Glenn James

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

 

The latest update to this website was at 639am Sunday morning HST


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

0.47  Mount Waialeale, Kauai
0.02  Kaala, Oahu
0.02  Molokai AP, Molokai
0.00  Lanai
0.25  West Wailuaiki, Maui
1.23  Honaunau, Big Island


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

18  Nawiliwili, Kauai – NE
22  Oahu Forest NWR, Oahu – ENE
25  Makapulapai, Molokai – ENE
35  Ukumehame Gulch, Maui – NNE 
38  Kealakomo, Big Island – NNE


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


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Variable clouds are present over the island chain 

 

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Localized Showers…not many 

 

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Please open this link to see details on any current Watches, Warnings and Advisories noted above




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Hawaii Weather Narrative
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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


Hawaii’s Weather Highlights
…as of Sunday morning:
Moderate trades will continue through Tuesday, bringing limited showers mainly for windward and mauka areas. An upper level low will help weaken winds and turn them out of the southeast Wednesday, and showers will increase as moisture increases. Heavy rainfall may occur late Wednesday through Friday.

Weather Narrative…as of Sunday morning: Isolated showers are occurring mainly over the windward and mauka locations, and trade winds were averaging 5 to 15 mph with a few gusts into the 20’s. Skies were partly to mostly cloudy windward and mostly clear leeward.

Look for this relatively dry trade wind pattern to continue through most of Tuesday. Showers will be confined mainly to windward and mauka areas. Wind speeds will be moderate, generally averaging 10 to 20 mph, with higher gusts. Late Tuesday, things may get more interesting.

The latest models continue to show a strong upper level low developing to our northwest late Tuesday night, as a trough cuts off. This will aid in the formation of a surface low approximately 900 miles to our northwest, and turn our surface winds out of the southeast.

As this deeper moisture moves in, heavy rain will become likely. The exact trajectory of this moisture is not known yet, with high confidence, but at this time it appears all the islands will be impacted. It will take a few more days for the models to converge on the location and evolution of the surface low, and that will help establish where the moisture is maximized.

Fire Weather: Moderate trades will continue into Tuesday and drier air will move in today. RH values are forecast to hover 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 morning: High pressure north of the Hawaiian Islands will produce moderate to locally fresh trade winds through Monday. The Small Craft Advisory for the windier waters and channels around Maui County and the Big Island has been extended through Monday afternoon. After this point, high pressure to the north begins to weaken and trade winds will start to diminish. By Wednesday, troughing developing northwest of the islands are increasingly likely to cause winds to veer out of the southeast. This is likely to be accompanied by increased shower activity for the latter half of the week.

Surf along south-facing shores will remain below average today. Forerunners from a new small, long-period south swell arrives today and will slowly fill in tonight and Monday, with a peak slightly above seasonal averages Tuesday into Wednesday. For the latter half of the week, surf near or slightly below average will be maintained by this fading swell, combined with a mix of new, small south swells.

Surf along north-facing shores becomes tiny today before another small, medium-period northwest swell arrives tonight and peaks on Monday, producing a small rise in surf lasting into Tuesday. Surf will continue to trend up for north shores as this will be followed by a slightly larger long-period northwest swell that peaks on Wednesday. Surf may approach moderate levels late week as medium-period northwest swell energy further increases. Surf along east facing shores will be choppy through Monday as a result of easterly trades.

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

 

>>> Highest Temperature Saturday, October 3, 2026 – 112 degrees near Santee, CA


>>>
Lowest Temperature Saturday, October 3, 2026 – 21 degrees near Big Bay, MI

 

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:

A broad area of low pressure could form in a few days over the southwestern Gulf of America. Some subsequent slow development of this system is possible while it drifts northward over the southwestern Gulf.

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

 

Northeast Pacific

Tropical cyclone 18E (Rachel) is located about 310 miles southwest of the southern tip of Baja CA

RACHEL STRENGTHENS A LITTLE MORE

According to the NHC advisory number 30 

Rachel is moving toward the west-northwest near 6 mph. A turn toward the west is expected later today, and that motion is forecast to continue through the middle of the week. Maximum sustained winds have increased to near 105 mph with higher gusts. Fluctuations in strength are possible today, but Rachel is expected to slowly weaken beginning on Monday. Hurricane-force winds extend outward up to 40 miles from the center and tropical-storm-force winds extend outward up to 125 miles. The estimated minimum central pressure is 965 mb (28.50 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:

Tropical Cyclone 15E (Nolo) is located about 325 miles west-southwest of Lisianski Island

NOLO STRENGTHENS MOVING QUICKLY WESTWARD …FORECAST TO CROSS THE INTERNATIONAL DATELINE WITHIN 12 HOURS

According to the NHC advisory number 56

Nolo is moving toward the west near 18 mph, and a general westward motion is expected to continue for the next few days. Nolo should cross the International Date Line later today in Hawaiian Time. Maximum sustained winds have increased to near 115 mph with higher gusts. Nolo is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Additional strengthening is forecast over the next day or so, before a weakening trend begins around the middle part of the week. Hurricane-force winds extend outward up to 35 miles from the center and tropical-storm-force winds extend outward up to 150 miles. The estimated minimum central pressure is 963 mb (28.44 inches).

cone graphic

 

Northwest Pacific Ocean:

Tropical Cyclone 26W(Choi-Wan)…is located approximately 320 NM east-southeast of Iwo To 

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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: 
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.