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Warmest sea in Ireland in December

169 coastal locations in Ireland ranked by their typical December sea temperature. Region-wide average in December: 10.5°C. The top of the list is where to find the warmest swimming this month.

Warmest in December

Kilmore Quay

11.3°C December mean in Ireland

Regional December average

10.5°C

across all 169 coastal locations in Ireland

Vs annual mean

-1.7°C

below the year-round regional average

What the Ireland sea feels like in December

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

Ireland monthly average 9.0°C to 16.0°C
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D
  • 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 December fits in the year

December 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 December mean, useful for trip planning weeks or months ahead.

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 Ireland locations in December

Sorted by the typical December mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# Location December mean
1 Kilmore Quay 11.3°C
2 Rosslare Strand 11.2°C
3 Wexford 11.2°C
4 Duncannon 11.2°C
5 Dunmore East 11.2°C
6 Carnsore Point County Wexford 11.1°C
7 Ardmore 11.0°C
8 Tramore 11.0°C
9 Kish Bank County Dublin 10.9°C
10 Youghal 10.9°C
11 Great Saltee County Wexford 10.9°C
12 Clonea 10.9°C
13 Dungarvan 10.9°C
14 Garryvoe 10.8°C
15 Dingle 10.8°C
16 Garretstown Beach 10.8°C
17 Kilbrittain 10.8°C
18 Kinsale 10.8°C
19 Bantry 10.8°C
20 Cromane Point County Kerry 10.8°C
21 Inch Beach 10.8°C
22 Ballycotton County Cork 10.8°C
23 Clonakilty 10.8°C
24 Ballyheige County Kerry 10.8°C
25 Kilbaha Bay County Clare 10.8°C
Show 25 more ▸
26 Schull 10.8°C
27 Carrigaline 10.8°C
28 Cobh 10.8°C
29 Cork 10.8°C
30 Myrtleville 10.8°C
31 Passage West 10.8°C
32 Baginbun Head County Wexford 10.8°C
33 Castletownshend County Cork 10.8°C
34 Cheekpoint County Waterford 10.8°C
35 Fenit 10.8°C
36 Fethard-on-Sea County Wexford 10.8°C
37 Kerry 10.8°C
38 Kilmokea Point County Wexford 10.8°C
39 Loch Garman County Wexford 10.8°C
40 New Ross County Wexford 10.8°C
41 Rosslare Europort County Wexford 10.8°C
42 Tralee 10.8°C
43 Wexford Harbour County Wexford 10.8°C
44 Smerwick Harbour County Kerry 10.8°C
45 Baltimore County Cork 10.7°C
46 Knights Town County Kerry 10.7°C
47 Knightstown Contae Chiarraí 10.7°C
48 Portmagee County Kerry 10.7°C
49 Waterford 10.7°C
50 Crookhaven County Cork 10.7°C

Coldest 10 in Ireland in December

Same data the other way. Helpful if you want to know which Ireland coasts to avoid for swimming in December.

# Location December mean
1 Blackrock County Louth 9.4°C
2 Soldiers Point County Louth 9.4°C
3 Drogheda 9.7°C
4 Dunany Point County Louth 10.0°C
5 Greenore County Louth 10.0°C
6 Bundoran 10.1°C
7 Mullaghmore 10.1°C
8 Sligo 10.1°C
9 Donegal 10.1°C
10 Killybegs 10.1°C

More on this region