Last updated: August 21, 2025
September in Spetses, Greece offers a delightful escape with pleasant temperatures averaging around 25°C (77°F). Daily highs can reach a warm 31°C (88°F), making it ideal for beachgoers and outdoor enthusiasts alike. As the summer wraps up, expect cooler nights with lows around 18°C (64°F). While the island sees about 32 mm (1.2 in) of precipitation over just 2 days, the humidity hovers at a comfortable 65%, ensuring that warm afternoons transition into refreshingly cool evenings. This month provides an enchanting blend of warmth and tranquility, perfect for exploring the island’s charm before the autumn chill sets in.
As September rolls in, Spetses, Greece welcomes a delightful transition from the summer heat, presenting an inviting climate ideal for exploration. With minimum temperatures around 18°C (64°F) and averaging a pleasant 25°C (77°F), days are comfortably warm, perfect for enjoying the island’s beautiful beaches or wandering through its charming streets. The maximum temperatures can reach up to 31°C (88°F), allowing the sun to shine down without the sweltering intensity of the peak summer months. This ideal blend of warmth and coolness not only enhances outdoor activities but also brings a sense of tranquility as the summer crowds begin to thin. Overall, September in Spetses promises warm, sun-kissed days and mild evenings, making it a fantastic time to experience the island's beauty.
September in Spetses, Greece marks a notable transition as the summer heat begins to wane. With 32 mm (1.2 in) of precipitation spread over just 2 days, this month experiences a significant uptick in rainfall compared to the dry summer months of July and August, which saw minimal amounts. The rains arrive as a welcome relief, replenishing the island's lush landscapes and hinting at the wetter months to follow. As the autumn season approaches, September serves as a reminder of nature's rhythm, bridging the sun-drenched days with the more temperate, rainy climate that characterizes the months ahead.
As summer fades into autumn, September in Spetses, Greece, often brings a pleasant shift in humidity levels, settling at 65%. This slight increase from the dry peak of 63% in August indicates a gradual rebalancing of the air as temperatures cool. The overall trend throughout the year shows a pattern of higher humidity in the early months, with January recording a peak of 76%, while the summer months consistently see lower levels, culminating in July's lowest at 68%. September's humidity is a gentle reminder of the approaching fall, offering a slightly more comfortable climate for both residents and visitors, contrasting the drier and hotter summer days. As the year progresses, humidity begins to rise again, leading into the familiar patterns of October and November, reflecting the region’s characteristic maritime climate.
As summer transitions to autumn, September in Spetses, Greece, sees a slight dip in the UV Index, which stands at 8, placing it in the very high exposure category. This change follows a summer of consistently high UV levels, with July and August peaking at 10, prompting a rapid burn time of just 15 minutes. While September remains strong in terms of UV exposure, it offers a brief respite compared to the scorching summer months and corresponds with a burn time of 15 minutes. Visitors should remain vigilant and continue to take sun safety precautions, as this month still demands attention for skin protection. For more insights, explore Spetses UV Index.
UV Risk Categories
As summer gracefully transitions into autumn, September in Spetses, Greece, continues to bask in an inviting glow, boasting 347 hours of sunshine. This month signals a gentle decline from the peak of summer, where July shines with a dazzling 422 hours. The trend reveals a gradual reduction, yet September remains luminous compared to the earlier months of the year, such as January's mere 216 hours. With the warm, golden rays casting a spell over the island, September offers a perfect blend of warmth and tranquility, attracting those looking to relish the last vestiges of summer in a picturesque setting. As the days shorten, the island's charm persists, making it an ideal time for leisurely strolls and enchanting sunsets that linger just a bit longer.
As summer transitions into autumn, September in Spetses, Greece, maintains a delightful 79% chance of sunny weather, reflecting a trend of overall high sunshine throughout the warmer months. Following the sun-drenched days of July and August, which boast an impressive 96% chance of sun, September offers a perfect blend of lingering warmth and less crowded beaches, as the likelihood of sunny skies remains robust. While the month marks a gradual shift toward cooler temperatures, it still promises plenty of sunshine, inviting visitors to bask in the scenic beauty of this charming island. September's sunny disposition makes it an ideal time for travelers seeking to enjoy a milder climate without sacrificing the radiant Greek sunshine.
