🇺🇸 San Francisco · When to go
The best time to visit San Francisco
San Francisco famously defies the seasons — its sunniest, warmest weather comes in September–October (the local “Indian summer”), not summer. Summer (June–August) is often cool and foggy; spring is mild; winter is mild but the wettest. Pack layers whenever you visit.
Best overall
September–October — the warmest, clearest, sunniest stretch.
Best weather
Early autumn (September–October); spring is mild too.
Fewer crowds
Winter (the wet, quiet low season).
Lowest prices
Winter (November–February) is cheapest.
When to avoid
Expecting hot “summer” weather in July–August (it’s often cool and foggy); midwinter for the most rain.
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San Francisco season by season
Mild, green and increasingly clear with moderate crowds — a pleasant, good-value time.
Busiest with visitors, but often cool, breezy and foggy (“Karl the Fog”), especially near the coast — bring layers.
The warmest, sunniest and clearest weather of the year — the best time to visit.
Mild but the wettest season, with rain spells; quietest and cheapest, with the odd crisp, clear day.
Key events & holidays
Pride (June, one of the world’s biggest), Outside Lands (summer), Fleet Week (October), and the autumn “Indian summer” peak.
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Plan my San Francisco trip — freeBest time to visit San Francisco — FAQs
When is the best time to visit San Francisco?
September–October — the city’s warmest, sunniest and clearest weather, often nicer than summer.
Why is summer cold in San Francisco?
Coastal fog (“Karl the Fog”) and cool ocean air keep summer breezy and chilly, especially near the water — bring layers even in July.
What is the cheapest time to visit San Francisco?
Winter (November–February) is cheapest and quietest, though it’s the wettest season.
Do I need to pack for cold weather?
Yes — temperatures swing a lot through the day and fog rolls in, so layers and a windproof jacket help any time of year.
Weather, prices and event dates vary year to year — always check current forecasts and schedules before you book. Some links are affiliate links; Wavvia may earn a small commission at no extra cost to you.