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Plantation Key Seaplane Base (42FL) Area Aviation Weather & Runway Winds

As of 9:53 PM ET, Oct 28, based on the nearest station (KMTH), 42FL is currently VFR with winds from 040° at 6 knots, visibility 10+ statute miles, and no ceiling reported.

Aviation weather near Plantation Key Seaplane Base in Marathon, FL, decoded from the nearest reporting station (KMTH): conditions and runway crosswinds.

Plantation Key Seaplane Base (42FL) is a seaplane base in Marathon, FL. 42FL has no weather station of its own. Conditions here are decoded from KMTH, about 29 nm away, the nearest reporting station, and local conditions can differ. It has one runway (09/27), the longest 6,600 ft. The nearest TAF is issued for KMTH.

Ask ATIS AIAsk anything about 42FL's weather, runways or delays, or search another airport.
VFR
Observed 0153Z (9:53 PM EDT)live · refreshes every 60s

No weather station at this airport: showing the nearest station KMTH, 28.9 nm away.

Wind
040° 6 kt
Visibility
10+ sm
Ceiling
Unlimited
Altimeter
29.92"
Temp / Dew
80°F / 27°C
feels like 86°F

Wind from the northeast (040°) at 6 kt, visibility 10+ statute miles, a few clouds at 2,200 ft, temperature 27°C (80°F), altimeter 29.92 inHg. Conditions are Visual Flight Rules (VFR).

Raw METAR
METAR KMTH 290153Z AUTO 04006KT 10SM FEW022 27/24 A2992 RMK AO2 SLP133 T02670244

What changed at KMTH (nearest station)?

Since the 0053Z (8:53 PM EDT) report, compared automatically against the latest METAR.

No significant changes since the 0053Z (8:53 PM EDT) report, conditions are holding steady.

Current pilot readout for 42FL

Based on the nearest station (KMTH), 42FL is currently VFR with winds from 040° at 6 knots, visibility 10+ statute miles, and no ceiling reported. the wind favors east-facing runway ends (09). Density altitude is approximately 1,400 ft (field elevation 0 ft). Review the latest TAF below for forecast changes before departure.

New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →

Runway wind check

Estimated head/tailwind and crosswind for each runway end from the current reported wind.

RunwayHead / TailCrosswind
09FAV4 kt head4 kt left
274 kt tail4 kt right

Open the crosswind calculator to try your own wind and runway numbers →

42FL runways

1 physical runway · 2 runway ends. Each card opens the runway's intelligence page: equipment and lighting, LAHSO, frequencies, today's configuration, predicted use, history and approaches.

  • Runway 09/27
    6,600 × 3300 ft · WATER
    Status not monitored
    Current use
    no stated-runway source at 42FL
    Wind
    09
    4 kt headwind · 4 kt crosswind from left
    27
    4 kt tailwind · 4 kt crosswind from right
    no active equipment NOTAM receivedView Runway Intelligence →

“Current use” is what the facilitystates; wind components are arithmetic on the current METAR against TRUE headings; status reflects NOTAMs received through SWIM, the tower's TFDM record and the D-ATIS — a runway reads “Open” only with a complete NOTAM picture.

24-hour trend

Wind, ceiling and flight category over the last 24 hours.

Wind (kt)Gusts (kt)Bottom strip, flight category:VFRMVFRIFRLIFRNo report
0142802Z13Z01Z

Over the last 23 h: wind 10→6 kt, ceiling 1,400 ft → unlimited.

42FL weather radar

Live NEXRAD + lightning, with a 4-hour future-radar forecast. Drag to pan, tap ⚡ to toggle lightning.

Loading…
Loading radar…

Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © Stadia Maps © OpenMapTiles © OpenStreetMap

NOAA NEXRAD composite and lightning, updated about every five minutes; amber frames are HRRR model guidance, not observed radar. Not for navigation.

Pilot reports (PIREPs) within 100 NM of 42FL

Reported by pilots in flight over the past 6 hours, via aviationweather.gov.

