Swimming on the Croatian Islands in september 2025 Sea temperature by city in september
Do you want to go to the beach on the Croatian Islands 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 on the Croatian Islands by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature on the Croatian Islands in september 2025
Here, find the average sea temperature on the Croatian Islands in september in several coastal cities.
Central in september
75°F
min: 71°F / max: 81°F
76°F
min: 70°F / max: 81°F
75°F
min: 70°F / max: 81°F
76°F
min: 70°F / max: 81°F
Olib island
75°F
min: 70°F / max: 81°F
Biševo island
76°F
min: 70°F / max: 81°F
North in september
74°F
min: 69°F / max: 80°F
75°F
min: 69°F / max: 81°F
Ilovik island
75°F
min: 69°F / max: 81°F
Lošinj island
75°F
min: 70°F / max: 81°F
Rab
75°F
min: 70°F / max: 81°F
Susak island
75°F
min: 70°F / max: 81°F
South in september
76°F
min: 71°F / max: 81°F
76°F
min: 71°F / max: 81°F
Koločep island
76°F
min: 71°F / max: 82°F
Lastovo island
76°F
min: 71°F / max: 81°F
Lopud island
76°F
min: 71°F / max: 82°F
Šipan island
76°F
min: 71°F / max: 81°F
Where should you go swimming on the Croatian Islands in the month of september?
Swimming on the Croatian Islands in september is pleasant
In september on the Croatian Islands swimming conditions are generally the same everywhere.
As for Hvar island, Krk island, Pag island, Brač, Cres island, Korčula Island, Mljet, Vis island, Olib island, Biševo island, Čiovo island, Drvenik Veliki island, Dugi Otok island, Ilovik island, Iž island, Kaprije island, Koločep island, Kornati island, Krapanj island, Lastovo island, Lopud island, Lošinj island, Molat island, Murter island, Pašman island, Premuda island, Prvić island, Rab, Silba island, Šipan island, Šolta island, Susak island, Ugljan island, Unije island, Vir island, Žirje island, Zlarin island, Zverinac island, Krka, Novalja and Punat, swimming is pleasant in september. The sea water is 75°F on average (min: 71°F/max: 81°F) so you can easily spend time in the water.
Where to go swimming on the Croatian Islands in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Hvar island
| September | |||
| Average sea temperature | 75°F | ||
| Minimum sea temperature | 71°F | ||
| Maximum sea temperature | 81°F | ||
| Average outside temperature | 72°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 70°F | ||
| Precipitation | 2.7in | ||
| Number of days of precipitation | 4 jour(s) (14%) | ||
| Cloud cover | 18% | ||
| Our opinion | pleasant swimming |
More information on swimming in Hvar island in september
Krk island
| September | |||
| Average sea temperature | 74°F | ||
| Minimum sea temperature | 69°F | ||
| Maximum sea temperature | 80°F | ||
| Average outside temperature | 65°F | ||
| Maximum outside temperature | 70°F | ||
| Minimum outside temperature | 61°F | ||
| Precipitation | 6.2in | ||
| Number of days of precipitation | 6 jour(s) (21%) | ||
| Cloud cover | 27% | ||
| Our opinion | pleasant swimming |
More information on swimming in Krk island in september
Pag island
| September | |||
| Average sea temperature | 76°F | ||
| Minimum sea temperature | 70°F | ||
| Maximum sea temperature | 81°F | ||
| Average outside temperature | 65°F | ||
| Maximum outside temperature | 70°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 7in | ||
| Number of days of precipitation | 9 jour(s) (29%) | ||
| Cloud cover | 27% | ||
| Our opinion | pleasant swimming |
More information on swimming in Pag island in september
Brač
| September | |||
| Average sea temperature | 75°F | ||
| Minimum sea temperature | 70°F | ||
| Maximum sea temperature | 81°F | ||
| Average outside temperature | 72°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 70°F | ||
| Precipitation | 2.7in | ||
| Number of days of precipitation | 4 jour(s) (14%) | ||
| Cloud cover | 18% | ||
| Our opinion | pleasant swimming |
More information on swimming in Brač in september
Cres island
| September | |||
| Average sea temperature | 75°F | ||
| Minimum sea temperature | 69°F | ||
| Maximum sea temperature | 81°F | ||
| Average outside temperature | 74°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 72°F | ||
| Precipitation | 6.7in | ||
| Number of days of precipitation | 7 jour(s) (25%) | ||
| Cloud cover | 21% | ||
| Our opinion | pleasant swimming |
More information on swimming in Cres island in september
List of coastal cities on the Croatian Islands
| Hvar island in september | pleasant swimming |
| Krk island in september | pleasant swimming |
| Pag island in september | pleasant swimming |
| Brač in september | pleasant swimming |
| Cres island in september | pleasant swimming |
| Korčula Island in september | pleasant swimming |
| Mljet in september | pleasant swimming |
| Vis island in september | pleasant swimming |
| Olib island in september | pleasant swimming |
| Biševo island in september | pleasant swimming |
| Čiovo island in september | pleasant swimming |
| Drvenik Veliki island in september | pleasant swimming |
| Dugi Otok island in september | pleasant swimming |
| Ilovik island in september | pleasant swimming |
| Iž island in september | pleasant swimming |
| Kaprije island in september | pleasant swimming |
| Koločep island in september | pleasant swimming |
| Kornati island in september | pleasant swimming |
| Krapanj island in september | pleasant swimming |
| Lastovo island in september | pleasant swimming |
| Lopud island in september | pleasant swimming |
| Lošinj island in september | pleasant swimming |
| Molat island in september | pleasant swimming |
| Murter island in september | pleasant swimming |
| Pašman island in september | pleasant swimming |
| Premuda island in september | pleasant swimming |
| Prvić island in september | pleasant swimming |
| Rab in september | pleasant swimming |
| Silba island in september | pleasant swimming |
| Šipan island in september | pleasant swimming |
| Šolta island in september | pleasant swimming |
| Susak island in september | pleasant swimming |
| Ugljan island in september | pleasant swimming |
| Unije island in september | pleasant swimming |
| Vir island in september | pleasant swimming |
| Žirje island in september | pleasant swimming |
| Zlarin island in september | pleasant swimming |
| Zverinac island in september | pleasant swimming |
| Krka in september | pleasant swimming |
| Novalja in september | pleasant swimming |
| Punat in september | pleasant swimming |