Weather for East Islip, NY - East Islip, NY Weather, Current Weather in East Islip, NY. Local weather report for East Islip, NY, Local East Islip, NY weather. Forecast for East Islip, New York, East Islip, NY weather forecast. Find your local East Islip weather forecast. East Islip, NY weather conditions. Weather outlook for East Islip, NY. Weather report for East Islip, NY. Weather Maps and Driving Directions Maps. East Islip Weather - Weather East Islip.