Alton Bay Seaplane Base (B18) Area Aviation Weather & Runway Winds
Aviation weather near Alton Bay Seaplane Base in Alton Bay, NH, decoded from the nearest reporting station (KLCI) — conditions, runway crosswinds, and free Telegram airport alerts.
Alton Bay Seaplane Base (B18) is a seaplane base in Alton Bay, NH. B18 has no weather station of its own — conditions here are decoded from KLCI, about 10 nm away, the nearest reporting station, and local conditions can differ. Its 2 runways (01, 19) — longest 2,600 ft — are checked against the current wind in the crosswind table below. The nearest TAF is issued for KCON. Track it in the ATIS Alerts Telegram bot to get alerts read from KLCI, the station this page is based on.
No weather station at this airport — showing the nearest station KLCI, 9.8 nm away.
Wind from the south-southeast (160°) at 6 kt, visibility 10+ statute miles, a few clouds at 2,700 ft, scattered clouds at 7,000 ft, broken clouds at 12,000 ft, temperature 21°C (70°F), altimeter 29.72 inHg. Conditions are Visual Flight Rules (VFR), ceiling 12,000 ft.
METAR KLCI 290356Z AUTO 16006KT 10SM FEW027 SCT070 BKN120 21/19 A2972 RMK AO2 SLP061 P0001 T02110189 PWINO $
What changed at KLCI (nearest station)?
Since the 0256Z (10:56 PM EDT) report — compared automatically against the latest METAR.
No significant changes since the 0256Z report — conditions are holding steady.
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Current pilot readout for B18
Based on the nearest station (KLCI), B18 is currently VFR with winds from 160° at 6 knots, visibility 10+ statute miles, and a 12,000 ft ceiling. The strongest crosswind component is currently on runway 01, about 2 knots. Density altitude is approximately 1,600 ft (field elevation 504 ft). B18 does not publish a TAF — the nearest TAF station is KCON, about 20 nm away.
⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
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Track B18 free on TelegramRunway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
Use this section to quickly compare current wind alignment across available runways at B18. This is intended as a planning aid only and should not replace official performance calculations or pilot judgment.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 01FAV | 2,600 ft | WATER-E | 6 kt tail | 2 kt right |
| 19 | 2,600 ft | WATER-E | 6 kt tail | 2 kt right |
Open the crosswind calculator — try your own wind and runway numbers →
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 23 h: wind 3→6 kt, ceiling unlimited → 12,000 ft.
B18 weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast — drag to pan, tap ⚡ to toggle lightning.
Live weather radar around Alton Bay Seaplane Base in Alton Bay, NH: the NOAA/NWS NEXRAD composite updates about every five minutes, with NOAA lightning strike density overlaid. The loop plays the past 50 minutes, then continues into a future-radar forecast (+1 to +4 hours, NOAA HRRR model) so you can see where precipitation around B18 is headed.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © OpenStreetMap © CARTO
Forecast frames (amber label) are HRRR model guidance, not observed radar. Lightning strike density appears as a blue-white glow when strikes are detected in view. Radar and lightning coverage are limited in parts of Alaska, Hawaii, and offshore areas. Not for navigation.
Pilot reports (PIREPs) within 100 NM of B18
Reported by pilots in flight over the past 6 hours — via aviationweather.gov.
Show raw report
ARP UAL978 4409N 07300W 0342 F350 225/035KT TB MOD CHOP IC
ARP UAL978 4409N 07300W 0342…Header — reporting station and UA: a routine pilot report.Show raw report
ALB UA /OV CAM/TM 0054/FL360/TP NMRS/TB CONT LGT
ALB UAHeader — reporting station and UA: a routine pilot report.OV CAMLocation — fix or navaid, optionally with a radial and distance in NM.TM 0054Reported at 00:54 UTC.FL360Altitude: 36,000 ft MSL.TP NMRSAircraft type reporting.TB CONT LGTTurbulence: cont light.Show raw report
RUT UA /OV RUT350010/TM 0050/FL330/TP E75L/SK TOP350
RUT UAHeader — reporting station and UA: a routine pilot report.OV RUT350010Location — fix or navaid, optionally with a radial and distance in NM.TM 0050Reported at 00:50 UTC.FL330Altitude: 33,000 ft MSL.TP E75LAircraft type reporting.SK TOP350Sky condition — cloud bases and tops in hundreds of feet MSL.Show raw report
PWM UA /OV PWM/TM 0050/FLDURD/TP B38M/SK OVC 002/RM BASES 150-200, SAW APCH LGTS JUST BEFORE MINS, SAW RUNWAY AT 100 ILS 11
