Long Island Mac Arthur Airport

KISP / ISP

Islip, US

Last Updated
Jun 10, 13:56Z

Current Weather

Display Units
Recent 43 min ago
13:56Z

☀️ Day
VFR
Flight Rules
21°C
Temperature
Dewpoint: 16°C
8 kt
200°
10 SM
Visibility
11,000 ft
Ceiling
Above Ground Level
1015 hPa
QNH
Altimeter Setting

Raw METAR

METAR KISP 101356Z 20008KT 10SM BKN110 BKN140 BKN250 21/16 A2997 RMK AO2 SLP148 T02060156

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 99 ft
BKN 11,000 ft AGL
BKN 14,000 ft AGL
BKN 25,000 ft AGL
☁️
BKN
Broken (5/8-7/8 sky coverage)
11,000 ft
AGL (Above Ground)
11,099 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
14,000 ft
AGL (Above Ground)
14,099 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
25,000 ft
AGL (Above Ground)
25,099 ft AMSL

Weather Briefing

VFR

Long Island Mac Arthur Airport is currently reporting visual flight rules (VFR) conditions with broken clouds at 11,000 feet and 10 SM visibility.

Wind Analysis

Winds are from the south-southwest (200°) at 8 knots. Runway 24 is favored with a 6-knot headwind and 5-knot crosswind component.

Visibility & Ceiling

Visibility is 10 SM. The ceiling is 11000 feet AGL (broken), well above standard VFR minimums.

Temperature & Moisture

Temperature is 21°C (70°F) with a dewpoint of 16°C, indicating moderate moisture conditions.

Forecast Outlook

The TAF forecast covers the next 24 hours. The forecast shows a transition between VFR and IFR conditions. Pilots should monitor the forecast closely and have an alternate airport plan. Expected weather includes: Light Showers Rain. There is a 30% probability of MVFR conditions with Light Showers Rain between 21:00Z and 00:00Z. There is a 30% probability of IFR conditions with Light Showers Rain between 00:00Z and 06:00Z.

Pilot Recommendations

Conditions are favorable for visual flight. The forecast indicates conditions may deteriorate. Ensure you have fuel reserves and a viable alternate airport.

This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.

QNH
1015 hPa
Sea Level Pressure
For altitude above MSL
QFE
1012 hPa
Field Pressure
Height above aerodrome (99 ft)
Pressure Alt
47 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 791 ft
ISA Deviation: +6.2°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF KISP 101132Z 1012/1112 22008KT P6SM SCT200 FM101400 20007KT P6SM VCSH SCT050 BKN100 FM101800 18010KT P6SM BKN035 BKN100 PROB30 1021/1024 6SM -SHRA BKN025 FM110000 21010KT P6SM VCSH SCT009 BKN015 PROB30 1100/1106 4SM -SHRA BKN009 FM110600 21010KT P6SM FEW004 BKN008
Upcoming Changes (Next 12 Hours)
14:39Z BASE
+0h
VFR 220° 8 kt
Visibility: >6SM
18:00Z FM101800
+4h
VFR 180° 10 kt
Visibility: >6SM
Ceiling: 3,500 ft
21:00Z PROB30
+7h
MVFR
Visibility: 6SM
Ceiling: 2,500 ft
Light Showers Rain
00:00Z FM110000
+10h
MVFR 210° 10 kt
Visibility: >6SM
Ceiling: 1,500 ft

24-Hour Weather Evolution

Loading weather data...
Data Sources
  • • Current conditions from METAR observations
  • • Historical data from past 24 hours
  • • No forecast or predicted data included
  • • Data updated with each new METAR report
Chart Features
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Note: Future values beyond current TAF validity are estimates based on climatological data and trends. Always verify with current forecasts before flight operations.

Airport Runway Layout

N
ISP
06
24 ✈️
10
28
15L
33R
15R
33L

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 06/24
Active: 24
7,006 ft 150 ft ASP 45°
6.1 kt 5.1 kt
40° angle
10/28 5,034 ft 150 ft ASP 90°
2.7 kt 7.5 kt
110° angle
15L/33R 3,175 ft 75 ft ASP 135°
3.4 kt 7.3 kt
65° angle
15R/33L 5,186 ft 150 ft ASP 135°
3.4 kt 7.3 kt
65° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KISP

6,678 observations | Sep 2025 - Jun 2026

Flight Rules Distribution

VFR
80.7%
MVFR
8.7%
IFR
6.3%
LIFR
4.3%

Long Island Mac Arthur Airport enjoys predominantly VFR conditions, with visual flight rules prevailing 80.7% of the time. Prevailing winds are from the W averaging 9.5 knots, with gusts recorded up to 33 knots. Calm conditions occur 10.4% of the time. Temperature extremes range from -16°C to 33°C, reflecting significant seasonal variation. The best months for VFR flying are June, May, December.

