How warm is the sea in Istra?
The sea in Istra is currently 27°C.
Sea temperature is measured at the surface and updated hourly.
The sea in Istra is 27°C today, the weather is partly cloudy, 29°C.
Croatia
Last updated: 11 July 2026, 15:55
Next 48 hours
The best time to visit is from June to September. The sea is warmest in August (26.3°C).
| Month | Max | Min | Rain (days) | Sea |
|---|---|---|---|---|
| January | 10° | 5° | 9 | 13° |
| February | 11° | 6° | 10 | 12° |
| March | 13° | 8° | 9 | 13° |
| April | 17° | 11° | 9 | 15° |
| May | 21° | 15° | 12 | 18° |
| June | 26° | 20° | 7 | 22° |
| July | 29° | 22° | 6 | 26° |
| August | 29° | 23° | 6 | 26° |
| September | 24° | 18° | 10 | 24° |
| October | 20° | 14° | 11 | 20° |
| November | 15° | 10° | 13 | 18° |
| December | 12° | 7° | 11 | 15° |
The sea in Istra is currently 27°C.
Sea temperature is measured at the surface and updated hourly.
The best time to visit is from June to September. The sea is warmest in August (26.3°C).
Derived from the 2015–2024 climate averages.
Tomorrow in Istra expect thunderstorms, with a high of 29°C and a low of 21°C.
The weekend forecast for Istra: rain on Saturday (30°/23°), thunderstorms on Sunday (29°/21°).