Oceanside Weather Forecast

    • 69
    • 75

    Increasing Clouds

    • 70
    • 75

    Partly Sunny

    • 70
    • 76

    Partly Sunny

    • 70
    • 77

    Mostly Cloudy

    • 68
    • 75

    Partly Sunny

    • 67
    • 74

    Mostly Sunny

Today 23 Sep San Diego County Coastal Areas

Partly cloudy in the morning. Becoming mostly sunny. Highs 76 to 81 near the coast to 82 to 86 inland. Light Winds becoming west 10 Mph in the afternoon.

Tonight 23 Sep San Diego County Coastal Areas

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 64 to 68. Light Winds.

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  • Temperature Real-Time

Oceanside Temperature Statistics

September Temperature

Oceanside, Oceanside Municipal Airport (1.9 miles)

  • Lowest 3 September, 2026

    56.6 °F

  • Average September

    74.3 °F

  • Highest 7 September, 2026

    100.7 °F

Climate (2021–2026)

Oceanside, Oceanside Municipal Airport (1.9 miles)

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  • Average Low 2021–2026

    53 °F

  • Average 2021–2026

    62.8 °F

  • Average High 2021–2026

    72.3 °F
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