1
Runway
2
Frequencies
0
Procedures
0
NOTAMs
Quick Facts
FAA
B18
Elevation
504 ft MSL
Runways
1
Frequencies
2
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
ARTCC
BOSTON
Coordinates
43.4776, -71.2370
Ownership
Public
Hours of Operation
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 B18. 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 |
|---|---|---|---|---|
| 01W/19W | 2,600 ft | 100 ft | WATER | - |
Frequencies
| Type | Frequency | Name |
|---|---|---|
| CTAF | 122.8 | ALTON BAY |
| UNICOM | 122.8 | ALTON BAY |
Active NOTAMs
No active NOTAMs for B18.
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NASHUA
New Hampshire airports
B18 Operational Overview
Location & Facility
ALTON BAY (B18) is a publicly owned seaplane base open to the public 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 has 1 runway. The longest runway (01W/19W) measures 2,600 feet by 100 feet with a water surface.
Communications & Operations
ALTON BAY is a non-towered (pilot-controlled) field. A total of 2 communication frequencies are published for this facility.
Weather Cameras
3 FAA Weather Cameras are available near ALTON BAY, 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 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 B18?
B18 is the ICAO identifier for ALTON BAY, a public-use airport located in ALTON BAY, New Hampshire, United States.
How many runways does ALTON BAY have?
ALTON BAY (B18) has 1 runway. See the runway table above for dimensions and surface types.
What is the elevation of B18?
The field elevation of ALTON BAY is 504 feet above mean sea level (MSL).
Is fuel available at B18?
No fuel types are currently listed for ALTON BAY. Contact the FBO directly for availability.
What are the current weather conditions at B18?
The current flight category at ALTON BAY is VFR. See the METAR section above for full decoded weather data including wind, visibility, temperature, and altimeter.
Are there active NOTAMs at B18?
There are currently no active NOTAMs for ALTON BAY.
How do I access complete data for B18?
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.
Where is ALTON BAY located?
ALTON BAY (B18) is located in ALTON BAY, New Hampshire, United States, at an elevation of 504 ft MSL.
Does B18 have weather cameras?
B18 does not have a direct weather camera, but there are nearby cameras within range. Sign up for AeroCopilot to view all nearby airport cameras.