Onset Island Weather Forecast

    • 62
    • 70

    Decreasing Clouds

    • 67
    • 72

    Chance Thunderstorms

    • 64
    • 72

    Chance Rain Showers

    • 68
    • 76

    Mostly Cloudy

    • 69
    • 79

    Chance Rain Showers

    • 68
    • 82

    Partly Sunny

Today 27 Jun Southern Plymouth

Mostly cloudy in the Morning, then becoming mostly sunny. Highs in the lower 70s. East Winds 10 to 15 Mph.

Tonight 27 Jun Southern Plymouth

Mostly cloudy. A chance of Showers after midnight. Lows in the lower 60s. Southeast Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Onset Island Temperature Statistics

June Temperature

Otis Air National Guard Base (8.7 miles)

  • Lowest 1 June, 2025

    51.8 °F

  • Average June

    66.6 °F

  • Highest 24 June, 2025

    95 °F

Climate (2020–Present)

Otis Air National Guard Base (8.7 miles)

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  • Average Low 2020–2025

    44.2 °F

  • Average 2020–2025

    52.3 °F

  • Average High 2020–2025

    59.5 °F
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