Heckscher State Park Weather Forecast
- 70
- 79
Mostly Sunny
- 66
- 82
Chance Rain Showers
- 65
- 75
Mostly Cloudy
- 64
- 74
Slight Chance Rain Showers
- 64
- 73
Slight Chance Rain Showers
- 65
- 76
Mostly Sunny
Today 16 Aug Southwest Suffolk
Mostly cloudy this Morning, then becoming mostly sunny. Highs around 80. Southeast Winds 5 to 10 Mph.
Tonight 16 Aug Southwest Suffolk
Partly cloudy. Humid with Lows in the upper 60s. South Winds 5 to 10 Mph.
Heckscher State Park Temperature Statistics
August Temperature
Islip, Long Island Mac Arthur Airport (6.2 miles)
Lowest 9 August, 2025
56.6 °FAverage August
73.9 °FHighest 4 August, 2025
89.7 °F
Climate (2020–Present)
Islip, Long Island Mac Arthur Airport (6.2 miles)
Average Low 2020–2025
47.4 °FAverage 2020–2025
55.2 °FAverage High 2020–2025
63 °F