Thunder Bay National Marine Sanctuary Weather Forecast

    • 68
    • 72

    Increasing Clouds

    • 69
    • 72

    Chance Rain Showers

    • 66
    • 73

    Chance Rain Showers

    • 67
    • 71

    Mostly Sunny

    • 66
    • 73

    Chance Rain Showers

    • 64
    • 71

    Chance Rain Showers

    • 65
    • 68

    Partly Sunny

Today 14 Aug Alpena

Mostly sunny. Highs in the upper 70s. Northeast Winds 5 to 10 Mph.

Tonight 14 Aug Alpena

Mostly clear. Patchy fog. Lows in the mid 50s. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Thunder Bay National Marine Sanctuary Temperature Statistics

August Temperature

Alpena, Alpena County Regional Airport (22.4 miles)

  • Lowest 3 August, 2026

    52.6 °F

  • Average August

    69.4 °F

  • Highest 4 August, 2026

    86.6 °F

Climate (2021–2026)

Alpena, Alpena County Regional Airport (22.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    36.8 °F

  • Average 2021–2026

    46.6 °F

  • Average High 2021–2026

    56.3 °F
Get WillyWeather+ to remove ads