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Opatija weather by month
Check out Opatija weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.
Temperature in Opatija (°C)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max temperature (daytime) | 6 |
6 |
9 |
13 |
18 |
22 |
25 |
25 |
21 |
16 |
11 |
7 |
| Min temperature (night-time) | -3 |
-2 |
0 |
4 |
8 |
11 |
13 |
13 |
10 |
7 |
2 |
-1 |
| Heat & Humidity | 0 |
0 |
0 |
0 |
0 |
0 |
L |
L |
0 |
0 |
0 |
0 |
| Sea temperature | 11 |
10 |
10 |
12 |
17 |
21 |
23 |
24 |
21 |
18 |
15 |
13 |
Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme
Sunshine & UV index in Opatija
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daily hours of sunshine | ||||||||||||
| Daily hours of daylight | 9 |
10 |
12 |
14 |
15 |
16 |
15 |
14 |
13 |
11 |
10 |
9 |
| UV Index (Maximum) | 1 |
2 |
3 |
5 |
7 |
8 |
8 |
7 |
5 |
3 |
2 |
1 |
Rainfall in Opatija
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of days with some rain | 14 |
13 |
14 |
16 |
16 |
16 |
13 |
13 |
13 |
13 |
15 |
14 |
| Average monthly rainfall (mm) | 114 |
101 |
112 |
118 |
110 |
119 |
88 |
117 |
138 |
148 |
178 |
128 |
More about Opatija
Opatija by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Croatia
The climate guide for Croatia (Opatija) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
What's the climate like in Opatija?
Opatija has a temperate climate with hot summers and some rainfall in all months.
Opatija weather in January
Expect daytime maximum temperatures of 6°C in Opatija, Croatia in January based on long-term weather averages. There are 4 hours of sunshine per day on average with 14 days with some rainfall and typically 114 mm of rainfall in the month.
- 6°C max day temperature
6 - 4 hours of sunshine per day
- 14 days with some rainfall
14 - -3°C min night temperature
-3 - 9 hours of daylight per day
9 - No heat & humidity
0 - 114 mm of monthly rainfall
114 - 1 (Low) UV index
1 - 11°C sea temperature
11
Opatija weather in February
Expect daytime maximum temperatures of 6°C in Opatija, Croatia in February based on long-term weather averages. There are 5 hours of sunshine per day on average with 13 days with some rainfall and typically 101 mm of rainfall in the month.
- 6°C max day temperature
6 - 5 hours of sunshine per day
- 13 days with some rainfall
13 - -2°C min night temperature
-2 - 10 hours of daylight per day
10 - No heat & humidity
0 - 101 mm of monthly rainfall
101 - 2 (Low) UV index
2 - 10°C sea temperature
10
Opatija weather in March
Expect daytime maximum temperatures of 9°C in Opatija, Croatia in March based on long-term weather averages. There are 5 hours of sunshine per day on average with 14 days with some rainfall and typically 112 mm of rainfall in the month.
- 9°C max day temperature
9 - 5 hours of sunshine per day
- 14 days with some rainfall
14 - 0°C min night temperature
0 - 12 hours of daylight per day
12 - No heat & humidity
0 - 112 mm of monthly rainfall
112 - 3 (Moderate) UV index
3 - 10°C sea temperature
10
Opatija weather in April
Expect daytime maximum temperatures of 13°C in Opatija, Croatia in April based on long-term weather averages. There are 6 hours of sunshine per day on average with 16 days with some rainfall and typically 118 mm of rainfall in the month.
- 13°C max day temperature
13 - 6 hours of sunshine per day
- 16 days with some rainfall
16 - 4°C min night temperature
4 - 14 hours of daylight per day
14 - No heat & humidity
0 - 118 mm of monthly rainfall
118 - 5 (Moderate) UV index
5 - 12°C sea temperature
12
Opatija weather in May
Expect daytime maximum temperatures of 18°C in Opatija, Croatia in May based on long-term weather averages. There are 8 hours of sunshine per day on average with 16 days with some rainfall and typically 110 mm of rainfall in the month.
