The latest update to this website was at 826pm Monday (HST)

 

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

3.42  Waiakoali, Kauai
2.30  Kaala, Oahu
0.29  Molokai 1, Molokai
0.04  Lanai City, Lanai
0.38  Hanaula, Maui
0.73  Keahuolu, Big Island

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

24  Barking Sands, Kauai – SW 
30  Kuaokala, Oahu – SSE
21  Molokai AP, Molokai – SSE
12  Lanai 1, Lanai – S  
30  Kahului AP, Maui – S 
24  Hilo AP, Big Island – SE

 

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

 

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The retiring cold front is near Kauai and Oahu…the next cold front is coming into view to the northwest

 

https://www.weather.gov/images/hfo/satellite/Hawaii_IR_loop.gif

Variably cloudy skies 

 

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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

 

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

 

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Monday comments:  I’m here at home through the winter in upper Kula, Maui

It’s clear with some clouds around the edges here in Maui County early this morning, with a low temperature of 53.5 degrees at my place, with the relative humidity 65 percent.

Some high clouds have moved over Maui County this morning, otherwise there aren’t that many lower level cumulus clouds around at the time of this writing.

115pm, I played Pickleball this morning, and as I was driving back up here to Kula, it got more and more cloudy, although most of it is the icy high cirrus variety. Looking down into the central valley it’s way voggy!

6pm, cloudy and foggy at times here in upper Kula, although it looks like rain could fall…it hasn’t yet. It’s 63 degrees here at my place…with 73% relative humidity.

826pm, the high clouds remain over the state, at least in most areas. Here in upper Kula the temperature is 60 degrees, with the relative humidity 71%…with no rain. Most of the rain, at least at the time of this writing was over Kauai and Molokai.

Weather Wit of the day: TV Weathercaster – A person who looks too much at the camera instead of out the window

>>> Highest Temperature Monday, December 15, 2025 – 89 at Palm Springs, CA
>>> Lowest Temperature Monday, December 15, 2025 – minus 15 at Mount Washington, NH

 

Hawaii’s Broad Brush Weather Overview: A surface trough is oriented NE-SW across Kauai County, with thunderstorms forming and moving toward Niihau and Kauai. This trough will move west tonight and remain to the west Tuesday. A new cold front will approach from the northwest Tue night into Wed, adding its moisture and convergence to the remains of the initial trough and moving back southeast toward Kauai County.

The main area of concern for potential heavy rain for mid to late-week is therefore Kauai and Niihau. There is a chance that this feature could get near Oahu. After trending away from Oahu the past couple of days, the very latest guidance is moving back toward a higher chance of it reaching the island.

Hawaii’s Weather Details: Showers and thunderstorms were located in the Kauai Channel and over and near Kauai and Niihau. These were moving northeast, and have a good chance to impact the islands through the remainder of the afternoon and possibly in the early evening. Satellite images show lots of high clouds streaming northeast across the entire state, and this is expected to continue into tonight.

Models still show the surface trough near Kauai/Niihau (the remains of an old cold front) moving north and west away from the state tonight and remaining there Tuesday. A new cold front will move in from the northwest Tuesday night, pushing an enhanced area of moisture and convergence toward Kauai County.

The latest models now indicate that it could make it to Oahu, or at least close enough to increase rain chances there. Moderate to heavy rain in Kauai County is likely Wed-Thu, and is now looking more possible over/near Oahu during the same time frame.

The area of moisture resulting from this next front appears to get hung up along an east-west axis near or just north of the state by Saturday. A surface high pressure system to our northeast is then forecast to send northeast to east trades into the state this coming weekend, and this will keep the area of moisture lingering over the state right into early next week.

There is lots of uncertainty concerning how much rain there will be this coming weekend, but there appears to be a relatively high chance of clouds and a moderate chance at continued showery conditions.

Fire weather:  Due to enhanced rainfall over the western two-thirds of the state, conditions will remain below critical fire weather thresholds. A trough settling in between Kauai and Oahu will maintain unsettled weather under light to moderate southerlies, while more stable, drier (south)easterly winds continue over Maui and Big Island. Temperature inversion heights will range between 7,000 to 9,000 feet.

