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

 

The latest update to this website was at 836pm Saturday evening HST


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

1.32  Mount Waialeale, Kauai
0.25  Tunnel RG, Oahu
0.10  Puu Alii, Molokai
0.05  Lanai City, Lanai
0.66  West Wailuaiki, Maui
0.52  Kawainui Stream, Big Island


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

31  Port Allen, Kauai – E 
32  Kuaokala, Oahu – SW
32  Molokai AP, Molokai – NE
m  Lanai – m
44  Na Kula, Maui – ESE
38  Puuloa, 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 (out of operation). 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

 Thunderstorms south in the deeper tropics

 

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Low clouds arriving on the trade winds…higher clouds coming up from the southwest at times

 

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

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

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

Localized showers 

 

https://www.weather.gov/wwamap/png/hfo.png

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

502am, it’s mostly clear here in upper Kula with calm winds, and a low temperature at my place of 55 degrees…with the relative humidity 84%

The warm tropical waters of the Earth’s oceans are very active with tropical cyclones now…and with areas that could become tropical cyclones! There are hints that we could see something coming our way later in the upcoming new week…more information on that possibility here:

Central North Pacific: There are no active tropical cyclones

A tropical wave located more than 1000 miles east-southeast of the Hawaiian Islands, is producing a large area of disorganized showers and thunderstorms. Environmental conditions are forecast to be conducive for further development, and a tropical depression is expected to form in a few days, while the system moves west-northwestward across the Central Pacific.

* Formation chance through 48 hours…low…30 percent
* Formation chance through 7 days…high…90 percent

 

>>> Highest Temperature Saturday, August 8, 2026 – 124 degrees at Death Valley, CA

>>> Lowest Temperature Saturday, August 8, 2026 – 29 degrees near Bynum, MT

 

Interesting weather blog: Mauka Showers…Sea Breeze Variations in the Big Island’s South Kohala District

 

Hawaii’s Weather Highlights…as of Saturday evening: Breezy trades will focus low clouds and showers over windward and mauka areas through the middle of the upcoming new week. A plume of moisture moving south of the islands will increase rain chances at times across the eastern end of the state through Monday, then drier conditions are expected through mid-week. Brewing western East Pacific disturbances within the tropics will need to be monitored for more organized development the next several days.

Weather Narrative..as of Saturday evening: High pressure to the far northeast and a weak trough approaching from the southeast, will continue to generate breezy trades across the state this weekend. Satellite imagery shows mostly dry conditions persisting across the western half of the state, along with some passing high cirrus, and increasing low cloud and shower coverage over the eastern end. These clouds and showers moving into windward slopes of the Big Island marks the leading edge of a larger plume of moisture associated with the aforementioned westward-moving surface trough passing south of the state this weekend.

Some of this moisture may track up the island chain to increase windward and mountain showers across Maui, Molokai, and possibly Oahu tonight into Sunday, though the highest rain chances remain centered over the Big Island. Forecast soundings indicate modest instability over the Big Island tomorrow. Combined with increasing tropical moisture and daytime heating, this may produce an isolated thunderstorm or two over interior slopes during the afternoon hours.

As the pressure gradient relaxes slightly in response to the surface trough weakening and moving farther westward away from the state, moderate to breezy trades are expected Monday through about Thursday. Drier air will fill in across the island chain by mid-week, dropping dew points and providing some relief from the mugginess.

Beyond Thursday, forecast confidence decreases, as local weather will depend on the possible development and progression of a tropical cyclone into the Central Pacific. The National Hurricane Center is monitoring a trough of low pressure about 1,400 miles east-southeast of the state, assigning an 80 percent probability of tropical cyclone development over the next 7-days. While it remains too early to discuss specific local impacts, this feature warrants close monitoring over the coming days.

 

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 Saturday evening: Fresh to locally strong trades will continue over the next several days, as an established area of high pressure remains anchored to the northeast of the state. A Small Craft Advisory has been extended through Sunday morning for the locally strong trades across the typical windy channels and waters around Maui County and the Big Island. This advisory may need to be extended even further out in time, as fresh to locally strong trades continue through most of next week.

