Updated 1:55 p.m.
The threat of heavy rainfall will diminish after Monday as a front that stalled across Molokai weakens, the National Weather Service said. A high surf warning also has been posted for Maui and Molokai.
Residual moisture will fuel windward and mauka showers, especially across Maui County and the Big Island, as trade winds build back up by the middle of the week.
A flash flood watch continues for Maui, Molokai, Lanai, Kahoolawe and Oahu until 6 p.m. Monday.
As the front weakens, it will produce heavy showers with a slight chance of thunderstorms in Maui County, bringing a potential for flash flooding through the late afternoon.
The National Weather Service urges people to avoid going near steams and to be aware of potential flooding in low lying areas.
A high surf warning for north and west facing shores of Molokai and north facing shores of Maui has been posted until 6 a.m. Tuesday.
A large swell is building in the waters across the Hawaiian Islands, producing giant surf in the range of 25 to 35 feet.
The surf has been rising in the morning Monday and peaking in the afternoon.
Beach goers and swimmers are warned of significant shorebreak and rip currents.