Tomales Bay State Park Weather Forecast

    • 51
    • 61

    Partly Sunny

    • 55
    • 61

    Chance Rain

    • 52
    • 61

    Chance Rain

    • 54
    • 60

    Chance Rain

    • 53
    • 63

    Slight Chance Rain

    • 52
    • 65

    Partly Sunny

Today 23 Oct Coastal North Bay Including Point Reyes National Seashore

Partly cloudy. Highs in the 60s. Northwest Winds 5 to 10 Mph.

Tonight 23 Oct Coastal North Bay Including Point Reyes National Seashore

Partly cloudy. Lows in the lower 50s. Northwest Winds 5 to 10 Mph.

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Tomales Bay State Park Temperature Statistics

October Temperature

Petaluma Municipal Airport (18 miles)

  • Lowest 17 October, 2025

    41 °F

  • Average October

    56.6 °F

  • Highest 7 October, 2025

    86 °F

Climate (2020–Present)

Petaluma Municipal Airport (18 miles)

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  • Average Low 2020–2025

    44.4 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    68.8 °F
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