Bayport, New York · field elev 39 ft
Density Altitude at Bayport Aerodrome (23N)
Bayport Aerodrome sits at 39 ft, and even a typical August afternoon (80 °F) only lifts density altitude to about 1,428 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 | 32.4 | −1,742 ft | 38.6 | −1,310 ft |
| February | 33.4 | −1,672 ft | 39.5 | −1,248 ft |
| March | 39.7 | −1,234 ft | 46.0 | −803 ft |
| April | 49.4 | −573 ft | 55.6 | −158 ft |
| May | 57.9 | −6 ft | 64.1 | 400 ft |
| June | 68.3 | 672 ft | 74.1 | 1,043 ft |
| July | 74.6 | 1,075 ft | 79.6 | 1,390 ft |
| August | 74.7 | 1,081 ft | 80.2 | 1,428 ft |
| September | 67.0 | 588 ft | 73.2 | 986 ft |
| October | 56.1 | −125 ft | 62.6 | 302 ft |
| November | 46.3 | −783 ft | 52.6 | −358 ft |
| December | 37.7 | −1,373 ft | 43.7 | −960 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 23N
DENSITY ALTITUDE
Field elevation 39 ft — the air behaves like 1,415 ft.
- PRESSURE ALT
- 40 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 New York fields
- KISP — Long Island Mac Arthur
New York · elev 99 ft
- KHWV — Brookhaven
Shirley · elev 81 ft
- KFRG — Republic
Farmingdale · elev 82 ft
- KFOK — Francis S Gabreski
Westhampton Beach · elev 66 ft
- 21N — Mattituck
Mattituck · elev 30 ft
- KJFK — John F Kennedy International
New York · elev 13 ft
- KHPN — Westchester County
White Plains · elev 439 ft
- KLGA — Laguardia
New York · elev 21 ft
Frequently asked questions
How high does density altitude get at 23N in summer?
On a typical August afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Bayport Aerodrome reaches roughly 1,428 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 23N on an average day?
It swings with the seasons: from roughly −1,742 ft at the coldest month's average temperature to about 1,081 ft at the warmest month's — all from a constant field elevation of 39 ft. The month-by-month table above carries the full year.
What is the field elevation of Bayport Aerodrome?
39 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 23N (FAA), in Bayport, New York.