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Coldest sea in Ireland in March

169 coastal locations in Ireland ranked by typical March sea temperature, coldest first. Region-wide average in March: 9.1°C.

Coldest in March

Drogheda

8.1°C March mean in Ireland

Regional March average

9.1°C

across all 169 coastal locations in Ireland

Vs annual mean

-3.2°C

below the year-round regional average

What the Ireland sea feels like in March

This water is very cold and can cause pain. We don't recommend you swim in this temperature for anything other than very short swims of 5 to 10 minutes unless you are a very experienced cold water swimmer.

Ireland monthly average 9.0°C to 16.0°C
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  • Warmest month August 16.0°C
  • Coldest month February 9.0°C
  • Annual mean 12.3°C
  • Months above 20°C 0 of 12

Where March fits in the year

March sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve Ireland month rankings:

Ireland sea temperature map (live)

The map shows today's latest reading at every Ireland location. The list below is based on the typical March mean.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest Ireland locations in March

Sorted by typical March mean from a decade of daily readings, coldest first. Click any place for the full location page.

# Location March mean
1 Drogheda 8.1°C
2 Blackrock County Louth 8.2°C
3 Soldiers Point County Louth 8.2°C
4 Balbriggan 8.3°C
5 Bettystown 8.3°C
6 Carlingford 8.3°C
7 Dundalk 8.3°C
8 Laytown 8.3°C
9 Rush 8.3°C
10 Skerries 8.3°C
11 Dunany Point County Louth 8.4°C
12 Greenore County Louth 8.4°C
13 Blackrock 8.4°C
14 Clogherhead 8.4°C
15 Dalkey 8.4°C
16 Donabate 8.4°C
17 Dun Laoghaire 8.4°C
18 Forty Foot 8.4°C
19 Howth 8.4°C
20 Killiney 8.4°C
21 Malahide 8.4°C
22 Monkstown 8.4°C
23 Portmarnock 8.4°C
24 Portraine 8.4°C
25 Sandycove 8.4°C
Show 25 more ▸
26 Seapoint 8.4°C
27 Bray 8.4°C
28 Dublin 8.4°C
29 Greystones 8.4°C
30 Moville 8.4°C
31 An Ros County Dublin 8.5°C
32 River Boyne Entrance County Meath 8.5°C
33 Howth Harbour County Dublin 8.5°C
34 North Wall (Dublin) County Dublin 8.5°C
35 Donegal 8.6°C
36 Killybegs 8.6°C
37 Buncrana 8.6°C
38 Inishtrahull County Donegal 8.6°C
39 Bundoran 8.6°C
40 Mullaghmore 8.6°C
41 Sligo 8.6°C
42 Arklow 8.7°C
43 Wicklow 8.7°C
44 Kish Bank County Dublin 8.7°C
45 Ballyshannon County Donegal 8.7°C
46 Ballysadare Bay County Sligo 8.8°C
47 Bulbinbeg County Donegal 8.8°C
48 Malin Head County Donegal 8.8°C
49 Trawbreaga Bay County Donegal 8.8°C
50 Loughros More Bay County Donegal 8.8°C

Warmest 10 in Ireland in March

Same data the other way. The warmest spots for the same month.

# Location March mean
1 Castletownshend County Cork 9.9°C
2 Baltimore County Cork 9.9°C
3 Crookhaven County Cork 9.9°C
4 Dunmanus County Cork 9.9°C
5 Bantry 9.8°C
6 Schull 9.8°C
7 Knights Town County Kerry 9.8°C
8 Knightstown Contae Chiarraí 9.8°C
9 Portmagee County Kerry 9.8°C
10 Garretstown Beach 9.8°C

More on this region