Castle Island Weather Forecast

    • 62
    • 70

    Rain Showers

    • 66
    • 73

    Rain Showers Likely

    • 66
    • 78

    Rain Showers Likely

    • 62
    • 81

    Mostly Sunny

    • 58
    • 73

    Partly Sunny

    • 57
    • 72

    Mostly Sunny

Today 1 Sep Newport

Showers in the Morning, then Showers likely with a slight chance of Thunderstorms in the afternoon. Patchy fog. Humid with Highs around 70. Southeast Winds 10 to 15 Mph. Chance of rain 80 percent.

Tonight 1 Sep Newport

Mostly cloudy with a 50 percent chance of Showers. Near steady temperature in the upper 60s. South Winds around 5 Mph.

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Castle Island Temperature Statistics

September Temperature

N. Kingston / Quonset (7.5 miles)

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  • Average September

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Climate (2021–2026)

N. Kingston / Quonset (7.5 miles)

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  • Average Low 2021–2026

    49.8 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    61 °F
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