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Mount Sinai, NY Marine Weather Forecast

This Afternoon - 101°F
Jul 03, 2026
12 mph W
Sunny
Sunny. High near 101, with temperatures falling to around 97 in the afternoon. Heat index values as high as 110. West wind around 12 mph.
Tonight - 77°F
Jul 03, 2026
5 to 10 mph W
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 77. Heat index values as high as 102. West wind 5 to 10 mph. Chance of precipitation is 30%.
Independence Day - 99°F
Jul 04, 2026
6 to 10 mph W
Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 4pm and 5pm, then a chance of showers and thunderstorms. Sunny. High near 99, with temperatures falling to around 92 in the afternoon. Heat index values as high as 107. West wind 6 to 10 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday Night - 73°F
Jul 04, 2026
5 to 8 mph NW
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a low around 73. Heat index values as high as 98. Northwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday - 89°F
Jul 05, 2026
9 mph E
Chance Rain Showers
A chance of rain showers before 5pm, then a chance of showers and thunderstorms. Partly sunny. High near 89, with temperatures falling to around 85 in the afternoon. East wind around 9 mph. Chance of precipitation is 40%.
Sunday Night - 68°F
Jul 05, 2026
6 to 9 mph SE
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday - 84°F
Jul 06, 2026
9 to 14 mph E
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a high near 84. Chance of precipitation is 70%.
Monday Night - 67°F
Jul 06, 2026
10 to 14 mph E
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.
Tuesday - 83°F
Jul 07, 2026
15 mph E
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers and thunderstorms likely before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.
Tuesday Night - 67°F
Jul 07, 2026
7 to 12 mph NE
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Wednesday - 86°F
Jul 08, 2026
9 mph SE
Chance Rain Showers
A chance of rain showers before 2pm. Partly sunny, with a high near 86. Chance of precipitation is 30%.
Wednesday Night - 70°F
Jul 08, 2026
1 to 8 mph SW
Partly Cloudy
Partly cloudy, with a low around 70.
Thursday - 89°F
Jul 09, 2026
0 to 12 mph SW
Mostly Sunny
Mostly sunny, with a high near 89.
Thursday Night - 72°F
Jul 09, 2026
6 to 12 mph SW
Partly Cloudy
Partly cloudy, with a low around 72.

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