Station Information

Station ID: 350
Latitude: 50.80225
Longitude: -1.11125
Coastline code: 170
Station code: 131
Time span of RLR data: 1961 – 2016
RLR completeness (%): 94
Time span of metric data: 1930 – 2016
Metric completeness (%): 62
Frequency Code: 24
Link to ellipsoid: Available
Date of last update: 28 Jun 2017

Green Arrow: Current Station
Yellow Marker: Neighbouring RLR 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: PMTG
Nearby Real Time Stations from VLIZ: ptmt

Station Documentation

Link to RLR information.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 2001Jan02 :
Recent work on vertical land movements in the UK can be found from the University of Nottingham web site:http://ukcogr.iessg.nottingham.ac.uk/~eosi/
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 :
Portsmouth 170/131 RLR(1971) is 10.2m below BM SU6270 0053
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 05-MAY-92 :
Prior to 1991 data were received from UK Hydrographic Office
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 21-JUL-94 :
Gauge details prior to 1960 are unclear. In 1960 a Lea stilling well gauge was installed, replaced in January 1991 by an "A Class" bubbler system.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 27-OCT-94 :
A letter to the Dock and Harbour Authority, No.61, page 385, 1981 by Webber and Walden castes doubts on the stability of the datum at Portsmouth during the 1960s and 1970s.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 16-JUL-97 :
Revised BM information for 1980-96
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 24-May-2012 :
Following re-leveling the Grid Reference for the Primary banchmark has changed from SU 6270 0053 to SU 6269 0053.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 04-Jul-2014 :
There were no MSL's calculated for Portsmouth before August 2013 this was due to the fact that the primary channel, channel 2 was recording a constant -1.124m because of a leak on the
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 18-May-2015 :
TGI were at site 16.01.14 to carry out general maintenance and change the compressor.

Data Authority

British Oceanographic Data Centre
National Oceanography Centre
Joseph Proudman Building, 6 Brownlow Street
L3 5DA