West Kaua’i

Tonight: Mostly cloudy. Breezy. Scattered showers in the evening, then showers likely after midnight. Locally heavy rainfall possible after midnight. Lows around 77 near the shore to around 66 above 3000 feet. Northeast winds 10 to 25 mph with gusts to 70 mph. Chance of rain 70 percent.

Sunday: Tropical storm conditions possible. Mostly cloudy. Showers and slight chance of thunderstorms in the morning, then numerous showers and slight chance of thunderstorms in the afternoon. Locally heavy rainfall possible. Highs 85 to 91 near the shore to around 78 above 3000 feet. Northeast winds 15 to 35 mph. Gusts up to 70 mph then 60 mph in the afternoon. Chance of rain 90 percent.

Sunday Night: Windy. Mostly cloudy with scattered showers. Locally heavy rainfall possible in the evening. Lows around 76 near the shore to around 66 above 3000 feet. East winds 10 to 30 mph with gusts to 70 mph. Chance of rain 50 percent.

South Kaua’i

Tonight: Tropical storm conditions expected. Mostly cloudy. Scattered showers in the evening, then showers after midnight. Locally heavy rainfall possible after midnight. Lows 73 to 78. Northeast winds 15 to 40 mph with gusts to 65 mph. Chance of rain 90 percent.

Sunday: Tropical storm conditions expected. Cloudy with showers and slight chance of thunderstorms. Locally heavy rainfall possible. Highs 80 to 88. East winds 15 to 45 mph with gusts to 70 mph. Chance of rain 90 percent.

Sunday Night: Tropical storm conditions possible. Cloudy with occasional showers. Locally heavy rainfall possible in the evening. Lows around 76. East winds 15 to 45 mph with gusts to 70 mph decreasing to 10 to 35 mph with gusts to 60 mph after midnight. Chance of rain 90 percent.

Kaua’i Mountains

Tonight: Tropical storm conditions expected. Mostly cloudy. Numerous showers in the evening, then showers after midnight. Locally heavy rainfall possible. Lows around 72 in the valleys to around 64 above 4000 feet. Northeast winds 10 to 60 mph with gusts to 105 mph. Chance of rain 90 percent.

Sunday: Tropical storm conditions expected. Cloudy with showers and slight chance of thunderstorms. Locally heavy rainfall possible. Highs 70 to 83. Northeast winds 15 to 65 mph with gusts to 110 mph shifting to the east 10 to 55 mph with gusts to 95 mph in the afternoon. Chance of rain 90 percent.

Sunday Night: Tropical storm conditions possible. Occasional showers. Locally heavy rainfall possible in the evening. Lows around 72 in the valleys to around 64 above 4000 feet. East winds 10 to 60 mph. Gusts up to 110 mph decreasing to 100 mph after midnight. Chance of rain near 100 percent.

North Kaua’i

Tonight: Tropical storm conditions possible. Mostly cloudy. Numerous showers in the evening, then showers after midnight. Locally heavy rainfall possible. Lows 67 to 77. Northeast winds up to 30 mph increasing to 10 to 30 mph after midnight. Gusts up to 60 mph. Chance of rain 80 percent.

Sunday: Tropical storm conditions expected. Cloudy with showers and slight chance of thunderstorms. Locally heavy rainfall possible. Highs 70 to 87. Northeast winds 10 to 40 mph with gusts to 65 mph. Chance of rain 90 percent.

Sunday Night: Windy. Mostly cloudy with occasional showers. Locally heavy rainfall possible in the evening. Lows 67 to 77. East winds up to 35 mph. Gusts up to 60 mph in the evening. Chance of rain 90 percent.

East Kaua’i

Tonight: Tropical storm conditions possible. Mostly cloudy. Numerous showers in the evening, then showers after midnight. Locally heavy rainfall possible. Lows 71 to 78. Northeast winds 10 to 30 mph with gusts to 50 mph. Chance of rain 90 percent.

Sunday: Tropical storm conditions possible. Cloudy with showers and slight chance of thunderstorms. Locally heavy rainfall possible. Highs 76 to 86. East winds 10 to 30 mph with gusts to 60 mph. Chance of rain 90 percent.

