Last updated: August 27, 2025
Portorož, Slovenia, in August, offers a delightful summer experience with temperatures averaging a pleasant 26°C (78°F), peaking at a maximum of 30°C (87°F) during the day. While the nights cool down to a comfortable 17°C (63°F), visitors should expect occasional rainfall, with 58 mm (2.3 in) spread across about 6 days. The relative humidity sits at a moderate 51%, creating a balmy atmosphere perfect for enjoying the picturesque coast and vibrant local culture. Whether basking in the sun or strolling through charming streets, August is a wonderful time to explore this stunning seaside destination.
In August, Portorož, Slovenia, basks in the warmth of summer, with temperatures showcasing a delightful range. The minimum temperature hovers around 17°C (63°F), while the average climbs to a comfortable 26°C (78°F), peaking at a maximum of 30°C (87°F). This month marks one of the hottest periods of the year, following the steady rise in temperatures from the cooler months. As the year transitions from July's peak warmth, August maintains its inviting climate, making it a prime time for visitors seeking sun-soaked adventures along the scenic coast. With pleasant evenings and sunny days, it’s the perfect backdrop for exploring the vibrant culture and stunning landscapes that Portorož offers.
In August, Portorož experiences a notable shift in precipitation patterns, bringing a total of 58 mm (2.3 in) of rain over six days. This amount mirrors that of January and March, indicating a relatively dry spell compared to the wetter months that bookend the summer. As the region transitions into September, precipitation significantly increases to 171 mm (6.7 in), suggesting the onset of a more turbulent weather phase. While August remains comfortably balmy and summers can typically veer towards aridity, the data indicates that conditions are primed for change, setting the stage for the autumn rains that follow.
In August, Portoroz, Slovenia, experiences a notable shift in humidity, dipping to 51%, the lowest point of the year. This decline marks a transition from the more humid months of spring and early summer, where levels hovered between 63% and 73%. As the summer peaks, the air becomes noticeably drier, offering a refreshing escape from the higher humidity levels of previous months. Following August, humidity levels begin to rise again in September to 64%, setting the stage for the return of moister conditions as autumn approaches. This cyclical pattern emphasizes Portoroz's unique seasonal climate, providing both residents and visitors with a charming contrast between the warm, dry summer and the more humid months that follow.
In August, Portoroz, Slovenia, experiences a UV Index of 8, categorizing the sun exposure as very high. With a burn time of just 15 minutes, it's essential to take precautions when enjoying the sunny days of summer. This trend reflects the strong UV intensity typical of the summer months, peaking in June and July with an index of 9. Following August, the UV Index gradually decreases in September to 7, indicating that while summer's end brings slightly less intense sun, protective measures remain crucial for your skin. For a comprehensive overview of UV levels throughout the year, visit Portoroz UV Index.
UV Risk Categories
August in Portorož, Slovenia, bathes in 397 hours of sunshine, making it one of the sunniest months of the year. Following the peak sunlight of July with 430 hours, August marks a slight dip but remains robust, providing ample opportunities for outdoor fun and relaxation. This month stands as a bridge between the vibrant summer months of June and July and the quieter days of autumn that follow. As the sunshine gradually diminishes into September’s 326 hours, August captures the last vibrant days of summer, inviting visitors to savor the warmth before the cooler months set in. Overall, the seasonal trend reveals a steady increase in sunshine from January’s 182 hours to the summer climax, with August maintaining a significant amount of radiant days that beckon both locals and travelers alike.
In August, Portorož, Slovenia, enjoys a delightful 62% chance of sunny weather, making it one of the sunniest months of the year. This trend showcases a steady increase in sunshine probability as the summer progresses, beginning with a modest 31% in January and ascending through the months to the peak in August. It's interesting to note that the likelihood of sunny days dips slightly in September but remains high at 59%, maintaining the allure of late summer. This upward trajectory in sunshine probability emphasizes that August is a prime time for enjoying the beautiful coastline and vibrant local culture in Portorož.
