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Warmest sea in Ireland

169 coastal locations in Ireland ranked by their year-round average sea temperature. The regional average is 12.3°C. The top of the list shows where to find the warmest water in a typical year. The bottom shows the coldest year-round coasts of the region.

Warmest location

Ardmore

12.9°C annual mean in Ireland

Regional average

12.3°C

across all 169 Ireland coastal locations

Warmest month

August

16.0°C region-wide average

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

Month by month across Ireland

Sea temperatures in Ireland swing from 9.0°C in February to 16.0°C in August on average across every coast we track. That spread of 7°C hides much bigger swings at individual locations.

Want a specific month? Pick one for a dedicated ranking:

Ireland sea temperature map

Today's pin colours show the latest daily reading at every Ireland location we track. Pick any pin for the location's full page.

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 warmest locations in Ireland

The warmest coastal locations across all of Ireland, sorted by year-round average. Click any place for its 30-day chart, monthly profile, and 10-year history.

# Location Annual mean
1 Ardmore 12.9°C
2 Ballycotton County Cork 12.8°C
3 Youghal 12.8°C
4 Castletownshend County Cork 12.8°C
5 Garretstown Beach 12.8°C
6 Kilbrittain 12.8°C
7 Kinsale 12.8°C
8 Garryvoe 12.8°C
9 Baltimore County Cork 12.8°C
10 Clonakilty 12.8°C
11 Cork City County Cork 12.7°C
12 Crosshaven County Cork 12.7°C
13 Marino Point County Cork 12.7°C
14 Ringaskiddy County Cork 12.7°C
15 Roberts Cove County Cork 12.7°C
16 Carrigaline 12.7°C
17 Clonea 12.7°C
18 Cobh 12.7°C
19 Cork 12.7°C
20 Crookhaven County Cork 12.7°C
21 Dungarvan 12.7°C
22 Dunmanus County Cork 12.7°C
23 Myrtleville 12.7°C
24 Passage West 12.7°C
25 Bantry 12.7°C
Show 25 more ▸
26 Courtmacsherry County Cork 12.7°C
27 Tramore 12.7°C
28 Ballyheige County Kerry 12.6°C
29 Kilbaha Bay County Clare 12.6°C
30 Schull 12.6°C
31 Clonakilty Bay County Cork 12.6°C
32 Duncannon 12.6°C
33 Dunmore East 12.6°C
34 Kilmore Quay 12.6°C
35 Carrigaholt County Clare 12.6°C
36 Tarbert Island County Kerry 12.6°C
37 Cromane Point County Kerry 12.6°C
38 Fenit 12.5°C
39 Kerry 12.5°C
40 Tralee 12.5°C
41 Inishmore (Killeany Bay) County Galway 12.5°C
42 Kilkieran County Galway 12.5°C
43 Trá Mhór County Waterford 12.5°C
44 Aran Islands 12.5°C
45 Ballinskelligs Bay County Kerry 12.5°C
46 Ballybunion 12.5°C
47 Cahersiveen County Kerry 12.5°C
48 Kilkee 12.5°C
49 Kilrush 12.5°C
50 Knights Town County Kerry 12.5°C

Coldest 10 in Ireland for contrast

Same data, sorted the other way. Useful if you want to know which Ireland coasts stay coldest year-round.

# Location Annual mean
1 Moville 11.4°C
2 Inishtrahull County Donegal 11.6°C
3 Buncrana 11.6°C
4 Bulbinbeg County Donegal 11.7°C
5 Drogheda 11.7°C
6 Malin Head County Donegal 11.7°C
7 Trawbreaga Bay County Donegal 11.7°C
8 Blackrock County Louth 11.8°C
9 Soldiers Point County Louth 11.8°C
10 Balbriggan 11.8°C

More on this region