Sunday Night: Breezy. Occasional showers. Locally heavy rainfall possible in the evening. Lows 71 to 78. East winds 10 to 25 mph with gusts to 50 mph. Chance of rain near 100 percent.

Detailed Forecast

Synopsis

Hurricane Lala has moved past the southern tip of the Big Island late this afternoon and will continue moving west-northwest (to the south of the other islands) through Sunday evening. High winds, potentially flooding rains, and high surf impacts will be felt statewide. A Hurricane Warning is in effect for Big Island and a Tropical Storm Warning is in effect for the rest of the state. Wet trade wind weather will begin Monday and extend through next week.

Discussion

The main forecast concern through late Sunday will be impacts from Tropical Storm Lala. As of 5 PM HST, Hurricane Lala was located about 30 miles southwest of South Point moving northwest around 9 mph. The center of the eye did not cross over land, so there is no official “landfall” for this hurricane.
The center of rotation can be seen by radar as it drifts off the southwest coast of the Big Island. Based on the latest forecast from the National Hurricane Center, Lala is expected to move west-northwest, with the center of circulation remaining south of the smaller islands. Remember impacts can occur well outside the center of the storm. Please stay up to date on the latest forecasts, and prepare for the impacts described below.
STRONG AND GUSTY WINDS…Damaging tropical storm force winds (39 mph to 73 mph) continue across the Big Island and Maui County, Oahu, and should begin in Kauai tonight. A Hurricane Warning remains in effect for the Big Island and surrounding waters. A Tropical Storm Warning is in effect for the rest of the state and surrounding waters. Localized areas damaging winds have been observed over and downwind of the mountainous terrain, even well away from the tropical cyclone center. These localized strong winds and gusts will also be felt in advance of the arrival of Lala and should be kept in mind as last minute preparations are being made. Winds over 100 mph have been observed on the summits of the Big Island and Maui, and travel is strongly discouraged.
HEAVY RAINFALL…Heavy rainfall is ongoing on the Big Island and Maui County, and will spread to Oahu and Kauai this evening and last into Sunday. Orographic enhancement will result in locally higher rainfall totals where moist tropical flow interacts with island terrain. Flash flooding and rapidly rising streams have been observed and will will remain possible. The location of heaviest rain so far has been over windward portions of the Big Island and Maui. The latest forecast for windward portion of the Big Island has an additional 6 to 10 inches of rain, with locally higher amounts. Rainfall totals of 8 to 12 inches are possible on windward Maui and up 8 inches of rainfall could occur across the remainder of the island chain, again with localized higher amounts. While the highest rainfall amounts will be focused over windward areas, leeward areas will also have a significant flood risk. Heavy rain could persist into Monday for some areas. A Flood Watch remains in effect for all islands.
LARGE AND ROUGH SURF…Lala has generated a large easterly swell that is bringing large surf to exposed east and southeast facing shores. A High Surf Warning remains in effect for east facing shores of Big Island, Maui, Molokai and Oahu, and a High Surf Advisory is posted for east facing shores of Kauai. Very large and extremely rough seas will produce damaging surf, significant beach erosion, and overwash across vulnerable coastal infrastructure, mainly on the Big Island of Hawaii. Highest storm surge up to 3 feet is forecast for the eastern side of the Big Island.
In anticipation of critical new updates with each of the advisory packages issued by the National Hurricane Center (NHC), the NWS Honolulu will continue delaying the issuance of our typical forecast package products (AFD, SFT, PFM, ZFP, SPF, CWF, etc.) until after the release of NHC's suite of products, to incorporate the latest and most up-to-date information on Tropical Storm Lala.
Humid trade winds will take over Monday and last through the next week in the wake of Lala's departure.

Aviation

The center of Hurricane Lala is approximately 35 nm S of Hilo and is moving west northwest at around 7 knots. Island-wide TAF sites will experience strong northeast winds gusting to tropical storm force peaking through through 12Z southern Islands and 10Z-17Z northwestern islands. For PHKO low confidence in wind shift timing. IFR to MVFR cigs/vsbys will be common in heavier showers and nearest Lala.
A Big Island Maui and Lanai AIRMET for surface winds greater than 30 knots is currently in effect.
A Big Island Maui Molokai and Lanai AIRMET for IFR conditions is currently in effect.
AIRMET SIERRA is currently in effect for north through east areas of Oahu for mountain obscuration above 2500 feet.
AIRMET TANGO for moderate to isolated severe turbulence remains in effect immediately south and west of mountains due to low level winds. TANGO likely continue into Sunday.

