Brentwood Weather Forecast
- 70
- 85
Partly Sunny
- 72
- 81
Rain Showers Likely
- 73
- 90
Mostly Sunny
- 75
- 92
Mostly Sunny
- 70
- 91
Partly Sunny
- 67
- 83
Chance Rain Showers
Today 26 Jul Southwest Suffolk
Mostly sunny. Highs in the lower 80s. Northeast Winds 5 to 10 Mph, becoming southeast 10 to 15 Mph in the afternoon.
Tonight 26 Jul Southwest Suffolk
Partly cloudy. Lows in the lower 70s. North Winds 5 to 10 Mph.
Brentwood Temperature Statistics
July Temperature
Islip, Long Island Mac Arthur Airport (7.5 miles)
Lowest 23 July, 2025
64 °FAverage July
77.9 °FHighest 8 July, 2025
92.6 °F
Climate (2020–Present)
Islip, Long Island Mac Arthur Airport (7.5 miles)
Average Low 2020–2025
47.5 °FAverage 2020–2025
55.2 °FAverage High 2020–2025
63 °F