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Coldest sea in Ireland in August

169 coastal locations in Ireland ranked by typical August sea temperature, coldest first. Region-wide average in August: 16.0°C.

Coldest in August

Moville

14.9°C August mean in Ireland

Regional August average

16.0°C

across all 169 coastal locations in Ireland

Vs annual mean

+3.7°C

above the year-round regional average

What the Ireland sea feels like in August

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

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 August fits in the year

August 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 August 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 August

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

# Location August mean
1 Moville 14.9°C
2 Inishtrahull County Donegal 14.9°C
3 Buncrana 15.1°C
4 Bulbinbeg County Donegal 15.2°C
5 Malin Head County Donegal 15.2°C
6 Trawbreaga Bay County Donegal 15.2°C
7 Belmullet 15.3°C
8 Achill Island 15.4°C
9 Cranford Bay County Donegal 15.4°C
10 Fanad Head County Donegal 15.4°C
11 Rathmullan County Donegal 15.4°C
12 Gweedore County Donegal 15.5°C
13 Inishbofin County Donegal 15.5°C
14 Tory Island County Donegal 15.5°C
15 Ballyglass (Broadhaven) County Mayo 15.5°C
16 Inishbiggle County Mayo 15.5°C
17 Dunfanaghy County Donegal 15.5°C
18 Kish Bank County Dublin 15.5°C
19 Mulroy Bay (Bar) County Donegal 15.5°C
20 Sheep Haven County Donegal 15.5°C
21 Balbriggan 15.5°C
22 Bettystown 15.5°C
23 Bray 15.5°C
24 Carlingford 15.5°C
25 Dublin 15.5°C
Show 25 more ▸
26 Dundalk 15.5°C
27 Greystones 15.5°C
28 Laytown 15.5°C
29 Rush 15.5°C
30 Skerries 15.5°C
31 Blackrock 15.6°C
32 Clogherhead 15.6°C
33 Dalkey 15.6°C
34 Donabate 15.6°C
35 Dun Laoghaire 15.6°C
36 Forty Foot 15.6°C
37 Howth 15.6°C
38 Killiney 15.6°C
39 Malahide 15.6°C
40 Monkstown 15.6°C
41 Portmarnock 15.6°C
42 Portraine 15.6°C
43 Sandycove 15.6°C
44 Seapoint 15.6°C
45 Glengarriff 15.6°C
46 Kenmare 15.6°C
47 Blacksod Quay County Mayo 15.6°C
48 Burtonport County Donegal 15.6°C
49 Rosslare Strand 15.6°C
50 Wexford 15.6°C

Warmest 10 in Ireland in August

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

# Location August mean
1 Ardmore 16.7°C
2 Coney Island County Clare 16.7°C
3 Foynes Island County Limerick 16.7°C
4 Gaillimh County Galway 16.7°C
5 Galway City County Galway 16.7°C
6 Limerick Harbour County Limerick 16.7°C
7 Liscannor County Clare 16.7°C
8 Mellon Point County Limerick 16.7°C
9 Oranmore County Galway 16.7°C
10 Ballycotton County Cork 16.7°C

More on this region