Mumbles tide gauge site
The tide gauge is located at Mumbles lifeboat station with the full tide pressure points mounted close to the end of the lifeboat
slipway.
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Tide gauge location
The equipment is housed in a heated GRP cabinet within the lifeboat station with the full tide pressure point being mounted on steelwork attached to a concrete leg of the slipway and the mid-tide pressure point mounted on steelwork directly below the lifeboat station. All three pressure lines are monitored by the POL data logger.
The tide gauge is levelled to the tide gauge bench mark suppored by Ordnance Survey auxilary 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
1988 – DATARING system installed with two full-tide bubblers
1993 – Tide gauge removed due to refurbishment of the lifeboat station
1994 – DATARING system installed with two full-tide and a mid-tide bubblers
2001 – POL data logger installed connected to the two full-tide measuring systems
2007 – The mid-tide sensor was connected to the POL data logger
Location | |
Latitude | 51° 34.203'N |
Longitude | 3° 58.534'W |
Grid ref | SS 6319 8753 |
Earliest data | 1988 |
Tidal levels | |
HAT | 10.51 m |
LAT | 0.14 m |
MHWS | 9.54 m |
MHWN | 7.28 m |
MLWN | 3.25 m |
MLWS | 1.08 m |
H for 2023 | 10.36 m |
L for 2023 | 0.35 m |
H for 2024 | 10.43 m |
L for 2024 | 0.17 m |
MSR | 8.46 m |
MNR | 4.03 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