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

 

The latest update to this website was at 514pm Friday evening HST


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

0.34  N Wailua Ditch, Kauai
0.01  Tunnel RG, Oahu
0.01  Puu Alii, Molokai
0.00  Lanai
0.21  West Wailuaiki, Maui
2.64  Honolii Stream, Big Island


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

15  Waimea Heights, Kauai – SW
27  Kuaokala, Oahu – NNE
27  Molokai AP, Molokai – NE
04  Lanai 1, Lanai – SSW
25  Na Kula, Maui – NNE
24  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. 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

Cold front northwest…thunderstorm far south

 

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Variable low clouds…high cirrus in the vicinity as well

 

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…very few 

 

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

It’s mostly clear, with calm winds at my place, and with a low temperature of 50 degrees and the relative humidity is 82%

1230pm, my internet will be off this afternoon, so no new updates until likely around 4 or 5pm…I’ll begin updating again as soon as I can get connectivity / 306pm…I’m back online


>>> Highest Temperature Friday, June 12, 2026 – 119 at Death Valley, CA
>>> Lowest Temperature Friday, June 12, 2026 – 18 degrees near Mackay, ID

 

>>> Interesting Web Blog: Mauka Showers…Central North Pacific Tropical Cyclone Tracks in Strong El Niños, Part 2 – The Late Bloomer Years

 

Hawaii’s Broad Brush Weather Overview…as of Friday evening: Trade winds will weaken through Saturday, then gradually begin to strengthen Sunday into next week. Sea-breeze showers will develop Saturday and again Sunday in some leeward areas, before we return to mainly windward and mountain showers Monday through next week. There is a decent chance of increased moisture showing up toward the end of next week.

Weather Details for the Hawaiian Islands…as of Friday evening: Satellite shows partly to mostly cloudy skies over the islands…although with sunny areas too. Radar was showing showers over North Kona on the Big Island, but most of those have dissipated. Isolated showers were over South Puna and Kau Districts, but otherwise it was dry. Winds were mainly out of the northeast in windward areas, but otherwise highly variable in direction due to an abundance of sea-breezes, and were averaging 5 to 15 mph.

We`ll see a weak upper level low form to our northeast this weekend, then slowly weaken and move away through mid-week. At the surface, a weakened pressure gradient will lead to weak winds this weekend. There will be sea-breeze showers, especially Saturday afternoon and early evening, over some leeward areas. And of course the windward and mountain areas will still see their share of showers, too.

Trade winds will increase Sunday into Monday, then hold pretty steady into at least the middle of next week. This will bring an end to the stronger sea breezes, and return things to a more typical trade wind pattern, with showers mainly over windward and mountain areas.

Some of the latest model guidance suggests an area of enhanced moisture will move into the state Sunday night and perhaps hang around the area, close enough to supply additional moisture for showers through most of next week. But there is uncertainty in both how much moisture there will be and how long it will linger….stay tuned.

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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 Friday evening: Gentle to moderate east-northeasterly winds are expected through Saturday, as a weak front passing far north of the state keeps trade winds tempered. Moderate to fresh easterly trades will return Sunday through early next week, as a surface ridge strengthens north of the area.

Small pulses of southerly swell will bring somewhat below average surf to south facing shores today. Surf will begin to trend up on Saturday as forerunners from a large, long-period swell originating from southeast of New Zealand arrive. Surf is expected to peak Sunday into Monday, approaching warning levels, but most likely to remain at advisory levels. This swell will also coincide with the peak monthly tides which may lead to significant wave runup and minor coastal flooding during the first half of next week, particularly during the peak daily high tide cycles. South shore surf will remain elevated through much of next week, due to the slow decline of this large south swell and a series of continued overlapping southerly swells.

Very little swell energy is arriving along north facing shores today, keeping surf tiny to non-existent. A small bump in surf is possible along north and west facing shores with the arrival of a small northwest swell, and a smaller north swell early next week. Weaker than average trade winds near and upstream of the islands will produce below average surf along east facing shores through the weekend into early next week.

 

Hale O Lono Harbor and beaches Molokai Hawaii


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

 

>>> Gulf of America: There are no active tropical cyclones

Western Gulf: A broad low pressure area moving west-northwestward over the Bay of Campeche is accompanied by poorly organized showers and thunderstorms. Environmental conditions are forecast to be only marginally conducive for development before the system moves inland over eastern Mexico late Saturday or Sunday. The system could re-emerge over the northwestern Gulf on Tuesday and Wednesday while interacting with a frontal boundary, but there too, conditions are only expected to be marginally conducive for any development.

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

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

 

>>> Northeast Pacific: There are no active tropical cyclone

Tropical cyclone formation is not expected during the next 7 days.

 

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

Tropical cyclone formation is not expected during the next 7 days.

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

 

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

>>> 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: Efforts to Save Kelp Forests from Ocean Warming Are Ramping Up

At one time, kelp forests — which shelter fish, slow erosion, and sequester carbon — grew along a third of the world’s coastlines. Now, scientists are working to bolster heat-stressed kelp by attacking the urchins that prey on them and transplanting hardier kelp varieties.

In the coastal waters off British Columbia, tribal volunteers from the Haida Nation dive for purple sea urchins amid a dense forest of rippling golden-brown kelp fronds. Sunlight filters through the canopy, creating a mesmerizing dance of light and shadow, as rays and sea lions wend through the kelp maze, sharks glide past, and bright orange garibaldis dash between the swaying fronds.

Kelp forests are biodiversity hotspots teeming with a colorful variety of seaweeds, sponges, crustaceans, and other small ocean animals, many of them found nowhere else. At one time, vast kelp beds grew in nutrient-rich shallow waters along roughly a third of the world’s coastlines, where they helped to reduce the strength of waves, minimized coastal erosion, and provided shelter to fish, invertebrates, and marine mammals.

Today, however, many kelp forests are on life support, victims of water pollution from terrestrial agriculture and coastal development, bottom trawling for fish, and an explosion of kelp-devouring urchins, like those the Haida volunteers are collecting as part of an eradication program. But perhaps the most important driver of kelp decline is the rapid warming of the ocean.

Read More: Yale Environment 360