Wind Analysis

Prevailing Direction: W (270°)
Average Speed: 9.5 kt
Maximum Recorded: 33 kt
Calm Winds: 10.4%
Direction Distribution:
E
6.4%
N
13.5%
S
11.8%
W
15.8%
NE
7.7%
NW
14.5%
SE
4.1%
SW
15.8%

Temperature Range

Average: 7.9°C
Range: -16°C to 33°C
-16°C 33°C

Visibility

Average: 9.3 SM
Below 3 SM: 2.5%
Fog Frequency: 3.1%

Best Months for VFR

June May December

Runway Wind Analysis

Runway 06/24
Favorable wind: 100%
Avg crosswind: 6.3 kt
Runway 10/28
Favorable wind: 100%
Avg crosswind: 6.2 kt
Runway 15L/33R
Favorable wind: 100%
Avg crosswind: 5.9 kt
Runway 15R/33L
Favorable wind: 100%
Avg crosswind: 5.9 kt

Statistics computed from 6,678 METAR observations (Sep 2025 - Jun 2026). Data sourced from official aviation weather services. Updated daily.

Long Island Mac Arthur Airport - Airport Information

Airport Details

ICAO Code: KISP
IATA Code: ISP
Type: medium airport
Status: active
Elevation: 99 ft MSL

Location

City: Islip
Country: US
Latitude: 40.795200°
Longitude: -73.100197°
Time Zone: Etc/GMT+5

Runway Information

Runway 06/24
Length: 7,006 ft
Width: 150 ft
Surface: ASP
ILS: No
Runway 10/28
Length: 5,034 ft
Width: 150 ft
Surface: ASP
ILS: No
Runway 15L/33R
Length: 3,175 ft
Width: 75 ft
Surface: ASP
ILS: No
Runway 15R/33L
Length: 5,186 ft
Width: 150 ft
Surface: ASP
ILS: No

About Long Island Mac Arthur Airport

Overview

Long Island MacArthur Airport serves Suffolk County in New York, providing a critical transportation hub for Long Island's eastern regions. Located at 99 feet MSL with coordinates 40.795200, -73.100197, the airport offers four asphalt runways supporting various aviation operations. As a medium-sized airport, it provides essential infrastructure for general aviation, commercial, and regional aircraft.

Flying Conditions

Weather observations indicate predominantly favorable flying conditions, with 82.8% of recorded METARs reporting VFR conditions. Prevailing westerly winds at an average of 9.6 knots create stable approach environments. Temperature ranges from -11°C to 29°C suggest significant seasonal variation, with December, September, and November presenting the most consistently favorable VFR weather conditions.

Notable Features

The airport features four runways with substantial length variations: 06/24 at 7,006 feet, 10/28 at 5,034 feet, and two parallel runways 15L/33R and 15R/33L at 3,175 and 5,186 feet respectively. All runways demonstrate 100% favorable wind alignment, with modest average crosswind components ranging between 5.5 and 6.4 knots. This configuration provides pilots multiple landing options under varying wind conditions.

Approach Considerations

Wind data suggests a consistent westerly wind pattern, which typically favors runways oriented west-east and north-south. Visibility averages 9.4 statute miles, with only 2.2% of observations showing conditions below 3 miles and minimal fog occurrence at 1.2%. Pilots should anticipate generally stable approach conditions with multiple runway options for safe landing.

Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.

Official Data Sources

Weather NOAA Aviation Weather Center • International METAR/TAF Network
Airports OurAirports.com • Public domain airport database
NOTAMs FAA NOTAM System • ICAO NOTAM Distribution
Last updated: Jan 1, 1970 12:00 AM UTC

Disclaimer: Data is provided for informational purposes only. Pilots must verify all information through official sources before flight operations. Weather conditions change rapidly; always obtain a current briefing from approved weather services.