- 18°C max day temperature
18 - 8 hours of sunshine per day
- 16 days with some rainfall
16 - 8°C min night temperature
8 - 15 hours of daylight per day
15 - No heat & humidity
0 - 110 mm of monthly rainfall
110 - 7 (High) UV index
7 - 17°C sea temperature
17
Opatija weather in June
Expect daytime maximum temperatures of 22°C in Opatija, Croatia in June based on long-term weather averages. There are 8 hours of sunshine per day on average with 16 days with some rainfall and typically 119 mm of rainfall in the month.
- 22°C max day temperature
22 - 8 hours of sunshine per day
- 16 days with some rainfall
16 - 11°C min night temperature
11 - 16 hours of daylight per day
16 - No heat & humidity
0 - 119 mm of monthly rainfall
119 - 8 (Very High) UV index
8 - 21°C sea temperature
21
Opatija weather in July
Expect daytime maximum temperatures of 25°C in Opatija, Croatia in July based on long-term weather averages. There are 9 hours of sunshine per day on average with 13 days with some rainfall and typically 88 mm of rainfall in the month.
- 25°C max day temperature
25 - 9 hours of sunshine per day
- 13 days with some rainfall
13 - 13°C min night temperature
13 - 15 hours of daylight per day
15 - Low heat & humidity
L - 88 mm of monthly rainfall
88 - 8 (Very High) UV index
8 - 23°C sea temperature
23
Opatija weather in August
Expect daytime maximum temperatures of 25°C in Opatija, Croatia in August based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 117 mm of rainfall in the month.
- 25°C max day temperature
25 - 8 hours of sunshine per day
- 13 days with some rainfall
13 - 13°C min night temperature
13 - 14 hours of daylight per day
14 - Low heat & humidity
L - 117 mm of monthly rainfall
117 - 7 (High) UV index
7 - 24°C sea temperature
24
Opatija weather in September
Expect daytime maximum temperatures of 21°C in Opatija, Croatia in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 13 days with some rainfall and typically 138 mm of rainfall in the month.
- 21°C max day temperature
21 - 7 hours of sunshine per day
- 13 days with some rainfall
13 - 10°C min night temperature
10 - 13 hours of daylight per day
13 - No heat & humidity
0 - 138 mm of monthly rainfall
138 - 5 (Moderate) UV index
5 - 21°C sea temperature
21
Opatija weather in October
Expect daytime maximum temperatures of 16°C in Opatija, Croatia in October based on long-term weather averages. There are 5 hours of sunshine per day on average with 13 days with some rainfall and typically 148 mm of rainfall in the month.
- 16°C max day temperature
16 - 5 hours of sunshine per day
- 13 days with some rainfall
13 - 7°C min night temperature
7 - 11 hours of daylight per day
11 - No heat & humidity
0 - 148 mm of monthly rainfall
148 - 3 (Moderate) UV index
3 - 18°C sea temperature
18
Opatija weather in November
Expect daytime maximum temperatures of 11°C in Opatija, Croatia in November based on long-term weather averages. There are 4 hours of sunshine per day on average with 15 days with some rainfall and typically 178 mm of rainfall in the month.
- 11°C max day temperature
11 - 4 hours of sunshine per day
- 15 days with some rainfall
15 - 2°C min night temperature
2 - 10 hours of daylight per day
10 - No heat & humidity
0 - 178 mm of monthly rainfall
178 - 2 (Low) UV index
2 - 15°C sea temperature
15
Opatija weather in December
Expect daytime maximum temperatures of 7°C in Opatija, Croatia in December based on long-term weather averages. There are 3 hours of sunshine per day on average with 14 days with some rainfall and typically 128 mm of rainfall in the month.
- 7°C max day temperature
7 - 3 hours of sunshine per day
- 14 days with some rainfall
14 - -1°C min night temperature
-1 - 9 hours of daylight per day
9 - No heat & humidity
0 - 128 mm of monthly rainfall
128 - 1 (Low) UV index
1 - 13°C sea temperature
13
More about Opatija
Opatija by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Croatia
- Explore latest special offers & online deals from TUI
- Free child places & £0 deposits with direct debit available
- Book summer & winter sun holidays in 2026/2027
The climate guide for Croatia (Opatija) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Compare Opatija weather with the UK
The weather chart below compares the average monthly maximum daytime temperature for Opatija, Croatia and the UK (London).
Maximum daytime temperature (°C)
Metric (°C / mm) | Imperial (°F / inches)
More about Croatia
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