Tomales Bay - Marshall Weather Forecast

    • 51
    • 64

    Decreasing Clouds

    • 52
    • 65

    Partly Sunny

    • 54
    • 71

    Mostly Sunny

    • 53
    • 76

    Patchy Fog

    • 53
    • 73

    Areas Fog

    • 54
    • 71

    Areas Fog

Today 18 Aug Coastal North Bay Including Point Reyes National Seashore

Sunny. Highs in the 60s. West Winds 5 to 10 Mph.

Tonight 18 Aug Coastal North Bay Including Point Reyes National Seashore

Mostly clear in the evening then becoming partly cloudy. Patchy fog after midnight. Lows in the lower 50s. West Winds 5 to 10 Mph.

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Tomales Bay - Marshall Temperature Statistics

August Temperature

Petaluma Municipal Airport (16.8 miles)

  • Lowest 3 August, 2025

    46.4 °F

  • Average August

    62.7 °F

  • Highest 6 August, 2025

    87.8 °F

Climate (2020–Present)

Petaluma Municipal Airport (16.8 miles)

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  • Average Low 2020–2025

    44.5 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    69.1 °F
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