Elevation of Portmarnock, Dublin, Ireland

Portmarnock, Dublin, Ireland is 3 m (10 ft) above sea level.

Portmarnock's height from sea level is 3 metres, or 10 feet. GeoNames reads 4 m at the same point (SRTM); Wikidata records 3 m.

Ground within 4 km

0 m – 34 m

Mean 9 m across the 8.1 km square centred on the town, 34 m from its lowest cell to its highest.

Rank by elevation

20th of 22

among the towns of Dublin, and 680th of 692 in Ireland.

Nearest town

Kinsealy-Drinan

2.4 km to the W, at 16 m, 13 m higher.

Cross-section through Portmarnock

Ground elevation along two lines through the town, 22.9 km end to end, one cell (about 1 km) per step. The red dot is Portmarnock; the vertical scale is the same on both.

West to east: from 67 m at 11 km west to 0 m at 11 km east.

North to south: from 44 m at 11 km north to 10 m at 11 km south.

Shaded relief of the 48 km around Portmarnock, drawn from the GMTED2010 grid — Relief, 48 km across, north up; the ring marks the town.

Shading is a north-west light over the grid's own slopes. Colour follows elevation: sea level and below, 0–200 m, 500 m, 1,000 m, 2,000 m, 3,500 m, 5,000 m and above.

Towns near Portmarnock

Town	Distance	Direction	Elevation	Compared
Kinsealy-Drinan	2.4 km	W	16 m (52 ft)	+13 m
Malahide	3.9 km	N	3 m (10 ft)	same
Swords	6.7 km	NW	26 m (85 ft)	+23 m
Donabate	7.8 km	N	11 m (36 ft)	+8 m
Portrane	8.6 km	N	4 m (13 ft)	+1 m

Peaks and passes near Portmarnock

Glendoo Mountain, peak at 585 m (1,919 ft), 23.9 km to the SW — 582 m above the town.
Cnoc na gCon, hill at 555 m (1,821 ft), 24.9 km to the S — 552 m above the town.
Prince William's Seat, peak at 554 m (1,818 ft), 24.9 km to the S — 551 m above the town.

Summit heights from GeoNames (CC BY 4.0), within 25 km; only summits higher than the town are listed.

Where Portmarnock is

Latitude 53.4179938, longitude -6.1424312. Open the map here to read the elevation of any point around the town.

Put this on your site

<a href="https://www.altitude-maps.com/city/100_570,Portmarnock,Dublin,Ireland"><img src="https://www.altitude-maps.com/embed/100_570.svg" width="240" height="60" alt="Portmarnock elevation: 3 m (10 ft) above sea level"></a>

A small badge with the town's elevation, linking back here. The number updates if the grid reading ever changes.

About this reading

The elevation is the value of the GMTED2010 terrain grid (USGS/NGA, 30 arc-second cells of about 1 km) at Portmarnock's recorded coordinates. It is the height of the ground in that cell, not of any building; a town on a slope spans several cells, and the range above says how much that matters here. GeoNames' reading of 4 m comes from a finer 90 m SRTM grid at the point it records for the town, which may sit a few hundred metres from ours; the two agreeing to within a few metres is the usual case on flat ground, and a larger gap means the ground is steep. Wikidata's figure is the one its editors cite for the town, often from a survey marker or the town hall.