Alameda Harbor - Coast Guard Island Weather Forecast

    • 53
    • 68

    Increasing Clouds

    • 54
    • 71

    Mostly Cloudy

    • 53
    • 66

    Partly Sunny

    • 51
    • 70

    Mostly Sunny

    • 53
    • 74

    Mostly Sunny

    • 55
    • 77

    Partly Sunny

Today 27 May San Francisco Bay Shoreline

Partly cloudy. Highs in the mid 60s to lower 70s. South Winds up to 5 Mph increasing to west 10 to 20 Mph in the afternoon.

Tonight 27 May San Francisco Bay Shoreline

Partly cloudy. Lows in the lower 50s. Southwest Winds 5 to 10 Mph.

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Alameda Harbor - Coast Guard Island Temperature Statistics

May Temperature

Oakland, Metro Oakland International Airport (4.3 miles)

  • Lowest 16 May, 2026

    48.7 °F

  • Average May

    61.4 °F

  • Highest 18 May, 2026

    82.7 °F

Climate (2021–Present)

Oakland, Metro Oakland International Airport (4.3 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    58.8 °F

  • Average High 2021–2026

    67.1 °F
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