Glenn James
Hawaii Weather Today
Creator, Author, and Administrator for over 30 years

 

The latest update to this website was at 354pm Saturday afternoon HST


Here are the latest 24-hour precipitation totals (inches) for each of the islands Saturday afternoon: 

1.67  Kilohana, Kauai
1.09  Manoa Lyon Arboretum, Oahu
0.68  Puu Alii, Molokai
0.08  Lanai City, Lanai
3.97  Puu Kukui, Maui
2.87  Waiakea Uka, Big Island


The following numbers represent the strongest wind gusts (mph) Saturday afternoon:

27  Lihue, Kauai – NE
27  Kuaokala, Oahu – NE
25  Molokai AP, Molokai – NE
32  Lanai 1, Lanai – NE
36  Kealaloloa Rg, Maui – NNE
35  Puuloa, Big Island – NW


Hawaii’s Mountains – Here’s a link to the live webcam on the summit of our tallest mountain Mauna Kea (~13,800 feet high) on the Big Island of Hawaii. Here’s the webcam for the (~10,023 feet high) Haleakala Crater on Maui. These webcams are available during the daylight hours here in the islands, and at night whenever there’s a big moon shining down. Also, at night you will be able to see the stars, and the sunrise and sunset too…depending upon weather conditions.


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Big Blue…click twice for largest version

 

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 Cold front far northwest…thunderstorms in the deeper tropics

 

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Clear to variable cloudy over the island chain…high clouds to the south

 

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Localized Showers 

 

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Please open this link to see details on any current Watches, Warnings and Advisories noted above




~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Saturday comments:  I’m at home here in upper Kula, Maui, Hawaii

622am, it’s mostly clear here at my place, the low temperature was 57.5 degrees, relative humidity is 86%…with calm winds

733am, it’s quickly turned cloudy here in upper Kula

924am, now it’s quickly turned back to sunny to partly sunny here on Maui

115pm, back from playing pickleball in Haiku, it’s interesting, there were three of us guys, and about something like 12 women players…so much fun! Everyone has lots of fun, as there’s lots of joking around, and no one really cares if they win or lose, except me that is…haha.

 

Interesting Weather web blog: Mauka Showers…The Wet Dry Season of 2026

 

Hawaii’s Weather Highlights…as of Saturday afternoon: A high pressure system will linger north to northeast of the Hawaiian Islands through the middle of next week, producing moderate to breezy trades with minor fluctuations in speed. Brief increases in showers, most noticeable tonight and Sunday night, will give way to drier trades for most of next week. There is still significant uncertainty in next weekend`s weather.

Weather Narrative…as of Saturday afternoon: Radar and satellite show isolated showers across the windward areas of most islands, along with the usual trade wind pattern of mostly cloudy skies windward and partly cloudy to mostly sunny leeward. Winds were mainly out of the east or northeast, averaging 10 to 20 mph, with gusts to near 30 mph in a few places.

An evolving but basically persistent surface high pressure system to out north (sometimes northeast) will be with us for the next week. This should keep the trades blowing at moderate to breezy levels. There remains some uncertainty concerning the possible development of a surface low near the islands next Friday, but models are not giving a clear indication of what, if anything, might form.

In the meantime, two brief periods of enhanced showers appear to be on the way…one tonight and another Sunday night. There are no indications that heavy rain or flooding is likely. After that, we’re in for a period of relatively dry trades as we await anything that might develop late in the week. Winds should remain strong enough to keep any showers moving fast enough to occasionally carry over to leeward areas, but any rainfall amounts there will be light.

Fire Weather:  Fire weather conditions will remain below critical fire thresholds into the first half of next week. Breezy winds and minimum humidity levels will not align to reach critical levels in any of our fire weather zones. The subsidence inversion heights near Maui and the Big Island will range from 6,500 to 8,000 feet through Sunday.

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Here’s a near real-time Wind Profile of the Pacific Ocean – along with a Closer View of the islands / Here’s the latest Weather Map / Looping Surface Precipitation…through the next 8-days / Vog Map

 

Marine Conditions…as of Saturday afternoon: High pressure north of the islands maintains fresh to strong trades well into next week. The Small Craft Advisory (SCA) has been expanded in coverage to include Oahu and Kauai waters, as trades are forecast to strengthen modestly tonight and Sunday.

A mix of short period NNW swell which peaked at the outer buoys, and declining mid-long period swell (12 to 16 seconds) will keep small surf in place through Sunday. Both of these swells drop off by Monday, allowing surf to drop to tiny levels through much of the week, before a small northwest arrives towards the end of the week.

A mid to long period south-southwest swell (15 seconds) will keep above average surf in place over south shores, then decline Sunday and remain small through much of the week with background south swells. A small long period swell is possible next weekend.

