Trinidad State Beach Weather Forecast

    • 54
    • 59

    Cloudy

    • 54
    • 59

    Mostly Cloudy

    • 54
    • 60

    Mostly Cloudy

    • 54
    • 61

    Mostly Cloudy

    • 54
    • 60

    Chance Rain

    • 52
    • 59

    Mostly Cloudy

    • 52
    • 59

    Partly Sunny

Today 20 Sep Northern Coastal Humboldt

Partly cloudy. Lows 43 to 53. Highs 60 to 71.

Tonight 20 Sep Northern Coastal Humboldt

Cloudy. Patchy fog. Lows 47 to 57. Northwest wind around 5 Mph.

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Trinidad State Beach Temperature Statistics

September Temperature

Arcata / Eureka, Arcata Airport (5.6 miles)

  • Lowest 5 September, 2026

    46.7 °F

  • Average September

    58.7 °F

  • Highest 9 September, 2026

    75.7 °F

Climate (2021–2026)

Arcata / Eureka, Arcata Airport (5.6 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    59.8 °F
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