Dangerously Excessive Heat and Humidity Continues from the Midwest and Eastward

Oppressive heat and humidity will continue through Saturday from the Midwest to the East Coast. The Midwest will get a slight reprieve on Sunday as a cold front moves through the area, while excessive heat continues in the East. In addition, strong to severe storms will bring potential for damaging winds, hail, and heavy rain on Saturday. Read More >

Hazardous Weather Conditions

En Español

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

32°C

90°F

Humidity	62%
Wind Speed	NW 13 km/h
Barometer	1010.6 mb (29.85 in)
Dewpoint	24°C (75°F)
Visibility	16 km
Heat Index	38°C (101°F)
Last update	20 Jul 9:56 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Mobile Weather Hourly Weather Forecast

Extended Forecast for

West Sayville NY

Excessive Heat Warning until July 21, 08:00pm

Click here for hazard details and duration

Excessive Heat Warning

Excessive Heat Warning until July 21, 08:00pm

NOW until
8:00pm Sun

Excessive Heat Warning
Today

Mostly Sunny
then Slight
Chance
T-storms
High: 34 °C
Tonight

Slight Chance
T-storms then
Partly Cloudy
Low: 26 °C
Sunday

Mostly Sunny
then Chance
T-storms
High: 34 °C
Sunday
Night

Chance
T-storms
Low: 24 °C
Monday

T-storms
Likely
High: 29 °C
Monday
Night

T-storms
Likely
Low: 23 °C
Tuesday

Chance
T-storms then
Mostly Cloudy
High: 27 °C
Tuesday
Night

Mostly Cloudy
Low: 20 °C

Detailed Forecast

Today

A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 34. Heat index values as high as 41. Southwest wind 11 to 21 km/h.

Tonight

A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 26. West wind 11 to 16 km/h.

Sunday

A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 34. Heat index values as high as 41. West wind 11 to 18 km/h.

Sunday Night

A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 24. West wind 5 to 13 km/h becoming northwest after midnight.

Monday

Showers and thunderstorms likely, mainly after 9am. Mostly cloudy, with a high near 29. North wind 5 to 11 km/h becoming southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.

Monday Night

Showers and thunderstorms likely. Mostly cloudy, with a low around 23. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 cm possible.

Tuesday

A 40 percent chance of showers and thunderstorms before noon. Mostly cloudy, with a high near 27.

Tuesday Night

Mostly cloudy, with a low around 20.

Wednesday

Mostly sunny, with a high near 27.

Wednesday Night

Partly cloudy, with a low around 21.

Thursday

Mostly sunny, with a high near 28.

Thursday Night

Mostly cloudy, with a low around 21.