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

 

The latest update to this website was at 509pm Tuesday evening HST


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

1.38  Kilohana, Kauai
0.57  Manoa Lyon Aboretum, Oahu
0.15  Puu Alii, Molokai
0.00  Lanai
1.02  West Wailuaiki, Maui
2.91  Kawainui Stream, Big Island


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

37  Port Allen, Kauai – E
39  Kuaokala, Oahu – NE
32  Molokai AP, Molokai – NE
42  Lanai 1, Lanai – NE
54  Na Kula, Maui – SE
53  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

  Upper level low northwest…heavy thunderstorms far southeast

 

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Variable low clouds 

 

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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




~~~ Hawaii Weather Narrative ~~~

 

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

554am, it’s mostly clear here in upper Kula with calm winds, and a low temperature at my place of 51.5 degrees…with the relative humidity 75%

1230pm, just back from a shopping trip down to Mana Foods in Paia. It was raining off an on as I drove through the windward side area…from Paia to Makawao with a few sprinkles in Pukalani. Here in upper Kula, it’s quite sunny, although I can see that bank of low clouds towards the windward side from here at my place.

502pm, the long lasting bank of clouds along the windward sides remains in place, and has been there all day. These clouds are dropping off an on showers, in contrast to the dry conditions on the leeward sides.

 

>>> Highest Temperature Tuesday, July 7, 2026 – 117 at Death Valley, CA
>>> Lowest Temperature Tuesday, July 7, 2026 – 32 degrees at Angel Fire, NM

 

Hawaii’s Weather Highlights…as of Tuesday evening: Strong high pressure far north of the state will continue to produce breezy to windy trades for the remainder of the week  into the weekend. Showers will primarily focus along windward and mountain areas. However, an increase in shower coverage and frequency is anticipated later this week into the weekend, with higher rain accumulations likely occurring during the nocturnal hours.

Weather Commentary…as of Tuesday evening: Current radar and satellite imagery shower scattered showers moving into windward and mountain areas on the trade wind flow, with more moisture focused over the eastern end of the state. This has been the short term trend with consistent rainfall over the northeast-facing coastal areas of the Big Island, bringing 2 to 3+ inches of rain to those areas in the last 24 hours, whereas elsewhere across the state, windward areas have only seen a few hundredths to a couple of tenths of an inch over the same period.

Strong high pressure centered far north of the state will continue to generate breezy to windy trades through the weekend. The typical windier areas across Maui County and the Big Island continue to flirt with Wind Advisory conditions, with a few sites touching 30 mph sustained at times and consistently gusting to 40 mph. Elsewhere, winds have been around 20 mph gusting to 30 mph. Looking aloft, Hawaii will remain under weak ridging through early next week, as it lies between two upper-level lows, one to the east, the other to the west.

The breezy to windy trades will generally focus clouds and showers over windward and mountain areas. However, batches of deep tropical moisture will move across the area Wednesday night through Friday night, again Sunday into Monday, and more will follow next week. As these batches of deeper moisture move through with precipitable water values reaching 1.5 to 2 inches, the inversion will weaken and lift, increasing shower coverage and frequency across the state. In addition to the potential for an increase in shower activity, dew points will be on the rise, leading to muggier conditions through the weekend.

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 Tuesday evening: Strong high pressure remains centered north of the state, which is driving fresh to strong trade winds across all coastal waters. An advanced scatterometer pass from late morning revealed that these winds are still in place over large portions of the area, and although winds may shift a bit more easterly and ease slightly, decided to continue the Small Craft Advisory through tonight. A few local waters may be dropped out of the Small Craft Advisory by Wednesday, but most areas are likely to see an extension in time of the SCA through the next several days.

A moderate, medium- to long-period south-southwest (190-200 degrees) swell continues to generate moderate surf below advisory criteria along south facing shores. This swell energy will gradually lower through the remainder of the week. Expect small surf for south facing shores leading into this weekend. Another moderate, long-period south-southwest swell (210-220 degrees) is expected to fill in Sunday, but due to the direction of the source, could be more inconsistent than the current swell.

Surf along east facing shores will remain rough and choppy through the week, as fresh to strong trades hold. A small, moderate period west (280 degrees) swell is expected to arrive this weekend and linger into early next week. No significant swells are expected out of the north or northwest.

Looking ahead, higher than normal high tides will be possible beginning during the second half of the upcoming weekend. Interests immediately along the coasts in low-lying or vulnerable areas should continue to monitor forecasts for possible coastal flooding due to the King Tides from Sunday through the first half of next week.

 

Scientists are Rebuilding Hawaii's Beautiful Native Forests | Discovery


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: There are no active tropical cyclones

>>> Offshore of Southwestern Mexico:

A low pressure system is expected to form late this weekend or early next week several hundred miles south of the coast of southwestern Mexico. Gradual development is possible after that time as the system moves west-northwestward.

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

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

 

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

A trough of low pressure located well to the southeast of the Hawaiian Islands is currently producing disorganized showers and thunderstorms. Environmental conditions appear favorable for additional development of this system later this week into the weekend, and a tropical depression could form by that time as the system moves westward to west-northwestward across the central Pacific, remaining south of the Hawaiian Islands.

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

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

 

>>> Northwest Pacific Ocean: 

Tropical Cyclone 09W (Bavi)…is located approximately 674 NM south-southeast of Kadena AB

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

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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

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



Interesting:  Study Reveals How Giant Trees in Tropical Forests Transport Water to Their Uppermost Branches

The study published in Science helps us understand the role of this little-studied type of vegetation in climate change. One percent of the tallest trees store more than half of the carbon in tropical forest ecosystems.

The giant trees of tropical forests are important allies in the fight against climate change due to their ability to store carbon, yet they are still poorly understood by science. However, a study published July 2, 2026, in the journal Science reveals a crucial survival mechanism: these trees, which exceed 70 meters in height, have no difficulty transporting water to their tops and are no more vulnerable than smaller trees.

They have developed internal adaptations that compensate for the challenges of transporting water to the highest branches. Furthermore, tests conducted during severe droughts showed that they did not experience a more pronounced decline in growth compared to smaller trees. This contradicts the hypothesis that very tall trees would be more susceptible to water stress.

To date, the scientific literature suggests that as trees grow taller, their ability to move water upward is impaired by the greater distance between roots and leaves, as well as by the effects of gravity. This would reduce photosynthesis, limit growth, and increase vulnerability to drought.

Read More: Fundação de Amparo à Pesquisa do Estado de São Paulo

Image: Bottom view of a 61-meter-tall dipterocarp with a tree climber at the top