Measurements:
°C
°F
Killarney
42°F
NW 21 mph
Feels like: 32°F
Precip: 100%
World Resorts Ireland Killarney Weather

Killarney Sea Water Temperature

Current Sea Water Temperature:
+46.8°F
Maximum Sea Water Temperature in February: 49.4°F
Minimum Sea Water Temperature in February: 44.8°F
Average water temperature in February: 46.9°F

Sea Water Temperature for the Last 10 Days:

February 17 46.8°F February 12 47.4°F
February 16 46.8°F February 11 47.0°F
February 15 47.2°F February 10 47.0°F
February 14 47.2°F February 09 46.4°F
February 13 47.6°F February 08 46.4°F

When is the Warmest Sea for Killarney?

According to our data for the last three years for Killarney the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Killarney was 64.7°F. The maximum and minimum values were 62.8°F and 66.6°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Killarney was 64.1°F. The maximum and minimum values were 63.0°F and 64.8°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Killarney was 60.8°F. The maximum and minimum values were 58.8°F and 63.6°F respectively.

Best Time to Visit Killarney
The most sunny months:
April 5 days
May 4 days
March 4 days
The most warm months:
July 66.2 °F
August 65.5 °F
June 63.3 °F
Warmest sea temperature:
August 62.4 °F
July 61.8 °F
September 60.0 °F
The most cold months:
January 44.8 °F
December 46.6 °F
February 46.8 °F
The most rainy months:
December 9 days
January 9 days
February 8 days
The most windy months:
February 11 mph
December 11 mph
January 10 mph

Killarney on the Weather Map

Ireland Resorts:
NAME
Cork +42
Dublin +38
Killarney +42
Limerick +38
24 Hours Weather Forecast
Killarney
Local time: 18:54
17 feb, tuesday
2100 42°F
NW
19 mph
18 feb, wednesday
0000 44°F
NW
11 mph
0300 44°F
NW
6 mph
0600 44°F
N
7 mph
0900 44°F
NW
5 mph
1200 46°F
N
4 mph
1500 46°F
E
4 mph
1800 40°F
NE
4 mph