Portoroz lies on the Slovenian Coast and enjoys a climate that is quite different from other parts of Slovenia. Visitors can expect Mediterranean-style weather in the summer, with plenty of sunshine and high temperatures, as well as mild winters. Indeed, Portoroz’s favourable climate and sunny weather has attracted visitors since the end of the 19th century, when Portoroz was officially declared a health resort.
When to go – the best time to visit Portoroz
The seasons in Portoroz are spring (March to May), summer (June to September), autumn (October and November), and winter (December to February). You could visit any time between May and October and enjoy a pleasant climate, but to be sure to miss the bulk of the rain and cold, avoid November to March. May and September have some of the nicest weather and also smaller crowds, and hotels at this time are generally not full either.
The summer months in Portoroz are mostly hot and dry, with up to 11 hours of sunshine a day. In July and August, the average daytime temperature is a warm 26°C. Even at nighttime, temperatures usually remain around a comfortable 20°C, making it possible to enjoy dining outside in the evening. Hot temperatures are usually tempered by a cooling summer breeze, making the climate feel quite comfortable. However, the odd summer thunderstorm can sometimes break up the sunshine during the summer.
Autumn weather starts relatively late in Portoroz. In October, temperatures can remain as high as 20°C. It is during November that weather starts to turn more autumnal, with cooler temperatures during both the day and night.
The winter weather and climate in Portoroz is quite mild compared to other parts of Slovenia and frost and snow are experienced very infrequently. Look out for the bora wind, which is a strong wind that brings blustery and rather cold weather to the town. Temperatures in Portoroz tend to stay between 4°C and 8°C during the winter months.
Springtime in Portoroz brings with it a relatively mild climate. From May onwards, temperatures can reach around 20°C, which means that it is sometimes mild enough for visitors to be able to comfortably swim in the sea.
PORTOROZ YEARLY WEATHER SUMMARY
What’s the best time to travel to Portoroz in Slovenia? Here are some facts:
– The months May, June, July, August, September and October have a nice average temperature.
– July is the warmest month with an average high of 28,8 °C and an average low of 16,9 °C.
– July is also the month with the most sunshine, with 11 hours per day.
– January is the coolest month with an average high of 8,9 °C and an average low of 0,7 °C.
– September is the wettest month with an average of 118 millimeters of precipitation.
– December and January are the most cloudy months with an average of 12 mostly cloudy days.
– July is the driest month with an average of 56 millimeters of rainfall.
– January is the month with the most snowfall, with a little over 3 centimetres on average.
For more specific information about the climate of Portoroz, Slovenia, please take a look at the graphs shown below.
A climate graph for Portoroz, Slovenia showing mean daily maximum and minimum temperature for a month and average monthly precipitation (rain/snow).
Graph showing average monthly hours of sunshine and average monthly number of cloudy days for Portoroz, Slovenia.
Graph showing average monthly number of days with precipitation, average monthly number of days with snow cover and average monthly snowfall (in cm) for Portoroz, Slovenia.
Graph showing average monthly number of hot and cold days for Portoroz, Slovenia.
Summers in Portoroz are hot and mostly sunny, with average daytime temperatures between 23°C and 30°C, but sometimes quite higher, 35°C or more. Image by Wolfgang / CC BY-ND 2.0
 Portoroz (Italian: Portorose, literally ‘Port of Roses’) is the most important tourist centre on the Slovenian coast with beneficial Mediterranean climate that invigorates you and makes you want to come back for more. Portoroz, together with its surroundings, has always been associated with health and spa treatments. The beneficial effects of sea water and salt on human health were known here as early as the 13th century. |
| The accommodation options in Portoroz can be divided into five main categories: hotels, guest houses, B&Bs, apartments and hostels. |
 Portoroz is the most important tourist centre on the Slovenian coast and has over 25 hotels which cater to every taste and budget. Find out which are the ones that we recommend and why. |
 Portoroz guest houses are a fun, economical stay. While guest houses aren't fancy, most are waterfront and offer good value for money if you want a house-like setting. |
 Apartments are a great option when you are staying in Portoroz, Slovenia. You can cook your own meals, do your own laundry and enjoy the feeling of having your own space while on holiday. |
 Portoroz bed and breakfasts are excellent accommodation options when it comes to staying in this vibrant seaside resort in Slovenia. Portoroz B&Bs are usually owned by individuals, who take a more hands-on approach to managing their properties and strive to ensure that their guests are content. |
 Portoroz hostels are a low-budget accommodation shared among travelers and backpackers. Portoroz hostels tend to lend to more interaction, cost much less than a hotel, but do not provide the privacy or personal service found at a hotel, B&B or guest house. |