North Island Naval Air Station-Halsey Field

KNZY / NZY

San Diego, US

Last Updated
Apr 21, 12:59Z

Military Airport

Restricted

This is a U.S. military installation. Civil aircraft operations are generally prohibited without prior authorization.

Access Notes:

Most military airfields closed to civil traffic; some joint-use exceptions exist

Consult official AIP (FAA AIP GEN 3.3) for current access procedures and restrictions.

Current Weather

Display Units
Fresh 20 min ago
12:59Z

☀️ Day
MVFR
Flight Rules
15°C
Temperature
Dewpoint: 12°C
4 kt
310°
10 SM
Visibility
2,500 ft
Ceiling
Above Ground Level
1017 hPa
QNH
Altimeter Setting

Raw METAR

SPECI KNZY 211259Z 31004KT 10SM BKN025 15/12 A3002 RMK AO2 T01500122

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 26 ft
BKN 2,500 ft AGL
☁️
BKN
Broken (5/8-7/8 sky coverage)
2,500 ft
AGL (Above Ground)
2,526 ft AMSL

Weather Briefing

MVFR

North Island Naval Air Station-Halsey Field is currently reporting marginal VFR (MVFR) conditions with broken clouds at 2,500 feet and 10 SM visibility.

Wind Analysis

Winds are from the northwest (310°) at 4 knots.

Visibility & Ceiling

Visibility is 10 SM. The ceiling is 2500 feet AGL (broken), placing conditions in the MVFR category.

Temperature & Moisture

Temperature is 15°C (59°F) with a dewpoint of 12°C. The narrow temperature-dewpoint spread suggests high humidity and potential for visibility restrictions, especially during cooling periods.

Forecast Outlook

The TAF forecast covers the next 24 hours. Conditions are expected to fluctuate between VFR and MVFR. VFR pilots should be prepared for deteriorating conditions. Expected weather includes: Light Showers Rain. Temporary MVFR conditions are forecast between 13:00Z and 18:00Z.

Pilot Recommendations

VFR pilots should exercise caution. Consider filing IFR if instrument rated, or postponing the flight if conditions are expected to deteriorate further. The narrow temperature-dewpoint spread creates risk of fog formation, particularly during evening and early morning hours.

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

QNH
1017 hPa
Sea Level Pressure
For altitude above MSL
QFE
1016 hPa
Field Pressure
Height above aerodrome (26 ft)
Pressure Alt
-87 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: -81 ft
ISA Deviation: +0.1°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF KNZY 210700Z 2107/2207 VRB06KT 9999 FEW020 BKN130 QNH2998INS FM211000 VRB06KT 9999 SCT010 QNH2998INS TEMPO 2113/2118 SCT010 BKN020 BECMG 2120/2122 25010KT 9999 FEW015 QNH2999INS BECMG 2202/2204 29009KT 8000 -SHRA BKN015 BKN050 QNH3001INS TX21/2122Z TN14/2113Z FS30216
Upcoming Changes (Next 12 Hours)
13:18Z BASE
+0h
VFR VRB 6 kt
Visibility: 10+ km
Ceiling: 13,000 ft
20:00Z BECMG
+7h
VFR 250° 10 kt
Visibility: 10+ km

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
  • • Hover for exact values and timestamps
  • • Click legend items to toggle data series
  • • Zoom and pan for detailed analysis
  • • Units automatically converted to preferences
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
NZY
11
29 ✈️
18
36

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 11/29
Active: 29
7,500 ft 300 ft PEM 122°
3.8 kt 1.4 kt
20° angle
18/36 8,000 ft 200 ft PEM 195°
1.7 kt 3.6 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 - KNZY

8,792 observations | Sep 2025 - Apr 2026

Flight Rules Distribution

VFR
72.5%
MVFR
17.8%
IFR
6.3%
LIFR
3.4%

North Island Naval Air Station-Halsey Field typically experiences VFR conditions 72.5% of the time, though instrument-rated pilots will find IFR weather present approximately 9.7% of observations. Prevailing winds are from the NW averaging 6.5 knots. Calm conditions occur 22.6% of the time. Temperatures typically range between 7°C and 34°C with an average of 16.8°C. The best months for VFR flying are February, April, March.

Wind Analysis

Prevailing Direction: NW (315°)
Average Speed: 6.5 kt
Maximum Recorded: 30 kt
Calm Winds: 22.6%
Direction Distribution:
N
12.8%
NE
3.3%
E
6.2%
SE
5.3%
S
11.8%
SW
4.8%
W
12.7%
NW
20.6%

Temperature Range

Average: 16.8°C
Range: 7°C to 34°C
7°C 34°C

Visibility

Average: 8.9 SM
Below 3 SM: 1.8%
Fog Frequency: 3.1%

Best Months for VFR

February April March

Runway Wind Analysis

Runway 11/29
Favorable wind: 100%
Avg crosswind: 3.7 kt
Runway 18/36
Favorable wind: 100%
Avg crosswind: 4 kt

Statistics computed from 8,792 METAR observations (Sep 2025 - Apr 2026). Data sourced from official aviation weather services. Updated daily.

North Island Naval Air Station-Halsey Field - Airport Information

Airport Details

ICAO Code: KNZY
IATA Code: NZY
Type: medium airport
Status: active
Elevation: 26 ft MSL

Location

City: San Diego
Country: US
Latitude: 32.699200°
Longitude: -117.214996°
Time Zone: Etc/GMT+8

Runway Information

Runway 11/29
Length: 7,500 ft
Width: 300 ft
Surface: PEM
ILS: No
Runway 18/36
Length: 8,000 ft
Width: 200 ft
Surface: PEM
ILS: No

About North Island Naval Air Station-Halsey Field

North Island Naval Air Station-Halsey Field is a military facility. Civilian access may be restricted or require Prior Permission (PPR). Pilots should consult the US AIP for current access procedures and restrictions.

Overview

North Island Naval Air Station-Halsey Field is a medium-sized airport located in San Diego, California, serving naval aviation operations. Situated at 26 feet above mean sea level, the base is strategically positioned on the western edge of the continental United States. The airport features two substantial runways capable of supporting various military and potential civilian aircraft operations.

Flying Conditions

Weather conditions at KNZY are predominantly favorable for flying, with Visual Flight Rules (VFR) conditions present 65.9% of the time. Pilots can expect northwest winds averaging 6.4 knots, with occasional stronger gusts up to 30 knots. Temperature ranges from 7°C to 34°C, with best VFR conditions typically occurring in October, November, and January.

Notable Features

Both runways (11/29 and 18/36) offer excellent wind alignment, with 100% favorable wind coverage and minimal average crosswind conditions (3.7-3.8 knots). The airport's proximity to the Pacific Ocean influences its microclimate, with occasional fog events affecting 4% of observations and visibility dropping below 3 statute miles in 2.6% of recorded conditions.

Approach Considerations

Runway selection should consider the prevailing northwest winds, which dominate the local wind pattern. Both 7,500-foot (11/29) and 8,000-foot (18/36) runways provide substantial landing options with consistent wind characteristics. Pilots should be prepared for potential marine layer influences and verify current weather conditions before approach, given the airport's coastal location.

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.