Arcata Bay Weather Forecast

    • 51
    • 58

    Partly Sunny

    • 52
    • 59

    Partly Sunny

    • 54
    • 60

    Partly Sunny

    • 55
    • 61

    Mostly Cloudy

    • 54
    • 60

    Mostly Cloudy

    • 54
    • 59

    Partly Sunny

Today 27 Sep Northern Coastal Humboldt

Mostly cloudy in the morning then becoming partly cloudy. Patchy fog in the morning. Highs 57 to 67. North wind around 10 Mph.

Tonight 27 Sep Northern Coastal Humboldt

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog. Lows 43 to 53. Northwest wind around 10 Mph shifting to the northeast overnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Arcata Bay Temperature Statistics

September Temperature

Arcata / Eureka, Arcata Airport (9.3 miles)

  • Lowest 24 September, 2026

    45 °F

  • Average September

    58.4 °F

  • Highest 9 September, 2026

    75.7 °F

Climate (2021–2026)

Arcata / Eureka, Arcata Airport (9.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    59.8 °F
Get WillyWeather+ to remove ads