KMTH/MTH METAR & TAF Florida Keys Marathon International Airport

Marathon, FloridaElevation 5 ftMedium airport

CURRENT STATUS

VFR57 min old

No ceiling, visibility 9 SM, gusts to 30 kt.

FLIGHT CATEGORY

VFR

ceiling & visibility

WIND

040@12

gust 30 kt

VISIBILITY

9 SM

14.5 km

CEILING

None

no BKN/OVC layer

DENSITY ALT

1,323 ft

+1,318 ft vs field

ACTIVE NWS ALERTS

Active weather alerts

Coastal Flood AdvisoryMinor · Expected · Likely

25 0800Z to 26 0900Z

Monroe Middle Keys; Monroe Lower Keys

* WHAT...Saltwater flooding. * WHERE...Middle and Lower Florida Keys. * WHEN...Until 5 AM EDT Monday. * IMPACTS...Saltwater flooding of low elevation streets and lots is expected. Some storm drains will overflow, and some seawalls and docks will be overtopped. Boaters can expect less clearance under fixed bridges. Motorists should remember that persistent puddles around the times of high tide a…

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Alerts from the National Weather Service. For situational awareness only; always confirm against an official briefing.

CURRENT METAR

Decoded observation

Observed 2053Z (4:53 PM local) · 57 min old

KMTH is currently VFR. Winds are from the northeast at 12 knots gusting 30. Visibility is 9 statute miles. There is no ceiling. Reported weather: light rain. Main concerns: Wind gusting to 30 kt (gust spread 18 kt).

WIND

40° at 12 kt, gust 30

Gusts 18 kt above the steady wind.

VISIBILITY

9 statute miles

14.5 km, good.

CEILING & SKY

FEW024 FEW031 SCT050

FEW and SCT layers are not ceilings.

TEMP / DEWPOINT

26°C / 22°C

79°F / 72°F. 4°C spread.

ALTIMETER

29.91 inHg

1012.9 hPa, near standard.

WEATHER & HAZARDS

RA, GUST

Rain reported.

Codes in this report: AUTO FEW SCT RMK AO2

Hover or tap any group for a plain-English explanation.

REMARKS: DECODED

AO2

automated station with a precipitation discriminator (can tell rain from snow)

PK WND 01030/2046

peak wind 30 knots from 010 degrees at 20:46

RAB53

rain began at :53 past the hour

SLP129

sea-level pressure 1012.9 hPa

P0000

0.00 inches of precipitation in the last hour

60000

0.00 inches of precipitation in the last 3-6 hours

T02610217

precise temperature 26.1°C, dew point 21.7°C

56009

3-hour pressure tendency: falling then steady (0.9 hPa change)

TERMINAL AERODROME FORECAST

TAF timeline

Issued 1722Z (1:22 PM local) · valid to 1800Z (2:00 PM local)

KMTH forecast starts VFR at 18Z. Worst period is 20Z to 06Z with VFR possible (GUST). Best period is 18Z to 20Z (VFR). Conditions are roughly steady over the period.

VFR

BKN25025,000 ft

1800Z2:00 PM2248Z6:48 PM0336Z11:36 PM0824Z4:24 AM1312Z9:12 AM1800Z2:00 PM

Codes in this report: P6SM FEW SCT BKN

Tap any group to decode it.

FAA: no delays reported at MTH.

Source: FAA System Operations (ASWS). Operational status only; verify with official FAA sources and NOTAMs.

SUGGESTED RISK · TRAINING USE

Suggested risk level: Moderate

›Wind gusting to 30 kt (gust spread 18 kt).

›Large gust spread: 12 kt gusting 30 kt.

A suggested risk level for training and situational awareness only, not a go/no-go authority. Verify with official sources and apply your personal minimums.

FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

Current aviation conditions show flight category VFR, wind from 40° at 12 kt, gusting 30 kt, visibility 9 SM, ceiling none. Forecast suggests this afternoon chance showers and thunderstorms, high near 83F, low near 75F, 56% chance of precipitation. Key risks: gusty winds; thunderstorms in the forecast.

PILOT WEATHER NOTES

Gusty windsMETAR

Winds gusting to 30 kt. Plan for the gust factor on approach and landing.

