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Alton Bay Seaplane Base Seaplane Base

B18 · Alton Bay, NH · 504 ft elevation · var 16W · Towered

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
Yes
ARTCC
BOSTON (ZBW)
Flight service (FSS)
BANGOR
NOTAM facility
BGR
Attendance
UNATNDD
Segmented circle
No
Wind indicator
yes
Activated
1994/02
Distance from city
2 N

Weather

METAR observed

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TAF forecast

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Sun & FAA night 2026-06-20

EventLocal (EDT)UTC
Morning civil twilight
Loggable night ends
04:28 AM08:28Z
Sunrise05:04 AM09:04Z
Sunset08:29 PM00:29Z
Evening civil twilight
Loggable night begins
09:05 PM01:05Z
Loggable night (§1.1)
09:05 PM → 04:28 AM
Night currency (§61.57)
09:29 PM → 04:04 AM

Plan a flight from B18

Runway 01/19

2,600 ft × 100 ft · WATER-E
01
Heading
n/a
19
Heading
n/a

Nearby navigation aids

NavAidTypeFreqRadial / Dist magnetic
CON · ConcordVORTAC112.90r059° / 21.4 NM
ENE · KennebunkVORTAC117.10r294° / 27.4 NM
PSM · PeaseVORTAC116.50r339° / 29.5 NM
MHT · ManchesterVOR-DME114.40r024° / 37 NM

Chart Supplement FAA A/FD

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Ownership & management

Owner
STATE OF NEW HAMPSHIRE
NHDOT, AERONAUTICS, 7 HAZEN DR, CONCORD, NH
603-271-2552
Manager
JASON LEAVITT
7 HAZEN DR, PO BOX 483, CONCORD, NH
603-545-2315

Remarks FAA

  • VFR USE ONLY.
  • 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.
  • PUBLIC WATERS OF THE STATE OF NH.
  • 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.

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.