Station Information

Station ID: 757
Latitude: 53.88
Longitude: -166.536667
Coastline code: 820
Station code: 21
Time span of data: 1955 – 2023
Completeness (%): 89
Date of last update: 10 Jan 2024

Green Arrow: Current Station
Yellow Marker: Neighbouring RLR Station
Red Marker: Neighbouring Metric Station

Please note: In many cases, the station position in our database is accurate to only one minute. Thus, the tide gauge may not appear to be on the coast.

Additional Data Sources (guide to additional data sources)

Nearby GNSS Stations from SONEL: AV09
Nearby Real Time Stations from VLIZ: dutc, dutc2
Fast Delivery Data from UHSLC station 41: hourly and daily
Research Quality Data from UHSLC station 41: hourly and daily

Station Documentation

Link to RLR information.

Documentation added 1991-06-11

Unalaska 820/021 RLR(1970) is 9.0m below BM7

Documentation added 2011-11-24

Using information from the NOAA website the RLR diagram has been revised. Primary benchmark remains NO 7 1956 3.597m above gauge datum.

Data Authority

N.O.A.A. / N.O.S.
N/oes33, Ssmc4, Room 6531
1305 East-West Highway
Silver Spring,
MD 20910