Is San Jose airport loud, and which areas get the worst of it?

It depends heavily on where you are relative to the two parallel runways. SJC sits almost entirely inside the city — about 3 miles north-west of downtown with no buffer of open land or water — so noise lands on dense residential neighborhoods. The worst-affected areas are north Santa Clara (under the Rwy 30 departure climb-out, where residents have reported backyard levels near 90 dB), downtown San Jose and Naglee Park (under low arrivals), and north Sunnyvale (under low south-flow arrivals). Drop a pin on the map above to see your specific street.

Why do planes fly low over Santa Clara and Sunnyvale early in the morning?

Both sit on the airport's busiest corridors. North Santa Clara is directly under the Rwy 30 departure climb-out in the predominant north flow, so it catches jets accelerating off the runway at low altitude — the single biggest source of organized SJC complaints. North Sunnyvale is overflown by south-flow arrivals in a narrow swath at only 1,500–3,000 ft. The early-morning surge is the Stage III curfew lifting at 6:30 a.m., when delayed and scheduled departures go almost at once.

Which neighborhoods near San Jose airport are quietest?

Areas well off the north-west/south-east runway axis fare best: Cupertino and Cambrian Park to the south-west and south sit largely off the main corridors, and Palo Alto only catches the outer edge of south-flow arrivals at high altitude. Within the corridor, Willow Glen is relatively quiet during the predominant north flow and only gets busy during south-flow departures. Use the pin-drop map above to compare specific addresses.

How do I report aircraft noise at San Jose airport?

Contact the SJC Airport Noise Office at the Norman Y. Mineta San José International Airport. You can file a complaint online at flysanjose.com/noise/noise-complaint or call 408-452-0707. Logged complaints, including curfew-violation reports, feed into the airport's noise program and can be escalated to the Airport Commission.

Does the map cover all aircraft over San Jose?

Yes — the commercial jet fleet operating from SJC has near-complete ADS-B coverage, so the heatmap and route-density layers reflect actual traffic accurately. The main gaps are a small amount of general-aviation traffic, including light aircraft that use SJC and nearby fields like Reid-Hillview and Moffett, some of which may not be ADS-B-equipped.

San Jose Flight Path Noise Map – Norman Y. Mineta San José International Airport (SJC)

Name: Aircraft noise observations near Norman Y. Mineta San José International Airport
Creator: Flight Path Noise
License: https://creativecommons.org/licenses/by/4.0/

Aircraft noise around San Jose in October 2026

Loudest neighborhoods near San Jose: North Santa Clara (Lawrence Station / Rivermark), Santa Clara (central, near SCU / El Camino), Downtown San Jose / SoFA, Naglee Park, Sunnyvale (north / Lakewood). Quietest: Mountain View (north / Moffett), Palo Alto, Cupertino, Cambrian Park. Busiest around 10 AM local time averaging 715 flights/day. Source: Flight Path Noise monitoring data, 30 days to 2026-10-08.

Flights by hour · last 30 days

12a6a12p6p

Average daily traffic

715

flights / day · 21,453 total

Busiest hour

10 AM

peak 93 dB

Loudest hour

3 PM

peak 95 dB

Loudest residential area

Alviso

68 dB avg · ~192 flights/day · Busy road

North of the field along the departure fan toward the bay; overflights present but climbing.

Does San Jose Airport have a curfew?

Yes — a mandatory night curfew, 11 PM – 7 AM.

SJC runs a genuinely mandatory, FAA-approved noise-based curfew, a rarity among US airports. Louder FAR 36 Stage II aircraft may not operate between 11:00 p.m. and 7:00 a.m. Quieter Stage III aircraft (at or below 89.0 EPNdB) face a narrower window of 11:30 p.m. to 6:30 a.m. Because most modern jets are Stage III, residents commonly report a surge of departures right after the 6:30 a.m. lift. Violations carry a $2,500-per-occurrence administrative penalty, with limited exemptions for weather, mechanical, ATC delay, security and emergencies.

Norman Y. Mineta San José International Airport (SJC/KSJC) is unusual among big US airports: it sits almost entirely inside its city, only about 3 miles (4.8 km) north-west of downtown San Jose and ringed by dense Silicon Valley housing on every side, with no buffer of open land or water. Its two closely-spaced parallel runways run north-west to south-east, so SJC spends most of its time in “north flow” — jets land over downtown San Jose and Willow Glen from the south-east, then climb out to the north-west directly over north Santa Clara, Sunnyvale and toward Moffett Field. That departure corridor over Santa Clara has produced some of the loudest, most organized community pushback in the Bay Area, with residents reporting backyard noise levels near 90 dB and a surge of early-morning departures right at the curfew lift. SJC also runs a genuinely mandatory, FAA-approved noise-based curfew with $2,500 fines — a rarity in the US.

