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Hilo, Hawaii 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Hilo International Airport HI
National Weather Service Forecast for: Hilo International Airport HI
Issued by: National Weather Service Honolulu, HI
Updated: 6:01 am HST Jul 13, 2025
 
Today

Today: Scattered showers, mainly before noon.  Mostly sunny, with a high near 81. Calm wind becoming east northeast 5 to 7 mph in the afternoon.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Scattered
Showers
Tonight

Tonight: Scattered showers.  Mostly cloudy, with a low around 70. Northeast wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Scattered
Showers
Monday

Monday: Scattered showers.  Partly sunny, with a high near 83. Calm wind becoming east 5 to 9 mph.  Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Scattered
Showers
Monday
Night
Monday Night: Showers likely.  Mostly cloudy, with a low around 71. Light south wind.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Showers
Likely
Tuesday

Tuesday: Scattered showers, mainly before noon.  Mostly sunny, with a high near 83. Calm wind becoming east 5 to 7 mph.  Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Scattered
Showers
Tuesday
Night
Tuesday Night: Scattered showers.  Mostly cloudy, with a low around 71. Calm wind becoming northeast around 6 mph after midnight.  Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Scattered
Showers
Wednesday

Wednesday: Scattered showers, mainly before noon.  Mostly sunny, with a high near 83. Northeast wind 5 to 9 mph.  Chance of precipitation is 40%.
Scattered
Showers
Wednesday
Night
Wednesday Night: Scattered showers.  Mostly cloudy, with a low around 70. North northeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 50%.
Scattered
Showers
Thursday

Thursday: Scattered showers, mainly before noon.  Partly sunny, with a high near 82. East northeast wind 3 to 8 mph.  Chance of precipitation is 40%.
Scattered
Showers
Hi 81 °F Lo 70 °F Hi 83 °F Lo 71 °F Hi 83 °F Lo 71 °F Hi 83 °F Lo 70 °F Hi 82 °F

 

Today
 
Scattered showers, mainly before noon. Mostly sunny, with a high near 81. Calm wind becoming east northeast 5 to 7 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
 
Scattered showers. Mostly cloudy, with a low around 70. Northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Monday
 
Scattered showers. Partly sunny, with a high near 83. Calm wind becoming east 5 to 9 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
 
Showers likely. Mostly cloudy, with a low around 71. Light south wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
 
Scattered showers, mainly before noon. Mostly sunny, with a high near 83. Calm wind becoming east 5 to 7 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
Scattered showers. Mostly cloudy, with a low around 71. Calm wind becoming northeast around 6 mph after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
 
Scattered showers, mainly before noon. Mostly sunny, with a high near 83. Northeast wind 5 to 9 mph. Chance of precipitation is 40%.
Wednesday Night
 
Scattered showers. Mostly cloudy, with a low around 70. North northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.
Thursday
 
Scattered showers, mainly before noon. Partly sunny, with a high near 82. East northeast wind 3 to 8 mph. Chance of precipitation is 40%.
Thursday Night
 
Showers likely, mainly after midnight. Mostly cloudy, with a low around 71. Light northeast wind. Chance of precipitation is 60%.
Friday
 
Scattered showers. Partly sunny, with a high near 82. Calm wind becoming east 5 to 8 mph. Chance of precipitation is 50%.
Friday Night
 
Showers likely. Mostly cloudy, with a low around 71. Light and variable wind. Chance of precipitation is 70%.
Saturday
 
Scattered showers. Partly sunny, with a high near 82. Calm wind becoming east 5 to 8 mph. Chance of precipitation is 50%.

 

Forecast from NOAA-NWS for Hilo International Airport HI.

Weather Forecast Discussion
604
FXHW60 PHFO 131319
AFDHFO

Area Forecast Discussion
National Weather Service Honolulu HI
319 AM HST Sun Jul 13 2025

.SYNOPSIS...
A tight eastern Pacific pressure gradient created from high
pressure located far northeast of Hawaii will maintain moderate to
locally breezy trade winds the next several days. Scattered clouds
and showers will mainly focus along windward exposures and upslope
mauka. An increase in shower activity will occur Monday afternoon
into Tuesday.

&&

.DISCUSSION...
This week kicks off with a lull in both shower activity and trade
wind strength. The primary reasoning for this minor drop off in
winds will be that the 1033 mb high located approximately 1,500
miles northeast of the islands will subtly advance a touch further
northward through Monday. This minor movement of the high will
maintain a tight enough downstream pressure gradient to still
produce island-wide breezy trades across many open exposures,
higher terrain and through narrow channels. Slightly drier air
moving through this morning will initiate a period of relatively
less shower activity. Of course, there will be the scattered
showers of low accumulation that intermittently pass across
windward locales, with the occasional shower spilling over into
leeward communities. The disclaimer exception will be afternoon
showers that form along Big Island`s kona slopes. Today`s overall
theme will be warm and breezy under partly cloudy skies.

Ribbons of increased moisture will pass over the islands Monday
afternoon into Tuesday. Expect an increase in showers on windward
Big Island midday Monday, then showers will spread into the
central islands Monday night...pushing west into Oahu and Kauai
early Tuesday. As the upper level low currently churning several
hundred miles north of the state retreats further north Monday,
mid to upper level ridging will fill in its wake. This will set
the stage for several days of stable, typical dry summer-like
weather. Moderate trades will be mainstay for the majority of
the week, possibly becoming locally fresh through eastern island
bays and channels by the middle of the week. The eastern upstream
air mass will be near to slightly below normal per late July`s
moisture standards. So, thicker clouds and the bulk of mid to
late week shower activity will be the result of topographic
enhancement. The center of the northeast Pacific high may drift or
expand closer to the state later in the week, re-tightening the
large scale gradient and resulting in a slight uptick in trade
winds.

&&

.AVIATION...
Moderate trades will persist through the day. Clouds and showers
will generally favor windward and mountain areas across all
islands and may result in MVFR conditions at times. Low clouds and
showers will likely persist for windward areas of most islands
through the afternoon and evening as a band of moisture moves
through the island chain from the east. Otherwise, VFR conditions
will generally prevail.

&&

.MARINE...
The high pressure ridge will weaken north of the Hawaiian Islands,
decreasing trade winds speeds through Monday. The ridge will
strengthen from Tuesday onward increasing trade wind speeds back
into the moderate to locally strong range through the end of this
week. Wind speeds will remain just below Small Craft Advisory
(SCA) levels through the winder eastern island bay and channels this
morning. SCA conditions may return by Tuesday as wind speeds
increase over these notoriously windier zones.

Surf along south facing shores will remain small today as small
background south southwest swell energy moves through the region.
A small, long period south swell will arrive later tonight into
Monday morning and peak late Monday into Tuesday. South swell
energy will gradually diminish through Thursday. The next small
long period south swell arrives late Friday and will boost south
shore surf into next weekend.

Wind wave driven surf heights along east facing shores will
remain on the small and choppy side today, then increase slightly
through midweek as trade wind speeds strengthen. A very small
northwest swell may pass through early next week, providing tiny
surf along north facing shores on Monday and Tuesday before
becoming nearly flat through the remain forecast period.

&&

.FIRE WEATHER...
Trade winds will remain in the moderate to locally breezy the next
several days. While the atmosphere will be rather dry on through
early Monday, expect typical summer time fire weather conditions.
Higher humidity is favored later Monday into Tuesday, followed by
a return to drier and typical late July conditions going into the
middle of the week.

&&

.HFO WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$


DISCUSSION...Blood
AVIATION...Blood
MARINE...Bohlin
FIRE...Blood
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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