Thunderstorms in the forecastWeather.gov

This Afternoon: Chance Showers And Thunderstorms. Watch for developing convection and plan alternates.

Day	Conditions	Temp F	Wind	Gusts	Precip	Pilot note
This Afternoon	Chance Showers And Thunderstorms	83/75	NE 13 kt	–	56%	Thunderstorms in the forecast
Monday	Showers And Thunderstorms Likely	84/75	NE 17 kt	–	56%
Tuesday	Chance Showers And Thunderstorms	84/76	NE 17 kt	–	39%
Wednesday	Chance Showers And Thunderstorms	85/77	NE 13 kt	–	39%
Thursday	Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms	84/77	NE 9 kt	–	30%
Friday	Slight Chance Showers And Thunderstorms	84/77	E 9 kt	–	23%
Saturday	Slight Chance Showers And Thunderstorms	84/77	E 9 kt	–	20%

Source: National Weather Service (office KEY). Forecast issued 2149Z.

Radar

Radar data: NOAA/NWS MRMS composite reflectivity. For situational awareness only, not a substitute for an official weather briefing.

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RUNWAYS & WIND

1 runway · crosswind ranking

ON-FIELD METAR

READING THE BARB · SWIPE FOR MORE →

Calm

5 kt

10 kt

15 kt

20 kt

25 kt

30 kt

35 kt

40 kt

45 kt

50 kt

65 kt

75 kt

100 kt

105 kt

Half feather = 5 kt, full = 10 kt, filled pennant = 50 kt; add them up. The staff points the direction the wind blows from.

WIND USED

040° at 12 kt, gust 30

Components computed from the current on-field METAR wind.

RECOMMENDED

RWY 0711 kt headwind · 5 kt crosswind

RUNWAYS BY WIND · best end

HEAD

11 kt

CROSS

5 kt L

BEST

HEAD

11 kt tail

CROSS

5 kt R

Components are estimates from the current METAR wind and runway heading. Verify with the Chart Supplement and NOTAMs.

RUNWAYS

Runway detail & declared distances

1 runway · longest 5,008 ft

07/25

Dimensions

5,008 x 100 ft

Surface

Asphalt (excellent)

Edge lights

MED

RWY 0767°T

Landing length (LDA)5,008 ft

TORA / TODA / ASDA5,008 / 5,008 / 5,008 ft

REILYes

VGSIPAPI (P4L)

Traffic patternLeft

RWY 25247°T

Landing length (LDA)5,008 ft

TORA / TODA / ASDA5,008 / 5,008 / 5,008 ft

VGSIPAPI (P4L)

Traffic patternLeft

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

FIELD CONDITIONS

Performance & density altitude

Density altitude

1,323 ft

Pressure altitude

15 ft

Field elevation

5 ft MSL

Temperature

26°C (79°F)

Dewpoint

22°C (72°F)

Altimeter

29.91 inHg

Density altitude estimates how the aircraft performs versus standard atmosphere. Higher density altitude reduces climb performance and increases takeoff distance.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset

2249Z 6:49 PM

Sunrise

1127Z 7:27 AM

Loggable night

2312Z (7:12 PM local) → 1104Z (7:04 AM local)

end of evening to start of morning civil twilight

Position lights required

2249Z (6:49 PM local) → 1127Z (7:27 AM local)

sunset to sunrise (91.209)

Night passenger currency

2349Z (7:49 PM local) → 1027Z (6:27 AM local)

1 hr after sunset to 1 hr before sunrise (61.57(b))

FAA definitions, shown in Zulu with airport-local time. Verify for your operation.

AIRPORT INFORMATION

Facility & services

Florida Keys Marathon International Airport is in Marathon, Florida. Field elevation 5 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT

OwnershipPublicly owned

UseOpen to the public

TypeMedium airport

ManagerMICHAEL LEGERE

Manager phone305-289-6302

AttendedDaily, 0800–1800

CHARTS & AIRSPACE

ICAO / IATAKMTH / MTH

SectionalMIAMI

Center (ARTCC)MIAMI

Flight service (AFSS)MIAMI

RegionFlorida

CountryUnited States

Coordinates24.7260, -81.0514

Distance from city3 NM E

SERVICES & LIGHTING

Fuel100LL · Jet A-1+

Control towerNon-towered

Field lightingSee remarks

BeaconSunset to sunrise · White-green (lighted land airport)

CTAF122.975

UNICOM122.975

FREQUENCIES

Communications

135.525

ASOS

133.5

MIAMI CNTR

CNTR

122.6

MIAMI RDO

RDO

122.8

CTAF/UNICOM

UNIC

122.975

CTAF

122.975

UNICOM

Not all tower/ground/approach frequencies are in our datasets. Verify with the FAA Chart Supplement.