Which neighborhoods are quietest — and which aren’t

SJC operates two closely-spaced parallel runways, 12L/30R and 12R/30L, each 11,000 ft (3,353 m) of asphalt and oriented roughly 120°/300° (north-west–south-east). They sit only about 700 ft apart, so they work as a paired set: 12L/30R is the preferred jet departure runway and 12R/30L the preferred jet arrival runway. Because the field is hemmed in by city on all sides, there is no over-water relief — every approach and climb-out crosses occupied neighborhoods.

Area	Aircraft noise	Why
North Santa Clara (Rivermark)	✈︎✈︎✈︎	Directly under the Rwy 30 departure climb-out; complaint epicenter
Santa Clara (central, near SCU)	✈︎✈︎✈︎	West of the field under departures and south-flow circling
Downtown San Jose / SoFA	✈︎✈︎✈︎	Low north-flow arrivals descending to Rwy 30
Naglee Park	✈︎✈︎✈︎	On the extended approach centerline just before the threshold
Sunnyvale (north / Lakewood)	✈︎✈︎✈︎	South-flow arrivals at only 1,500–3,000 ft, plus departure track
Willow Glen	✈︎✈︎	South-flow departure corridor; quiet in the usual north flow
Alviso	✈︎✈︎	North of the field under the climbing departure fan
Berryessa	✈︎✈︎	Turning departures and some arrival traffic
Japantown / Hensley	✈︎✈︎	Adjacent to the field; lateral and ground noise
Rose Garden / Shasta-Hanchett	✈︎✈︎	South of the runways under departures and the GA avoid-area
Mountain View (north)	✈︎	Far end of the corridor near Moffett; higher altitude
Palo Alto	✈︎	Outer edge of south-flow arrivals only
Cupertino	✈︎	Largely off the main corridors
Cambrian Park	✈︎	South of the predominant north-flow tracks

If aircraft noise is your top concern, the practical move in the South Bay is to get off the north-west/south-east runway axis: Cupertino and Cambrian Park to the south-west and south sit largely clear of the main corridors, and Palo Alto only catches the outer edge of south-flow arrivals at altitude. The hardest-hit band is the north-flow departure corridor through north Santa Clara and into Sunnyvale, plus the low arrival path over downtown San Jose and Naglee Park. If you’re house-hunting in any of those, drop a pin on the map above to see your specific street.

Flight patterns and runway use

SJC switches direction with the wind, but the dominant setup is north flow, used roughly 80–90% of the time. In north flow, aircraft land toward the north-west on runways 30L/30R, so arrivals descend in over downtown San Jose and Willow Glen from the south-east, while departures climb out to the north-west directly over north Santa Clara and Sunnyvale toward Moffett Field. That departure climb-out is the single biggest source of community noise complaints — the jets are still low and at high power as they cross the residential grid north-west of the field.

When winds blow from the south — inclement weather, some mornings, frontal passages — the airport flips to south flow. For safety, aircraft take off and land into the wind, so now arrivals approach from the north-west over Sunnyvale, Mountain View and Palo Alto, circling west of the field before turning, while departures head south-east over Willow Glen toward the Coyote Valley. North Sunnyvale is the most affected of the south-flow arrival communities, overflown in a narrow swath at only 1,500–3,000 ft.

The airport’s noise-abatement program designates 12R/30L as the preferred jet arrival runway and 12L/30R as the preferred jet departure runway, and asks turbine departures to begin from the full length of the runway for extra climb altitude over neighborhoods. General-aviation procedures ask pilots to avoid the residential area between SR-87 and First Street, maintain at least 1,000 ft AGL (1,500 ft for multi-engine) in the pattern, schedule engine run-ups in daytime, and use SJC only as an initial-departure or final-arrival point at night rather than doing pattern work. There are no over-water procedures — the airport is entirely surrounded by urban San Jose.

The route-density layer on the map above shows the result: a bright corridor running north-west off the runway ends through Santa Clara and Sunnyvale, a low arrival band over downtown and Naglee Park, and a secondary south-east corridor over Willow Glen that lights up only when the airport is in south flow.

When is it quietest?

SJC’s mandatory noise-based curfew shapes the daily profile more than at most US airports:

Curfew (overnight): Louder Stage II aircraft are barred from 11:00 p.m. to 7:00 a.m.; quieter Stage III jets face a narrower 11:30 p.m. to 6:30 a.m. window. Overnight is the guaranteed quiet stretch — violations carry a $2,500 administrative penalty.
6:30 a.m. lift: Because most jets are Stage III, residents commonly report a surge of departures right at 6:30 a.m. as scheduled and delayed flights go almost at once. This is the most-complained-about moment of the day in north Santa Clara.
Morning (7 a.m. – 10 a.m.): Sustained departure bank in north flow, climbing out over Santa Clara and Sunnyvale.
Midday (10 a.m. – 4 p.m.): Moderate, steady traffic both directions.
Evening arrival bank (5 p.m. – 9 p.m.): Busy, with arrivals descending over downtown and Naglee Park in north flow.
Late evening (9 p.m. – 11:30 p.m.): Tapers as flights race to land before the curfew closes the window.

