Oceanside Weather Forecast

    • 66
    • 70

    Gradual Clearing

    • 67
    • 70

    Partly Sunny

    • 69
    • 73

    Patchy Fog

    • 69
    • 74

    Slight Chance Thunderstorms

    • 69
    • 74

    Slight Chance Thunderstorms

    • 69
    • 73

    Slight Chance Thunderstorms

Today 14 Sep San Diego County Coastal Areas

Cloudy with patchy fog in the morning. Becoming mostly sunny. Highs 71 to 76 near the coast to 76 to 81 inland. Light Winds becoming west 10 Mph in the afternoon.

Tonight 14 Sep San Diego County Coastal Areas

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 60 to 63. Light Winds.

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Oceanside Temperature Statistics

September Temperature

Oceanside, Oceanside Municipal Airport (1.9 miles)

  • Lowest 11 September, 2025

    59 °F

  • Average September

    70.4 °F

  • Highest 2 September, 2025

    82 °F

Climate (2020–Present)

Oceanside, Oceanside Municipal Airport (1.9 miles)

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  • Average Low 2020–2025

    52.7 °F

  • Average 2020–2025

    62.3 °F

  • Average High 2020–2025

    71.8 °F
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