Newport tide gauge site
The tide gauge building is located on the West side of the lock entrance to Newport Docks.
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Tide gauge location
The brick tide gauge building contains the data logging system and a pneumatic bubbler with two full-tide and mid-tide measuring systems.
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 Wales / Asiantaeth yr Amgylchedd Cymru
Site history
1992 – The DATARING system was installed with two full-tide measuring systems
2001 – New POL data logger installed
2006 – Tide gauge measuring system demolished by collapsing fendering
2007 – Temporary bubbler fitted into the stilling well
2007 – New full- and mid-tide bubblers installed
| Location | |
| Latitude | 51° 33'N |
| Longitude | 2° 59.244'W |
| Grid ref | ST 3163 8392 |
| Earliest data | 1993 |
| Tidal levels | |
| HAT | 13.36 m |
| LAT | -0.59 m |
| MHWS | 12.14 m |
| MHWN | 8.97 m |
| MLWN | 3.12 m |
| MLWS | 0.51 m |
| H for 2023 | 13.15 m |
| L for 2023 | -0.50 m |
| H for 2024 | 13.22 m |
| L for 2024 | -0.55 m |
| MSR | 11.63 m |
| MNR | 5.85 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