Here’s a near real-time Wind Profile of the Pacific Ocean – 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: A surface trough continues to lift northwestward through Kauai Coastal Waters. Expect periods of showers, locally heavy at times with isolated thunderstorms possible along the trough axis. Elsewhere, expect decreasing shower activity in a gentle southeasterly to southerly wind pattern. Another cold front will approach Kauai from the northwest on Wednesday and Thursday, possibly increasing shower activity and thunderstorms for the northwest waters. A Small Craft Advisory remains in effect for most coastal waters around Kauai and Oahu due to high seas from the passing north-northwest swell.

The current large medium period north-northwest (320-340 degree) swell will peak and then slowly decline into Tuesday. Surf heights will fall just below HSA levels by tonight for Kauai and Oahu. The HSA was extended in time for north and west facing shores of Molokai and north facing shores of Maui. Predicted surf heights for west facing shores of the Big Island are lower then previously forecast, and will only reach HSA levels, therefore the High Surf Warning was lowered to an advisory starting later tonight. The HSA will likely expire for all islands by early Tuesday morning.

A combination of moderate northwest and north swells will keep surf elevated through the week, possibly reaching HSA levels along north and west facing shores from Wednesday into Thursday.

East facing shores remain tiny to small given the lack of trade winds, but shorelines exposed to north swell energy may remain slightly elevated through the week. Surf along south facing shores increases due to short period southerly wind wave chop.

 

The Best Beaches in South Maui: Our Family's Favorite Spots — Adventurous Family with Kids|



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

 

Northeastern Pacific:  There are no active tropical cyclones

North Central Pacific: There are no active tropical cyclones

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

 

Northwest Pacific Ocean:  There are no active tropical cyclones

Southwest Pacific Ocean:  

Tropical Cyclone 08P…is located approximately 254 NM east-northeast of Port Vila, Vanuatu

https://www.metoc.navy.mil/jtwc/products/sh0826.gif

North and South Indian Ocean:   

South Indian Ocean:

Tropical Cyclone 07S (Bakung)…is located approximately 259 NM west-northwest of the Cocos Islands

https://www.metoc.navy.mil/jtwc/products/sh0726.gif

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: Pandemic ‘Beneath the Surface’ Has Been Quietly Wiping Out Sea Urchins Around the World

Researchers have shown that a 2022-2023 mass mortality event has driven previously abundant populations of Diadema africanum sea urchins throughout the Canary Islands to near-extinction. This outbreak was more impactful than previous ones in 2008 and 2018 in the same islands, because this time the production of larvae and the recruitment of juveniles has nearly ceased. The pathogens that caused the disease aren’t yet definitely known, but similar die-offs of sea urchins have been reported nearly simultaneously from the Caribbean to the western Indian Ocean.

Sea urchins are ecosystem engineers, the marine equivalent of mega-herbivores on land. By grazing and shredding seaweed and seagrass, they control algal growth and promote the survival of slow-growing organisms like corals and some calcifying algae. They are likewise prey for a plethora of marine mammals, fish, crustaceans, and sea stars. However, when they become overabundant, for example when these predators are overhunted or overfished, sea urchins can also inflict substantial damage to marine habits and form so-called ‘urchin barrens’.”

Now, a study in Frontiers in Marine Science has revealed that over the last four years, an unrecognized pandemic that has been wiping out sea urchins around the world has hit the Canary Islands. The consequences on marine ecosystems aren’t yet fully known, but likely profound.

Read More: Frontiers

Image: Images of moribund D. africanum off Tenerife Island during the September 2022 mass mortality event: a) Moribund individual of D. africanum showing abnormal position and movement of the spines with white and greenish bare areas devoid of tissue; b) Accumulation of detached spines and dead D. africanum individuals on the sea bed; c) The fish Thalassoma pavo predating upon a moribund individual of D. africanum; and d) The polychaete Hermodice carunculata feeding on a dead individual of D. africanum.