Ullapool tide gauge site

The tide gauge building is located on the main fish quay in Ullapool harbour.
Click here to see a map of the site in a separate window.

Tide gauge location

The GRP tide gauge building contains a Munro IH40 tide gauge and a pneumatic bubbler system with full-tide and mid-tide sensors. The pressure points are located directly below the tide gauge building.

The tide gauge is levelled to the tide gauge bench mark supported by Ordnance Survey auxiliary marks.

External users

There are currently no external users.

Site history

1976 – A Lea gauge was operational at the site
1981 – A bigger wooden tide gauge building was erected and a Munro IH40 was installed
1987 – The DATARING system was installed with a full-tide bubbler and a potentiometer attached to the Munro gauge
1993 – A new GRP building was erected at the site; a mid-tide bubbler was also installed
2003 – POL data logger installed
2005 – Pressure point buried in silt; the POL diving team installed new steelwork and lifted the pressure point clear of the mud

Location
Latitude57° 53.715'N
Longitude5° 9.483'W
Grid refNH 1292 9391
Earliest data1966
Tidal levels 2008 to 2026
HAT5.87 m
LAT0.03 m
MHWS5.21 m
MHWN3.98 m
MLWN2.18 m
MLWS0.76 m
H for 2017 5.63 m
L for 2017 0.18 m
H for 2018 5.69 m
L for 2018 0.24 m
MSR4.45 m
MNR1.8 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

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