Warmest sea in Ireland in March

169 coastal locations in Ireland ranked by their typical March sea temperature. Region-wide average in March: 9.1°C. The top of the list is where to find the warmest swimming this month.

Warmest in March

Castletownshend

9.9°C March mean in Ireland

Regional March average

9.1°C

across all 169 coastal locations in Ireland

Vs annual mean

-3.2°C

below the year-round regional average

What the Ireland sea feels like in March

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

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 March fits in the year

March 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 March 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 March

Sorted by the typical March 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	Country	March mean
1	Castletownshend County Cork	Ireland	9.9°C
2	Baltimore County Cork	Ireland	9.9°C
3	Crookhaven County Cork	Ireland	9.9°C
4	Dunmanus County Cork	Ireland	9.9°C
5	Bantry	Ireland	9.8°C
6	Schull	Ireland	9.8°C
7	Knights Town County Kerry	Ireland	9.8°C
8	Knightstown Contae Chiarraí	Ireland	9.8°C
9	Portmagee County Kerry	Ireland	9.8°C
10	Garretstown Beach	Ireland	9.8°C
11	Kilbrittain	Ireland	9.8°C
12	Kinsale	Ireland	9.8°C
13	Clonakilty	Ireland	9.8°C
14	Ballinskelligs Bay County Kerry	Ireland	9.8°C
15	Cahersiveen County Kerry	Ireland	9.8°C
16	Waterville County Kerry	Ireland	9.8°C
17	Ballycotton County Cork	Ireland	9.7°C
18	Cork City County Cork	Ireland	9.7°C
19	Crosshaven County Cork	Ireland	9.7°C
20	Marino Point County Cork	Ireland	9.7°C
21	Ringaskiddy County Cork	Ireland	9.7°C
22	Roberts Cove County Cork	Ireland	9.7°C
23	Derrynane	Ireland	9.7°C
24	Smerwick Harbour County Kerry	Ireland	9.7°C
25	Courtmacsherry County Cork	Ireland	9.6°C

Show 25 more ▸

26	Garryvoe	Ireland	9.6°C
27	Ardmore	Ireland	9.6°C
28	Ballycrovane Harbour County Cork	Ireland	9.6°C
29	Castletown Bearhaven County Cork	Ireland	9.6°C
30	Castletownbere County Cork	Ireland	9.6°C
31	Clonakilty Bay County Cork	Ireland	9.6°C
32	Carrigaline	Ireland	9.6°C
33	Cobh	Ireland	9.6°C
34	Cork	Ireland	9.6°C
35	Myrtleville	Ireland	9.6°C
36	Passage West	Ireland	9.6°C
37	Youghal	Ireland	9.6°C
38	Cromane Point County Kerry	Ireland	9.6°C
39	Dingle	Ireland	9.5°C
40	Glengarriff	Ireland	9.5°C
41	Kenmare	Ireland	9.5°C
42	Inishgort County Galway	Ireland	9.5°C
43	Blacksod Quay County Mayo	Ireland	9.5°C
44	Ballyglass (Broadhaven) County Mayo	Ireland	9.5°C
45	Ballyheige County Kerry	Ireland	9.5°C
46	Inishbiggle County Mayo	Ireland	9.5°C
47	Kilbaha Bay County Clare	Ireland	9.5°C
48	Inch Beach	Ireland	9.4°C
49	Clonea	Ireland	9.4°C
50	Dungarvan	Ireland	9.4°C

Coldest 10 in Ireland in March

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

#	Location	Country	March mean
1	Drogheda	Ireland	8.1°C
2	Blackrock County Louth	Ireland	8.2°C
3	Soldiers Point County Louth	Ireland	8.2°C
4	Balbriggan	Ireland	8.3°C
5	Bettystown	Ireland	8.3°C
6	Carlingford	Ireland	8.3°C
7	Dundalk	Ireland	8.3°C
8	Laytown	Ireland	8.3°C
9	Rush	Ireland	8.3°C
10	Skerries	Ireland	8.3°C