Newlyn tide gauge site

The Tidal Observatory is located at the end of South Pier, Newlyn next to the lighthouse, and the pressure points are located on the seaward side of the pier behind the lighthouse.
Click here to see a map of the site in a separate window.

Tide gauge location

Within the Tidal Observatory is a stilling well with a Munro float gauge and a pneumatic bubbler system supplying one full tide and one mid-tide pressure point.

Tide gauge location (aerial view) Tide gauge location Both pressure lines and the Munro gauge potentiometer output are monitored by the POL data logger. Set within the floor of the Observatory is the fundamental bench mark for the UK Geodetic Network.

Click here for information about the significance of the Tidal Observatory.

External users

Sea level pressures and/or elevations from this site are supplied to the following authority:

  • Environment Agency, South West Region

Site history

1915 – Cary Porter gauge operated by the Ordnance Survey
1983 – DATARING system with full-tide pressure point
1983 – Cary Porter gauge removed
1983 – Munro float gauge installed
1996 – Mid-tide pressure point installed
2001 – POL data logger installed

Latitude50° 6.18'N
Longitude5° 32.57'W
Grid refSW 4676 2856
Earliest data1915
Tidal levels
HAT6.13 m
LAT0.18 m
MHWS5.54 m
MHWN4.34 m
MLWN2.01 m
MLWS0.80 m
H for 2024 6.10 m
L for 2024 0.22 m
H for 2025 5.98 m
L for 2025 0.31 m
MSR4.74 m
MNR2.33 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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