16-day forecast — Opatija
Updated every hour
Fri · Today
Clear
+20°
+12°
1.2 mm
Wind19 km/h E
Gusts36 km/h
UV index5 – Moderate
Chance of rain57%
Sunrise06:53
Sunset18:55
Sat · Tomorrow
Clear
+21°
+14°
3%
Wind12 km/h NE
Gusts26 km/h
UV index5 – Moderate
Chance of rain3%
Sunrise06:54
Sunset18:53
Sunday 27/9
Clear
+21°
+15°
3%
Wind12 km/h NE
Gusts25 km/h
UV index5 – Moderate
Chance of rain3%
Sunrise06:56
Sunset18:51
Monday 28/9
Clear
+22°
+16°
3%
Wind13 km/h NE
Gusts26 km/h
UV index5 – Moderate
Chance of rain3%
Sunrise06:57
Sunset18:49
Tuesday 29/9
Clear
+23°
+17°
2%
Wind17 km/h NE
Gusts22 km/h
UV index6 – High
Chance of rain2%
Sunrise06:58
Sunset18:47
Wednesday 30/9
Clear
+22°
+16°
2%
Wind18 km/h NE
Gusts25 km/h
UV index6 – High
Chance of rain2%
Sunrise06:59
Sunset18:45
Thursday 1/10
Clear
+21°
+16°
3%
Wind18 km/h NE
Gusts25 km/h
UV index6 – High
Chance of rain3%
Sunrise07:01
Sunset18:43
Friday 2/10
Clear
+22°
+16°
3%
Wind18 km/h NE
Gusts24 km/h
UV index6 – High
Chance of rain3%
Sunrise07:02
Sunset18:41
Saturday 3/10
Cloudy
+23°
+16°
7%
Wind14 km/h NE
Gusts16 km/h
UV index6 – High
Chance of rain7%
Sunrise07:03
Sunset18:40
Sunday 4/10
Clear
+22°
+16°
4%
Wind13 km/h NE
Gusts14 km/h
UV index6 – High
Chance of rain4%
Sunrise07:04
Sunset18:38
Monday 5/10
Cloudy
+20°
+16°
8%
Wind12 km/h NE
Gusts24 km/h
UV index4 – Moderate
Chance of rain8%
Sunrise07:06
Sunset18:36
Tuesday 6/10
Cloudy
+20°
+17°
13%
Wind9 km/h NE
Gusts27 km/h
UV index5 – Moderate
Chance of rain13%
Sunrise07:07
Sunset18:34
Wednesday 7/10
Showers
+20°
+16°
8.5 mm
Wind8 km/h NE
Gusts18 km/h
UV index4 – Moderate
Chance of rain85%
Sunrise07:08
Sunset18:32
Thursday 8/10
Clear
+21°
+17°
2.5 mm
Wind8 km/h NE
Gusts24 km/h
UV index6 – High
Chance of rain67%
Sunrise07:09
Sunset18:30
Friday 9/10
Showers
+17°
+11°
2.9 mm
Wind17 km/h SE
Gusts28 km/h
UV index3 – Moderate
Chance of rain—
Sunrise07:11
Sunset18:28
Saturday 10/10
Showers
+17°
+11°
7.5 mm
Wind18 km/h E
Gusts27 km/h
UV index3 – Moderate
Chance of rain—
Sunrise07:12
Sunset18:27
About Opatija
Mondäner Kurort an der Kvarner Bucht mit Küstenpromenade.
CountryCroatia
RegionKvarner
ContinentEurope
Time zoneEurope/Zagreb (+02:00)
Latitude45.3380°
Longitude14.3050°
Air qualityFair (EAQI 25)
Climate in Opatija in September
Normals 8 years · best time to visit · Open-MeteoBest time to visit Opatija: May–September. With good weather, September is a recommended month to visit.
| August | September | October | |
|---|---|---|---|
| Average temperature | ▼ 24°C | 20°C | ▼ 15°C |
| Highest temperature | ▼ 29°C | 23°C | ▼ 19°C |
| Lowest temperature | ▼ 20°C | 16°C | ▼ 12°C |
| Sea temperature | ▼ 25,0°C | 23,1°C | ▼ 19,6°C |
| Precipitation | ▲ 94 mm | 217 mm | ▲ 348 mm |
| Days with precipitation | ▲ 7 d | 11 d | ▲ 13 d |
| Humidity | ▲ 61% | 75% | ▲ 80% |
| Sunshine hours per day | ▼ 12,2 h | 9,8 h | ▼ 7,6 h |
| Cloud cover | ▲ 13% | 22% | ▲ 30% |
| UV index (midday) | ▼ 9 | 7 | ▼ 4 |
| Day length | 14:03 | 12:31 | 10:56 |
| Our rating | Good | Good | Acceptable |
Temperature day by day in September mean + moving average
Precipitation day by day in September mm
UV index day by day in September midday value, clear-sky
Climate normals calculated from Open-Meteo (ERA5 archive 8 years, sea temperature Marine API). UV estimated from solar elevation.
Other destinations in Europe
Weather Opatija
Data source
Global weather models — international forecasts
Weather in Opatija (Croatia): current conditions plus a 24-hour and 16-day forecast for planning your trip. Right now on the ground: +12°, clear, wind 12 km/h. Over the next 7 days temperatures range between 12 and 23 °C, with 7 fine days and 1 mm of rain. Climatologically, highs in September are around 23 °C, with a sea temperature of about 23 °C. Best time to visit: usually May–September. Local time (time zone Europe/Zagreb). Data from Open-Meteo and WeatherAPI.