Harry A. Merlo State Recreation Area Weather Forecast

    • 41
    • 57

    Mostly Cloudy

    • 42
    • 56

    Mostly Cloudy

    • 42
    • 55

    Rain

    • 38
    • 52

    Rain

    • 35
    • 51

    Rain Likely

    • 41
    • 59

    Mostly Sunny

Today 29 Mar Northern Humboldt Coast

Mostly cloudy in the morning then becoming partly cloudy. Patchy fog in the morning. Highs 58 to 68. Northwest wind 5 to 15 Mph.

Tonight 29 Mar Northern Humboldt Coast

Mostly cloudy. Patchy fog overnight. Lows 39 to 49. North wind 5 to 15 Mph.

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  • Temperature Forecast NOAA

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Harry A. Merlo State Recreation Area Temperature Statistics

March Temperature

Arcata / Eureka, Arcata Airport (14.3 miles)

  • Lowest 11 March, 2026

    35.7 °F

  • Average March

    51 °F

  • Highest 24 March, 2026

    67.6 °F

Climate (2021–Present)

Arcata / Eureka, Arcata Airport (14.3 miles)

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  • Average Low 2021–2026

    45.6 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    59.5 °F
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