Alton Bay Seaplane Base Seaplane Base
B18 · Alton Bay, NH · Non-towered
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-07 · night begins 08:32 PM
| Event | Local (EDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:09 AM | 09:09Z |
| Sunrise | 05:41 AM | 09:41Z |
| Sunset | 08:00 PM | 00:00Z |
| Evening civil twilight Loggable night begins | 08:32 PM | 00:32Z |
Plan a flight from B18
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Full reports: nearest reporting station
Advisories
Airspace hazards
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Runways
| Runway | Length | Your margin |
|---|---|---|
| 01/19 | 2,600 ft |
Prefer one flat page? Full runway details for B18 → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the B18 kneeboard →
Comms & NavAids
Communication frequencies
Taxi & takeoff
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
CON 112.90 · ENE 117.10
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| CON · Concord | VOR/DME | 112.90 · 76X | Low | r059° / 21.4 NM |
| ENE · Kennebunk | VOR/DME | 117.10 · 118X | High | r294° / 27.4 NM |
Prefer one flat list? All B18 frequencies →
Charts & procedures
Airport info
Airport information
- FAA LID
- B18
- Coordinates
- 43.4776, -71.2370
- Elevation
- 504 ft MSL
- Magnetic variation
- 16W
- Sectional chart
- NEW YORK
- Airport use
- Public
- Control tower
- No
- ARTCC
- BOSTON (ZBW)
- Flight service (FSS)
- BANGOR · 122.2 · 1-800-WX-BRIEF
- NOTAM facility
- BGR
- Attendance
- UNATNDD
- Segmented circle
- No
- Wind indicator
- yes
- Activated
- 1994/02
- Distance from city
- 2 N
Night operations
- Pilot-controlled lighting
- Usually keyed on CTAF 122.8 — confirm the click sequence in the Chart Supplement ↗
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are under Sun & FAA night in the Weather section.
Ownership & management 2 contacts
Remarks FAA · 8 notes
General
- RWY 01W/19W PWRLINE MKD WITH ORANGE BALLS 1000 FT S OF THR AT S END; LESS THAN 30 FT HGT ALG ROADWAY.
- ALL SEAPLANE TKOFS & LDGS MUST BE N OF THE BANDSTAND. ALL TVL S OF THE BANDSTAND MUST NOT EXCEED HEADWAY SPD.
- FOR SEAPLANE PRKG & ICE RWY CONDS CALL 603-271-7398.
- FOR CD CTC BOSTON APCH 603-594-5552.
- TKOF & LDG USING RWY 19W PROHIBITED JAN - MAR.
Runways
- RWY 01W THLD APRXLY 100 FT NE OF FLOATING BANDSTAND.
- RWY 01W/19W HAS ICE IN WINTER PLOWED TO APRXLY 2600 FT. CK NOTAMS FOR ICE RWY CONDS.
Contact
- PUBLIC WATERS OF THE STATE OF NH.
Nearby airports
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Also nearby: NH68 Merrymeeting Lake Seaplane Base (private) (3 NM) · 72NH Barndoor Island Seaplane Base (private) (5 NM) · NH15 Locke Lake Airport (5 NM) · 48NH Winter Harbor Seaplane Base (private) (7 NM) · NH64 Mirror Lake Seaplane Base (private) (9 NM)
About B18
Alton Bay Seaplane Base (B18) is a seaplane base in Alton Bay, NH, at 504 ft MSL. It has 1 runway, the longest 2,600 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for B18, refreshed from the Aviation Weather Center and FAA NASR.
Does B18 have a control tower?
No. Alton Bay Seaplane Base is a non-towered (pilot-controlled) seaplane base; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at B18?
Alton Bay Seaplane Base has 1 runway; the longest is 2,600 ft. See the Runways section for headings, surface, and lighting.
Where is B18?
Alton Bay Seaplane Base is in Alton Bay, NH, at an elevation of 504 ft MSL. Coordinates: 43.4776, -71.2370.
Fly out of B18 often?
Save B18 as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open B18 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.