PIREP0124Z (9:24 PM EDT) · 68 NM N of 42FL · 1,900 ft MSL · A320
smooth turbulence
Show raw report
FLL UA /OV FLL270005/TM 0124/FL019/TP A320/WX CLR/TB SMOOTH
FLL UAHeader: reporting station and UA: a routine pilot report.
OV FLL270005Location: fix or navaid, optionally with a radial and distance in NM.
TM 0124Reported at 01:24 UTC.
FL019Altitude: 1,900 ft MSL.
TP A320Aircraft type reporting.
WX CLRWeather and flight visibility observed.
TB SMOOTHTurbulence: smooth.
PIREP0019Z (8:19 PM EDT) · 68 NM N of 42FL · 1,800 ft MSL · B39M
smooth turbulence
Show raw report
FLL UA /OV FLL270006/TM 0019/FL018/TP B39M/WX VMC/TB SMOOTH
FLL UAHeader: reporting station and UA: a routine pilot report.
OV FLL270006Location: fix or navaid, optionally with a radial and distance in NM.
TM 0019Reported at 00:19 UTC.
FL018Altitude: 1,800 ft MSL.
TP B39MAircraft type reporting.
WX VMCWeather and flight visibility observed.
TB SMOOTHTurbulence: smooth.
PIREP0004Z (8:04 PM EDT) · 92 NM N of 42FL · 4,000 ft MSL · C172
Show raw report
RSW UA /OV RSW097044/TM 0004/FL040/TP C172/TB NEG
RSW UAHeader: reporting station and UA: a routine pilot report.
OV RSW097044Location: fix or navaid, optionally with a radial and distance in NM.
TM 0004Reported at 00:04 UTC.
FL040Altitude: 4,000 ft MSL.
TP C172Aircraft type reporting.
TB NEGTurbulence: none reported.
PIREP2327Z (7:27 PM EDT) · 66 NM E of 42FL · 38,000 ft MSL · A20N
Show raw report
MIA UA /OV ZBV190048/TM 2327/FL380/TP A20N/TB NEG
MIA UAHeader: reporting station and UA: a routine pilot report.
OV ZBV190048Location: fix or navaid, optionally with a radial and distance in NM.
TM 2327Reported at 23:27 UTC.
FL380Altitude: 38,000 ft MSL.
TP A20NAircraft type reporting.
TB NEGTurbulence: none reported.
PIREP2310Z (7:10 PM EDT) · 67 NM N of 42FL · 2,500 ft MSL · B752
smooth turbulence
Show raw report
FLL UA /OV FLL270009/TM 2310/FL025/TP B752/WX CLR/TB SMOOTH
FLL UAHeader: reporting station and UA: a routine pilot report.
OV FLL270009Location: fix or navaid, optionally with a radial and distance in NM.
TM 2310Reported at 23:10 UTC.
FL025Altitude: 2,500 ft MSL.
TP B752Aircraft type reporting.
WX CLRWeather and flight visibility observed.
TB SMOOTHTurbulence: smooth.
PIREP2233Z (6:33 PM EDT) · 100 NM E of 42FL · 35,000 ft MSL · B38M
Show raw report
MIA UA /OV ZBV140040/TM 2233/FL350/TP B38M/TB NEG
MIA UAHeader: reporting station and UA: a routine pilot report.
OV ZBV140040Location: fix or navaid, optionally with a radial and distance in NM.
TM 2233Reported at 22:33 UTC.
FL350Altitude: 35,000 ft MSL.
TP B38MAircraft type reporting.
TB NEGTurbulence: none reported.
PIREP2217Z (6:17 PM EDT) · 85 NM N of 42FL · during descent · GLF5
Show raw report
PBI UA /OV BCT270010/TM 2217/FLDURD/TP GLF5/SK VFR
PBI UAHeader: reporting station and UA: a routine pilot report.
OV BCT270010Location: fix or navaid, optionally with a radial and distance in NM.
TM 2217Reported at 22:17 UTC.
FLDURDReported during descent.
TP GLF5Aircraft type reporting.
SK VFRSky condition: cloud bases and tops in hundreds of feet MSL.
PIREP2213Z (6:13 PM EDT) · 94 NM N of 42FL · 20,000 ft MSL · C55B
Show raw report
RSW UA /OV RSW095040/TM 2213/FL200/TP C55B/TB NEG 200
RSW UAHeader: reporting station and UA: a routine pilot report.
OV RSW095040Location: fix or navaid, optionally with a radial and distance in NM.
TM 2213Reported at 22:13 UTC.
FL200Altitude: 20,000 ft MSL.
TP C55BAircraft type reporting.
TB NEG 200Turbulence: none reported 200.

