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Islip Information

Islip, New York
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Sunrise
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UV Index Today
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Tonight
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Mostly sunny skies are on the way for today, making for another very nice late-August day. High temperatures will reach the upper 70s to lower 80s. The UV index will be on the high side, so don't forget the sunscreen if you're spending time outdoors. If you're headed to the South Shore beaches, there is a risk for some rip currents. Always swim in a lifeguarded area and follow the advice of beach patrols.
Long Island Today forecast
For tonight, clouds will gradually increase, but it will remain dry and mild for most of the overnight. Low temperatures will only fall into the mid- to upper 60s as we head toward Thursday morning. You'll also start to notice a little more humidity creeping back into the area.
Long Island tonight forecast
Thursday starts with some sunshine before clouds increase during the afternoon. There will be a chance for a spotty shower or thunderstorm later in the day, although the overall trend continues to favor more dry weather than wet weather. Still, keep an eye on the sky late Thursday, as a couple of showers or storms could pop up. It will feel a bit more humid, with highs in the upper 70s to lower 80s. A few showers and perhaps a thunderstorm remain possible Thursday night, with lows in the upper 60s.
Heading into Friday, expect a mix of sun and clouds with a chance for a spotty shower or thunderstorm and highs around 80 degrees. The good news is the weekend continues to look very nice. Saturday and Sunday should feature mostly sunny skies with just a few passing clouds. High temperatures both days will be in the upper 70s to lower 80s — great weather for any outdoor plans as we wrap up the final weekend of August. Meteorological Fall starts Tuesday September 1st. I do see a change with an increasing threat of wet weather for the middle of next week.
Long Island 10 day forecast

Beach and Boating Forecast

Long Island Rip Currents

FUTURECAST

Watching the next round of showers developing towards Thursday evening.
TROPICAL WEATHER Check out our new Tropical Weather page
The next named Tropical system will be Dolly. Possible tropical system within the next 7 days off the coast of Africa.