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

 

The latest update to this website was at 822pm Sunday evening HST


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

0.40  Mount Waialeale, Kauai
0.13  Kaala, Oahu
0.09  Puu Alii, Molokai
0.00  Lanai
0.25  West Wailuaiki, Maui
1.20  Honaunau, Big Island


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

31  Port Allen, Kauai – NE
33  Kuaokala, Oahu – NE
30  Molokai AP, Molokai – NE
39  Kealaloloa Rg, Maui – NE 
38  Waikoloa 2, Big Island – NNW


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.


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

   Hurricane Nolo far west-northwest of Hawaii…Hurricane Rachel far east towards Mexico


https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20262772150-20262780540-GOES18-ABI-HI-14-600x600.gif

Variable clouds are present over the island chain 

 

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…not many 

 

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

457am, it’s mostly clear here at my place, the low temperature 52 degrees, relative humidity is 82%…with calm conditions

1207pm, mostly sunny with some partly sunny areas here and there…here in Maui County.

250pm, still sunny to partly sunny in many areas here on Maui, although it’s cloudy with some passing showers along the windward sides this afternoon.

 


Hawaii’s Weather Highlights…as of Sunday evening: Breezy trades will continue through Monday, bringing limited showers mainly to windward and mauka areas. An upper level low will help weaken winds and turn them out of the south Wednesday. Showers will increase as moisture increases with the potential for heavy rain across Hawaii.

Weather Narrative…as of Sunday evening: High pressure north of Hawaii and a weak disturbance passing to the south, will result in breezy trade winds and stable weather through Monday. Scattered low clouds and isolated showers will move through the trade wind flow, and primarily impact windward slopes, but rainfall accumulations will remain light.

Winds will weaken and veer southeasterly by late Tuesday, and south by Wednesday, as a sharp trough approaches from the northwest. A surface low will form along the trough and southerly winds will draw deep tropical moisture over the islands, while a cold pool aloft associated with the upper low will act to destabilize the atmosphere over the state.

As this deeper moisture moves in, heavy rain will become likely. The timing and location of the moisture is depicted slightly different in the long range models, but at this time it appears all the islands will be impacted at some point. Thus, not getting too specific yet, but expect an overall wetter pattern and southerly winds from around late Wednesday through at least Friday, and possibly lingering into next weekend.

Fire Weather:  Breezy trades will continue into Tuesday with relative humidity values just above the critical threshold for fire weather each afternoon through Tuesday. Fire weather risk then diminishes through the remainder of the week as moisture increases, winds decrease, and showers increase in coverage. The inversion should range from 6-8,000 feet through Monday.

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: High pressure north of the Hawaiian Islands will maintain fresh to locally strong trade winds through Monday. The Small Craft Advisory for the windier waters and channels around Maui County and the Big Island remains in effect through Monday afternoon. Thereafter, high pressure to the north weakens and trades will start to diminish. Troughing developing northwest of the islands will likely to cause winds to veer out of the southeast around midweek and bring increased shower activity for the latter half of the week.

A new small, long-period south swell will slowly fill in tonight and Monday, with a peak slightly above average Tuesday into Wednesday. Near or slightly below average surf will hold through the rest of the week be maintained by a mix of new, small south swells.

A small, medium-period northwest swell will arrive tonight and peak Monday, producing a small bump in surf through Tuesday. Surf will continue to trend up for north shores as a slightly larger long-period northwest swell peaks Wednesday. Surf may approach moderate levels late in the week as a medium-period northwest swell further increases. Surf along east facing shores will be elevated and choppy through Monday due to the locally strong trades.

A small, long-period west swell originating from Typhoon Choi-wan is forecast to reach the islands Thursday into the weekend, which may produce moderate surf for west-facing shores of the Big Island.

 

>>> Highest Temperature Sunday, October 4, 2026 – 110 degrees at Death Valley, CA


>>> Lowest Temperature Sunday, October 4, 2026 – 19 degrees near Bynum, MT

 

1,294 Plumeria Hawaii Beach Stock Photos - Free & Royalty-Free Stock Photos from Dreamstime


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 cyclone


Caribbean Sea: There are no active tropical cyclones


Gulf of America: There are no active tropical cyclones

>>> Southwestern Gulf of America:

An area of low pressure is likely to form around the middle of the week over the southwestern Gulf of America. Although environmental conditions are only expected to be marginally conducive, some slow development is possible and a tropical depression could form late this week while the system drifts northward.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…40 percent

 

Northeast Pacific

Tropical cyclone 18E (Rachel) is located about 365 miles west-southwest of the southern tip of Baja CA

RACHEL CONTINUES TO MOVE OVER THE OPEN EASTERN PACIFIC OCEAN

According to the NHC advisory number 32 

Rachel is moving toward the west-northwest near 7 mph. A continued slow motion is expected for the next several days. Maximum sustained winds have decreased to near 100 mph with higher gusts. Fluctuations in strength are possible overnight, but Rachel is expected to slowly weaken starting Monday. Hurricane-force winds extend outward up to 40 miles  from the center and tropical-storm-force winds extend outward up to 140 miles (220 km). The estimated minimum central pressure is 967 mb (28.56 inches).

cone graphic

 

>>> South of Southern Mexico:

A broad area of low pressure is forecast to develop over the next day or so just to the south of the Gulf of Tehuantepec. Thereafter, environmental conditions appear favorable for gradual development, and a tropical depression is expected to form during the middle to latter portion of the week while the system moves slowly west-northwestward to northwestward, just offshore of the southern to southwestern coast of Mexico.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…high…90 percent

 

Central North Pacific:

 

Northwest Pacific Ocean:

Tropical Cyclone 15E (Nolo) is located about 794 NM northwest of Johnston Islan

https://www.metoc.navy.mil/jtwc/products/ep1526.gif

 

Tropical Cyclone 26W(Choi-Wan)…is located approximately 284 NM east of Iwo To 

https://www.metoc.navy.mil/jtwc/products/wp2626.gif

 

Tropical Cyclone 27W(Koguma)…is located approximately 109 NM north of Kwajalein

https://www.metoc.navy.mil/jtwc/products/wp2726.gif

 

Southwest Pacific Ocean: There are no active tropical cyclones

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

 

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

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



Interesting:  Devastating Year for Switzerland’s Glaciers

Glaciers are melting faster than ever before in Switzerland. New measurement data shows that Swiss glaciers lost more than 5 per cent of their volume in 2026, following a winter with little snow and record-breaking summer heatwaves.

Switzerland’s glaciers lost more than five per cent of their ice volume in 2026. While, overall, the record melt rates of 2022 were not quite reached, on average, glacier thickness decreased by 2.5 to 4 metres this year, and some glacier tongues lost up to 10 metres of ice.

The Rhône, Aletsch, and Clariden glaciers, among others, experienced their greatest melt on record in 2026. Several smaller glaciers disappeared completely and permanently, including Bella Tola in the canton of Valais and Griessfirn in canton Glarus. Nearly 20 per cent of Switzerland’s glacier volume has disappeared in the past five years alone. The new data highlights how rapidly Switzerland’s glacier landscape is changing.

Read More: ETH Zurich

The Claridenfirn glacier in canton Glarus is completely free of snow in September 2026.