WxDecoder

77MD Weather National Harbor Heliport

Oxon Hill, MarylandElevation 50 ftHeliport
OFF-FIELD REFERENCE
Nearest report: KDCA · 4 NM N · 41 min old
No ceiling, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KDCA
WIND
190@5
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

No aviation METAR is published for this airport. The nearest National Weather Service station reports wind from 130° at 4 kt, visibility 10 SM, temperature 15C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight clear, low near 45F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Tonight Clear 45 S 2 kt – 0%
Monday Patchy Fog then Sunny 71/50 W 4 kt – 0%
Tuesday Sunny 70/49 N 5 kt – 0%
Wednesday Partly Sunny 68/50 E 5 kt – 0%
Thursday Mostly Sunny 73/51 S 4 kt – 0%
Friday Sunny 77/53 W 3 kt – 0%
Saturday Mostly Sunny 74/56 E 5 kt – 4%
Sunday Mostly Cloudy then Chance Rain Showers 72 S 7 kt – 29%

Source: National Weather Service (office LWX). Forecast issued 2332Z.

Radar

Radar data: NOAA/NWS MRMS composite reflectivity. For situational awareness only, not a substitute for an official weather briefing.

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RUNWAYS & WIND
Crosswind calculator
No runway layout is available for 77MD. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 60 ft

H1
Dimensions
60 x 60 ft
Surface
Concrete
Edge lights
PERI
RWY H1

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

FIELD CONDITIONS

Field elevation

Field elevation
50 ft MSL

Density and pressure altitude need a current temperature and altimeter from the METAR.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2216Z 6:16 PM
Sunrise
1128Z 7:28 AM
Loggable night
2243Z (6:43 PM local) → 1101Z (7:01 AM local)
end of evening to start of morning civil twilight
Position lights required
2216Z (6:16 PM local) → 1128Z (7:28 AM local)
sunset to sunrise (91.209)
Night passenger currency
2316Z (7:16 PM local) → 1028Z (6:28 AM local)
1 hr after sunset to 1 hr before sunrise (61.57(b))

FAA definitions, shown in Zulu with airport-local time. Verify for your operation.

AIRPORT INFORMATION

Facility & services

National Harbor Heliport is in Oxon Hill, Maryland. Field elevation 50 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeHeliport
ManagerPRINCE GEORGES COUNTY POLICE DEPT
Manager phone443-223-8353
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATA77MD
SectionalWASHINGTON
Center (ARTCC)WASHINGTON
Flight service (AFSS)LEESBURG
RegionMaryland
CountryUnited States
Coordinates38.7937, -77.0121
Distance from city1 NM WSW
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

77MD traffic patterns

2026-06-14 to 2026-10-23, 9 days observed · data 2026-10-23

Low confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
1
AVG OPS/DAY
2
Activity trend over 4 days: flat, from 2 to 2 operations per dayOperations trend (4 days)

Busiest day: Thu · Busiest month: Oct

FLEET MIX
Helicopter 69%Airliner 31%

Mostly rotorcraft.

TOP AIRCRAFT TYPES
›AS65 (Helicopter) · ~2 landings/mo
›B412 (Helicopter) · ~1 landings/mo
›CRJ9 (Airliner) · ~1 landings/mo
›E170 (Airliner) · ~1 landings/mo
›EC45 (Helicopter) · ~1 landings/mo
Data limitations (4)
›ADS-B coverage is incomplete; counts are an observed lower bound, not official totals.
›Some aircraft do not transmit usable ADS-B and are not counted.
›Aircraft types and based estimates are inferred and may be wrong.
›This is not official ATC, FAA, or airport data.
NEARBY AIRPORTS

Weather reference stations

77MD has no on-field report. Nearest reporting station: KDCA (4 NM N, VFR).

KDCA Ronald Reagan Washington National Airport
4 NM N
VFR
KADW Joint Base Andrews
7 NM E
VFR
KDAA Davison Army Air Field
9 NM SW
VFR
KCGS College Park Airport
12 NM N
VFR
KFME Fort Meade Executive Airport
21 NM NE
VFR
KNYG Quantico Marine Corps Airfield / Turner Field
22 NM SW
UNKNOWN
AIRPORT REMARKS

Operational remarks

›FOR CD CTC WASHINGTON ARTCC AT 703-771-3587.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗77MD on OurAirports
FREQUENTLY ASKED
Does 77MD have a METAR?
No on-field METAR is issued for 77MD. This page uses the nearest reporting station as a reference.
Does 77MD have a TAF?
No TAF is issued directly for 77MD. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 77MD?
77MD sits at 50 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 77MD?
No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.
This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.