Saint Martin Bay Weather Forecast

    • 46
    • 64

    Rain Showers

    • 57
    • 63

    Rain Showers

    • 52
    • 70

    Chance Rain Showers

    • 55
    • 67

    Mostly Cloudy

    • 53
    • 69

    Chance Rain Showers

    • 55
    • 66

    Chance Rain Showers

Today 13 Sep Eastern Mackinac

Partly sunny. Isolated rain Showers Early, then scattered rain Showers in the afternoon. Highs in the mid 60s. Northwest Winds 5 to 15 Mph with Gusts to around 30 Mph. Chance of Showers 50 percent.

Tonight 13 Sep Eastern Mackinac

Mostly clear. Isolated rain Showers early. Lows in the lower 40s. Northwest Winds up to 10 Mph. Gusts up to 25 Mph early. Chance of Showers 20 percent.

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Saint Martin Bay Temperature Statistics

September Temperature

Mackinac Island Airport (9.3 miles)

  • Lowest 11 September, 2026

    50 °F

  • Average September

    65.8 °F

  • Highest 1 September, 2026

    78.8 °F

Climate (2021–2026)

Mackinac Island Airport (9.3 miles)

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  • Average Low 2021–2026

    38.1 °F

  • Average 2021–2026

    44.5 °F

  • Average High 2021–2026

    50.9 °F
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