Tomales Bay - Marshall Weather Forecast

    • 54
    • 73

    Increasing Clouds

    • 53
    • 66

    Mostly Cloudy

    • 54
    • 65

    Mostly Cloudy

    • 55
    • 70

    Partly Sunny

    • 54
    • 68

    Partly Sunny

    • 53
    • 65

    Partly Sunny

Today 23 Aug Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy late in the morning then becoming partly cloudy. Highs in the upper 60s to mid 70s. Southwest Winds around 5 Mph.

Tonight 23 Aug Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy. Lows in the lower 50s. Southwest Winds around 5 Mph.

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Tomales Bay - Marshall Temperature Statistics

August Temperature

Petaluma Municipal Airport (16.8 miles)

  • Lowest 10 August, 2026

    46.4 °F

  • Average August

    62.7 °F

  • Highest 2 August, 2026

    93.2 °F

Climate (2021–2026)

Petaluma Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    68.5 °F
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