Temperature
Cool by day, brisk at night.
Opatija is usually most comfortable from May to August. Typical daytime highs range from 48–82°F across the year. Rain is frequent in many months.

Cool by day, brisk at night.
Rain is frequent. About 15 wet days, the highest monthly average.
Cloudier spells limit sunshine.
In November, afternoons feel about 51° and nights feel near 46°.
Mostly cloudy skies this month.
Calm winds are typical in November.
November late afternoons are around 55°F, easing to about 53°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 48 | 40 | 6.0 | 12 | 5.8 | 79 | 55 |
| Feb | 50 | 40 | 5.7 | 11 | 7.3 | 76 | 53 |
| Mar | 55 | 45 | 5.7 | 12 | 9.1 | 74 | 53 |
| Apr | 62 | 51 | 5.2 | 12 | 10.5 | 74 | 57 |
| May | 70 | 59 | 5.5 | 13 | 11.9 | 75 | 65 |
| Jun | 78 | 67 | 3.9 | 10 | 13.0 | 73 | 73 |
| Jul | 82 | 70 | 4.0 | 11 | 13.3 | 72 | 77 |
| Aug | 82 | 70 | 4.5 | 10 | 12.4 | 73 | 78 |
| Sep | 73 | 63 | 8.8 | 12 | 10.0 | 77 | 74 |
| Oct | 65 | 56 | 9.7 | 14 | 8.1 | 81 | 68 |
| Nov | 57 | 49 | 10.7 | 15 | 6.1 | 81 | 64 |
| Dec | 50 | 42 | 7.3 | 12 | 5.4 | 80 | 59 |
Similar climates
Want a side-by-side climate view? Compare Opatija with Alghero.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 26, 2026
Data & methodology