Month-specific sea-surface temperature · Montenegro
Bay of Kotor Sea Temperature in September
25.2°C
77.4°F
In September, sea-surface temperature near Bay of Kotor has a historical monthly average of 25.2°C. This is not the reading for any particular holiday date.
Across 2022–2025, the lowest and highest yearly September monthly means were 24.7–25.7°C. These are not daily extremes.
Previous month
August · 27.0°C
Change into September: -1.8°C
Next month
October · 21.7°C
Change into next month: -3.5°C
Can you swim or snorkel in Bay of Kotor in September?
At 25.2°C our temperature-only guide describes the water as warm water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.
Do you need a wetsuit?
Most people are comfortable in swimwear or a light rash guard.
Which beach should you choose?
Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.
The Bay of Kotor is a sheltered Adriatic bay. Its water can differ from the open coast, so use this page for the temperature trend and the forecast page for wind, waves and tide.
Check the current waves, wind and snorkeling forecast →
A live forecast does not predict a future September. Check again close to your trip.
Data source and limitations
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2022–2025. Marine model grid near 42.43, 18.68. Based on 3 yearly monthly means and 2160 recorded samples. Source methodology.
Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.