Wind shifts matter too. A southerly that develops will flip the airport to south flow, suddenly putting Sunnyvale, Mountain View and Palo Alto under low arrivals that were previously routing elsewhere — and giving downtown San Jose and Naglee Park a break from the arrival path. For your specific address, drop a pin on the map above to see the hourly profile.

How to check noise at your specific address

The map above answers “is this spot loud?” Three steps:

Search your address or postcode in the bar at the bottom of the map.
Drop a pin — click the location marker that appears.
Read the noise report in the sidebar: average daily noise (Leq), peak observed dB, flights per day passing within 2 km, and an hourly breakdown.

The Noise Heatmap layer (orange/red = louder) and the Route Density layer (purple/magenta = busier corridors) make the parallel-runway pattern obvious — the bright north-west corridor through Santa Clara and Sunnyvale, and the low arrival band over downtown. Most addresses well off that axis (Cupertino, Cambrian Park, much of the south and west) land in the green/quiet zone for daytime noise, and the curfew handles overnight on its own.

To report a specific event or a suspected curfew violation, contact the SJC Airport Noise Office at flysanjose.com/noise/noise-complaint or call 408-452-0707.

Frequently asked questions

Is San Jose airport loud, and which areas get the worst of it?: It depends heavily on where you are relative to the two parallel runways. SJC sits almost entirely inside the city — about 3 miles north-west of downtown with no buffer of open land or water — so noise lands on dense residential neighborhoods. The worst-affected areas are north Santa Clara (under the Rwy 30 departure climb-out, where residents have reported backyard levels near 90 dB), downtown San Jose and Naglee Park (under low arrivals), and north Sunnyvale (under low south-flow arrivals). Drop a pin on the map above to see your specific street.
What is the difference between north flow and south flow at SJC?: SJC's runways run north-west to south-east, and the airport switches direction with the wind. In north flow — by far the most common setup, roughly 80–90% of the time — aircraft land toward the north-west on Rwy 30, so arrivals descend over downtown San Jose and Willow Glen from the south-east while departures climb out to the north-west over north Santa Clara and Sunnyvale. In south flow (southerly winds, some mornings and frontal passages) it flips — arrivals come in over Sunnyvale, Mountain View and Palo Alto and circle west of the field, while departures head south-east over Willow Glen toward Coyote Valley.
Why do planes fly low over Santa Clara and Sunnyvale early in the morning?: Both sit on the airport's busiest corridors. North Santa Clara is directly under the Rwy 30 departure climb-out in the predominant north flow, so it catches jets accelerating off the runway at low altitude — the single biggest source of organized SJC complaints. North Sunnyvale is overflown by south-flow arrivals in a narrow swath at only 1,500–3,000 ft. The early-morning surge is the Stage III curfew lifting at 6:30 a.m., when delayed and scheduled departures go almost at once.
Which neighborhoods near San Jose airport are quietest?: Areas well off the north-west/south-east runway axis fare best: Cupertino and Cambrian Park to the south-west and south sit largely off the main corridors, and Palo Alto only catches the outer edge of south-flow arrivals at high altitude. Within the corridor, Willow Glen is relatively quiet during the predominant north flow and only gets busy during south-flow departures. Use the pin-drop map above to compare specific addresses.
How do I report aircraft noise at San Jose airport?: Contact the SJC Airport Noise Office at the Norman Y. Mineta San José International Airport. You can file a complaint online at flysanjose.com/noise/noise-complaint or call 408-452-0707. Logged complaints, including curfew-violation reports, feed into the airport's noise program and can be escalated to the Airport Commission.
Does the map cover all aircraft over San Jose?: Yes — the commercial jet fleet operating from SJC has near-complete ADS-B coverage, so the heatmap and route-density layers reflect actual traffic accurately. The main gaps are a small amount of general-aviation traffic, including light aircraft that use SJC and nearby fields like Reid-Hillview and Moffett, some of which may not be ADS-B-equipped.

Sources and further reading

Airport Noise Office — Noise Complaint — Norman Y. Mineta San José International Airport
SJC Curfew Information — Norman Y. Mineta San José International Airport
SJC North Flow vs. South Flow Q&A — Norman Y. Mineta San José International Airport
Noise Abatement Procedures — Norman Y. Mineta San José International Airport
San Jose International Airport — Wikipedia — Wikipedia
Santa Clarans Considering Moving Due to Airplane Noise — Silicon Valley Voice

Data updated 2026-10-08 — live ADS-B monitoring, rolling 30-day statistics (methodology). Article text revised 2026-06-12.

30 dB	Whisper
45 dB	Quiet residential
55 dB	Normal conversation
65 dB	Busy road
75 dB	Vacuum cleaner
85 dB	Heavy traffic
95 dB	Motorcycle nearby

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San Jose Flight Path Noise Map – Norman Y. Mineta San José International Airport (SJC)

Aircraft noise around San Jose in October 2026

Does San Jose Airport have a curfew?

Which neighborhoods are quietest — and which aren’t

Flight patterns and runway use

When is it quietest?

How to check noise at your specific address

Frequently asked questions

Sources and further reading

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