AIRCRAFT ACTIVITY

KMTH traffic patterns

2026-07-11 to 2026-07-11, 1 days observed · data 2026-10-23

Insufficient confidence

TRAFFIC VOLUME (30-DAY)

AVG LANDINGS/DAY

AVG OPS/DAY

Operations trend (1 days)

Busiest day: Sat · Busiest month: Jul

FLEET MIX

Piston single 75%Jet 25%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES

›C25C (Jet) · ~1 landings/mo

›M20P (Piston single) · ~1 landings/mo

›P32R (Piston single) · ~1 landings/mo

›S22T (Piston single) · ~1 landings/mo

›A139 (Helicopter) · ~0 landings/mo

Data limitations (4)

›ADS-B coverage is incomplete; counts are an observed lower bound, not official totals.

›Some aircraft do not transmit usable ADS-B and are not counted.

›Aircraft types and based estimates are inferred and may be wrong.

›This is not official ATC, FAA, or airport data.

NEARBY AIRPORTS

Weather reference stations

Current flight category at nearby reporting stations.

KNQX Naval Air Station Key West/Boca Chica Field

36 NM W

VFR

KEYW Key West International Airport

40 NM W

VFR

KHST Homestead Air Reserve Base

58 NM NE

VFR

KTMB Miami Executive Airport

65 NM NE

UNKNOWN

KMIA Miami International Airport

76 NM NE

VFR

KOPF Miami-Opa Locka Executive Airport

82 NM NE

VFR

AIRPORT REMARKS

Operational remarks

›USCBP USER FEE FAC OPEN THUR-MON 0900-1730. CLSD TO ARRS TUE AND WED EXCEPT ON REQ AND APVL BY USCBP. CTC USCBP AT 305-289-2029. SEE SPL NOTICES - U.S. SPL CUST REQUIREMENT.

›SELF SVC FUEL H24.

›FOR CD IF UNA TO CTC ON FSS FREQ, CTC MIAMI ARTCC AT 305-716-1731.

›US CUSTOMS USER FEE ARPT.

›48 HR PPR FOR UNSKED PART 121 OPS WITH GTR THAN 30 PAX SEATS.

›AFT HR JET-A FUEL - 305-481-7615.

›PCR VALUE: 200/F/A/X/T

›ACTVT REIL RWY 07; PAPI RWY 07 & 25; MIRL RWY 07/25 - CTAF.

›EXISTED PRIOR TO 1959.

›BIRDS ON & INVOF ARPT.

›NOISE SENS AREA; USE NBAA NOISE ABATEMENT PROC; LCL ORDINANCE RQR ENG RUNUP IN DSGND AREA ON COML OR FBO RAMP FM 2300-0700 & FINES.

›ACFT MUST USE TWY A4 FOR RWY 25 FULL LEN DEP, NO RWY ACES BYD TXY A4.

›24 HR PPR FOR ACFT EQUIPPED WITH WEATHER MODIFICATION OR GEOENGINEERING EQPT 305.289.6302.

OFFICIAL LINKS & SOURCES

↗Official METAR on AviationWeather.gov

↗Search NOTAMs (official FAA NOTAM Search)

↗Official airport website

↗Wikipedia

↗KMTH on OurAirports

FREQUENTLY ASKED

Does KMTH have a METAR?

Yes. KMTH has a current METAR observation, decoded into plain English on this page.

Does KMTH have a TAF?

Yes, a TAF is issued for KMTH; the decoded forecast timeline is shown above.

What is the field elevation at KMTH?

KMTH sits at 5 ft MSL, which factors into the density-altitude estimate on this page.

Is this an official preflight weather briefing for KMTH?

No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.

This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.