Oakland, California · field elev 9 ft
Density Altitude at Oakland San Francisco Bay (KOAK)
Oakland San Francisco Bay sits at 9 ft, and even a typical September afternoon (74 °F) only lifts density altitude to about 1,006 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 49.9 | −577 ft | 57.7 | −56 ft |
| February | 52.5 | −402 ft | 60.3 | 115 ft |
| March | 55.1 | −229 ft | 63.1 | 298 ft |
| April | 57.4 | −76 ft | 65.6 | 461 ft |
| May | 59.9 | 89 ft | 67.9 | 609 ft |
| June | 62.7 | 272 ft | 71.4 | 834 ft |
| July | 63.9 | 350 ft | 71.6 | 847 ft |
| August | 64.6 | 396 ft | 72.4 | 898 ft |
| September | 64.8 | 409 ft | 74.1 | 1,006 ft |
| October | 61.4 | 187 ft | 71.5 | 840 ft |
| November | 54.8 | −249 ft | 63.9 | 350 ft |
| December | 50.1 | −563 ft | 57.9 | −43 ft |
▲ above 5,000 ft · ⚠ above 8,000 ft. These are planning references at standard pressure and dry air — afternoon humidity and low pressure both push the real number higher. Run today's values below.
Run today’s numbers for KOAK
DENSITY ALTITUDE
Field elevation 9 ft — the air behaves like 1,000 ft.
- PRESSURE ALT
- 10 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
- —
- AIR DENSITY
- —
- WATER · GRAINS/LB
- —
For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment
Nearby California fields
- KHWD — Hayward Exec
Hayward · elev 52 ft
- KSFO — San Francisco International
San Francisco · elev 13 ft
- KSQL — San Carlos
San Carlos · elev 6 ft
- KPAO — Palo Alto
Palo Alto · elev 7 ft
- KCCR — Buchanan Field
Concord · elev 26 ft
- KHAF — Half Moon Bay
Half Moon Bay · elev 66 ft
- KLVK — Livermore Municipal
Livermore · elev 400 ft
- KSJC — Norman Y Mineta San Jose International
San Jose · elev 62 ft
Frequently asked questions
How high does density altitude get at KOAK in summer?
On a typical September afternoon — around 74 °F at the nearest NOAA normals station — density altitude at Oakland San Francisco Bay reaches roughly 1,006 ft at standard pressure. Hotter-than-normal days, low pressure, and humidity all push it higher, so run the day's actual numbers before flying.
What is the density altitude at KOAK on an average day?
It swings with the seasons: from roughly −577 ft at the coldest month's average temperature to about 409 ft at the warmest month's — all from a constant field elevation of 9 ft. The month-by-month table above carries the full year.
What is the field elevation of Oakland San Francisco Bay?
9 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOAK (ICAO) / OAK (FAA), in Oakland, California.