
THINGS TO DO · YOUTUBE SHORT
Heckscher State Park, East Islip, NY, US - Part 1
A local activity video shared by OurTrip Videos.
Watch on YouTube ↗
Weather · August
Average highs of 81°F, lows of 66°F and 4.2 in of rain, from 30 years of weather records.
August is Islip’s 2nd warmest month, with average highs of 81°F and lows of 66°F. That is 1° cooler than July, and 20° above the yearly average high.
High and low Rain



A look around town before you go.

THINGS TO DO · YOUTUBE SHORT
A local activity video shared by OurTrip Videos.
Watch on YouTube ↗
THINGS TO DO · YOUTUBE SHORT
A local activity video shared by CBS New York.
Watch on YouTube ↗Planning a trip? See the best time to visit Islip and today’s forecast.
Average highs are 81°F and average lows 66°F, for a daily mean of 74°F. Individual days run hotter or colder than these 30-year averages.
August averages 4.2 in of precipitation over about 9 days with at least 0.01 in. It is the 3rd wettest month of the year.
Around mid-August the sun rises about 6:02 AM and sets about 7:52 PM, for roughly 13.8 hours of daylight.
The mildest months for visiting are May, July, September. August is warm.
NOAA U.S. Climate Normals 1991–2020, Islip Li Macarthur Ap station (9.7 mi from downtown). Sunrise and sunset are calculated for August 15 at the city’s coordinates.