1
Runway
0
Frequencies
0
Procedures
0
NOTAMs
Quick Facts
ICAO
KB18
FAA
B18
Elevation
504 ft MSL
Runways
1
Frequencies
0
Tower
No
Fuel
N/A
Coordinates
43.478, -71.237
Airport Information
Facility Type
SEAPLANE BASE
Elevation
504 ft MSL
Control Tower
No
Fuel Types
None listed
Coordinates
43.4776, -71.2370
Current Weather
METAR KLCI 061156Z AUTO 19007KT 10SM CLR 16/11 A2978 RMK AO2 SLP085 70001 T01610111 10167 20133 53000
Flight Category
VFR
Wind
190° at 7 kt
Visibility
10+ SM
Temperature
16.1°C
Dewpoint
11.1°C
Altimeter
1008.50 inHg
Cloud Cover
CLR
Nearest weather from KLCI (12 NM away)
Observed 2026-05-06 11:56Z
Nearby Weather Cameras
No camera at KB18. Showing nearest cameras.
Sanford Seacoast Reg Airport
South · Camera 3 · 4 cameras total
32 NM away
Eastern Slopes Regional Airport
SouthEast · Camera 2 · 4 cameras total
35 NM away
12 camera angles available
See all cameras, directions, and nearby airport cameras
Sign up free to view all cameras →Runways
| ID | Length | Width | Surface | Lights |
|---|---|---|---|---|
| 01/19 | 2,600 ft | 100 ft | WATER-E | - |
Active NOTAMs
No active NOTAMs for KB18.
Nearby Airports in New Hampshire
Nearest airports
- NH30 — AVERY POINT
MOULTONBOROUGH
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MOULTONBOROUGH
- KBML — BERLIN RGNL
BERLIN
- 51NH — Blue Puffin Farm Heliport
Deerfield
- KASH — BOIRE FLD
NASHUA
New Hampshire airports
KB18 Operational Overview
Location & Facility
Alton Bay Seaplane Base (KB18) is a seaplane base located in Alton Bay, New Hampshire, United States. The field sits at an elevation of 504 feet above mean sea level (MSL) at coordinates 43.4776°N, 71.2370°W.
Runways
Alton Bay Seaplane Base has 1 runway. The longest runway (01/19) measures 2,600 feet by 100 feet with a water-e surface.
Communications & Operations
Alton Bay Seaplane Base is a non-towered (pilot-controlled) field.
Weather Cameras
3 FAA Weather Cameras are available near Alton Bay Seaplane Base, providing real-time visual weather conditions updated every 10 minutes. AeroCopilot integrates these cameras with AI-powered weather analysis to help pilots assess visibility and ceiling conditions before departure.
Current Conditions
The current flight category at Alton Bay Seaplane Base is VFR (Visual Flight Rules — good flying conditions). Weather conditions are updated in real-time from official NOAA Aviation Weather Center observations.
Frequently Asked Questions
What is KB18?
KB18 is the ICAO identifier for Alton Bay Seaplane Base, a public-use airport located in Alton Bay, New Hampshire, United States.
How many runways does Alton Bay Seaplane Base have?
Alton Bay Seaplane Base (KB18) has 1 runway. See the runway table above for dimensions and surface types.
What is the elevation of KB18?
The field elevation of Alton Bay Seaplane Base is 504 feet above mean sea level (MSL).
Is fuel available at KB18?
No fuel types are currently listed for Alton Bay Seaplane Base. Contact the FBO directly for availability.
What are the current weather conditions at KB18?
The current flight category at Alton Bay Seaplane Base is VFR. See the METAR section above for full decoded weather data including wind, visibility, temperature, and altimeter.
Are there active NOTAMs at KB18?
There are currently no active NOTAMs for Alton Bay Seaplane Base.
How do I access complete data for KB18?
Sign up for a free AeroCopilot account to access all frequencies, full NOTAM text with AI interpretation, decoded forecasts, and IFR procedure charts for Alton Bay Seaplane Base.
Where is Alton Bay Seaplane Base located?
Alton Bay Seaplane Base (KB18) is located in Alton Bay, New Hampshire, United States, at an elevation of 504 ft MSL.
Does KB18 have weather cameras?
KB18 does not have a direct weather camera, but there are nearby cameras within range. Sign up for AeroCopilot to view all nearby airport cameras.