Mamaia Weather in September

Mamaia in September averages 24°C (75°F) during the day and 16°C (61°F) at night. This is the wettest month of the year.

Rainfall in Mamaia in September

Prepare for the wettest month with an umbrella to protect yourself from frequent rain. The climate data from previous years indicates about 5 days of rain, averaging 54 mm (2.1 in) for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.

Temperature in Mamaia in September

September is a good time to be in Mamaia. Days are perfect, reaching 24°C (75°F), with nights around 16°C (61°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Mamaia in September

The city usually sees around 228 hours of sunlight, indicating many sunny days — a great month for sightseeing.

Wind Speed in Mamaia in September

In September, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

Average water temperature in September

The water sits at 21°C (70°F), which is a nice temperature for swimming. Not too cold, not too warm — most visitors are happy to spend time in the water.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August and September typically offer the best weather for Mamaia.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Romania, check out our Mamaia's climate page.

Mamaia Temperature in September

Min Temperature 16°C (61°F)  

Max Temperature 24°C (75°F)  

Water Temperature 21°C (70°F) *  

Chance of Rain 18%  

Precipitation 54 mm (2.1 in)  

Rainy days 5 days  

Humidity 79% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 228 hours *  

Percentage Sunshine *  

* Data from: Constanţa, Romania (4 KM, 2 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Mamaia typically drop from around 25°C (77°F) at the start of September to approximately 21°C (70°F) by the end. Nights are pleasant, with lows typically ranging from 12°C (54°F) to 16°C (61°F).

Average temperatures in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Mamaia in September

Browse day-by-day weather records for Mamaia spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Mamaia historical weather extremes in September

According to our 49 years of weather records for Mamaia, the following extremes were recorded between 1976 and 2025.

• On September 15, 1987, temperatures climbed to 34°C (93°F), marking the warmest September day on record.
• On September 21, 1996, Mamaia saw its coldest September day with temperatures maxing out at 11°C (52°F).
• Mamaia registered its coldest September night on September 29, 1977, with temperatures dropping to 0°C (32°F).

What to Wear in Mamaia in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Expect water temperatures of around 21°C (70°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Mamaia in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Romania, check out our Mamaia's climate page.

More climate data for Mamaia

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Mamaia climate overview or explore weather in Romania.