Bellport Bay - John Boyle Island Weather Forecast
- 61
- 70
Partly Sunny
- 62
- 75
Partly Sunny
- 64
- 74
Partly Sunny
- 58
- 74
Partly Sunny
- 58
- 72
Chance Rain Showers
- 59
- 73
Slight Chance Rain Showers
- 58
- 75
Partly Sunny
Today 13 Sep Southwest Suffolk
Sunny. Highs in the lower 70s. South Winds around 10 Mph.
Tonight 13 Sep Southwest Suffolk
Partly cloudy. Lows in the lower 60s. Southwest Winds 5 to 10 Mph.
Bellport Bay - John Boyle Island Temperature Statistics
September Temperature
Shirley, Brookhaven Airport (5.6 miles)
Lowest 9 September, 2025
48.9 °FAverage September
65.1 °FHighest 6 September, 2025
79 °F
Climate (2020–Present)
Shirley, Brookhaven Airport (5.6 miles)
Average Low 2020–2025
46.6 °FAverage 2020–2025
54.9 °FAverage High 2020–2025
63 °F