Lake Tynan Weather Forecast

    • 55
    • 74

    Increasing Clouds

    • 56
    • 74

    Partly Sunny

    • 55
    • 70

    Mostly Cloudy

    • 55
    • 69

    Mostly Cloudy

    • 56
    • 73

    Partly Sunny

    • 60
    • 83

    Partly Sunny

    • 60
    • 84

    Mostly Sunny

Today 18 Sep Northern Monterey Bay

Sunny. Highs in the mid 70s to lower 80s. Southwest Winds 5 to 10 Mph.

Tonight 18 Sep Northern Monterey Bay

Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the mid 50s. Southeast Winds 5 to 10 Mph in the evening. Becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Tynan Temperature Statistics

September Temperature

Watsonville, Watsonville Municipal Airport (3.1 miles)

  • Lowest 7 September, 2026

    49.6 °F

  • Average September

    66.5 °F

  • Highest 9 September, 2026

    102.7 °F

Climate (2021–2026)

Watsonville, Watsonville Municipal Airport (3.1 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    68.3 °F
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