A series of small, medium- to long-period, south swells will maintain surf near seasonable norms this weekend into early next week along south facing shores. A moderate, long-period south swell will peak by mid next week, and help elevate surf to near High Surf Advisory thresholds.

Along east-facing shores, expect choppy trade wind swell through this weekend, as fresh to locally breezy trades persist. Surf along north-facing shores will remain flat to tiny, though a small, medium-period north swell could bring a slight bump on Sunday.

Due to a combination of peak monthly high tides and water levels running higher than predicted, minor coastal flooding is possible around the daily peak tide during the afternoon hours, late this weekend into early next week along vulnerable shoreline areas.

 


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

Central Tropical Atlantic:

A tropical wave is located a few hundred miles southwest of the Cabo Verde Islands. Some gradual development is possible during the early to middle part of next week while the system moves westward across the central tropical Atlantic. Upper-level winds are expected to become much less conducive for development later in the week when the system approaches the Lesser Antilles.

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

 

Eastern and Central Tropical Atlantic:

Another tropical wave is expected to move off the west coast of Africa on Tuesday. Some development of this system will be possible during the middle to latter part of next week while it moves westward across the eastern and central tropical Atlantic.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…30 percent

 

>>> Caribbean Sea: There are no active tropical cyclones

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

>>> Gulf of America: There are no active tropical cyclones

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

 

Northeast Pacific: There are no active tropical cyclones

 

>>> Western East Pacific:

A tropical wave located several hundred miles southwest of the southern tip of the Baja California Peninsula is also producing a large area of disorganized showers and thunderstorms. Environmental conditions are forecast to be conducive for gradual development, and a tropical depression could form by midweek while the system moves slowly west-northwestward to northwestward across the western portion of the East Pacific.

*Formation chance through 48 hours…low…10 percent
*Formation chance through 7 days…medium…50 percent

 

>>> Southwest of Mexico:

An area of low pressure could form well offshore of the southwestern coast of Mexico by the middle of next week. Only limited development of this system is anticipated thereafter as it moves generally west-northwestward.

*Formation chance through 48 hours…low…near 0 percent
*Formation chance through 7 days…low…10 percent

 

Central North Pacific: There are no active tropical cyclones

A tropical wave located more than 1000 miles east-southeast of the Hawaiian Islands is producing a large area of disorganized showers and thunderstorms. Environmental conditions are forecast to be conducive for further development, and a tropical depression is expected to form in a few days while the system moves west-northwestward across the Central Pacific.

* Formation chance through 48 hours…low…30 percent
* Formation chance through 7 days…high…90 percent

 

>>> Northwest Pacific Ocean:

https://www.metoc.navy.mil/jtwc/products/abpwsair.jpg

Tropical cyclone 12W (Dolphin)…is located approximately 186 NM north-northeast of Taipei, Taiwan

https://www.metoc.navy.mil/jtwc/products/wp1226.gif

Tropical cyclone 14W (Chan-hom)…is located approximately 589 NM east-southeast of Yokosuka, Japan

https://www.metoc.navy.mil/jtwc/products/wp1426.gif

 

>>> Southwest Pacific Ocean: There are no active tropical cyclones

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

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



Interesting: Indoor Air Quality: Heat and Wildfire Smoke Leave Households with Hard Choices, Find Researchers

Being inside with the windows closed does not completely protect you from the smoke caused by wildfires, early findings by University of Manchester researchers suggest.

And opening windows during hot weather, they show, almost certainly exacerbates the problem of indoor air pollution caused by the fires.

The University’s Cystic Fibrosis Hub Air Quality Research team analyzed real time indoor air-quality records from 23 Greater Manchester homes monitored between 1 and 26 July 2026, during two periods of wildfire activity in the nearby Pennine hills.

Every monitored home in the Cystic Fibrosis Trust funded study exceeded the World Health Organization’s 24-hour guideline for fine particle pollution on 17 July, when outdoor smoke levels peaked.

Read More: University of Manchester