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


The latest update to this website was 513pm Saturday HST


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

0.19  Kilohana, Kauai
0.31  Kaala, Oahu
0.62  Puu Alii, Molokai
0.00  Lanai
0.86  West Wailuaiki, Maui
0.61  Kawainui Stream, Big Island


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

21  Lawai, Kauai – NE 
29  Kuaokala, Oahu – NNE
31  Molokai AP, Molokai – NE
24  Lanai 1, Lanai – NE
31  Na Kula, Maui – SE
28  Kealakomo, Big Island – E


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 far northwest…thunderstorms far south 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20261151600-20261152350-GOES18-ABI-HI-GEOCOLOR-600x600.gif

 A band of showers north of the islands…which looks like it might pass us by

 

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

Showers locally 

 

https://www.weather.gov/wwamap/png/hfo.png

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 here in a wonderful vacation rental at The Sea Ranch, Sonoma County, California with my friend Bob, continuing on in my working vacation.

644am Hawaii time, Bob and I are heading over to the Sea Ranch pickleball courts now, which should be lots of fun…on this last full day here.

1002am Hawaii time, we’re back from playing pickleball, where it was a bit windy with a short period of light drizzle, although fortunately didn’t get the courts wet. I played 5-games, and was pleased with my playing, which always feels good of course. We’re back at our place now, and as I do this updating, Bob is getting a wood fire going in the fireplace. It’s almost lunch time here in California, so I’ll be soon making my daily large salad.

248pm Hawaii time, we’re back from a 2-mile hike down to the ocean, and it’s going on 6pm here in CA, so I’m going to suggest to Bob that we have a glass of red wine.

 

>>> Mauka Showers, an interesting weather web blog…Hawaii’s Wet Season, Part 3 (Final) – Overall Trends

 

>>> Highest Temperature Saturday, April 25, 2026 – 104 degrees at Rio Grande Village, TX
>>> Lowest Temperature Saturday, April 25, 2026 – minus 14 degrees at Peter Sinks, UT

 

Hawaii’s Broad Brush Weather Overview…as of Saturday evening:  Trades will continue through the next several days, gradually increasing in speed by mid-week next week, maintaining typical windward and mountain showers.

A weak upper-level disturbance approaches the islands early next week, resulting in a possible increase in moisture across windward slopes. This will be short-lived, however, and steady trades will return again for the remainder of the forecast period.

Weather Details for the Hawaiian Islands…as of Saturday evening: Isolated light showers were seen on radar over the windward areas of most islands, with the highest concentration of showers over the Kau District on Big Island. Clouds were also concentrated over windward and mountain areas, and over the Kona region of Big Island. Showers and clouds will decrease in most areas around and especially after sunset.

Upper level ridging to our northwest will continue for the next few days, and this will help keep trades winds going. Models are consistent showing a little more instability over Big Island Sunday afternoon, and the chance of showers is increased over mainly the southern half of the island. By Tuesday night, there is increasing confidence that a fast moving upper level low will move over the islands from the northwest, bringing with it cold air aloft.

Moisture will be limited, but there still should be an increase in shower coverage and strength Tuesday night and Wednesday. Guidance was unusually dry through this period, and was not used. This low moves off quickly late Wednesday into Wednesday night, and a new upper level ridge to our northwest will take over.

Therefore, trades will continue and strengthen from Wednesday through next weekend. Winds strong enough to warrant a small craft advisory are likely to develop, but it`s too far out in time for details. Apart from Tuesday night and Wednesday, expect typical trade showers mainly windward and mountains.


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: High pressure north of the state is producing moderate to fresh trade winds this afternoon. A slight decrease is expected tonight into early next week as a weak trough tracks west across the state. The trough should bring an increase of shower coverage, especially over windward waters. High pressure will rebuild far north of the state towards the middle of next week, which should bring the return of moderate to locally strong trades.

A medium-period northwest swell peaks tonight into Sunday, producing small to moderate surf for north and west-facing shores, before gradually declining through early next week. A hurricane-force low tracking across the Aleutian Islands tonight should send a moderate northwest swell towards Hawaii around the middle of next week.

Short-period northeasterly energy is beginning to decrease this afternoon, which will keep below average surf along eastern exposures for the first half of next week due to the lack of any strong trade wind activity. Locally strong trade winds could return during the latter half of next week, which could bring rough and choppy surf with near normal wave heights.

Small background energy from the west will continue to linger through today and fade out on Sunday. A small southwest bump from the Tasman Sea is expected to slowly fill in tonight and peak on Sunday. No significant south swell is expected through the first half of next week. A fetch of gales passing east of New Zealand today could produce a small south-southwest swell for next weekend.

 

A baby playing in the water at Baby Beach in Lahaina, Maui.


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

>>> Caribbean Sea: There are no active tropical cyclones

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

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

 

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

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 cyclones

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

>>> North and South Indian Oceans / Arabian Sea: There are no active tropical cyclones



Interesting:  Fires, Droughts, and Windstorms Reduce the Diversity of Amazonian Vegetation

Even after fires, severe droughts, and windstorms, the vegetation in degraded Amazonian forests demonstrates a high capacity for regeneration, including tree species. However, recovery occurs under new ecological conditions, resulting in a loss of diversity and increased vulnerability to new disturbances.

On April 20, research was published in the Proceedings of the National Academy of Sciences (PNAS), one of the world’s most cited scientific journals, showing that vulnerable species are being replaced by more resilient, generalist species. According to the authors, this indicates the formation of homogeneous forests but not a trend toward savannization, as some previous studies had suggested. This process reinforces the resilience of the biome.

However, the study, which was based on 20 years of field monitoring and was led by Brazilian researchers, highlights that the recovered areas are vulnerable to increasingly frequent extreme events in the biome, as well as to the impacts of deforestation and climate change. In addition to intensifying droughts and fires, global warming impairs ecosystem services such as water regulation and carbon sequestration.

Read More at: Fundacao de Amparo a Pesquisa do Estado de São Paulo

The research was based on 20 years of field monitoring