clouds and showers will bring MVFR
conditions to windward and mauka areas at times. Otherwise, VFR
conditions will prevail.

AIRMET Sierra remains in effect for mountain obscuration across
windward sections of the Big Island, Oahu and Kauai. While a plume
of moisture seen upstream of the Big Island may continue to
supply clouds and showers to its windward areas for most of the
day, conditions will likely improve for Oahu and Kauai by this
afternoon.

AIRMET Tango remains in effect for moderate low level turbulence
over and downwind of terrain of all islands. This AIRMET will
likely continue through the weekend.

&&

.MARINE...
Issued at 332 AM HST Sat Jul 4 2026
A high pressure ridge north of the Hawaiian Islands will keep
trade winds blowing across the region through the week. A Small
Craft Advisory (SCA) for the typical windy waters and channels
around Maui and the Big Island continues through Monday. Minor
fluctuations in wind speeds may allow for brief periods of
additional zones to fall into the SCA coverage area over the next
several days.

As the current small long period south swell fades, yet another
overlapping moderate long period south-southwest swell will fill
in today, boosting south shore surf heights to near High Surf
Advisory levels Sunday and Monday. This swell will slowly fade
from Tuesday through the middle of next week.

Surf along east facing shores will remain rough and choppy through
the forecast period as moderate to locally strong trades hold.
Surf along north facing shores will remain tiny into next week.

&&

.FIRE WEATHER...
Moderate to locally near critical fire weather conditions will
persist through early next week. High pressure north of the state
will produce locally breezy trade winds, with the strongest winds
expected to develop Sunday or Monday. A slightly drier air mass
in place will cause relative humidity to fall to around 45
percent each afternoon beginning today. Fuel conditions, as
measured by the Keetch Byran Drought Index, will remain below the
critical threshold.

&&

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


&&

$$

UPDATE/FIRE WEATHER...Foster
DISCUSSION...Pierce
AVIATION...Farris
MARINE...Bohlin