Stevensville, Maryland · field elev 15 ft
Density Altitude at Bay Bridge (W29)
Bay Bridge sits at 15 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 1,846 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 | 35.4 | −1,562 ft | 42.1 | −1,099 ft |
| February | 36.9 | −1,458 ft | 44.2 | −955 ft |
| March | 43.9 | −976 ft | 51.9 | −435 ft |
| April | 54.9 | −235 ft | 63.9 | 357 ft |
| May | 64.5 | 397 ft | 73.4 | 969 ft |
| June | 74.7 | 1,052 ft | 83.1 | 1,580 ft |
| July | 79.5 | 1,355 ft | 87.4 | 1,846 ft |
| August | 77.4 | 1,222 ft | 85.4 | 1,722 ft |
| September | 70.6 | 790 ft | 78.2 | 1,273 ft |
| October | 59.1 | 43 ft | 67.5 | 591 ft |
| November | 48.3 | −677 ft | 55.6 | −188 ft |
| December | 39.7 | −1,264 ft | 45.7 | −853 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 W29
DENSITY ALTITUDE
Field elevation 15 ft — the air behaves like 1,821 ft.
- PRESSURE ALT
- 16 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 Maryland fields
- 3W3 — Kentmorr Airpark
Stevensville · elev 10 ft
- KANP — Lee
Annapolis · elev 34 ft
- KESN — Easton/Newnam Field
Easton · elev 72 ft
- W48 — Essex Skypark
Baltimore · elev 14 ft
- KBWI — Baltimore/Washington International Thurgood Marshall
Baltimore · elev 143 ft
- W00 — Freeway
Bowie · elev 168 ft
- KFME — Fort Meade Exec
Fort Meade (Odenton) · elev 150 ft
- KMTN — Martin State
Baltimore · elev 22 ft
Frequently asked questions
How high does density altitude get at W29 in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Bay Bridge reaches roughly 1,846 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 W29 on an average day?
It swings with the seasons: from roughly −1,562 ft at the coldest month's average temperature to about 1,355 ft at the warmest month's — all from a constant field elevation of 15 ft. The month-by-month table above carries the full year.
What is the field elevation of Bay Bridge?
15 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is W29 (FAA), in Stevensville, Maryland.