Glenn James

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

 

The latest update to this website was at 840pm Wednesday evening HST


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

0.02  Puu Opae, Kauai
0.16  Pupukea Road, Oahu
0.00  Molokai
0.03  Lanai 1, Lanai
2.60  West Wailuaiki, Maui
2.14  Kapapala, Big Island


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

15  Puu Lua, Kauai – ENE
30  Kuaokala, Oahu – NNE
21  Molokai AP, Molokai – NE
23  Lanai 1, Lanai – NE
27  Kealaloloa Rg, Maui – NNE
23  Puuloa, Big Island – NW


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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 Thunderstorms south in the deeper tropics


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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




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Hawaii Weather Narrative
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Glenn’s Wednesday comments:  I’m at home here in upper Kula, Maui, Hawaii

445am, it’s clear here at my place, the low temperature was 53 degrees, relative humidity is 75%…with calm winds

915am, mostly sunny here on Maui

230pm, variable clouds here on Maui, with sunny to partly sunny skies…with some localized cloudy areas.

444pm, cloudy with fog and light showers here in upper Kula.

844pm, the considerable afternoon cloudiness with showers have cleared for the most part, and as such, the temperature has cooled down to 60.9 degrees, with the relative humidity 75%

I heard on NPR yesterday that the world record pumpkin this year weighed 3,156 pounds…grown here in the United States!

 

Hawaii’s Weather Highlights…as of Wednesday evening: A high pressure system drifting slowly from west to east far north of the Hawaiian Islands over the next few days, will increase easterly trade winds into the moderate to breezy range lasting into the middle of next week. Brief pulses of enhanced showers are forecast with three passing easterly waves favoring the windward mountain areas in the overnight to early morning hours starting Friday night and lingering into next Tuesday morning.

Short Term Update: Three low level easterly waves will ride into the islands on the strengthening trade winds bringing pulses of higher shower coverage favoring Friday night, then late Saturday, and the last one from Sunday through Monday. The last of these easterly short wave troughs might be the strongest of the three, with pulses of showers extending over the typically drier leeward areas at times. Forecasting rainfall amounts with these waves is always challenging. due to variations in arrival timing and their intensity relative to each island.

Weather Narrative…as of Wednesday evening: Radar and satellite show scattered showers and mostly cloudy skies across the Puna and Kau districts of the Big Island. Skies were partly to mostly cloudy with showers over windward eastern Maui, and mostly sunny to partly sunny elsewhere. Winds were generally out of the east to northeast at 5 to 15 mph, except for locations downwind of terrain, where light west winds were common.

Forecast models are in good agreement that a series of surface high pressure systems will move west-to-east across the northern Pacific, giving us an extended period of trade winds. By early next week, surface troughing may develop as a strong upper level ridge develops to our north.

This troughing could lead to an increase in showers from late in the weekend into early next week, especially on the eastern end of the state. Confidence is not high at this time, as models are not in agreement on how much moisture may move into our area. Otherwise, expect a typical trade wind pattern, with windward and mauka showers, most numerous at night.

Fire Weather:  Moderate trade winds will strengthen to breezy levels Thursday. Dry air will keep RH levels at near-critical values each afternoon for parts of the state Friday through Sunday. RH values are expected to increase from Monday through the middle of next week. Winds will remain below critical thresholds. Inversion heights should range from about 5,000 to 6,000 feet through Thursday.

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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 Wednesday evening: Surface high pressure far northwest of the islands will move closer tonight and Thursday, then build as it moves to the north then northeast of Hawaii on Friday. As a result, trade winds will gradually increase to fresh to locally strong levels over the next couple of days. A Small Craft Advisory (SCA) has been issued for the typically windy waters around Big Island and Maui starting Thursday.

A stronger surface high will pass far north of the islands late Saturday and Sunday, likely increasing trade winds and possibly necessitating an expansion of the SCA to additional waters. Elevated trade winds will persist into early next week. The current northwest swell will continue a gradual decline through Thursday, followed by a moderate north-northwest swell Friday through the weekend.

