World Resorts Ireland Killarney Weather

Killarney Sea Temperature in December

Average sea water temperature in December:
+50.1°F
Minimum sea water temperature in December: 52.2°F
Maximum sea water temperature in December: 47.3°F

Daily sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 50.6°F. The highest and lowest sea temperatures during the month were 51.1°F and 50.2°F.

Monthly sea water temperature in Killarney, °F

Which Ireland resorts have warmest sea in December?

Place name December 2025 December 2024
Cork 51.2°F 50.9°F
Killarney 50.6°F 50.8°F
Dublin 49.5°F 48.9°F
Limerick 47.3°F 48.8°F

Best time for vacation in Killarney

Sunniest months:
April 5 days
May 4 days
March 4 days
Warmest months:
July 64.5 °F
August 64.0 °F
June 62.0 °F
Warmest sea temp:
August 61.2 °F
July 60.7 °F
September 59.0 °F
Coldest months:
January 45.5 °F
December 47.0 °F
February 47.1 °F
Rainiest months:
December 10 days
January 9 days
February 8 days
Windiest months:
February 11.8 mph
December 11.3 mph
January 10.3 mph

Killarney on a weather map

Current weather
20:28
Killarney
+36°F
NW 6 mph
Feels like: +30°F
Precip.: 0%
Places in Ireland:
Name
°F
Dublin
+36°F
Killarney
+36°F
Cork
+39°F
Limerick
+36°F
24 Hours Forecast
Killarney
Local time: 20:28
December 16, tuesday
2100
36°F
NW
6 mph
December 17, wednesday
0000
43°F
N
12 mph
0300
45°F
N
14 mph
0600
46°F
N
12 mph
0900
48°F
N
7 mph
1200
50°F
NE
3 mph
1500
48°F
E
5 mph
1800
41°F
N
6 mph
Units of measurement: °C / °F