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

 

The latest update to this website was at 450am Saturday morning HST


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

2.89  Mount Waialeale, Kauai
0.73  Manoa Lyon Arboretum, Oahu
0.08  Puu Alii, Molokai
0.00  Lanai
0.63  Puu Kukui, Maui
2.35  Kealakekua, Big Island


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

29  Port Allen, Kauai – E
39  Kuaokala, Oahu – EN
28  Makapulapai, Molokai – ENE
35  Lanai 1, Lanai – NE
37  Kealaloloa Rg, Maui – NE
30  Waikoloa, 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

 Post–Tropical Cyclone 04E (Douglas) far east 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20261850550-20261851340-GOES18-ABI-HI-14-600x600.gif

Variable low clouds…higher clouds arriving over the islands from the west…with an area of clouds approaching the state from the east

 

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

443am, it’s partly cloudy here in upper Kula with calm winds, and a low temperature at my place of 53 degrees…with the relative humidity 80%

 

>>> Highest Temperature Friday, July 3, 2026 – 110 near Tecopa, CA
>>> Lowest Temperature Saturday, July 4, 2026 – 23 degrees at Angel Fire, NM

 

Interesting web blog: Mauka Showers…Hawaii’s Dry Season – Overall Trends

 

Hawaii’s Weather Highlights…as of Friday evening: Moderate to breezy trade winds will prevail through the week as high pressure holds far north of the islands. Stable conditions will focus limited showers over windward and mountain areas through at least the middle of next week.

Weather Commentary…as of Friday evening: A high pressure system is centered roughly 1300 miles north of Kauai, while a ridge aloft remains over the state. As a result, a moderate to breezy and stable trade wind flow persists across the island chain.

Shallow batches of moisture are currently affecting windward Kauai and Big Island, where a quarter to a half inch of rainfall has been observed during the past six hours. Less than a quarter of an inch of rain was measured on windward Maui County and Oahu during this time, and all leeward areas have been dry. Expect continued modest windward rainfall through tonight, followed by slightly drier conditions Saturday.

A slight increase in the breezy trade winds is expected by Sunday, as the high to the north builds to around 1034 millibars. Stable conditions will persist, limiting shower activity to windward and mountain areas. A somewhat drier air mass will push leeward dew points into the low to mid 60’s as early as Saturday afternoon, leading to daytime minimum relative humidity around 45 per cent through at least to the middle of next week.

Remnant moisture from Post-Tropical Cyclone Douglas may reach the state on continued breezy trades, and cause an increase in shower activity late Thursday or next Friday.

Fire Weather… Moderate to locally near critical fire weather conditions are expected to develop during the weekend, and will persist through early next week. High pressure north of the state will produce locally breezy trade winds, with the strongest winds expected to develop Sunday or Monday. A slightly drier air mass will move in on Saturday, causing relative humidity to fall to around 45 per cent each afternoon. Fuel conditions will remain below the critical threshold.

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 Friday afternoon: A surface high pressure far north of the islands will maintain moderate to locally strong trade winds. A Small Craft Advisory (SCA) for the typical windy waters and channels around Maui County and the Big Island has been extended into the weekend. The SCA will likely remain in place through the forecast period, as the high remains nearly stationary, with minor fluctuations in strength.

Forerunners of a small, long period south swell are filling in will peak tonight into Friday. This swell will help maintain near to just below summertime average surf along south facing shores into the weekend. A moderate, long period south-southwest swell will fill in Saturday afternoon and evening, boosting surf heights to near High Surf Advisory levels Sunday and Monday. This swell will slowly fade Tuesday through the middle of next week.

Surf along east facing shores will remain rough and choppy through the forecast period, as moderate to locally strong trades hold. Surf along north facing shores will remain tiny into Friday, with a minor uptick Friday afternoon into the holiday weekend, as a small, medium period northwest swell arrives. Tiny to near flat conditions for north facing shores will return next week.

 

Sean MacDonald A landscape of green showing large pink multi-branched plants in the foreground, a spiky small hill covered in trees in the mid-ground and a mountainous ridge in the background (Credit: Sean MacDonald)


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

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

>>> 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.

Here’s the link to the National Hurricane Center (NHC)

 

>>> Northeast Pacific: 

Western East Pacific:

>>> A tropical wave located several hundred miles to the southwest of the coast of southwestern Mexico is producing disorganized shower activity. Development of this system appears unlikely as it moves westward across the central and western portions of the East Pacific basin during the next several days.

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

Here’s the link to the National Hurricane Center (NHC)

 

>>> Central Pacific: There are no active tropical cyclone

Here’s the link to the Central Pacific Hurricane Center (CPHC)

 

>>> Northwest Pacific Ocean: 

Tropical Cyclone 09W (Bavi)…is located approximately 315 NM east of Andersen AFB

https://www.metoc.navy.mil/jtwc/products/wp0926.gif

 

Tropical Cyclone 10W (Maysak)…is located approximately 108 NM east of Hanoi, Vietnam

https://www.metoc.navy.mil/jtwc/products/wp0926.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:  The Miracle Microbes That Could Save Crops From Impact of Rising Sea Levels

Researchers at the University of East Anglia have helped uncover a hidden ally in the fight against one of agriculture’s greatest threats – salty soil.

Led by Chinese collaborator Dr Yanfen Zheng, a new study shows how naturally occurring soil bacteria can dramatically boost plants’ ability to survive in salty conditions.

The findings reveal a previously unknown mechanism by which microbes help plants – including maize, tomato and rapeseed – survive in harsh environments.

It is hoped that the breakthrough could have major implications for agriculture worldwide by helping crops survive in soil that would otherwise be unusable.

Read More: University of East Anglia