Agate Beach Weather Forecast

    • 58
    • 65

    Chance Rain Showers

    • 58
    • 66

    Chance Rain Showers

    • 56
    • 68

    Patchy Fog

    • 57
    • 69

    Mostly Sunny

    • 58
    • 72

    Partly Sunny

    • 59
    • 68

    Chance Rain Showers

Today 18 Sep Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy. A chance of Showers. Isolated Thunderstorms in the afternoon. Highs in the mid 60s to lower 70s. Southwest Winds 5 to 10 Mph.

Tonight 18 Sep Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy. Patchy fog. A chance of Showers and isolated Thunderstorms. Lows in the upper 50s. Southwest Winds around 5 Mph in the evening. Becoming light.

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Agate Beach Temperature Statistics

September Temperature

Novato / Gnoss Field (18.6 miles)

  • Lowest 1 September, 2025

    51.8 °F

  • Average September

    66.1 °F

  • Highest 15 September, 2025

    96.8 °F

Climate (2020–Present)

Novato / Gnoss Field (18.6 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57.5 °F

  • Average High 2020–2025

    72.6 °F
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