WxDecoder

NK41 Weather Mather Hospital Heliport

Port Jefferson, New YorkElevation 206 ftHeliport
OFF-FIELD REFERENCE
Nearest report: KISP · 9 NM S · 17 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 · KISP
WIND
330@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 340° at 4 kt, visibility 10 SM, temperature 9.4C. This observation is older than usual, so treat it with extra caution. Treat this as supplemental, not an aviation observation. Forecast suggests today sunny, high near 62F, low near 43F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Today Sunny 62/43 W 3 kt – 0%
Monday Sunny 64/49 W 6 kt – 0%
Tuesday Sunny 56/43 NE 10 kt – 0%
Wednesday Mostly Sunny 55/47 E 6 kt – 0%
Thursday Mostly Sunny 64/53 SW 9 kt – 1%
Friday Sunny 67/52 W 5 kt – 1%
Saturday Mostly Sunny 64/52 E 5 kt – 6%

Source: National Weather Service (office OKX). Forecast issued 1412Z.

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 NK41. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 110 ft

H1
Dimensions
43 x 43 ft
Surface
Concrete
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
206 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2157Z 5:57 PM
Sunrise
1115Z 7:15 AM
Loggable night
2225Z (6:25 PM local) → 1047Z (6:47 AM local)
end of evening to start of morning civil twilight
Position lights required
2157Z (5:57 PM local) → 1115Z (7:15 AM local)
sunset to sunrise (91.209)
Night passenger currency
2257Z (6:57 PM local) → 1015Z (6:15 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

Mather Hospital Heliport is in Port Jefferson, New York. Field elevation 206 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeHeliport
ManagerNORTHWELL HEALTH
Manager phone631-414-1489
CHARTS & AIRSPACE
ICAO / IATANK41
SectionalNEW YORK
Center (ARTCC)BOSTON
Flight service (AFSS)NEW YORK
RegionNew York
CountryUnited States
Coordinates40.9404, -73.0532
Distance from city1 NM ESE
SERVICES & LIGHTING
Control towerNon-towered
CTAF122.900
FREQUENCIES

Communications

122.900
CTAF
CTAF

Not all tower/ground/approach frequencies are in our datasets. Verify with the FAA Chart Supplement.

AIRCRAFT ACTIVITY

NK41 traffic patterns

2026-10-04 to 2026-10-04, 1 days observed · data 2026-10-23

Low confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
0
AVG OPS/DAY
1
Operations trend (1 days)

Busiest day: Sun · Busiest month: Oct

FLEET MIX

Mostly rotorcraft.

TOP AIRCRAFT TYPES
›R44 (Helicopter) · ~0 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

NK41 has no on-field report. Nearest reporting station: KISP (9 NM S, VFR).

KISP Long Island MacArthur Airport
9 NM S
VFR
KHWV Brookhaven Calabro Airport
11 NM SE
VFR
KBDR Igor I Sikorsky Memorial Airport
14 NM N
VFR
KFOK Francis S Gabreski Airport
20 NM E
VFR
KHVN Tweed New Haven Airport
21 NM N
VFR
KFRG Republic Airport
21 NM SW
VFR
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗NK41 on OurAirports
FREQUENTLY ASKED
Does NK41 have a METAR?
No on-field METAR is issued for NK41. This page uses the nearest reporting station as a reference.
Does NK41 have a TAF?
No TAF is issued directly for NK41. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at NK41?
NK41 sits at 206 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for NK41?
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.