Uncatena Island (South Side) Weather Forecast

    • 63
    • 71

    Rain Showers

    • 52
    • 75

    Rain Showers Likely

    • 50
    • 67

    Mostly Sunny

    • 59
    • 72

    Mostly Sunny

    • 58
    • 72

    Slight Chance Rain Showers

    • 54
    • 72

    Chance Rain Showers

Today 13 Sep Dukes

Showers with a chance of Thunderstorms. Patchy fog. Some Thunderstorms may produce frequent lightning and heavy rainfall. Locally heavy rainfall possible. Highs in the lower 70s. South Winds 10 to 15 Mph. Chance of rain near 100 percent.

Tonight 13 Sep Dukes

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Patchy fog. Humid with Lows in the lower 60s. West Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Uncatena Island (South Side) Temperature Statistics

September Temperature

Marthas Vineyard Airport (9.3 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    68.2 °F

  • Highest 4 September, 2026

    81 °F

Climate (2021–2026)

Marthas Vineyard Airport (9.3 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    60.5 °F
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