Rough trade wind swell will produce above average surf for east shores through Tuesday, before declining with weakening trades mid-week. Expect some wrap of NNW swell for exposed shorelines.

 

>>> Highest Temperature Saturday, October 17, 2026 – 99 degrees at Corralitos, CA


>>> Lowest Temperature Saturday, October 17, 2026 – 8 degrees at Angel Fire, NM

 

9 Best Places To Visit On Gorgeous Kauai


World-wide Tropical Cyclone Activity

 



>>> Here’s a link to the latest Pacific Disaster Center’s Weather Wall



Atlantic Ocean: There are no active tropical cyclones 

>>> Off the East Coast of the United States:

A strong non-tropical low pressure area is expected to form during the next day or two off of the eastern coast of the United States. This low is likely to move slowly and erratically through the middle of next week, and some subtropical development is possible during this time. Regardless of whether subtropical development occurs, this system will cause high winds, coastal flooding, and dangerous surf along portions of the U.S. East Coast.

* Formation chance through 48 hours…low…near 0 percent.
* Formation chance through 7 days…low…20 percent


Caribbean Sea: There are no active tropical cyclones


Gulf of America: There are no active tropical cyclones

 

Northeast Pacific

Tropical cyclone 21E (Trudy) is located about 115 miles south-southwest of Manzanillo, Mexico 

HURRICANE HUNTER AIRCRAFT FINDS THAT TRUDY IS A LITTLE STRONGER…FORECAST TO PASS NEAR THE COAST OF WEST-CENTRAL MEXICO TONIGHT AND SUNDAY

According to the NHC advisory number 18 

Trudy is moving toward the northwest near 10 mph. A general northwestward to north-northwestward motion is expected through Sunday, followed by a turn toward the west-northwest Sunday night. On the forecast track, the center of Trudy will approach the coast of southwestern and west-central Mexico this afternoon and pass near the coast tonight and Sunday. Reports from an Air Force Reserve Hurricane Hunter aircraft indicate that maximum sustained winds are now near 100 mph with higher gusts. Some additional strengthening is possible tonight. Weakening is expected to begin late Sunday or Sunday night. Hurricane-force winds extend outward up to 35 miles from the center and tropical-storm-force winds extend outward up to 140 miles. The minimum central pressure estimated from the Hurricane Hunter aircraft data is 976 mb (28.82 inches).

cone graphic

 

>>> South of Southern Mexico:

An area of low pressure is forecast to form offshore of southern Mexico during the early to middle part of next week. Environmental conditions appear conducive for gradual development thereafter, and a tropical depression is likely to form during the latter half of next week while it moves generally westward to west-northwestward over the eastern and central portions of the East Pacific.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…high…70 percent

 

Central North Pacific: There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7 days.

 

Northwest Pacific Ocean:

Tropical Cyclone 29W (Champi)…is located approximately 36 NM south of Andersen AFB                                                                                                   

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Tropical Cyclone 01P (Wati)…is located approximately 437 NM east of Pago Pago

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Southwest Pacific Ocean: There are no active tropical cyclones

North and South Indian Oceans / Arabian Sea: There are no active tropical cyclones

 

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Here’s the link to the Joint Typhoon Warning Center (JTWC)



Interesting:  Discovery Marks the First Detection of Variable Water Clouds Outside of Our Solar System

A Jupiter-sized world just 7.5 light-years away is cloudy, chemically complex, and, it turns out, more like home than anyone expected.

Using the James Webb Space Telescope, Brittany Miles, assistant astronomer at University of Arizona Steward Observatory, led a team that spent 11 hours staring at WISE 0855, the coldest known brown dwarf, collecting a spectrum of its light every 15 minutes. The result is the most detailed time-series portrait ever taken of this frigid world – and the first direct confirmation that water clouds on another body are changing thickness over time, just like weather on Earth.

The study, published in The Astrophysical Journal, reveals that WISE 0855’s atmosphere is shaped by at least two distinct processes playing out simultaneously: water clouds at high altitudes that grow thicker and thinner as the object rotates, and deep chemical gases being dredged upward by convection from far below. Untangling those two signals – previously impossible with older telescopes – is what makes JWST data so powerful.

“This is the first time we’ve been able to confirm that water clouds are becoming thinner and thicker on a nearby world,” said Miles, a postdoctoral researcher at Steward Observatory. “Before JWST, we only had photometry, which mixed up the effects of clouds, chemistry, and temperature all together. Now we can actually distinguish them.”

Read More: University of Arizona

Image: Artist’s concept of a brown dwarf. Brown dwarfs begin their lives like stars but they never accumulate enough mass to fuse atoms steadily at their cores and ignite with starlight.