Swimming in Romania in september 2025 Sea temperature by city in september
Do you want to go to the beach in Romania in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in Romania by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Romania in september 2025
Here, find the average sea temperature in Romania in september in several coastal cities.
Costinesti
on average:
74°F
min: 69°F / max: 77°F
Eforie Sud
on average:
74°F
min: 69°F / max: 77°F
Mangalia
on average:
74°F
min: 69°F / max: 77°F
Where should you go swimming in Romania in the month of september?
Swimming in Romania in september is pleasant
In september in Romania swimming conditions are generally the same everywhere.
As for Costinesti, Eforie Sud and Mangalia, swimming is pleasant in september. The sea water is 74°F on average (min: 69°F/max: 77°F) so you can easily spend time in the water.
Where to go swimming in Romania in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Costinesti
| September | |||
| Average sea temperature | 74°F | ||
| Minimum sea temperature | 69°F | ||
| Maximum sea temperature | 77°F | ||
| Average outside temperature | 72°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 70°F | ||
| Precipitation | 1.5in | ||
| Number of days of precipitation | 2 jour(s) (7%) | ||
| Cloud cover | 23% | ||
| Our opinion | pleasant swimming |
Eforie Sud
| September | |||
| Average sea temperature | 74°F | ||
| Minimum sea temperature | 69°F | ||
| Maximum sea temperature | 77°F | ||
| Average outside temperature | 72°F | ||
| Maximum outside temperature | 77°F | ||
| Minimum outside temperature | 68°F | ||
| Precipitation | 1.3in | ||
| Number of days of precipitation | 2 jour(s) (6%) | ||
| Cloud cover | 22% | ||
| Our opinion | pleasant swimming |
Mangalia
| September | |||
| Average sea temperature | 74°F | ||
| Minimum sea temperature | 69°F | ||
| Maximum sea temperature | 77°F | ||
| Average outside temperature | 72°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 70°F | ||
| Precipitation | 1.5in | ||
| Number of days of precipitation | 2 jour(s) (7%) | ||
| Cloud cover | 23% | ||
| Our opinion | pleasant swimming |
List of coastal cities in Romania
| Costinesti in september | pleasant swimming |
| Eforie Sud in september | pleasant swimming |
| Mangalia in september | pleasant swimming |