Mount Sinai, NY Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Fri
Jul 17
Partly Cloudy
Close Hourly
-º / 70º 7% SSW 7 mph 76%
9pm Partly Cloudy 75º 1% SSW 5 mph 62%
10pm Partly Cloudy 73º 1% SSW 5 mph 68%
11pm Partly Cloudy 72º 1% SSW 5 mph 71%
Sat
Jul 18
PM Thunderstorms
View Hourly
80º / 71º 72% SSW 17 mph 82%
12am Partly Cloudy 72º 2% SSW 6 mph 74%
1am Partly Cloudy 72º 2% SSW 6 mph 76%
2am Partly Cloudy 72º 2% SSW 6 mph 81%
3am Partly Cloudy 71º 3% SSW 6 mph 85%
4am Partly Cloudy 71º 7% SSW 6 mph 89%
5am Partly Cloudy 71º 7% SSW 6 mph 92%
6am Partly Cloudy 71º 7% SSW 7 mph 92%
7am Partly Cloudy 73º 5% SSW 8 mph 86%
8am Mostly Cloudy 76º 7% SSW 10 mph 77%
9am Partly Cloudy 78º 6% SSW 12 mph 71%
10am Mostly Cloudy 79º 10% SSW 13 mph 68%
11am Cloudy 80º 20% SSW 15 mph 68%
12pm Scattered Thunderstorms 78º 57% SSW 17 mph 75%
1pm Thunderstorms 76º 72% SSW 16 mph 81%
2pm Thunderstorms 75º 68% SSW 15 mph 87%
3pm Thunderstorms 75º 61% SSW 13 mph 92%
4pm Scattered Thunderstorms 75º 55% SSW 15 mph 93%
5pm Cloudy 75º 24% SSW 15 mph 90%
6pm Scattered Thunderstorms 76º 56% SSW 15 mph 90%
7pm Scattered Thunderstorms 76º 52% SSW 14 mph 89%
8pm Thunderstorms 75º 61% SSW 13 mph 93%
9pm Thunderstorms 74º 68% SW 13 mph 95%
10pm Scattered Thunderstorms 74º 53% SW 13 mph 97%
11pm Thunderstorms 74º 62% SW 13 mph 96%
Sun
Jul 19
Partly Cloudy
View Hourly
80º / 62º 5% NW 14 mph 56%
12am Cloudy 74º 24% WSW 11 mph 96%
1am Cloudy 74º 16% WSW 12 mph 95%
2am Mostly Cloudy 74º 23% W 12 mph 94%
3am Cloudy 73º 7% W 12 mph 92%
4am Mostly Cloudy 73º 20% W 12 mph 90%
5am Mostly Cloudy 73º 7% W 11 mph 87%
6am Mostly Cloudy 72º 6% WNW 11 mph 87%
7am Partly Cloudy 73º 5% NW 11 mph 84%
8am Partly Cloudy 73º 2% NW 13 mph 76%
9am Sunny 74º 1% NW 13 mph 67%
10am Sunny 75º 1% NW 14 mph 60%
11am Sunny 76º 0% NW 14 mph 55%
12pm Sunny 78º 0% NW 14 mph 51%
1pm Sunny 79º 0% NW 14 mph 49%
2pm Sunny 79º 0% NW 14 mph 47%
3pm Sunny 80º 0% NW 13 mph 44%
4pm Sunny 80º 0% NW 13 mph 45%
5pm Sunny 79º 0% NW 11 mph 44%
6pm Sunny 79º 0% NW 10 mph 44%
7pm Sunny 77º 0% NNW 9 mph 47%
8pm Sunny 76º 0% NNW 8 mph 51%
Mon
Jul 20
Sunny 80º / 69º 1% WNW 8 mph 52%
Tue
Jul 21
Scattered Thunderstorms 78º / 71º 58% S 15 mph 76%
Wed
Jul 22
Scattered Thunderstorms 82º / 65º 69% WSW 14 mph 73%
Thu
Jul 23
Partly Cloudy 80º / 66º 19% WNW 10 mph 59%
Fri
Jul 24
Mostly Sunny 81º / 67º 21% NW 9 mph 59%

