Onset Beach Weather Forecast

    • 23
    • 50

    Gradual Clearing

    • 28
    • 33

    Partly Sunny

    • 31
    • 40

    Chance Snow

    • 24
    • 39

    Chance Snow

    • 16
    • 32

    Slight Chance Snow

    • 12
    • 24

    Partly Sunny

Today 15 Jan Southern Plymouth

Mostly sunny. Highs around 50. Temperature falling into the lower 40s late. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 15 Jan Southern Plymouth

Mostly cloudy. Much cooler with Lows around 20. West Winds 10 to 15 Mph with Gusts up to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Onset Beach Temperature Statistics

January Temperature

Otis Air National Guard Base (9.3 miles)

  • Lowest 5 January, 2026

    14 °F

  • Average January

    31.6 °F

  • Highest 9 January, 2026

    51.8 °F

Climate (2021–Present)

Otis Air National Guard Base (9.3 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    59.2 °F
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