Portrush tide gauge site

The tide gauge equipment is situated in Portrush lifeboat station and the pressure points are mounted close to the end of the lifeboat slipway.

The tide gauge is leveled to the tide gauge bench mark supported by Ordnance Survey of Northern Ireland auxiliary marks.
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Tide gauge location

The equipment is housed in a heated instrument cabinet within the lifeboat station, with the full-tide pressure point mounted on steel work attached to a concrete leg of the slipway, and the mid-tide pressure point being mounted on the sea wall directly below the lifeboat station.

Tide gauge location All three pressure lines are monitored by the POL data logger.

External users

Sea level pressures and/or elevations from this site, levelled to the National Geodetic Network, are supplied to the following authority.

  • Portrush Lifeboat Station

Site history

1993 – Aanderaa Tide Gauge installed
1995 – DATARING system installed with two full-tide and a mid-tide bubblers
1995 – Aanderaa Tide Gauge removed
2001 – POL data logger installed

Latitude55° 12.408'N
Longitude6° 39.408'W
Grid refC 850407 (OSNI)
Earliest data1993
Tidal levels
HAT2.63 m
LAT0.00 m
MHWS2.15 m
MHWN1.62 m
MLWN0.97 m
MLWS0.43 m
H for 2024 2.63 m
L for 2024 0.04 m
H for 2025 2.58 m
L for 2025 0.05 m
MSR1.72 m
MNR0.65 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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