Weymouth tide gauge site

The Tide Gauge building is located on Commercial Pier adjacent to the ferry terminal. The pressure points are located on the pier wall directly in front of the Tide Gauge building.
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Tide gauge location

The GRP building houses the Tide Gauge equipment which consists of a POL data logger monitoring both pneumatic bubbler systems, and an Ott pneumatic chart recorder. The pressure points are mounted on steelwork which is attached to the pier wall.

Tide gauge location 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:

  • Weymouth Harbour

Site history

1990 – Two full tide pressure points installed and connected to an Ott chart recorder
1991 – DATARING data logger installed
2001 – POL data logger installed

Latitude50° 36.51'N
Longitude2° 26.876'W
Grid refSY 6840 7885
Earliest data1990
Tidal levels
HAT2.60 m
LAT-0.30 m
MHWS1.40 m
MHWN1.21 m
MLWN0.84 m
MLWS0.20 m
H for 2024 2.60 m
L for 2024 -0.30 m
H for 2025 2.49 m
L for 2025 -0.21 m
MSR1.2 m
MNR0.37 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

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