Measurements:
°C
°F
CURRENT WEATHER
15:58
Koper
52°F
NW 2 mph
Feels like: 52°F
Precip: 100%
World Resorts Slovenia Koper Weather

14 Day Weather Forecast

12.17
wed
DAY
52°F
W 2 mph
precip
100%
NIGHT
48°F
N 3 mph
precip
100%
12.18
thu
DAY
54°F
NE 2 mph
precip
66%
NIGHT
46°F
N 2 mph
precip
72%
12.19
fri
DAY
54°F
SE 1 mph
precip
64%
NIGHT
44°F
SW 2 mph
precip
0%
12.20
sat
DAY
56°F
S 2 mph
precip
0%
NIGHT
40°F
W 5 mph
precip
0%
12.21
sun
DAY
52°F
NE 0 mph
precip
0%
NIGHT
44°F
NW 2 mph
precip
77%
12.22
mon
DAY
54°F
W 1 mph
precip
100%
NIGHT
48°F
NW 5 mph
precip
100%
12.23
tue
DAY
54°F
W 6 mph
precip
100%
NIGHT
46°F
W 6 mph
precip
100%
12.24
wed
DAY
56°F
N 3 mph
precip
100%
NIGHT
44°F
W 5 mph
precip
0%
12.25
thu
DAY
50°F
SW 7 mph
precip
100%
NIGHT
42°F
W 4 mph
precip
100%
12.26
fri
DAY
44°F
W 6 mph
precip
76%
NIGHT
38°F
W 6 mph
precip
41%
12.27
sat
DAY
36°F
SW 12 mph
precip
100%
NIGHT
24°F
SW 16 mph
precip
0%
12.28
sun
DAY
32°F
SW 14 mph
precip
0%
NIGHT
24°F
SW 6 mph
precip
0%
12.29
mon
DAY
36°F
SW 3 mph
precip
0%
NIGHT
24°F
W 2 mph
precip
0%
12.30
tue
DAY
38°F
NE 2 mph
precip
0%
NIGHT
28°F
NW 4 mph
precip
0%

Koper Sea Water Temperature in December, °F

Select Year: 2025 2024 2023

The average sea surface temperature in December 2025 for Koper was 56.7°F. The maximum and minimum values were 55.8°F and 57.6°F respectively.

Koper on the Weather Map

Best Time to Visit Koper
The most sunny months:
August 23 days
July 22 days
June 20 days
The most warm months:
August 88.9 °F
July 88.7 °F
June 83.6 °F
Warmest sea temperature:
August 81.5 °F
July 81.2 °F
September 76.5 °F
The most cold months:
January 45.1 °F
December 47.6 °F
February 47.9 °F
The most rainy months:
May 7 days
November 6 days
September 6 days
The most windy months:
March 6 mph
February 6 mph
November 6 mph
more details
24 Hours Weather Forecast
Koper
Local time: 15:58
17 dec, wednesday
1800 52°F
NW
2 mph
2100 46°F
NW
2 mph
18 dec, thursday
0000 48°F
N
3 mph
0300 46°F
N
4 mph
0600 48°F
N
3 mph
0900 50°F
N
2 mph
1200 54°F
NE
2 mph
1500 54°F
NE
1 mph