The current swell has lowered and will slowly fall through Thursday. The next swell will be from the north- northwest and will arrive early Friday. Surf along north and west facing shores should top out around seasonal average during the peak of the swell Friday afternoon and Saturday, then slowly decline late Saturday and Sunday as the dropping swell shifts more northerly and a smaller overlapping northwest swell arrives. Both swells will fade early next week.

Surf along south facing shores will briefly fall near or just below seasonal average as the current south swell continues a slow decline tonight. A new long-period south swell will build Thursday and may push south shore surf back above seasonal average through Friday. The swell will slowly decline Saturday through early next week.

urf along east facing shores will remain small through Thursday and will steadily increase Friday as trade winds strengthen over the region. Rough trade wind swell will produce east shore surf above seasonal average Saturday through early next week.

 

>>> Highest Temperature Wednesday, October 14, 2026 – 102 degrees at Rio Grande Village, TX


>>>
Lowest Temperature Wednesday, October 14, 2026 – 10 degrees at White Sulphur Springs, MT

 

Discover the Endless Beauty of Hawaii Landscape Photography


World-wide Tropical Cyclone Activity

 



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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 210 miles west-southwest of Cabo Corrientes, Mexico

COMPACT SIMON WEAKENS TO A TROPICAL STORM…INTERESTS IN BAJA CALIFORNIA SUR SHOULD CONTINUE TO MONITOR THE CYCLONE

According to the NHC advisory number 31 

Simon is moving toward the southwest near 5 mph. The storm is likely to move slowly and erratically through Thursday night. A motion toward the north or northwest is forecast to begin by Friday. Maximum sustained winds have decreased to near 65 mph with higher gusts. Little change in strength is expected through early Thursday, followed by gradual weakening. Tropical-storm-force winds extend outward up to 35 miles from the center. The estimated minimum central pressure is 991 mb (29.27 inches).

cone graphic

 

Tropical cyclone 21E (Trudy) is located about 510 miles south-southeast of Manzanillo, Mexico

TRUDY FORECAST TO RAPIDLY STRENGTHEN OVER THE NEXT DAY OR SO…INTERESTS ALONG THE COAST OF SOUTHWESTERN AND WEST-CENTRAL MEXICO SHOULD CLOSELY MONITOR ITS PROGRESS

According to the NHC advisory number 7 

Trudy is moving toward the northwest near 8 mph. A turn toward the north-northwest and north is expected over the next couple of days, followed by a turn back toward the northwest this weekend. On the forecast track, Trudy is expected to approach the coast of southwestern and west-central Mexico this weekend. Maximum sustained winds have increased to near 70 mph with higher gusts. Rapid strengthening is forecast during the next couple of days, and Trudy is expected to become a major hurricane on Friday. Tropical-storm-force winds extend outward up to 105 miles from the center. The estimated minimum central pressure is 994 mb (29.36 inches).

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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 28W…is located approximately 155 NM south-southwest of Iwo To

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Tropical Cyclone 29W…is located approximately 950 NM east of Navsta, Guam

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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: 
UH Study Reveals How Tilapia Adapt to Extreme Salt Stress

In the world of aquatic life, the Mozambique tilapia (Oreochromis mossambicus) is remarkably tolerant to salt water, surviving in habitats ranging from fresh water to hypersaline ponds three times saltier than the ocean.

Researchers at the University of Hawaii at M?noa’s College of Tropical Agriculture and Human Resilience (CTAHR) have unlocked one of the molecular mechanisms underlying this remarkable feat. The study, published in General and Comparative Endocrinology, was led by Andre Seale, a researcher and professor in CTAHR’s Department of Human Nutrition, Food and Animal Sciences, alongside UH student researchers.

The team discovered how the fish survive under extreme salt stress by gradually increasing tank water salinity with artificial sea salt. Several fish species, including tilapia, need the hormone prolactin to prevent excessive water uptake and ion loss in fresh water, and turn it down when entering salt water. However, in extreme hypersalinity, prolactin signaling continues to be suppressed, while a continuous shift in the types of prolactin genes being expressed takes place.

This allows the fish to fine-tune their ability to to regulate salt and water balance even during transitions into salty environments.

Read More: University of Hawaii