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 50.1°F. The highest and lowest sea temperatures during the month were 51.1°F and 48.7°F.

Monthly sea water temperature in Killarney, °F

Which Ireland resorts have warmest sea in December?

Place name December 2025 December 2024
Cork 50.7°F 50.9°F
Killarney 50.1°F 50.8°F
Dublin 49.5°F 48.9°F
Limerick 46.7°F 48.8°F

Best time for vacation in Killarney

Sunniest months:
April 5 days
May 4 days
March 4 days
Warmest months:
July 64.9 °F
August 64.0 °F
June 62.0 °F
Warmest sea temp:
August 61.4 °F
July 60.9 °F
September 59.0 °F
Coldest months:
January 45.4 °F
December 46.9 °F
February 47.1 °F
Rainiest months:
December 9 days
January 9 days
November 8 days
Windiest months:
February 11.6 mph
December 11.1 mph
January 10.1 mph

Killarney on a weather map

Current weather
10:12
Killarney
+54°F
NE 10 mph
Feels like: +50°F
Precip.: 27%
Places in Ireland:
Name
°F
Dublin
+54°F
Killarney
+54°F
Cork
+54°F
Limerick
+52°F
24 Hours Forecast
Killarney
Local time: 10:12
September 18, friday
1200
57°F
NE
9 mph
1500
61°F
NE
12 mph
1800
59°F
NE
11 mph
2100
57°F
NE
9 mph
September 19, saturday
0000
59°F
NE
9 mph
0300
59°F
E
10 mph
0600
55°F
E
9 mph
0900
55°F
E
7 mph
Units of measurement: °C / °F