Mount Sinai Harbor Weather Forecast
- 39
- 50
Rain
- 34
- 43
Rain Showers
- 37
- 43
Partly Sunny
- 40
- 47
Chance Rain
- 43
- 50
Rain Likely
- 29
- 47
Partly Sunny
Today 22 Mar Northwest Suffolk
Mostly cloudy. A chance of rain this afternoon. Highs in the mid 50s. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 40 percent.
Tonight 22 Mar Northwest Suffolk
Rain. Lows in the upper 30s. South Winds 5 to 10 Mph, becoming north after midnight. Chance of rain 90 percent.
Mount Sinai Harbor Temperature Statistics
March Temperature
Islip, Long Island Mac Arthur Airport (11.8 miles)
Lowest 3 March, 2026
18.6 °FAverage March
40.4 °FHighest 9 March, 2026
68.6 °F
Climate (2021–Present)
Islip, Long Island Mac Arthur Airport (11.8 miles)
Average Low 2021–2026
47.3 °FAverage 2021–2026
55.1 °FAverage High 2021–2026
63 °F