In Portorož, Slovenia, August is characterized by a delightful 14 hours of daylight, gently tapering from the summer peak of June and July. This trend reflects a gradual transition from the vibrant long days of summer towards the shorter daylight hours of autumn. With daylight decreasing from a maximum of 15 hours in July, August still offers plenty of sunshine for both locals and visitors to enjoy the stunning coastal scenery and outdoor activities. As the month progresses, the sunlight slowly yields to the cooler, shorter days of September, marking a shift in the seasonal rhythm of this picturesque seaside town.
In August, Portoroz experiences a pleasant average wind speed of 3.9 m/s (9 mph), adding a gentle breeze to the warm summer days. As summer peaks, the wind is slightly stronger than in the quieter months of June and July, which see lower averages of 3.1 m/s and 3.4 m/s, respectively. This modest uptick in wind speed not only enhances the coastal charm of Portoroz but also signals the gradual shift towards the more invigorating autumn months. September and October bring an increase in wind velocity, with October reaching 5.0 m/s (11 mph), reflecting the seasonal transition that makes autumn an exciting time in this picturesque Slovenian town.
Weather in Portoroz varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Portoroz, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present contrasting weather conditions. In August, temperatures range from a mild 17°C (63°F) to a warm 30°C (87°F), with an average of 26°C (78°F), making it ideal for outdoor activities. Rainfall is relatively low, with 58 mm (2.3 in) over approximately 6 days, and humidity sits at a comfortable 51%. In stark contrast, January experiences much colder temperatures, with a minimum of -3°C (27°F) and a maximum of 13°C (56°F), averaging just 7°C (46°F). Though it receives the same amount of precipitation as August, 58 mm (2.3 in), it has slightly more rainy days at 7, and high humidity levels at 88%, creating a noticeably different atmosphere. For a detailed look at January weather in Portoroz, visit Portoroz weather in January.
August and February present strikingly contrasting weather patterns. In August, temperatures range from a mild 17°C (63°F) at night to a warm average of 26°C (78°F), peaking at a maximum of 30°C (87°F). The month sees relatively low precipitation, with only 58 mm (2.3 in) over about 6 days, and humidity levels sit at a comfortable 51%. In contrast, February is marked by significantly cooler temperatures, swinging from a minimum of -3°C (27°F) to a maximum of just 13°C (56°F), with an average of 8°C (47°F). This chilly month experiences more precipitation, totaling 106 mm (4.2 in) across 11 days, and the humidity rises to a notable 82%. For a deeper look at February's weather, check out Portoroz weather in February.
The weather in August is characterized by warm temperatures, averaging around 26°C (78°F) with a maximum of 30°C (87°F), making it a prime month for outdoor activities. In contrast, March sees much cooler temperatures, with an average of 10°C (50°F) and maximums reaching only 16°C (62°F). Both months experience similar precipitation levels, with August receiving 58 mm (2.3 in) over 6 days and March slightly higher at 57 mm (2.3 in) across 7 days. However, March has a higher humidity rate at 73%, compared to August's 51%, contributing to the overall feeling of chilly dampness during that early spring month. For more detailed information on March weather, you can visit Portoroz weather in March.
August features warmer weather, with average temperatures reaching 26°C (78°F) and highs climbing to 30°C (87°F), making it a comfortable month for outdoor activities. However, it experiences some rainfall, totaling 58 mm (2.3 in) over about 6 days, and maintains a humidity level of 51%. In contrast, April is significantly cooler, with average temperatures around 13°C (56°F) and a maximum of just 20°C (68°F). Although it has slightly higher precipitation at 86 mm (3.4 in) over 8 days, humidity levels are notably higher at 73%. For more detailed weather information, you can refer to Portoroz weather in April.
In comparing the weather of August and May, notable differences emerge. August typically enjoys warmer temperatures, with averages around 26°C (78°F) and maximums reaching up to 30°C (87°F), while May’s averages are considerably cooler at around 17°C (64°F) and a peak of 24°C (76°F). Additionally, May experiences higher precipitation levels, with 105 mm (4.2 in) falling over 13 days, compared to August's 58 mm (2.3 in) over just 6 days. Humidity levels also differ, as May is more humid at 70%, while August has a lower humidity of 51%. For more detailed information, visit Portoroz weather in May.
