Opatija Weather in September

Opatija in September averages 22°C (72°F) during the day and 14°C (57°F) at night. September is part of the rainy season, so frequent rainfall is typical.

Rainfall in Opatija in September

Opatija is in the rainy season in September, with rain on around 13 days and an average of 215 mm (8.5 in). Rain during the rainy season here tends to be intense rather than just persistent drizzle. Expect significant downpours.

Temperature in Opatija in September

Daytime temperatures in Opatija reach 22°C (72°F) in September, dropping to 14°C (57°F) at night. The difference between afternoon and evening temperatures is usually noticeable. With lows of 14°C (57°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Opatija in September

There are approximately 202 hours of sunshine this month, despite being the rainy season. Rain often arrives in the late afternoon or evening, keeping mornings and early afternoons sunny. Even during the wet season, it could still be a nice time to visit.

Average water temperature in September

The water temperature is 24°C (75°F), which most people find very comfortable. A good month for swimming and water sports.

Should you favor a climate that's both dry and comfortably warm, May, June, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.