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Warmest sea in Ireland in January

169 coastal locations in Ireland ranked by their typical January sea temperature. Region-wide average in January: 9.4°C. The top of the list is where to find the warmest swimming this month.

Warmest in January

Schull

10.1°C January mean in Ireland

Regional January average

9.4°C

across all 169 coastal locations in Ireland

Vs annual mean

-2.9°C

below the year-round regional average

What the Ireland sea feels like in January

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 January fits in the year

January 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 January 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 January

Sorted by the typical January 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 January mean
1 Schull 10.1°C
2 Bantry 10.1°C
3 Baltimore County Cork 10.1°C
4 Castletownshend County Cork 10.1°C
5 Crookhaven County Cork 10.1°C
6 Dunmanus County Cork 10.1°C
7 Garretstown Beach 10.1°C
8 Kilbrittain 10.1°C
9 Kinsale 10.1°C
10 Ardmore 10.1°C
11 Kilmore Quay 10.1°C
12 Clonakilty 10.0°C
13 Derrynane 10.0°C
14 Youghal 10.0°C
15 Garryvoe 10.0°C
16 Duncannon 9.9°C
17 Dunmore East 9.9°C
18 Ballinskelligs Bay County Kerry 9.9°C
19 Cahersiveen County Kerry 9.9°C
20 Carrigaline 9.9°C
21 Cobh 9.9°C
22 Cork 9.9°C
23 Myrtleville 9.9°C
24 Passage West 9.9°C
25 Waterville County Kerry 9.9°C
Show 25 more ▸
26 Ballycotton County Cork 9.9°C
27 Knights Town County Kerry 9.9°C
28 Knightstown Contae Chiarraí 9.9°C
29 Portmagee County Kerry 9.9°C
30 Glengarriff 9.9°C
31 Kenmare 9.9°C
32 Dingle 9.8°C
33 Tramore 9.8°C
34 Cork City County Cork 9.8°C
35 Crosshaven County Cork 9.8°C
36 Marino Point County Cork 9.8°C
37 Ringaskiddy County Cork 9.8°C
38 Roberts Cove County Cork 9.8°C
39 Clonea 9.8°C
40 Dungarvan 9.8°C
41 Smerwick Harbour County Kerry 9.8°C
42 Rosslare Strand 9.8°C
43 Wexford 9.8°C
44 Ballycrovane Harbour County Cork 9.8°C
45 Castletown Bearhaven County Cork 9.8°C
46 Castletownbere County Cork 9.8°C
47 Cromane Point County Kerry 9.8°C
48 Inch Beach 9.8°C
49 Carnsore Point County Wexford 9.8°C
50 Courtmacsherry County Cork 9.8°C

Coldest 10 in Ireland in January

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

# Location January mean
1 Blackrock County Louth 7.9°C
2 Soldiers Point County Louth 7.9°C
3 Drogheda 8.3°C
4 Dunany Point County Louth 8.5°C
5 Greenore County Louth 8.5°C
6 Balbriggan 8.8°C
7 Bettystown 8.8°C
8 Carlingford 8.8°C
9 Dundalk 8.8°C
10 Laytown 8.8°C

More on this region