As summer transitions to autumn in Spetses, Greece, September welcomes a gentle shift in daylight duration, offering approximately 12 hours of sunlight each day. This marks a gradual decline from the peak of 14 hours seen in the vibrant months of June, July, and August. The daylight hours begin to wane slowly, hinting at the cozy embrace of fall while still providing ample time for outdoor adventures and sunlit strolls. In the grand panorama of the year, September stands as a bridge—balancing the lingering warmth of summer with the onset of cooler days, making it a particularly enchanting time to experience the island’s scenic beauty.
As summer fades, September in Spetses greets visitors with a refreshing breeze, boasting an average wind speed of 4.4 m/s (10 mph). This invigorating wind marks a subtle uptick from the waning summer months of August and July, creating a perfect environment for outdoor activities. It serves as a gentle harbinger of the more blustery days ahead in October, where the winds pick up to 5.3 m/s (12 mph). The overall trend reveals that September offers a delightful balance between the calm warmth of summer and the brisk energy of autumn, making it an ideal month to explore the island’s scenic charm and embrace its coastal allure.
Weather in Spetses varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Spetses, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather is characterized by warm temperatures, with a minimum of 18°C (64°F) and an average high of 31°C (88°F), creating a pleasant atmosphere perfect for outdoor activities. In contrast, January brings a significant drop in temperature, ranging from a chilly 3°C (38°F) to a maximum of 21°C (69°F), making it feel much cooler. Additionally, September sees relatively low precipitation at 32 mm (1.2 in) over just 2 days, while January is wetter, recording 53 mm (2.1 in) spread over 8 days, contributing to higher humidity levels of 76%. For more details on January's climate, check out Spetses weather in January.
September and February present stark contrasts in weather. In September, temperatures typically range from a pleasant minimum of 18°C (64°F) to a warm average of 25°C (77°F), peaking at a high of 31°C (88°F). This month experiences relatively low precipitation, with only 32 mm (1.2 in) falling over just 2 days, and humidity averages around 65%. In contrast, February brings cooler conditions, featuring a minimum temperature of 5°C (41°F) and an average of 13°C (55°F), with a maximum of 18°C (64°F). This month is wetter, with 55 mm (2.1 in) of rain occurring across 7 days, and humidity levels rise to 75%. For a more detailed look at February conditions, you can explore Spetses weather in February.
September and March present contrasting weather conditions, showcasing the transition between summer and early spring. In September, temperatures are generally warm, with average highs reaching 31°C (88°F) and lows around 18°C (64°F), accompanied by relatively low precipitation of 32 mm (1.2 in) over just two days. Humidity is moderate at 65%, making it a comfortable time for outdoor activities. In contrast, March brings cooler temperatures, with an average high of 19°C (66°F) and lows dipping to 5°C (41°F). This month sees slightly higher precipitation at 35 mm (1.4 in) over four days and increased humidity at 74%, making the air feel a bit wetter and chillier. For those interested in more details about March weather, you can check out Spetses weather in March.
September typically enjoys warmer temperatures compared to April, with average highs reaching 25°C (77°F) and maximums soaring up to 31°C (88°F), while April's temperatures are more modest, averaging around 16°C (60°F) with maxes of 22°C (72°F). Additionally, September sees less frequent precipitation, averaging only 32 mm (1.2 in) over just 2 days, in contrast to April's 25 mm (1.0 in) spread over 4 days. Humidity levels are slightly lower in September at 65%, while April experiences a higher humidity level of 75%. For more detailed insights on the weather in April, you can check Spetses weather in April.
September typically offers warmer weather compared to May, with average temperatures reaching 25°C (77°F) and maximums soaring up to 31°C (88°F). In contrast, May sees milder temperatures, with an average of 20°C (68°F) and maximums of 26°C (79°F). September also experiences slightly more precipitation, totaling 32 mm (1.2 in) over about two days, whereas May has less rainfall at just 11 mm (0.4 in) over one day. Humidity in May is higher at 77%, compared to 65% in September, which can make the evenings feel a bit cooler in September. For more detailed information on the weather conditions, you can check Spetses weather in May.
