Portpatrick tide gauge site

The tide gauge building is mounted over the stilling well in the corner of Portpatrick harbour. The pneumatic pressure points are located directly beneath the building.
Click here to see a map of the site in a separate window.

Tide gauge location

The tide gauge equipment is housed in a GRP building and consists of a pneumatic bubbler system with a single full-tide pressure point mounted on steelwork attached to the stilling well. The Munro float gauge is mounted above the stilling well inside the building. The potentiometer output from the Munro and the pneumatic pressure line are monitored by the POL data logger.

Tide gauge location
Tide gauge cabin 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, levelled to the National Geodetic Network, are supplied to the following authority:

  • Portpatrick Harbour

Site history

1964 – Lea gauge installed
1989 – Lea gauge removed due to site refurbishment
1990 – GRP tide gauge building erected
1990 – DATARING system installed with a single full-tide bubbler, a Munro float gauge and a datum probe
2002 – POL data logger installed

Latitude54° 50.553'N
Longitude5° 7.201'W
Grid refNW 9976 5421
Earliest data1964
Tidal levels
HAT4.32 m
LAT-0.07 m
MHWS3.86 m
MHWN3.19 m
MLWN1.16 m
MLWS0.44 m
H for 2024 4.27 m
L for 2024 -0.07 m
H for 2025 4.20 m
L for 2025 -0.01 m
MSR3.42 m
MNR2.03 m

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

[More about above]