San Francisco Bay - Fort Mason Weather Forecast

    • 53
    • 60

    Increasing Clouds

    • 55
    • 58

    Decreasing Clouds

    • 55
    • 60

    Partly Sunny

    • 54
    • 59

    Partly Sunny

    • 54
    • 58

    Partly Sunny

    • 55
    • 58

    Mostly Sunny

    • 54
    • 61

    Mostly Sunny

Today 21 May San Francisco

Sunny. Highs in the upper 50s to lower 70s. West Winds around 10 Mph.

Tonight 21 May San Francisco

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower 50s. Southwest Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

San Francisco Bay - Fort Mason Temperature Statistics

May Temperature

Oakland, Metro Oakland International Airport (12.4 miles)

  • Lowest 16 May, 2026

    48.7 °F

  • Average May

    61.2 °F

  • Highest 18 May, 2026

    82 °F

Climate (2021–Present)

Oakland, Metro Oakland International Airport (12.4 miles)

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

  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    58.8 °F

  • Average High 2021–2026

    67.1 °F
Get WillyWeather+ to remove ads