In comparing the weather between September and June, we can see notable differences in temperature and humidity. September tends to be warmer, with average temperatures reaching 25°C (77°F) and a maximum of 31°C (88°F). In contrast, June has a slightly cooler average temperature of 24°C (75°F) and a maximum of 29°C (85°F). Precipitation levels are also different; September experiences 32 mm (1.2 in) over two days, while June has only 9 mm (0.3 in) during the same number of days. Additionally, the humidity is slightly higher in June at 71%, compared to 65% in September. For more detailed insights on weather patterns, you can check Spetses weather in June.
In July, the weather is typically warmer with average temperatures reaching 27°C (80°F) and maximums soaring up to 33°C (92°F). With minimal precipitation at just 2 mm (0.1 in) over zero days, July enjoys a drier climate, accompanied by slightly higher humidity at 68%. In contrast, September experiences a bit of cooling, with temperatures ranging from a minimum of 18°C (64°F) to an average of 25°C (77°F) and a maximum of 31°C (88°F). Although September sees more rain, with 32 mm (1.2 in) over two days, the humidity remains similar at 65%. For those interested in a detailed look at July weather, visit Spetses weather in July.
In comparing the weather of September and August, September tends to be slightly cooler with an average temperature of 25°C (77°F) compared to August's higher average of 27°C (81°F). Additionally, September experiences a lower maximum temperature of 31°C (88°F), whereas August can peak at a warmer 34°C (93°F). Precipitation also increases in September, totaling 32 mm (1.2 in) over two days, in contrast to August's minimal 6 mm (0.2 in) over just one day. Humidity levels are fairly similar, with September at 65% and August at 63%. For more detailed insights, you can visit Spetses weather in August.
In September, the weather features warmer temperatures, with a minimum of 18°C (64°F), averaging 25°C (77°F), and peaking at 31°C (88°F). The month experiences relatively low precipitation, totaling 32 mm (1.2 in) over just 2 days, and the humidity stands at 65%. In contrast, October brings a slight cool down, with minimum temperatures of 16°C (60°F) and an average of 21°C (70°F), reaching a maximum of 27°C (81°F). While the precipitation decreases slightly to 28 mm (1.1 in), it occurs over a greater number of days, totaling 3. Additionally, the humidity increases to 72%, contributing to a different feel in the autumn air. For more insights, visit Spetses weather in October.
September generally offers warmer weather compared to November, with average temperatures around 25°C (77°F) peaking at 31°C (88°F). In contrast, November sees cooler temperatures, with an average of 18°C (64°F) and a maximum of 24°C (75°F). Additionally, September experiences less rainfall, averaging 32 mm (1.2 in) over just 2 days, while November has increased precipitation at 55 mm (2.1 in) spread over 8 days. The humidity also rises slightly in November to 75%, compared to 65% in September. For a more detailed look at November conditions, check out Spetses weather in November.
September and December showcase a notable contrast in weather patterns. In September, temperatures range from a mild 18°C (64°F) to a warm 31°C (88°F), accompanied by relatively low precipitation of 32 mm (1.2 in) over just two days, resulting in a comfortable humidity level of 65%. In contrast, December experiences much cooler temperatures, with a minimum of 8°C (46°F) and a maximum of 20°C (68°F), and an increase in rainfall to 55 mm (2.2 in) spread over nine days, leading to a higher humidity of 76%. For more detailed insights, you can check Spetses weather in December.
As summer transitions into autumn, September in Spetses offers an elegant blend of warmth and tranquility. With average temperatures hovering around a pleasant 25°C, this month invites visitors to bask in the sun while enjoying the stunning coastal views. While the humidity remains moderate at 65%, the chances of rainfall are minimal, with only a couple of days bringing a light sprinkle. This delightful weather pattern sets September apart from the more sweltering summer months, making it an ideal time for exploration, relaxation, and outdoor activities. To learn more about what to expect throughout the year, visit Spetses Climate.