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Warmest sea in Ireland in April

169 coastal locations in Ireland ranked by their typical April sea temperature. Region-wide average in April: 10.1°C. The top of the list is where to find the warmest swimming this month.

Warmest in April

Baltimore

10.7°C April mean in Ireland

Regional April average

10.1°C

across all 169 coastal locations in Ireland

Vs annual mean

-2.2°C

below the year-round regional average

What the Ireland sea feels like in April

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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  • 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 April fits in the year

April 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 April 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 April

Sorted by the typical April 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 April mean
1 Baltimore County Cork 10.7°C
2 Castletownshend County Cork 10.7°C
3 Crookhaven County Cork 10.7°C
4 Dunmanus County Cork 10.7°C
5 Knights Town County Kerry 10.6°C
6 Knightstown Contae Chiarraí 10.6°C
7 Portmagee County Kerry 10.6°C
8 Ballinskelligs Bay County Kerry 10.6°C
9 Ballyheige County Kerry 10.6°C
10 Cahersiveen County Kerry 10.6°C
11 Cromane Point County Kerry 10.6°C
12 Kilbaha Bay County Clare 10.6°C
13 Waterville County Kerry 10.6°C
14 Ballycotton County Cork 10.6°C
15 Bantry 10.6°C
16 Cork City County Cork 10.6°C
17 Crosshaven County Cork 10.6°C
18 Marino Point County Cork 10.6°C
19 Ringaskiddy County Cork 10.6°C
20 Roberts Cove County Cork 10.6°C
21 Smerwick Harbour County Kerry 10.6°C
22 Garretstown Beach 10.5°C
23 Kilbrittain 10.5°C
24 Kinsale 10.5°C
25 Schull 10.5°C
Show 25 more ▸
26 Clonakilty 10.5°C
27 Courtmacsherry County Cork 10.5°C
28 Clonakilty Bay County Cork 10.5°C
29 Ballycrovane Harbour County Cork 10.5°C
30 Castletown Bearhaven County Cork 10.5°C
31 Castletownbere County Cork 10.5°C
32 Carrigaholt County Clare 10.5°C
33 Tarbert Island County Kerry 10.5°C
34 Coney Island County Clare 10.5°C
35 Foynes Island County Limerick 10.5°C
36 Gaillimh County Galway 10.5°C
37 Galway City County Galway 10.5°C
38 Garryvoe 10.5°C
39 Limerick Harbour County Limerick 10.5°C
40 Liscannor County Clare 10.5°C
41 Mellon Point County Limerick 10.5°C
42 Oranmore County Galway 10.5°C
43 Inishmore (Killeany Bay) County Galway 10.4°C
44 Kilkieran County Galway 10.4°C
45 Ardmore 10.4°C
46 Carrigaline 10.4°C
47 Cobh 10.4°C
48 Cork 10.4°C
49 Derrynane 10.4°C
50 Myrtleville 10.4°C

Coldest 10 in Ireland in April

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

# Location April mean
1 Moville 9.0°C
2 Inishtrahull County Donegal 9.2°C
3 Buncrana 9.3°C
4 Bray 9.3°C
5 Dublin 9.3°C
6 Greystones 9.3°C
7 Blackrock 9.4°C
8 Clogherhead 9.4°C
9 Dalkey 9.4°C
10 Donabate 9.4°C

More on this region