Onset Beach Weather Forecast

    • 66
    • 79

    Decreasing Clouds

    • 64
    • 75

    Chance Rain Showers

    • 64
    • 73

    Rain Showers

    • 65
    • 73

    Chance Rain Showers

    • 65
    • 74

    Chance Rain Showers

    • 62
    • 74

    Chance Rain Showers

Today 30 Aug Southern Plymouth

Partly sunny. Highs in the lower 80s. Southwest Winds 10 to 15 Mph. Gusts up to 25 Mph this afternoon.

Tonight 30 Aug Southern Plymouth

Mostly cloudy. A chance of Showers, mainly in the evening. Humid with Lows in the mid 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming west around 5 Mph after midnight. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Onset Beach Temperature Statistics

August Temperature

Otis Air National Guard Base (9.3 miles)

  • Lowest 16 August, 2026

    55.4 °F

  • Average August

    72.7 °F

  • Highest 7 August, 2026

    89.6 °F

Climate (2021–2026)

Otis Air National Guard Base (9.3 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    51.8 °F

  • Average High 2021–2026

    59.1 °F
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