National Weather Service Forecast for: Wailuku HI
Issued by: National Weather Service Honolulu, HI
Updated: 7:09 am HST Mar 19, 2026
 
Today

Today: Scattered showers. Partly sunny, with a high near 80. North northeast wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Scattered
Showers
 Tonight

Tonight: Scattered showers, then showers and possibly a thunderstorm after 8pm. Some of the storms could produce heavy rainfall. Low around 70. Light and variable wind. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Heavy Rain
 Friday

Friday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 80. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Heavy Rain
 Friday
Night
Friday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 70. South wind around 9 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Heavy Rain
 Saturday

Saturday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 79. South southwest wind 9 to 11 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Heavy Rain
 Saturday
Night
Saturday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 68. South southeast wind around 11 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Heavy Rain
 Sunday

Sunday: Showers and possibly a thunderstorm. High near 78. South wind 6 to 11 mph becoming light and variable in the afternoon. Chance of precipitation is 90%.
Showers
 Sunday
Night
Sunday Night: Showers likely. Cloudy, with a low around 66. Calm wind becoming north northeast 5 to 9 mph after midnight. Chance of precipitation is 70%.
Showers
Likely
 Monday

Monday: Showers likely, mainly before 8am. Cloudy, with a high near 76. Northeast wind 9 to 13 mph. Chance of precipitation is 70%.
Showers
Likely
Hi 80 °F Lo 70 °F Hi 80 °F Lo 70 °F Hi 79 °F Lo 68 °F Hi 78 °F Lo 66 °F Hi 76 °F

Flood Watch
 

Today
 
 Scattered showers. Partly sunny, with a high near 80. North northeast wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
 
 Scattered showers, then showers and possibly a thunderstorm after 8pm. Some of the storms could produce heavy rainfall. Low around 70. Light and variable wind. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday
 
 Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 80. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
 
 Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 70. South wind around 9 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Saturday
 
 Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 79. South southwest wind 9 to 11 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Saturday Night
 
 Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 68. South southeast wind around 11 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Sunday
 
 Showers and possibly a thunderstorm. High near 78. South wind 6 to 11 mph becoming light and variable in the afternoon. Chance of precipitation is 90%.
Sunday Night
 
 Showers likely. Cloudy, with a low around 66. Calm wind becoming north northeast 5 to 9 mph after midnight. Chance of precipitation is 70%.
Monday
 
 Showers likely, mainly before 8am. Cloudy, with a high near 76. Northeast wind 9 to 13 mph. Chance of precipitation is 70%.
Monday Night
 
 Scattered showers, mainly before 2am. Mostly cloudy, with a low around 65. East northeast wind 11 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Tuesday
 
 Scattered showers. Mostly cloudy, with a high near 75. Breezy, with a northeast wind 14 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Tuesday Night
 
 Scattered showers. Mostly cloudy, with a low around 65. Breezy, with an east northeast wind 11 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Wednesday
 
 Scattered showers. Mostly cloudy, with a high near 77. Northeast wind 11 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Wailuku HI.