Weather Radar for Mount Sinai, NY See Radar

* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Mount Sinai, NY

Tonight
Low : 70ºF
SSW wind around 6 kt. Widespread smoke, mainly between 11pm and 2am. Seas 1 ft or less.
Saturday
High : 81ºF
SSW wind 8 to 13 kt, with gusts as high as 21 kt. Showers likely, then showers and possibly a thunderstorm after 2pm. Widespread smoke, mainly before 2pm. Seas 1 ft or less.
Saturday Night
Low : 71ºF
SSW wind 13 to 15 kt becoming WSW after midnight. Winds could gust as high as 21 kt. Showers and possibly a thunderstorm, mainly before 2am. Patchy smoke before 8pm. Seas around 1 ft.
Sunday
High : 81ºF
NW wind 10 to 13 kt. Partly sunny, then gradually becoming sunny. Seas around 1 ft.
Sunday Night
Low : 66ºF
N wind 6 to 8 kt. Mostly clear. Seas around 1 ft.
Monday
High : 80ºF
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.
Monday Night
Low : 69ºF
S wind 6 to 9 kt. Partly cloudy. Seas 1 ft or less.
Tuesday
High : 81ºF
S wind 8 to 13 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Tuesday Night
Low : 71ºF
SSW wind 13 to 16 kt. A chance of showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then showers after 2am. Seas 1 ft or less.

NOAA Buoy Data Near Mount Sinai, NY See Map

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    Wind Speed Forecast for Mount Sinai, NY

    SaturdaySunday
    Wind Speed (MPH) 566121615131211131411
    1am5am9am1pm5pm9pm1am5am9am1pm5pm9pm
    MPH 566121615131211131411
    DIR SSWSSWSSWSSWSSWSSWSWWSWWNWNWNW

    Current Weather Conditions In Mount Sinai, NY

    As Of: 21 minutes ago

    • 75ºF
    • 75ºF
    • 5mph
    • 0º (SSW)
    • 5mph
    • Partly Cloudy
    • 5mi
    • 30.02"
    • 62%
    • 0ºF

    The weather right now in Mount Sinai, NY is Partly Cloudy. The current temperature is 75°F, and the expected high and low for today, Friday, July 17, 2026, are -° high temperature and 70°F low temperature. The wind is currently blowing at 5 miles per hour, and coming from the South Southwest. The wind is gusting to 5 mph. With the wind and the atmosphere the temperature feels like 75° Fahrenheit. Expected precipitation is 1 percent, with current humidity at 62 percent, and air pressure at 30.02 in. Visibility is 5 nautical miles. There are 2 current weather alert(s).

    Weather Alerts
    Air Quality Alert - 3:28pm Fri Jul 17 2026

    ...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT EDT SATURDAY NIGHT...

    The New York State Department of Environmental Conservation has
    issued an Air Quality Health Advisory for the following counties:

    New York, Bronx, Kings, Queens, Richmond, Nassau, Suffolk,
    Westchester, Rockland, Orange, Putnam.

    until midnight EDT Saturday night.

    Air quality levels in outdoor air are predicted to be greater than
    an Air Quality Index value of 100 for the pollutant of Fine
    Particulates. The Air Quality Index, or AQI, was created as an easy
    way to correlate levels of different pollutants to one scale. The
    higher the AQI value, the greater the health concern.

    When pollution levels are elevated, the New York State Department of
    Health recommends that individuals consider limiting strenuous
    outdoor physical activity to reduce the risk of adverse health
    effects. People who may be especially sensitive to the effects of
    elevated levels of pollutants include the very young, and those with
    preexisting respiratory problems such as asthma or heart disease.
    Those with symptoms should consider consulting their personal
    physician.

    For additional information, please visit the New York State
    Department of Environmental Conservation website at,
    https://on.ny.gov/nyaqi, or call the Air Quality Hotline at
    1 800 5 3 5, 1 3 4 5.

    Small Craft Advisory - 2:36pm Fri Jul 17 2026

    ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON SATURDAY TO MIDNIGHT EDT SATURDAY NIGHT...

    WHAT: South winds 10 to 15 kt with gusts up to 25 kt.

    WHERE: Long Island Sound east of Port Jefferson and New
    Haven, Peconic and Gardiners Bays, and South Shore Bays from
    Jones Inlet through Shinnecock Bay.

    WHEN: From noon Saturday to midnight EDT Saturday night.

    IMPACTS: Conditions will be hazardous to small craft.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Inexperienced mariners, especially those operating smaller
    vessels, should avoid navigating in hazardous conditions.

    &&