Nantucket Memorial Airport

KACK / ACK

Nantucket, US

Last Updated
Mar 5, 06:19Z

Current Weather

Display Units
Fresh 14 min ago
06:19Z

☀️ Day
VFR
Flight Rules
-1°C
Temperature
Dewpoint: -1°C
3 kt
250°
--
Visibility
Ceiling
Unlimited
1024 hPa
QNH
Altimeter Setting

Raw METAR

SPECI KACK 050619Z AUTO 25003KT 1 3/4SM BR CLR M01/M01 A3024 RMK AO2 I1001 T10111011
QNH
1024 hPa
Sea Level Pressure
For altitude above MSL
QFE
1022 hPa
Field Pressure
Height above aerodrome (47 ft)
Pressure Alt
-276 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: -2,185 ft
ISA Deviation: -15.9°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF KACK 050520Z 0506/0606 22004KT 1/2SM FZFG OVC003 TEMPO 0506/0510 1/4SM FZFG FM051500 07008KT 1SM BR OVC003 FM051800 06011KT 1SM -RA BR OVC003 FM060500 08017G25KT 2SM -RA BR OVC003
Upcoming Changes (Next 12 Hours)
06:33Z BASE
+0h
LIFR 220° 4 kt
Visibility: 1/2SM
Ceiling: 300 ft
Freezing Fog
15:00Z FM051500
+9h
LIFR 70° 8 kt
Visibility: 1SM
Ceiling: 300 ft
Mist
18:00Z FM051800
+12h
LIFR 60° 11 kt
Visibility: 1SM
Ceiling: 300 ft
Light Rain, Mist

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
ACK
06
24 ✈️
12
30
15
33

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 06/24
Active: 24
6,303 ft 150 ft ASP 44°
3.0 kt 0.5 kt
10° angle
12/30 2,696 ft 50 ft ASP 107°
2.4 kt 1.8 kt
143° angle
15/33 4,000 ft 100 ft ASP 135°
1.3 kt 2.7 kt
115° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KACK

4,953 observations | Sep 2025 - Mar 2026

Flight Rules Distribution

VFR
70.2%
MVFR
15%
IFR
9.1%
LIFR
5.7%

Nantucket Memorial Airport typically experiences VFR conditions 70.2% of the time, though instrument-rated pilots will find IFR weather present approximately 14.8% of observations. Prevailing winds are from the W averaging 12.1 knots, with gusts recorded up to 48 knots. Temperature extremes range from -13°C to 26°C, reflecting significant seasonal variation. The best months for VFR flying are November, October, September.

Wind Analysis

Prevailing Direction: W (270°)
Average Speed: 12.1 kt
Maximum Recorded: 48 kt
Calm Winds: 3.1%
Direction Distribution:
N
15.8%
NE
10.2%
E
8.4%
SE
4.6%
S
8.6%
SW
11.8%
W
21.1%
NW
16.5%

Temperature Range

Average: 5.7°C
Range: -13°C to 26°C
-13°C 26°C

Visibility

Average: 9 SM
Below 3 SM: 3.7%
Fog Frequency: 4.6%

Best Months for VFR

November October September

Runway Wind Analysis

Runway 06/24
Favorable wind: 100%
Avg crosswind: 7.6 kt
Runway 12/30
Favorable wind: 100%
Avg crosswind: 7.6 kt
Runway 15/33
Favorable wind: 100%
Avg crosswind: 7.7 kt

Statistics computed from 4,953 METAR observations (Sep 2025 - Mar 2026). Data sourced from official aviation weather services. Updated daily.

Nantucket Memorial Airport - Airport Information

Airport Details

ICAO Code: KACK
IATA Code: ACK
Type: medium airport
Status: active
Elevation: 47 ft MSL

Location

City: Nantucket
Country: US
Latitude: 41.253101°
Longitude: -70.060204°
Time Zone: Etc/GMT+5

Runway Information

Runway 06/24
Length: 6,303 ft
Width: 150 ft
Surface: ASP
ILS: No
Runway 12/30
Length: 2,696 ft
Width: 50 ft
Surface: ASP
ILS: No
Runway 15/33
Length: 4,000 ft
Width: 100 ft
Surface: ASP
ILS: No

About Nantucket Memorial Airport

Overview

Nantucket Memorial Airport serves as the primary aviation gateway to Nantucket Island, located off the coast of Massachusetts. As a medium-sized airport with three runways, it supports commercial, private, and seasonal aviation traffic. The airport's elevation of 47 feet MSL reflects its coastal island environment.

Flying Conditions

Weather at Nantucket Memorial Airport demonstrates significant variability, with Visual Flight Rules (VFR) conditions predominating at 71.7% of observations. Prevailing westerly winds averaging 12 knots and temperatures ranging from -9°C to 26°C create diverse flying conditions. October, November, and September offer the most consistently favorable VFR weather, with minimal precipitation and stable atmospheric conditions.

Notable Features

The airport features three asphalt runways with lengths ranging from 2,696 to 6,303 feet, providing flexibility for different aircraft types. All three runways demonstrate 100% favorable wind alignment, with modest average crosswind components between 7.3 and 7.9 knots. The coastal location influences local meteorological patterns, with occasional fog events occurring in 4.3% of observations.

Approach Considerations

Pilots should anticipate potential reduced visibility scenarios, as 3.1% of observations report visibility below 3 statute miles. The longest runway (06/24 at 6,303 feet) offers the most comprehensive approach options. Wind data suggests westerly approaches are typically most favorable, with calm conditions present in 3.3% of observations. Standard maritime coastal approach considerations should be employed, accounting for potential wind shear and rapidly changing conditions.

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.