PWM UAHeader — reporting station and UA: a routine pilot report.OV PWMLocation — fix or navaid, optionally with a radial and distance in NM.TM 0050Reported at 00:50 UTC.FLDURDReported during descent.TP B38MAircraft type reporting.SK OVC 002Sky condition — cloud bases and tops in hundreds of feet MSL.RM BASES 150-200, SAW APCH L…Remarks.Show raw report
LWM UA /OV LWM/TM 2341/FL187/TP E75S/TB NEG/RM SMOOTH DURC HYLND SID
LWM UAHeader — reporting station and UA: a routine pilot report.OV LWMLocation — fix or navaid, optionally with a radial and distance in NM.TM 2341Reported at 23:41 UTC.FL187Altitude: 18,700 ft MSL.TP E75SAircraft type reporting.TB NEGTurbulence: none reported.RM SMOOTH DURC HYLND SIDRemarks.Show raw report
PWM UA /OV PWM/TM 2340/FL004/TP C208/SK BASES 004 DURD ILS 11
PWM UAHeader — reporting station and UA: a routine pilot report.OV PWMLocation — fix or navaid, optionally with a radial and distance in NM.TM 2340Reported at 23:40 UTC.FL004Altitude: 400 ft MSL.TP C208Aircraft type reporting.SK BASES 004 DURD ILS 11Sky condition — cloud bases and tops in hundreds of feet MSL.Show raw report
LEB UA /OV LEB/TM 2338/FL070/TP C208/TB LGT CHOP/RM SMOOTH SE OF KLEB
LEB UAHeader — reporting station and UA: a routine pilot report.OV LEBLocation — fix or navaid, optionally with a radial and distance in NM.TM 2338Reported at 23:38 UTC.FL070Altitude: 7,000 ft MSL.TP C208Aircraft type reporting.TB LGT CHOPTurbulence: light chop.RM SMOOTH SE OF KLEBRemarks.Show raw report
PWM UA /OV PWM/TM 2319/FL004/TP CL35/SK OVC004/WX 1/2SM/RM DURD RY11 PWM
PWM UAHeader — reporting station and UA: a routine pilot report.OV PWMLocation — fix or navaid, optionally with a radial and distance in NM.TM 2319Reported at 23:19 UTC.FL004Altitude: 400 ft MSL.TP CL35Aircraft type reporting.SK OVC004Sky condition — cloud bases and tops in hundreds of feet MSL.WX 1/2SMWeather and flight visibility observed.RM DURD RY11 PWMRemarks.⚠️ PIREPs are unverified pilot reports. Not for operational use — conditions change between reports.
Recent aviation weather trends at B18
From ATIS Alerts' hourly weather history.
Over the past 24 hours, the nearest station KLCI reported mostly VFR across 28 observations, with 4 flight-category changes. The strongest gust reached 25 kt, the lowest ceiling was 2,800 ft. Wind most often came from the S.
Most recent change: MVFR → VFR
Most recent change: MVFR → VFR
- 01/19
- 100%
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Airport facts
Reference data from the OurAirports dataset.
- Type
- Seaplane base
- FAA LID
- B18
- City
- Alton Bay
- State
- New Hampshire
- Country
- United States
- Elevation
- 504 ft
- Coordinates
- 43.4776, -71.2370
- Runways
- 2
- Longest runway
- 2,600 ft
- Weather reporting
- Nearest station KLCI
- TAF
- Nearest KCON
- Time zone
- America/New_York
- Next sunset
- 19h 38m
Run a flight school, FBO, or club here? Embed B18's live status on your website — free →
Nearby airports
Compare nearby METAR/TAF stations within 25, 50 and 100 NM before departure or arrival.
Within 25 NM
8 airports+2 more within 25 NM
25–50 NM
8 airports+2 more within 50 NM
50–100 NM
8 airports+2 more within 100 NM
RC flying fields nearby
AMA model-aircraft club fields around this airport — live wind, crosswind & flyability on each page.
- Winnipesaukee Radio Controller - Mile Hill Rd — Belmont, NH · 12 mi
- Ponderosa RC Hawks - Hubbard Rd — Berwick, ME · 20 mi
- Skyhaven Airport — Rochester, NH · 21 mi
B18 weather — frequently asked
What runways are available at B18?+
B18 has 2 runways — 01, 19; the longest is 2,600 ft. This page computes the live crosswind for each runway end from the current wind.
Where does the weather shown for B18 come from?+
Alton Bay Seaplane Base does not have its own weather station. Conditions shown here come from the nearest reporting station, KLCI, about 10 nm away — close enough for situational awareness, but local conditions at B18 can differ.
Does B18 have a TAF?+
No — B18 does not publish its own TAF. The nearest TAF station is KCON, about 20 nm away.
Does B18 broadcast D-ATIS?+
No — B18 does not broadcast D-ATIS. Alerts for B18 from the ATIS Alerts bot (@atisalerts_bot) are based on its METAR (via the nearest reporting station) instead.
Pilot PIREPs for Alton Bay Seaplane Base (B18)
Community-submittedCommunity-submitted airport notes from pilots about runway conditions, wildlife, FBOs, fuel, turbulence, ramp access, and local tips.
Read recent community-submitted pilot notes for Alton Bay 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 B18 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.
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