Glenn James
Hawaii Weather Today
Founder and maintainer for 30 years 

 

The latest update to this website was at 546pm Tuesday (HST)

 

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

1.70  Mount Waialeale , Kauai
0.25  Manoa Lyon Aboretum, Oahu
0.73  Puu Alii, Molokai
0.00  Lanai
0.48  Puu Kukui, Maui
0.84  Kealakekua, Big Island

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

31  Port Allen, Kauai – ENE
38  Kuaokala, Oahu – NE
27  Makapulapai, Molokai – NE
39  Lanai 1,  Lanai – NE
38  Kealaloloa Rg, Maui – NE
35  Kealakomo, Big Island – NE

Hawaii’s Mountains – Here’s a link to the live webcams on the summit of our tallest mountain Mauna Kea (~13,800 feet high) on the Big Island of Hawaii, and atop the Haleakala Crater (~10,023 feet) 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

The high clouds have finally cleared the state…a cold front northwest

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20260901840-20260910300-GOES18-ABI-HI-GEOCOLOR-600x600.gif

Low clouds arriving along the windward sides / higher level clouds moving away from the state to the southeast and east

 

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 

 

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

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Tuesday comments:  I’m here in Corte Madera, Marin County, California on a working vacation.

523am Hawaii time, I’m here at my friend Linda’s house. It’s cloudy, cool and breezy with a few light sprinkles, with a 57 degree low. BTW, when I say Hawaii time, it is 3-hours later here in California.

1217pm, it’s cloudy, chilly, and wet here in Marin County.

255pm Hawaii time, off and on showers, the temperature is a cool 61 degrees here in Corte Madera, CA

545pm Hawaii time, it’s mostly cloudy here in Marin County, and the earlier showers have ended, while the temperature has dropped to 58 degrees. I know that the very near full moon is shining brightly above the clouds, although I can’t see it.

 

>>> Highest Temperature Tuesday, March 31, 2026 – 100 degrees at Rio Grande Village, TX
>>> Lowest Temperature Tuesday, March 31, 2026 – 7 degrees at Saint Mary, MT

 

Hawaii’s Broad Brush Weather Overview…as of 355pm Tuesday: Moderate to locally breezy trades will taper off Wednesday and Thursday, becoming light and variable by the weekend. Shower activity will be kept to a minimum with just a few windward and mountain clouds and showers through the end of the week.

Weather Details for the Hawaiian Islands…as of 355pm Tuesday: A stationary upper low persists northeast of the state. At the surface, a 1028 millibar surface high is centered far north of Hawaii, which is driving fresh to locally strong trade winds across the area.

Moisture levels are below average, so while some instability from the upper low and orographic lifting will bring a few windward showers tonight, rainfall amounts will be limited by the moisture levels. Expect another cool night lows in the low to mid 60’s…cooler in the upcountry areas.

Looking ahead, trades will begin to ease Wednesday into Thursday, as the surface high weakens and shifts eastward, with a surface trough developing east of Hawaii. This feature will weaken the trade wind flow to moderate over the islands through the rest of the week.

Rainfall will be limited to occasional small batches of moisture moving in from the east by the trades. A front will approach from the west during the first half of next week. Winds will weaken, shift southeasterly, then south, while a pre-frontal convergence band drags tropical moisture up over the islands. Still significant model differences in the long-range models for the possible setup, but something to watch out for mid to late next week.

 

Here’s a near real-time Wind Profile of the Pacific Ocean – Zoom Earth – along with a Closer View of the islands / Vog map animation / 8-Day Precipitation model


https://www.weather.gov/images/hfo/graphics/npac.gif 

 

Hawaii’s Marine Environment…as of 355pm Tuesday: A 1030 millibar high pressure north of Hawaii will elongate and shift eastward through the week, causing trade winds to gradually diminish. The Small Craft Advisory for fresh to locally strong trade winds remains in effect across all Hawaiian waters through Wednesday morning. By that point, a weakening pressure gradient means that strong trade winds are expected to be limited to favored channels only. Winds become moderate to fresh northeasterly for the majority of the waters by this weekend.

Moderate north and east-facing shore surf continues to be generated by a short period north-northeast (020 degree) swell which will gradually diminish tonight and Wednesday as it veers northeast. Shores better exposed to this NNE swell will experience decent wind wave chop generated by solid moderate trades.

Surf along west-facing shores will remain dominated by wrap around from the north-northeasterly swell and will gradually diminish in kind through the week. The next small, medium-period northwest and west-northwest swells arrive this weekend to bring a small bump in surf for west-facing shores. Along south-facing shores, expect continued impulses to sustain small surf through the week.

 



World-wide Tropical Cyclone Activity

 

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

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

 

Northeastern Pacific:  There are no active tropical cyclones

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

North 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 Indian Ocean:  There are no active tropical cyclones

South Indian Ocean:  There are no active tropical cyclones

Arabian Sea:  There are no active tropical cyclones

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

 

>>> Here’s a link to the Pacific Disaster Center’s (PDC Global) Weather Wall website

 

Interesting:  New Study Highlights Success in Open-Coast Seagrass Restoration

New research led by scientists at UC San Diego’s Scripps Institution of Oceanography is shining a spotlight on one of the ocean’s most overlooked habitats: seagrass.

Led by Scripps Oceanography PhD candidate Rilee Sanders and supported by The Bay Foundation, Paua Marine Research Group, USC Wrigley Institute for Environment and Sustainability and Pacific Marine and Estuarine Fish Habitat Partnership, the study documented the first successful restoration of open-coast seagrass (common eelgrass). The findings offer promising insight into the feasibility of restoring high-value coastal habitats in the future.

Seagrasses act as ecosystem engineers, creating complex underwater habitats that support life along the coast. Around the world, these habitats are increasingly threatened by climate change and human impacts like coastal development, invasive species and overfishing.

Read more at: University of California San Diego

Juvenile señorita (Oxyjulis californica) utilize the protective canopy of the open-coast seagrass restoration site at Button Shell, Catalina Island.