Castle Island Weather Forecast
- 58
- 74
Slight Chance Rain Showers
- 61
- 72
Chance Rain Showers
- 62
- 76
Chance Rain Showers
- 54
- 81
Mostly Sunny
- 51
- 68
Mostly Sunny
- 56
- 69
Partly Sunny
Today 16 Sep Newport
Mostly sunny. Patchy fog in the morning. Highs in the lower 70s. Northeast Winds 10 to 15 Mph.
Tonight 16 Sep Newport
Mostly cloudy. Lows in the upper 50s. East Winds 5 to 10 Mph.
Castle Island Temperature Statistics
September Temperature
N. Kingston / Quonset (7.5 miles)
Lowest 4 September, 2025
53.6 °FAverage September
65.1 °FHighest 6 September, 2025
78.8 °F
Climate (2020–Present)
N. Kingston / Quonset (7.5 miles)
Average Low 2020–2025
50.7 °FAverage 2020–2025
56.3 °FAverage High 2020–2025
61.2 °F