Portsmouth tide gauge site
The brick tide gauge building is located on Victory jetty in Portsmouth Royal Naval Base.
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Tide gauge location
The measuring system is located on the south west corner of Victory jetty. In the building there is an instrument cabinet with a pneumatic bubbler system with two full-tide and mid-tide sensors.
The tide gauge is levelled to the tide gauge bench mark supported by Ordnance Survey auxiliary marks.
External users
Sea level pressures and/or elevations from this site are supplied to the following authority:
- Environment Agency, Southern Region
Site history
1960 – A Lea gauge was installed over the stilling well in the tide gauge building at Kings Stairs jetty
1991 – The DATARING system was installed with two full-tide bubbler systems
1999 – A new tide gauge site was established on Victory jetty; two full-tide and mid-tide bubblers were installed
2001 – POL data logger installed
| Location | |
| Latitude | 50° 48.131'N |
| Longitude | 1° 6.671'W |
| Grid ref | SU 6273 0067 |
| Earliest data | 1991 |
| Tidal levels | |
| HAT | 5.13 m |
| LAT | 0.14 m |
| MHWS | 4.72 m |
| MHWN | 3.87 m |
| MLWN | 1.90 m |
| MLWS | 0.73 m |
| H for 2023 | 5.02 m |
| L for 2023 | 0.30 m |
| H for 2024 | 5.08 m |
| L for 2024 | 0.20 m |
| MSR | 3.99 m |
| MNR | 1.97 m |
Abbreviations
HAT – highest astronomical tide
LAT – lowest astronomical tide
MHWS – mean high water springs
MHWN – mean high water neaps
MLWN – mean low water neaps
MLWS – mean low water springs
H – highest for year
L – lowest for year
MSR – mean spring range
MNR – mean neap range
Measurement devices
Tide gauge systemsFull-tide bubbler
Half-tide bubbler
Direct pressure transducer
Tide gauges
Ott pneumatic gauge
Munro float gauge
Wellhead float gauge
Lea float gauge
Instruments
DATARING logger
Datum probe