🌡️ Bay Area Weather

The defining Bay Area weather fact: SF and Santa Clara feel like different climates. SF in June-July averages 65-68°F with cool fog ("Karl"). Santa Clara (the stadium) averages 80-85°F sunny. Bring layers. Mark Twain's joke applies to SF; the South Bay is California-warm.

Two Climates June–July Mediterranean

Right Now (San Francisco)

Current Conditions

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San Francisco · Live via Open-Meteo

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Wind mph

SF data via Open-Meteo · Santa Clara is typically 15-20°F warmer + sunny

Two Climates · One Region

San Francisco (June-July)

66°F / 19°C

Avg high · Lows 54-57°F (12-14°C)

Famous fog ("Karl the Fog" on Twitter) rolls in mornings and evenings. Often cool, cloudy, breezy. June can feel like January in the Sunset/Outer Richmond. Mark Twain: "the coldest winter I ever spent was a summer in San Francisco." Bring a fleece, windbreaker, and warm layers — even for "summer."

Santa Clara / Stadium (June-July)

82°F / 28°C

Avg high · Lows 55-60°F (13-16°C)

Significantly warmer than SF — south of the SF microclimate. Sunny inland, much warmer afternoons, cooler evenings. June afternoons are mid-80s, July occasionally hits 90°F. Levi's Stadium is open-air; bring sun protection. The dual-climate split means you'll wear different clothes in SF (mornings/evenings) vs the South Bay (matchdays).

World Cup Season Forecast (San Francisco)

May

65°F / 18°C

Avg high · Low 51°F / 11°C

Spring in SF. Less fog than summer ironically. Wildflowers in Marin Headlands, dry Napa hills.

June ★ World Cup

66°F / 19°C

Avg high · Low 54°F / 12°C

SF's foggy season begins. Mornings cool/gray, afternoons clearing for some sun. Virtually no rain. South Bay 75-82°F + sunny.

July ★ World Cup

68°F / 20°C

Avg high · Low 56°F / 13°C

Peak fog month for SF. Densest fog at Ocean Beach, Twin Peaks, Outer Sunset. Inner districts (Mission, Castro) often warmer. Santa Clara hits 85-90°F.

August

68°F / 20°C

Avg high · Low 56°F / 13°C

Similar to July. Ironically late-summer (Sep-Oct) is SF's warmest, sunniest period — "Indian Summer."

What to Expect

Bay Area Summer Reality

The Bay Area has a Mediterranean climate — dry summers, mild wet winters. The defining summer fact is the microclimate split: SF and the coast are cool and foggy, while inland (San Jose, Napa, Santa Clara) is warm and sunny. Virtually no rain June-September.

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SF Fog ("Karl") Is Real

San Francisco's marine fog ("Karl the Fog" — the city personifies it on social media) rolls in nearly every June-July afternoon and evening from the Pacific. The Sunset, Richmond, and Twin Peaks neighborhoods get hit hardest. Mission, SoMa, North Beach, and the Embarcadero are typically clearer. Foggy = cold (50s-low 60s); clear = warmer (high 60s).

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Santa Clara Is California-Warm

The South Bay is shielded from the marine fog by the SF Peninsula and coastal hills. Santa Clara, San Jose, Mountain View are reliably sunny and 80-85°F afternoons. Levi's Stadium is open-air — sun protection essential for matchdays. Evenings cool to 55-60°F so bring a layer.

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Wind Is the Other Story

SF gets steady afternoon winds (15-25 mph) from the Pacific — most noticeable on the Embarcadero, the Marina, and Ocean Beach. Layered, fitted clothing handles it; flowy dresses and sun hats won't survive an SF afternoon. Levi's Stadium can also be windy in afternoons.

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Levi's Stadium Is Open-Air

Levi's has no roof and minimal cover. Most seats face full sun for 12 PM PT kickoffs. Bring sunscreen, sunglasses, hat. The stadium runs hot during day matches but cools quickly after sunset. Lower-bowl seats on the western side get the worst of the afternoon sun.

Match Day Weather Tips

Staying Comfortable

Noon Kickoffs (12 PM PT)

Hottest part of the day in Santa Clara — 75-85°F + sun. Sunscreen mandatory. Hat. Sunglasses. Cool layer for SF morning before transit.

Afternoon Kickoffs (3 PM PT)

80-85°F at Santa Clara kickoff, dropping to 70°F by full-time. Comfortable. Bring a layer for the post-match transit back to SF (foggy + cold).

Outside the Stadium (Fan Festivals)

Embarcadero (SF): cool + windy + foggy afternoons (60s + windbreaker). Plaza de César Chávez (San Jose): sunny + warm (80s + sunscreen).

Evening Match Travel

SF → stadium → SF roundtrip means three different climates in 12 hours: SF foggy 60°F → Santa Clara sunny 85°F → SF foggy 55°F. Layers essential.

What to Pack

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Bay Area June / July Essentials

Layered system — fleece + windbreaker for SF mornings/evenings, T-shirt + sunscreen for Santa Clara afternoons · Compact umbrella unnecessary (no rain) but a wind shell is essential for SF · SPF 30-50+ sunscreen · Sunglasses · Hat for stadium · Reusable water bottle · Comfortable walking shoes (steep SF hills) · Light long-sleeve for over-AC restaurants. Pack a clear bag for Levi's Stadium — anything bigger than 12"x6"x12" is denied at the gate.