Weather in Portorož

Find out what weather awaits you in the city of Portorož right now and in the coming days. Below are up-to-date forecasts and detailed charts to help you better plan your journey.

The climate in Portorož can be described as mild Mediterranean, making this Slovenian resort attractive to visit almost all year round. Thanks to the proximity of the Adriatic Sea, there are no harsh winters with severe frosts here, and the summer heat is tolerated quite easily thanks to the fresh sea breeze. This place is ideal for those looking for comfortable weather without extreme temperature fluctuations.

Throughout the year, the seasons change smoothly. Summer here is warm and sunny, with average temperatures in July and August around 24–25°C, creating excellent conditions for beach holidays and walks along the coast. Winter passes mildly: the thermometer rarely drops below 3–4°C even on the coldest nights of January, so snow here is the exception rather than the rule.

Travellers should note that precipitation in Portorož is distributed fairly evenly throughout the year. Even at the height of summer, rainy days are possible, although they usually do not last long. According to statistics, the wettest periods are spring (especially May) and late autumn, so a light umbrella or raincoat in your luggage will not be amiss regardless of the season of your trip.

The temperature regime of Portorož is distinguished by its mildness and the absence of extreme fluctuations, which is characteristic of seaside resorts. The coldest time of the year is January, when the average temperature holds at 5.9°C. Winters pass quietly here: even on the coolest nights of February or December, the thermometer rarely drops below 3-4°C, so frosty weather is a great rarity for this region.

The summer season brings comfortable warmth, reaching its peak in August and July. In these months, the average air temperature is about 24-25°C, and daily highs confidently hold at the 27-28°C mark. Such weather is ideal for relaxation: it is hot enough for beach entertainment, but there is no exhausting heat characteristic of more southern latitudes.

One of the pleasant features of the Portorož climate is the insignificant amplitude of fluctuations between day and night temperatures. Thanks to the moderating influence of the sea, the difference is usually only 3-6 degrees. This means that summer nights remain very warm (about 21°C), allowing you to enjoy long evening walks, while in transitional months, such as May or September, the air cools smoothly, maintaining comfort.

Precipitation in Portorož is distributed quite unevenly throughout the year, however, there is no pronounced season of torrential rains here. The driest and most stable period is mid-summer, making it the ideal time for a beach holiday. In July, the minimum amount of rainfall is recorded with only about 7 rainy days, and August is only slightly behind it in these figures.

Late spring and autumn are considered the wettest periods. Travellers should take into account that in May it rains most often — statistics show up to 15 days with precipitation in this month. In autumn, especially in September and November, the greatest volume of falling moisture is observed, although the number of inclement days may be slightly less than at the end of spring.

In winter, Portorož maintains moderate humidity. Thanks to the mild climate of the Adriatic, the temperature here rarely drops to freezing values, so precipitation falls mainly in the form of rain. Snowfalls on the coast are an extremely rare phenomenon. In December and January, one should expect about 10–12 rainy days per month.

When packing for Portorož in summer, opt for light and breathable clothing, as from June to August the air temperature often rises to 27°C. Be sure to put swimwear, sunglasses, and reliable sunscreen in your suitcase to enjoy a beach holiday without the risk of getting sunburnt. Evenings by the sea can bring pleasant coolness, so a light cardigan or shawl for the shoulders will be very useful for walks along the embankment.

In the off-season, especially in May and November, the weather becomes more capricious and humid: the number of rainy days increases to 13–15 per month. For spring and autumn trips, the principle of layering is ideal: a combination of T-shirts, sweaters, and a light jacket will allow you to quickly adapt to temperature changes. Do not forget to take a compact umbrella or a high-quality raincoat, as well as waterproof shoes, to comfortably explore the city even in cloudy weather.

Winter in this region of Slovenia is mild, but quite cool, with an average temperature of about 6–7°C. If your trip falls on the period from December to February, you will need a warm, preferably windproof jacket, a scarf, and closed shoes, as the sea wind can intensify the feeling of cold. At any time of the year, we recommend choosing comfortable flat shoes, as Portorož and its surroundings are conducive to long walks.