The National Weather Service has issued a coastal flood advisory for northern Nassau and northwestern Suffolk counties starting at 10 p.m. Monday through 2 a.m. Tuesday.
Shallow flooding is expected in vulnerable locations near waterfronts and shorelines in both counties, according to the weather service.
The overnight low Monday into Tuesday is expected to be 52 degrees.
Daytime temperatures are expected in the 60s all week, with highs close to 70 degrees on Wednesday and Thursday. Forecasters are calling for moderate overnight lows in the mid-to-upper 50s through Thursday. Light rain is expected Tuesday with rain and fog overnight into Wednesday, when light rain and patchy fog also are expected. The chance of rain is 70 percent on Thursday and 80 percent Friday before any possible showers taper off into Saturday, the weather service said.
Friday's high is expected top out at 63 degrees before the thermometer dips way down to about 41 overnight, the weather service said.
A small craft advisory is in effect until 6 p.m. Tuesday for all South Shore waters, as well. A small craft advisory is issued when sustained winds — or, frequent gusts — of 25-to-33 knots [about 28-38 mph] are expected and / or when forecasters are calling for seas of five-feet or higher.
"Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions," the advisory said.
Meanwhile, the weather service also released rainfall totals for the weekend storm that swept across Long Island.
Selden got 2.07 inches of rain in a 24-hour period from Saturday into Sunday, while Lake Ronkonkoma got 2.06, Terryville 2.00, Farmingville 1.87 and Southampton and Stony Brook 1.77. Muttontown saw the highest totals in Nassau County with 1.62 inches, followed by Woodbury with 1.61, Oyster Bay 1.44, Carle Place 1.33 and North Merrick with 1.29.