Yonaguni Airport

ROYN / OGN

Yonaguni, JP

Last Updated
Apr 22, 21:00Z

Current Weather

Display Units
Recent 51 min ago
21:00Z

🌙 Night
VFR
Flight Rules
26°C
Temperature
Dewpoint: 25°C
11 kt
190°
10+ km
Visibility
Ceiling
Unlimited
--
QNH
Altimeter Setting

Raw METAR

METAR ROYN 222100Z AUTO 19011KT 9999 FEW013 26/25 Q1005

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 70 ft
FEW 1,300 ft AGL
🌤️
FEW
Few (1/8-2/8 sky coverage)
1,300 ft
AGL (Above Ground)
1,370 ft AMSL

Weather Briefing

VFR

Yonaguni Airport is currently reporting visual flight rules (VFR) conditions with few clouds at 1,300 feet and 10 miles or greater visibility.

Wind Analysis

Winds are from the south (190°) at 11 knots. Runway 26 is favored with a 4-knot headwind and 10-knot crosswind component.

Visibility & Ceiling

Visibility is unrestricted. No ceiling exists. Cloud layers reported: few at 1,300 ft.

Temperature & Moisture

Temperature is 26°C (79°F) with a dewpoint of 25°C. The temperature-dewpoint spread is very narrow, indicating saturated or near-saturated air. Fog formation or low cloud development is likely.

Pilot Recommendations

Conditions are favorable for visual flight. 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.

24-Hour Weather Evolution

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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
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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
OYN
08
26 ✈️

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 08/26
Active: 26
4,920 ft 150 ft ASP 75°
3.8 kt 10.3 kt
70° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - ROYN

5,445 observations | Sep 2025 - Apr 2026

Flight Rules Distribution

VFR
65.8%
MVFR
24%
IFR
8.7%
LIFR
1.4%

Yonaguni Airport typically experiences VFR conditions 65.8% of the time, though instrument-rated pilots will find IFR weather present approximately 10.1% of observations. Prevailing winds are from the NE averaging 14.6 knots, with gusts recorded up to 46 knots. Temperatures typically range between 12°C and 34°C with an average of 22.9°C. The best months for VFR flying are September, November, January.

Wind Analysis

Prevailing Direction: NE (45°)
Average Speed: 14.6 kt
Maximum Recorded: 46 kt
Calm Winds: 0%
Direction Distribution:
N
22.8%
NE
29.4%
E
15.8%
SE
15.9%
S
13.4%
SW
1.2%
W
0.5%
NW
0.9%

Temperature Range

Average: 22.9°C
Range: 12°C to 34°C
12°C 34°C

Visibility

Average: 10 SM
Below 3 SM: 0%
Fog Frequency: 0.4%

Best Months for VFR

September November January

Runway Wind Analysis

Runway 08/26
Favorable wind: 100%
Avg crosswind: 10.6 kt

Statistics computed from 5,445 METAR observations (Sep 2025 - Apr 2026). Data sourced from official aviation weather services. Updated daily.

Yonaguni Airport - Airport Information

Airport Details

ICAO Code: ROYN
IATA Code: OGN
Type: medium airport
Status: active
Elevation: 70 ft MSL

Location

City: Yonaguni
Country: JP
Latitude: 24.467298°
Longitude: 122.979827°
Time Zone: Etc/GMT-8

Runway Information

Runway 08/26
Length: 4,920 ft
Width: 150 ft
Surface: ASP
ILS: No

About Yonaguni Airport

Overview

Yonaguni Airport serves the remote Yonaguni Island, located at the westernmost point of Japan. Situated at 70 feet above mean sea level, this medium-sized airport provides critical transportation infrastructure for the island's 1,700 residents and supports regional connectivity in the Ryukyu Islands.

Flying Conditions

Meteorological data indicates predominantly favorable visual flight conditions, with 68.3% of observations supporting VFR operations. Wind patterns are consistently from the northeast at an average of 15.4 knots, with September, November, and January presenting the most stable flying conditions. Temperature ranges from 12°C to 34°C, with an average of 23.7°C, offering generally mild operating environments.

Notable Features

The airport features a single 4,920-foot asphalted runway (08/26) positioned to maximize wind alignment. Its geographic location at 24.467298, 122.979827 places it in a maritime environment with potential for rapidly changing wind conditions, as evidenced by occasional wind gusts reaching up to 46 knots. Proximity to the ocean likely introduces complex local wind dynamics for pilots to anticipate.

Approach Considerations

Runway 08/26 demonstrates excellent wind compatibility, with 100% favorable wind conditions and an average crosswind of 11 knots. Pilots should expect consistent northeast winds and prepare for potential moderate crosswind components. The high percentage of VFR conditions (68.3%) suggests reliable visual approach opportunities throughout the year.

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.