Comparing the weather in August and June, we see that both months feature warm temperatures, with August having a slightly higher average of 26°C (78°F) compared to June's 23°C (73°F). While both months can reach a maximum of 30°C (86°F), August tends to be a bit more comfortable with lower humidity levels at 51%, whereas June experiences a higher humidity of 69%. In terms of precipitation, August records 58 mm (2.3 in) over six days, which is slightly less than June's 68 mm (2.7 in) over five days. For more details, check out Portoroz weather in June.
In comparing the weather of August and July, we see some notable differences. August typically has a slightly lower minimum temperature, with a minimum of 17°C (63°F) compared to July's 20°C (68°F). However, the average temperature in August rises to 26°C (78°F), just a degree higher than July’s average of 25°C (77°F). Both months experience a similar maximum temperature, with August reaching 30°C (87°F) and July peaking at 29°C (85°F). Precipitation in August is slightly higher at 58 mm (2.3 in) over 6 days, compared to July's 49 mm (1.9 in) during the same number of days. Additionally, August has a lower humidity level at 51%, while July is more humid at 63%. For more detailed insights on July weather, check out Portoroz weather in July.
In August, the weather features warmer temperatures, with a minimum of 17°C (63°F), an average of 26°C (78°F), and a maximum of 30°C (87°F). This month experiences relatively low precipitation, totaling 58 mm (2.3 in) over 6 days, and a humidity level of 51%.
Conversely, September brings cooler conditions, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 28°C (82°F) and an average of 22°C (71°F). However, it also sees a significant increase in rainfall, with 171 mm (6.7 in) spread over 10 days, and a higher humidity level of 64%. For more details, you can check Portoroz weather in September.
August and October present notably different weather conditions. In August, temperatures are warmer, ranging from a minimum of 17°C (63°F) to a maximum of 30°C (87°F), accompanied by an average of 26°C (78°F). The month experiences a moderate level of precipitation at 58 mm (2.3 in) over about 6 days, while humidity remains relatively comfortable at 51%. In contrast, October brings cooler temperatures, with a minimum of 11°C (52°F) and a maximum of 23°C (73°F), averaging 17°C (64°F). Precipitation increases significantly to 100 mm (4.0 in) spread over 10 days, and the humidity rises substantially to 83%. For more detailed information, visit Portoroz weather in October.
August and November present stark contrasts in weather. August boasts warmer temperatures, with averages around 26°C (78°F) and a maximum of 30°C (87°F), making it a popular month for outdoor activities. However, it experiences relatively low precipitation, with about 58 mm (2.3 in) falling over just six days, alongside a comfortable humidity level of 51%. In contrast, November brings much cooler conditions, with an average temperature of only 13°C (56°F) and a maximum of 19°C (67°F). This month is also significantly wetter, receiving 183 mm (7.2 in) of rain over 13 days, accompanied by high humidity at 89%. For those interested in a detailed overview, you can check Portoroz weather in November.
August and December present stark contrasts in weather. In August, temperatures range from a minimum of 17°C (63°F) to a maximum of 30°C (87°F), with an average of 26°C (78°F), creating a warm and pleasant atmosphere perfect for outdoor activities. In contrast, December sees much cooler temperatures, with a low of 4°C (39°F) and a high of 16°C (60°F), averaging just 10°C (50°F). While August experiences relatively moderate precipitation of 58 mm (2.3 in) over about 6 days, December is significantly wetter, accumulating 150 mm (5.9 in) with rainfall on 13 days. Additionally, the humidity rises dramatically in December to 88%, compared to a more comfortable 51% in August. For more information on December weather in Portorož, check out this link: Portoroz weather in December.
August in Portorož is characterized by warm and inviting conditions, standing out as one of the warmest months of the year. With average temperatures hitting a comfortable 26°C (78°F), it's ideal for sun-seekers looking to indulge in beach activities. Unlike the cooler months, precipitation is relatively low, with just a handful of rain days, making it a perfect time for outdoor adventures. The humidity remains moderate at 51%, ensuring that the warmth is pleasant rather than oppressive. For those wanting to plan their trips and fully embrace the summer vibes, detailed insights can be found at Portoroz Climate.