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

 

The latest update to this website was at 506pm Sunday evening HST


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

1.56  Kilohana, Kauai
1.32  Schofield East, Oahu
0.52  Puu Alii, Molokai
0.00  Lanai
3.44  Puu Kukui, Maui
2.69  Spencer, Big Island


The following numbers represent the strongest wind gusts (mph) Sunday evening:

27  Lihue, Kauai – NE
38  Kuaokala, Oahu – NE
38  Molokai AP, Molokai – NE
35  Lanai 1, Lanai – NE
44  Na Kula, Maui – ESE
40  Kealia Pond, Big Island – NE


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.


https://weather.gc.ca/data/satellite/goes_gwdisk11_1070_100.jpg

Big Blue…click twice for largest version

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/tpw/13/GOES18-TPW-13-900x540.gif

 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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https://radar.weather.gov/ridge/standard/PHKI_loop.gif

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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 Sunday comments:  I’m at home here in upper Kula, Maui, Hawaii

456am, it’s mostly clear here at my place, the low temperature was 56 degrees, relative humidity is 84%…with calm winds

1209pm, lots of clouds along the windward sides and over and around the mountains here in Maui County, although with mostly sunny conditions along the beaches.

410pm, it’s nice and sunny along the leeward slopes of the Haleakala Crater, all the way down to the ocean. In contrast, it’s cloudy with showers along the windward coasts and slopes.

 

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

 

Hawaii’s Weather Highlights…as of Sunday evening: A high pressure system will strengthen north of the Hawaiian Islands, producing moderate to locally windy trades. Light to moderate showers will focus over windward and mauka areas, with brief showers spilling over to leeward areas, especially during the overnight and early morning hours. Confidence is increasing that an upper level trough will deepen to the north of the state from Thursday into next weekend, creating a surface low to our north. This would turn our winds out of the southeast starting around Thursday, and may eventually drive a weak front through the state.

Weather Narrative…as of Sunday evening: Two radars (Molokai and Upolu on the Big Island) remain temporarily out of service, limiting radar coverage from Oahu to northern portions of the Big Island. With that said, the two functioning radars showed isolated windward and mauka showers over Kauai and eastern Big Island. Satellite indicated a typical trade wind pattern of mostly cloudy windward and mostly sunny leeward across most islands. Winds were gusty and mainly out of the northeast. Average speeds were 15 to 20 mph, with gusts of 30 to 40 mph.

A large surface high pressure system was centered to our north. This high will remain nearly stationary for the next few days, then weaken and begin to move east Wednesday. As it does, a low will move in from the northwest. While the exact track this low ends up taking is not known with confidence at this time (the time frame involved is Thursday into next weekend), it appears there is enough agreement within the models to forecast a change to southeast winds sometime around Thursday.

After that, if the low drops far enough south, it may push a cold front through the state next Sunday or Monday. In the meantime, we`ll see a typical trade wind pattern of mainly windward and mauka showers, with a few making it over to leeward areas, due to the relatively strong winds. These showers will be most numerous at night and in the early mornings, as usual. Winds will gradually weaken from Tuesday into Wednesday.

Fire Weather:   Fire weather will remain below critical levels for the next several days. Drier air is forecast to move in Tuesday, but wind speeds will be on the decline by then, so we do not expect to meet criteria. The trade inversion should be between 6,000 and 7,000 feet.

https://www.weather.gov/images/hfo/graphics/npac.gif


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 Sunday evening: Robust surface high pressure centered far north of Hawaii will maintain fresh to strong trade winds at current strength for the next couple of days, and a Small Craft Advisory (SCA) remains in effect for all waters except windward Big Island through early Tuesday. Trades will steadily decrease late Tuesday and Wednesday as the high weakens and is displaced eastward by an approaching low far northwest of the islands. The SCA will likely be trimmed back to the typically windy waters around Big Island and Maui at that time. Trade winds will lower to gentle strength, or may become disrupted, as the low passes to the north Thursday and Friday.

A north-northwest swell and a smaller overlapping west-northwest swell will slowly decline through Monday and fade on Tuesday. A very small northwest swell may arrive Thursday, followed by a moderate north- northwest swell next weekend.

The current south swell will continue a slow decline over the next day or so. South shore surf will drop below seasonal average Monday and will remain relatively small through much of the week. A moderate south-southwest swell is expected next weekend.

Rough trade wind swell will produce east shore surf just above seasonal average through Tuesday, then decline later in the week as trade winds decrease.

 

>>> Highest Temperature Sunday, October 18, 2026 – 94 degrees at Bradley, CA


>>> Lowest Temperature Sunday, October 18, 2026 – 11 degrees at Angel Fire, NM

 

Diary Journal Notebook: Peaceful Hawaii Nature Beach Forest Vintage Hawaiian Art Aesthetic: Press, Goyoscribes: Amazon.com: Books


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 storm-force non-tropical low pressure area is developing along a frontal boundary tonight off the southeast coast of the United States. This low is likely to move slowly and erratically over the next couple of days while it initially remains non-tropical. Later this week, if the system stays over the Gulf Stream, environmental conditions could become more conducive for the low to develop some subtropical characteristics. A subtropical cyclone could form over the second half of this week as the system begins moving generally northeastward, offshore of the eastern United States. Regardless of development, 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…medium…40 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 220 miles west-northwest of Manzanillo, Mexico 

TRUDY STARTING TO WEAKEN RAPIDLY

According to the NHC advisory number 23 

Trudy is moving toward the northwest near 7 mph. A turn toward the west-northwest or west is expected tonight into Monday. On the forecast track, the center of Trudy will move further away from the coast of mainland Mexico during the overnight hours, then move south of Baja California Sur on Monday and Tuesday. Maximum sustained winds have decreased to near 80 mph with higher gusts. Rapid weakening is expected to continue tonight into Monday, and Trudy could degenerate to a post-tropical low by Tuesday night. Hurricane-force winds extend outward up to 25 miles from the center and tropical-storm-force winds extend outward up to 90 miles. The estimated minimum central pressure is 984 mb (29.06 inches).

cone graphic

 

>>> South of Southern Mexico:

An area of low pressure is developing well offshore to the south of the coasts of Guatemala and El Salvador. Environmental conditions appear conducive for gradual development of this system, and a tropical depression is expected to form around the middle of this week as the system moves westward to west-northwestward, remaining well south of the coasts of Central America and southern Mexico.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…high…90 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 258 NM west of Navsta Guam                                                                                                

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Tropical Cyclone 01P (Wati)…is located approximately 158 NM north of Rarotonga

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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:  MIT Farm Is Growing

Co-founders Aleks Bana? and Zachary Rapaport see architecture and farming as deeply complementary disciplines. Their nascent club is having a sizeable impact at the Institute.

“This tomato is blowing my mind,” says Nermine Hassanin. The MIT graduate student in architecture is marveling at the fruit in her salad.

She and several MIT School of Architecture and Planning classmates had spent their morning working at Hannan Healthy Foods Farm in Lincoln, Massachusetts, and then harvested the contents of the salad they were sharing at a picnic table: lettuce, kale, cucumbers, green onions, and tomatoes.

“It doesn’t get much fresher unless you’re eating this in the field,” responds Zachary Rapaport, a classmate and co-founder of MIT Farm, a community-driven program at MIT that is radically changing what it means to eat farm-fresh food on campus and gain practical experience in urban farming.

Read More: Massachusetts Institute of Technology (MIT)

Image: Zachary Rapaport (left) and Aleks Bana? move their farm cart across the MIT campus. The two graduate architecture students co-designed and built the cart.