⚠️ PIREPs are unverified pilot reports. Not for operational use: conditions change between reports.

Recent aviation weather trends at 42FL

From ATIS Alerts' hourly weather history.

Over the past 24 hours, the nearest station KMTH reported a mix of conditions, most often VFR across 38 observations, with 14 flight-category changes. The strongest gust reached 24 kt, the lowest ceiling was 500 ft. Wind most often came from the N.

Last 24 hours
VFR 50%MVFR 29%IFR 21%
Wind avg/max: 8/13 kt
Max gust: 24 kt
Lowest ceiling: 500 ft
Lowest vis: -
Prevailing wind: N
Category changes: 14

Most recent change: MVFR → VFR

Last 7 days
VFR 92%MVFR 5%IFR 4%
Wind avg/max: 8/14 kt
Max gust: 30 kt
Lowest ceiling: 500 ft
Lowest vis: 9 sm
Prevailing wind: N
Category changes: 9

Most recent change: MVFR → VFR

Wind-favored runway - past 30 days

Share of hours each runway had the most headwind. From wind reports, not ATC assignments.

09
97%
27
3%

TAF | Terminal Aerodrome Forecast

Issued 2322Z (7:22 PM EDT)

TAF KMTH 282322Z 2900/2924 05006KT P6SM SCT020

New to TAFs? How to read one →

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No live weather from 42FL

Live crosswind meter

42FL has no weather feed online, so the wind comes from KMTH, 29 nm away.

N09276 kt
Headwind
4 kt
Crosswind (from the left)
4 kt

Wind is 48° off runway 09, the end with the most headwind right now.

Have a weather station at 42FL? Help us make your field's weather available to every pilot, free. Add your field's wx station →

Water · 6,600 ft. Headings from FAA runway data. Not for navigation.

Field aerial

North up

Aerial photo of Plantation Key Seaplane Base (42FL)
N ↑

Imagery: USGS The National Map (public domain). Something off? ✏️ Suggest an edit

Airport info

From the FAA airport record (cycle 2026-10-01) and OurAirports.

Services

Attended
Fri-Mon IREG local
Landing fee
No
Control tower
None
Wind indicator
Unlighted

Airport

Type
Seaplane base
FAA LID
42FL
City
Marathon
State
Florida
Country
United States
Elevation
0 ft
Coordinates
24.9712, -80.5956
Runways
1 physical runway · 2 runway ends
Longest runway
6,600 ft
Weather reporting
Nearest station KMTH
TAF
Nearest KMTH
Time zone
America/New_York
Next sunset
19h 59m

Run a flight school, FBO, or club here? Embed 42FL's live status on your website, free →

Nearby airports

Compare nearby METAR/TAF stations within 25, 50 and 100 NM before departure or arrival.

VFRMVFRIFRLIFRNo report
See all Florida airports →

Pilot PIREPs for Plantation Key Seaplane Base (42FL)

Community-submitted

Community-submitted airport notes from pilots about runway conditions, wildlife, FBOs, fuel, turbulence, ramp access, and local tips.

Read recent community-submitted pilot notes for Plantation Key Seaplane Base, including runway conditions, wildlife activity, FBO/fuel notes, turbulence, ramp access, and local airport tips.

⚠️ Pilot PIREPs on ATIS Alerts are community-submitted airport notes for situational awareness only. They are not official FAA PIREPs, NOTAMs, weather briefings, airport advisories, or flight-planning guidance. Always verify with official FAA/NWS sources, airport management, ATC, and current publications.

No Pilot PIREPs have been submitted for 42FL yet. Recently flew here? Help the next pilot by leaving a quick airport note.

Pilot PIREPs are community pilot notes for situational awareness only, not official FAA PIREPs or advisories. Verify with official sources. Notes are moderated before they appear; helpful marks and reports help us keep them useful.

⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.

Spotted incorrect airport info? ✏️ Suggest an edit

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