South Africa (Simonstown) Station information sheet

GLOSS number 268
Station name


Country South Africa
Time zone 030E, GMT + 2hrs
Latitude (+ve N) -34.18333
Longitude (+ve E) 18.43333
Ocean Atlantic
Observation period(s) 1957-
Responsible country South Africa
Authority responsible
for tide gauge
Hydrographer, South African Navy, Private Bag X1, Tokai 7966, South Africa
GLOSS contact Prof.G.B.Brundrit
Dept.of Oceanography
University of Cape Town
Rondebosch 7700
South Africa
Committed to GLOSS Yes
Operational Yes
Float Yes
Pressure No
Bubbler No
Acoustic Yes
Radar No
Digital data Yes
Additional parameters Sea temperature (from 1990), air pressure (from 1990)
Data acquisition rate Float/stilling well - digitized hourly. Acoustic meaned values recorded at one minute intervals.
Fast delivery data at UHSLC Download h221.dat from UHSLC   Format documentation for UHSLC data
High frequency data at BODC    Download document g268.txt  from BODC   
High frequency data at UHSLC Download from UHSLC   Download documentation qa221a.dmt from UHSLC   Format documentation for UHSLC data
Real-time data available No
Additional parameters (real-time) Sea temperature (from 1990), air pressure (from 1990)
Tide gauge benchmarks Trig Survey BM 28 G. UTM Grid Reference 34 HBT 641144.
Benchmark relationships Tide Gauge Zero (TGZ) = South Africa Chart Datum TGZ = 0.651m below LLD (MSL) until 31 December 1978 TGZ = 0.900m below LLD (MSL) from 01 January 1979 TGZ = 3.663m below BM 28 G
Data at PSMSL  
Annual MSL (RLR) data Download annual MSL (RLR) data for Simonstown
Annual MSL (RLR) plot View annual MSL (RLR) plot for Simonstown
MSL method Doodson X0 filter
PSMSL code 430/061
Other relevant codes UHSLC 221
Additional information  
Other relevant information Values based on GPS have been observed but not finally calculated.
Nearest Met. station Cape Town
Last updated 2002-12-11