Poreč weather: the best time to visit, month by month

Climate, not a forecast: where the numbers come from

DHMZ (Državni hidrometeorološki zavod) describes the climate of a place with 30-year averages, known as climate normals. Poreč is not on the list of stations for which DHMZ publishes climate normals online. We therefore use the Rovinj station, which lies south of Poreč on the same west coast of Istria. Air temperature, rain and sunshine there are averages for 1971 to 2000. The sea temperature is an average for 1961 to 1990; the table has no newer sea values.

Poreč has its own climate station, 15 m above sea level, with measurements since 1981. A report by the City of Poreč with DHMZ gives these average highs and lows for 1981 to 2010: 27.1 and 16.9 °C in summer, 17.0 and 7.8 °C in spring, 19.2 and 10.5 °C in autumn, 9.7 and 1.8 °C in winter. According to the same report, summer highs rose by about 0.7 °C per decade between 1981 and 2015, so today's summers tend to be warmer than the figures below. DHMZ measures current sea temperatures daily, in Istria at the Pula and Rovinj-Sv. Ivan stations.

Poreč weather month by month

Rovinj station, per month: average daytime high and night-time low, average sea temperature, days with at least 1 mm of rain and hours of sunshine per day.

• January: 9.6 °C by day, 1.8 °C at night, sea 10.0 °C, 6.6 rain days, 3.3 hours of sun
• February: 10.6 °C by day, 1.6 °C at night, sea 9.3 °C, 5.7 rain days, 4.9 hours of sun
• March: 13.4 °C by day, 4.0 °C at night, sea 9.9 °C, 6.1 rain days, 5.7 hours of sun
• April: 16.7 °C by day, 7.2 °C at night, sea 12.3 °C, 7.3 rain days, 6.7 hours of sun
• May: 21.7 °C by day, 11.6 °C at night, sea 16.7 °C, 7.5 rain days, 8.7 hours of sun
• June: 25.4 °C by day, 14.9 °C at night, sea 21.0 °C, 6.9 rain days, 9.6 hours of sun
• July: 28.5 °C by day, 17.2 °C at night, sea 23.7 °C, 4.1 rain days, 10.6 hours of sun
• August: 28.7 °C by day, 17.2 °C at night, sea 24.2 °C, 5.0 rain days, 9.8 hours of sun
• September: 24.6 °C by day, 14.0 °C at night, sea 22.0 °C, 6.5 rain days, 7.7 hours of sun
• October: 19.9 °C by day, 10.2 °C at night, sea 18.6 °C, 7.7 rain days, 5.7 hours of sun
• November: 14.4 °C by day, 6.0 °C at night, sea 15.3 °C, 8.1 rain days, 3.6 hours of sun
• December: 10.8 °C by day, 3.2 °C at night, sea 12.1 °C, 7.1 rain days, 3.0 hours of sun

July and August: the hottest and busiest months

July and August are the warmest months. In Rovinj the temperature then reaches 30 °C or more on about 10 to 12 days a month; the highest value of the 1971 to 2000 series was 37.1 °C in August. At night it stays at 20 °C or above on almost 5 days a month. July has less rain than any other month, 40.7 mm. The sea is at its warmest, at 23.7 and 24.2 °C. According to the Poreč Tourist Board, the maestral, a breeze blowing from the sea towards the land, brings relief in summer.

It is also the high season: in August 2025 the Poreč Tourist Board counted 847,099 overnight stays, in July 805,939. The three apartments at Villa Matea have air conditioning, and in the evening you can sit in the garden with the barbecue. The nearest beach is about a 10-minute walk away; more in Poreč beaches.

June and September: warm sea, fewer people

In June the average high is 25.4 °C, the sea 21.0 °C, and the sun shines for 9.6 hours a day. In September it is 24.6 °C in the air and 22.0 °C in the sea: the water is warmer than in June, even though the air is slightly cooler.

It is also quieter: in June 2025 the tourist board counted 566,021 overnight stays, about two thirds of August, and in September 463,416, just over half. Outside July and August the Villa Matea apartments also cost less: see the apartments.

May and October: start and end of the swimming season

According to the tourist board, the swimming season in Poreč runs from May to October. The sea averages 16.7 °C in May and 18.6 °C in October, so it is much fresher than in summer. The air reaches 21.7 and 19.9 °C. That suits the old town, a 15 to 20-minute walk from Villa Matea, and day trips without the summer heat: things to do in Poreč.

From October it gets wetter. October and November are the wettest months in Rovinj, with 97.0 and 98.3 mm, and at the Poreč station autumn brings about 300 mm, more rain than any other season. It also gets quieter: in May 2025 the tourist board counted 285,160 overnight stays, in October 143,965. What is on during your stay is listed in the tourist board's events calendar.

November to March: mild, but not for swimming

Winter on the coast stays mild. In January the average high is 9.6 °C, and there is night frost on almost 10 days on average. The sea cools to 9 to 10 °C and is coldest in February. In December the sun shines for only 3.0 hours a day on average.

According to the tourist board, two winds alternate on the Poreč coast all year round: the bura, bringing dry and clear weather, and the jugo, a warm wind with rain. It is too cold for swimming but fine for the old town without crowds: in January 2025 the tourist board counted 21,050 overnight stays.