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

 

The latest update to this website was at 834pm Sunday evening HST


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

2.04  N Wailua Ditch, Kauai
0.04  Kahuku TA, Oahu
0.00  Molokai
0.00  Lanai
0.03  Kula AG, Maui
0.74  Puuanahulu, Big Island


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

16  Port Allen, Kauai – ESE
17  Kalaeloa, Oahu – SE
20  Anapuka, Molokai – NE
28  Na Kula, Maui – ESE
25  Kealakomo, Big Island – E


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 (currently out of service). 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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A low pressure system to the northwest


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Clear to variable cloudy over the island chain 

 

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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

436am, it’s clear here at my place, the low temperature was a cool 51.5 degrees, relative humidity is a very dry 53%…with calm winds

1112am, very sunny, what I’d call a pristine early autumn day here in the tropics.

509pm, here on Maui we have variable cloudiness with some clear blue skies too…as the weekend winds down.

 

Interesting Weather Blog: Mauka Showers…Beware of Tropical Cyclone Tails!

 

Hawaii’s Weather Highlights…as of Sunday evening:  Light to moderate trade winds prevail, allowing sea breezes to develop in sheltered leeward areas each day. A brief increase in windward showers is expected Monday night into Tuesday, especially for the easternmost islands. Moderate trade winds will begin building back during the second half of the week, becoming locally breezy again by next weekend.

Weather Narrative…as of Sunday evening: Mostly to partly cloudy skies are observed across much of the smaller islands, with the exception of over sheltered leeward locations due to localized sea breezes. Over the Big Island, typical interior cloud buildups have also developed, with only a few light showers noted and little in the way of rainfall accumulations. Precipitable Water imagery shows much drier air over the state compared to recent days.

A weak low in the mid and upper levels is located just east of the Big Island. Over the next few days, this feature will linger and then move off to the northeast, with little effect on island weather. However, an area of enhanced moisture associated with a trough east of the islands will make its way westward, reaching the eastern end of the state by Monday night. As this feature quickly moves through, windward showers are anticipated to increase, especially for the Big Island and Maui. The remaining islands may see a slight increase in windward and mauka showers as well.

By Wednesday, a moderate trades will build back into our area, strengthening to become locally breezy by the end of the week. Showers will generally favor windward and mauka areas throughout the rest of the week, especially during the overnight through morning periods. An additional band of moisture approaching from the east could bring another uptick in showers late this week into next weekend.

Fire Weather:  Light to moderate trades will be with us into the middle of the coming week. Moisture will decrease today through Monday, bringing RH values down to near critical values on parts of the Big Island Monday, including near Kona. However, winds will too be light for any fire weather problems. Inversion heights are around 5,500-6,500 feet across the eastern end of the state.

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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 Sunday evening: Moderate to fresh trade winds continue, though weaker winds will remain in place over the western waters as a trough lingers west of the area. Trade winds then decrease this upcoming week into the light to moderate range through much of the week, with slight day to day fluctuations. Strengthening trades are possible towards the end of the week, as high pressure builds north of the area.

A long-period south swell will peak today and hold through Monday, producing elevated surf along south and west-facing shores, but it will remain below advisory levels. South shore surf will decline gradually Tuesday into Wednesday, but a new long-period south swell arriving late Wednesday, will provide another rise in surf for Thursday and Friday.

The short-period north-northwest swell generated by low pressure to the northwest of the islands will fade today, while a new small, long-period swell peaks. This will keep small surf continuing today for north-facing shores, but surf declines on Monday as this swell fades. Another small, long-period northwest swell is forecast to arrive on Monday and peak Tuesday, which will boost north shore surf back to moderate levels. A moderate north-northwest swell is possible by the end of the week, depending on the evolution of a projected low in the north Pacific. However, confidence is low given differences in model solutions with this feature.

Surf along east-facing shores will remain small as local winds remain fairly weak, with only slight variations each day. Small, moderate-period west and east swells, generated by multiple Pacific tropical cyclones, continue to move across the islands through Monday.

 

>>> Highest Temperature Sunday, October 11, 2026 – 98 degrees at Rio Grande Village, TX


>>> Lowest Temperature Sunday, October 11, 2026 – 11 degrees near Kirk, OR

 

Beach Landscapes. ocean meets the forest Hawaiian inspired. free to use


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


Caribbean Sea: There are no active tropical cyclones


Gulf of America: There are no active tropical cyclones

 

Northeast Pacific

Tropical cyclone (Simon) is located about 125 miles west-northwest of Manzanillo, Mexico

SIMON MOVING SLOWLY JUST OFFSHORE OF WEST-CENTRAL MEXICO …THREAT OF DESTRUCTIVE WINDS AND FLOODING RAINS CONTINUES ALONG THE COAST

According to the NHC advisory number 19 

Simon is moving toward the northwest near 5 mph, and this general heading is expected to continue into early Tuesday. A turn toward the northeast is forecast thereafter, and Simon is expected to move inland across west-central Mexico around midweek. Maximum sustained winds are near 120 mph with higher gusts. Simon is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Slow weakening is forecast, but Simon is expected to remain a hurricane through midweek. Rapid weakening is likely after Simon moves inland. Hurricane-force winds extend outward up to 15 miles from the center and tropical-storm-force winds extend outward up to 60 miles. The estimated minimum central pressure is 956 mb (28.23 inches).

 

>>> South of southern Mexico:

A tropical wave over the far eastern part of the east Pacific is producing disorganized showers and thunderstorms. Environmental conditions are expected to be conducive for gradual development, and a tropical depression is expected to form well south of southern Mexico by the middle or latter half of the week as the system moves generally west-northwestward at around 10 mph.

* Formation chance through 48 hours…medium…40 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 27W (Koguma)…is located approximately 571 NM southeast of Yokosuka, Jpan

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Tropical Cyclone 28W…is located approximately 378 NM east-northeast of Andersen AFB 

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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:  Warning on Quality of Rainwater

Rainwater tanks are a popular way for Australians to save water, but new research has found they can also harbor potentially harmful bacteria and metals that could pose health concerns.

Researchers from Adelaide University and Flinders University tested rainwater from 100 household tanks across Adelaide and the Adelaide Hills, finding bacteria linked to gastroenteritis and other infections in a number of tanks.

The study found Campylobacter bacteria in 13% of tanks, Salmonella in 10%, Shigella in 3% (all linked to gastroenteritis) and Pseudomonas aeruginosa (which causes other infections) in 12%. Bacteria were also detected in tanks used for drinking water.

Read More: Flanders University