Marathon Airport

CYSP / YSP

Marathon, CA

Last Updated
Mar 4, 22:00Z

Current Weather

Display Units
Aging 1 hour ago
22:00Z

🌙 Night
MVFR
Flight Rules
-10°C
Temperature
Dewpoint: -12°C
12 kt
60° G20 kt
4 SM
Visibility
2,300 ft
Ceiling
Above Ground Level
1022 hPa
QNH
Altimeter Setting

Raw METAR

METAR CYSP 042200Z 06012G20KT 4SM -SN DRSN OVC023 M10/M12 A3018 RMK SC8 ICE ON INDICATOR LAST STFD OBS/NEXT 051300Z SLP245

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 1,035 ft
OVC 2,300 ft AGL
☁️
OVC
Overcast (8/8 sky coverage)
2,300 ft
AGL (Above Ground)
3,335 ft AMSL
QNH
1022 hPa
Sea Level Pressure
For altitude above MSL
QFE
988 hPa
Field Pressure
Height above aerodrome (1,035 ft)
Pressure Alt
773 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: -1,979 ft
ISA Deviation: -22.9°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF AMD CYSP 042108Z 0421/0422 05008G18KT P6SM -SN SCT012 OVC025 TEMPO 0421/0422 4SM -FZDZ OVC012 RMK NXT FCST BY 051500Z
Upcoming Changes (Next 12 Hours)
23:03Z BASE
+0h
MVFR 50° 8 kt
Visibility: >6SM
Ceiling: 2,500 ft
Light Snow

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
YSP
16
34 ✈️

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 16/34
Active: 34
3,933 ft 100 ft ASP 153°
2.1 kt 11.8 kt
80° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - CYSP

1,575 observations | Sep 2025 - Mar 2026

Flight Rules Distribution

VFR
57.8%
MVFR
22.9%
IFR
12.3%
LIFR
7%

Marathon Airport is frequently affected by reduced visibility conditions, with VFR weather only 57.8% of the time and IFR/LIFR conditions occurring in 19.3% of observations. Prevailing winds are from the N averaging 7.4 knots. Temperature extremes range from -34°C to 22°C, reflecting significant seasonal variation. Fog is a notable factor, occurring in approximately 12.3% of observations, with visibility below 3 SM in 4.3% of reports. The best months for VFR flying are September, October, November.

Wind Analysis

Prevailing Direction: N (0°)
Average Speed: 7.4 kt
Maximum Recorded: 25 kt
Calm Winds: 4.9%
Direction Distribution:
N
22.6%
NE
14.8%
E
8%
SE
8.2%
S
15.2%
SW
5.5%
W
9.2%
NW
11.6%

Temperature Range

Average: -2.5°C
Range: -34°C to 22°C
-34°C 22°C

Visibility

Average: 11.7 SM
Below 3 SM: 4.3%
Fog Frequency: 12.3%

Best Months for VFR

September October November

Runway Wind Analysis

Runway 16/34
Favorable wind: 100%
Avg crosswind: 4 kt

Statistics computed from 1,575 METAR observations (Sep 2025 - Mar 2026). Data sourced from official aviation weather services. Updated daily.

Marathon Airport - Airport Information

Airport Details

ICAO Code: CYSP
IATA Code: YSP
Type: medium airport
Status: active
Elevation: 1,035 ft MSL

Location

City: Marathon
Country: CA
Latitude: 48.755299°
Longitude: -86.344398°
Time Zone: Etc/GMT+6

Runway Information

Runway 16/34
Length: 3,933 ft
Width: 100 ft
Surface: ASP
ILS: No

About Marathon Airport

Overview

Marathon Airport serves the remote northwestern Ontario region near the Manitoba border. Located at an elevation of 1035 ft MSL, this medium airport provides critical transportation infrastructure in a sparsely populated area. The airport supports regional connectivity and potentially serves resource exploration, medical transport, and local aviation needs.

Flying Conditions

Weather at Marathon Airport demonstrates significant variability, with visual flight rules (VFR) conditions predominating at 57% of observations. Temperature ranges extensively from -34°C to 22°C, creating challenging seasonal transitions. Winter months introduce more frequent instrument meteorological conditions, with IFR and LIFR conditions combining for nearly 20% of observations.

Notable Features

The single asphalt runway 16/34 measures 3933 feet in length, accommodating small to medium aircraft operations. Prevailing northerly winds at an average of 7.1 knots characterize local wind patterns, with occasional gusts up to 25 knots. Visibility typically remains strong, averaging 11.7 statute miles, though fog occurs in 14.8% of observations.

Approach Considerations

Runway 16/34 demonstrates favorable wind alignment, with winds compatible 100% of the time and an average crosswind of just 3.8 knots. September through November represent the most consistent VFR flying months, offering optimal approach conditions. Pilots should anticipate potential low visibility scenarios, particularly during winter and early spring periods.

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.