Skip to content
Voykit

When to go · San Diego

San Diego in August

Mixed month. Outside the best window (Mar–May, Sep–Nov). Across United States: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.

Key facts

Verdict
Mixed
Temperature
25°C (77°F) / 19°C (66°F)
average high / low
Rain days
1
Crowds
High
United States overall
Prices
High
United States overall

Verdict

MixedUnited States month rating

Outside the best window (Mar–May, Sep–Nov). Across United States: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.

Is another month better than August?

August is rated mixed. These months rate higher:

Weather in August

Long-term averages
  • San DiegoHighs around 25 °C (77 °F), lows around 19 °C (66 °F), rain on about 1 day
  • California coast, United States · San Francisco, Los Angeles, San Diego, Big Surbest weather

    Mild all year; San Francisco is foggy and cool in summer; wildfire smoke possible June–November; winter storms can close Highway 1 at Big Sur.

Crowds and prices

Crowds · United States overall
High
Prices · United States overall
High

United States overall: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.

High-price month: see what to book ahead.

Compare two months

Weather, crowds and prices for any two months in San Diego, side by side.

  • Verdict

    Aug: Mixed

    Mar: Great (better)

  • Daytime high

    Aug: 25 °C (77 °F)

    Mar: 19 °C (66 °F)

  • Night low

    Aug: 19 °C (66 °F)

    Mar: 13 °C (55 °F)

  • Rain days

    Aug: 1 (better)

    Mar: 6

  • Crowds

    Aug: High

    Mar: Medium

  • Prices

    Aug: High

    Mar: Medium

  • Festivals listed

    Aug: 0

    Mar: 2

August: Outside the best window (Mar–May, Sep–Nov). Across United States: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.

March: Inside San Diego's best window: Mar–May, Sep–Nov.

San Diego: figures are long-term averages from this guide, not a forecast.

What to pack

Nothing unusual for the weather this month.

Build the full packing list for your trip →

Across United States in August →