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

 

The latest update to this website was Sunday morning at 512am HST


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

1.61  Mount Waialeale, Kauai
4.60  Oahu Forest NWR, Oahu
0.71  Puu Alii, Molokai
0.09  Lanai City, Lanai
1.84  Kahakuloa, Maui
1.23  Pahoa, Big Island


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

21  Lawai, Kauai – ENE
29  Oahu Forest NWR, Oahu – ENE
25  Molokai AP, Molokai – NE
21  Lanai 1, Lanai – ENE
22  Na Kula, Maui – NE
23  Kaloko-Honokohau, 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. 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

Lots of thunderstorms in the deeper tropics…cold front far northwest 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20261370630-20261371420-GOES18-ABI-HI-14-600x600.gif

Well developed cumulus and thunderstorms in the vicinity…otherwise variably cloudy with lower level clouds 

 

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https://radar.weather.gov/ridge/standard/PHKI_loop.gif

https://radar.weather.gov/ridge/standard/PHKM_loop.gif

Showers locally…some are heavy 

 

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




~~~ Hawaii Weather Narrative ~~~

 

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

It was mostly clear with some haze here this morning in Maui County, with a low temperature at my place 54 degrees…with the relative humidity 63%

1145am, it’s gradually getting more cloudy late this morning in Maui County, and the haze is still evident as well. The leeward sides of Maui remain mostly sunny, with small waves breaking.

1226pm, I’m beginning to see the cumulus clouds that are within sight from here at my place, showing some definite verticality. I would call them well developed cumulus clouds, although not quite cumulonimbus clouds.

345pm, a bank of fog is moving over my place here in upper Kula, although before it arrived I could see sunny to partly sunny skies down towards the coasts.

525pm, there’s low clouds rolling through up here in Kula, skimming the tree tops at times. I love this kind of weather, and am going to go get into it as I take my final walk of the day.

548pm, I’m just back from my walk, which I was lucky enough to get rained on some, nothing heavy, just some really nice large drops. The size of these drops lets me know that they are coming down from some well developed cumulus clouds that are over the slopes of the Haleakala Crater.

611pm, it just got through rain heavily, although it didn’t more than 5-minutes or so…nonetheless, it was a special few moments sitting here in my weather tower just watching and listening to it.

817pm, locally heavy rains are falling in several places across the state, with a flood advisory now active over the windward sides of Oahu and Maui.

 

April Showers Bring May Flowers to Hawaii - Revealed Travel Guides
The Jacaranda Trees are going off here in upcountry Kula, Maui


>>> Highest Temperature Saturday, May 16, 2026 – 108 degrees at Death Valley, CA
>>> Lowest Temperature Sunday, May 17, 2026 – 11 degrees near Mackay, ID

 

>>> Interesting Weather Web blog: Mauka Showers…2025-2026 Wet Season Numbers…And Here Comes El Niño!

 

Hawaii’s Broad Brush Weather Overview…as of Saturday evening: Light to moderate wet trades will continue through Sunday. Winds will increase in speed Monday, becoming moderate to occasionally breezy. Wet trades through Monday night will dry out somewhat Tuesday, and a rather typical trade pattern is forecast to continue from Tuesday into next weekend.

Short Term Update…as of Saturday evening:  The departing upper level low to the north managed to produce enough deep convection to induce a surface trough nearby. As a result, trades were briefly disrupted over Maui County and portions of the Big Island. As trades began to build back in around sunset, heavy showers developed along windward slopes of Oahu, Maui County, and northern Big Island. Expect this activity to gradually diminish as the night progresses.

Weather Details for the Hawaiian Islands…as of Saturday evening: Radar and satellite show numerous showers have been occurring over the state, mainly on Oahu and the eastern side of Big Island. Rainfall amounts have ranged from just a few hundredths of an inch up to 3 inches since sunrise today. Winds have been averaging 5 to 15 mph – generally out of the east windward and west leeward.

The upper level low that helped bring so much precipitation to parts of the state yesterday, continues to move away to the northeast as it weakens. We still have some instability, but it is significantly less so now. Ridging aloft to our northeast will be slightly weakened by troughing extending off the coast of the southwest mainland, but will still be strong enough to bring the trades back and keep them in place for at least the next week.

Initially, with precipitable water values near 1.5 inches, we will see plenty of trade wind showers. This will change Tuesday, when drier air is brought back into the region from the northeast. From Tuesday into at least next weekend, trade showers will be more typical in number and intensity. Wind speeds will generally average 5 to 15 mph Sunday, but increase Monday to 10 to 20 mph, with higher gusts. These moderate to occasionally breezy trades will then persist into next 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 Environmental Conditions…as of Saturday evening: Winds will remain slightly east southeasterly at moderate to fresh levels through the rest of the weekend. Meanwhile, increasing stability over the region will result in decreasing shower and thunderstorm coverage across the coastal waters. A more typical easterly trade wind pattern will return next week.

A small, medium-period north northwest (320-330 degree) swell will continue to decline through Sunday night, with surf along north- facing shores following suit. A medium-period north northwest reinforcement may provide another small bump in surf along north- facing shores by early morning on Monday, followed by another small reinforcing swell on Tuesday. Surf along west-facing shores will remain mostly steady through the rest of the weekend as the northwest swell influence gradually declines, but a new, long- period south southwest swell fills in.

A mix of small, medium- to long-period south swells will maintain small surf along south-facing shores for the next several days. The long-period south southwest swell described above will increase surf along south-facing shores through Sunday. Additional small, medium to long-period south swell reinforcements will arrive Sunday through mid-week.

Moderate to fresh trades will maintain rough and choppy surf along east-facing shores for the next several days. Tides will peak around 2.5 to 3.0 feet this weekend. Minor overwash of low lying coastal areas will be possible during times of high tide.

 

 

20 Best Kauai, Hawaii Beaches that Promise Amazing Views


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)

 

>>> Eastern Pacific: 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)

 

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

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

 

>>> Northwest Pacific Ocean:  There are no active tropical cyclone

>>> 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:  Protected Area Managers Across Europe are Adapting to Climate Change

New research shows how climate change is reshaping protected area management, though more funding and scientific knowledge are needed to facilitate the process.

The Natura 2000 network, the world’s largest network of protect areas, aims at protecting important species and habitats across the European Union. Its traditional approach to conservation has focused on maintaining ecosystems in their historical conditions, but in a world characterized by a changing climate this may not be possible anymore, requiring adapting the conservation strategies.

Researchers conducted a large-scale survey across Europe aimed at Natura 2000 protected area managers, to investigate how they perceive and address the effects of climate change on biodiversity. The survey was conducted as part of the Biodiversa+ Scenarios for Protecting European Avian Re-distributions (SPEAR) project focused on bird conservation, which involved partners from several European countries.

Read More at: University of Turku

Birds in a Natura 2000 protected area. Birds are highly responsive to environmental changes, making them important indicators of ecosystem health.