Marine

Hurricane Lala will pass over or just south of the Big Island with hurricane conditions expected around the Big Island for which a Hurricane Warning is in effect through tonight. Tropical Storm Warnings remain in effect for Maui County and surrounding waters through this time and are in effect from 6 PM this evening until 6 PM Sunday for the nearshore waters of Kauai and Oahu. Trades return on Monday.
High Surf Warnings remain in effect for all E facing shores except Kauai where an advisory remains in effect. Surf rapidly declines tonight for the eastern end of the state but will take through Sunday to fall below the advisory threshold for the smaller islands. The High Surf Advisory for Kauai may require an extension into Sunday.
Choppy conditions for N shores as short period swell wraps from the east through the weekend. For S shores, surf remains below the advisory threshold but will receive a small boost as short period swell associated with Lala works through the area. Long period energy from a distant Southern Ocean swell maintains S shore surf Sunday into Monday.

Fire weather

Issued at 510 PM HST Sat Aug 15 2026
Increasing humidity and rainfall with Lala will remove fire weather concerns through the next week. The temperature inversion will not be present tonight.

HFO Watches/Warnings/Advisories

Tropical Storm Warning for Central Oahu, East Honolulu, Ewa Plain, Haleakala Summit, Honolulu Metro, Kahoolawe, Kauai East, Kauai Mountains, Kauai North, Kauai South, Kauai Southwest, Kipahulu, Koolau Leeward, Koolau Windward, Lanai Leeward, Lanai Mauka, Lanai South, Lanai Windward, Maui Central Valley North, Maui Central Valley South, Maui Leeward West, Maui Windward West, Molokai Leeward South, Molokai North, Molokai Southeast, Molokai West, Molokai Windward, Niihau, Oahu North Shore, Olomana, South Haleakala, South Maui/Upcountry, Waianae Coast, Waianae Mountains, Windward Haleakala.
Flood Watch through late Sunday night for Central Oahu, East Honolulu, Ewa Plain, Honolulu Metro, Kauai East, Kauai Mountains, Kauai North, Kauai South, Kauai Southwest, Koolau Leeward, Koolau Windward, Niihau, Oahu North Shore, Olomana, Waianae Coast, Waianae Mountains.
High Surf Warning until 6 AM HST Sunday for Big Island East, Big Island North, Big Island Southeast, Kipahulu, Koolau Windward, Maui Windward West, Molokai Southeast, Molokai Windward, Olomana, South Haleakala, Windward Haleakala.
Flood Watch through late tonight for Big Island East, Big Island Interior, Big Island North, Big Island South, Big Island Southeast, Big Island Summits, Haleakala Summit, Kahoolawe, Kipahulu, Kohala, Kona, Lanai Leeward, Lanai Mauka, Lanai South, Lanai Windward, Maui Central Valley North, Maui Central Valley South, Maui Leeward West, Maui Windward West, Molokai Leeward South, Molokai North, Molokai Southeast, Molokai West, Molokai Windward, South Haleakala, South Maui/Upcountry, Windward Haleakala.
Hurricane Warning for Big Island East, Big Island Interior, Big Island North, Big Island South, Big Island Southeast, Big Island Summits, Kohala, Kona.
High Surf Advisory until 6 AM HST Sunday for Kauai East, Kauai South.
Tropical Storm Warning for Kaiwi Channel, Kauai Channel, Kauai Leeward Waters, Kauai Northwest Waters, Kauai Windward Waters, Maalaea Bay, Maui County Leeward Waters, Maui County Windward Waters, Oahu Leeward Waters, Oahu Windward Waters, Pailolo Channel.
Hurricane Warning for Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters, Big Island Windward Waters.
Small Craft Advisory until 6 PM HST this evening for Kauai Channel, Kauai Leeward Waters, Kauai Northwest Waters, Kauai Windward Waters, Oahu Leeward Waters, Oahu Windward Waters.

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Data Courtesy of NOAA.gov