Blue Lake (Croatia)

Lake Karst sinkhole lake with dramatic seasonal water changes

Near Imotski, Blue Lake sits in a dramatic karst sinkhole whose water level changes with the seasons; visitors hike the rim for sheer cliff views and, when allowed, swim in summer.

Main image

Blue Lake (Modro Jezero) near Imotski is a karst sinkhole lake in Split-Dalmatia County, Croatia, noted for its steep circular cliffs and vivid water colour that changes with season and light. It is a prominent local natural landmark.

A dramatic crater-like basin surrounded by vertical limestone walls forms the lake, with rim viewpoints and pathways used by visitors to look down into the water. The lake’s water level fluctuates seasonally, which alters the exposed rock terraces and shoreline.

The feature is a natural karst formation created by collapse and solution of limestone over geological time; it has been a landmark for the region and a subject of local interest and study.

Blue Lake lies a short drive from the town of Imotski in inland Dalmatia, positioned within a karst landscape of sinkholes and underground drainage typical of the region.

  • Seasonal changes: Water level and colour vary seasonally because the lake occupies a karst sinkhole; levels typically rise after winter rains and fall in summer, changing the visible shoreline and hue.
  • Best viewpoints: Several viewpoints and a path along the rim provide safe vantage points to view the steep cliffs and water-filled sinkhole from above.
Blue Lake (Croatia)
Blue Lake (Plitvice/retreat area) near Imotski, Split-Dalmatia County, Croatia
43.4506, 17.2100
Outdoor natural site; accessible during daylight hours
Park/entrance fees can apply to national park areas; nearby attractions (zipline, cable car) have separate charges

How to Get to Blue Lake (Croatia) #

The Blue Lake is near Imotski; drive along regional roads from Split (approx. 1.5-2 hours). Local signage leads to parking and viewpoints near the rim.

Tips for Visiting Blue Lake (Croatia) #

  • Arrive early to find parking and to see the lake before midday tourist buses arrive.
  • There are lookout platforms with better vantage points - follow local signage for designated viewpoints.
  • Avoid the high summer afternoon rush by visiting in shoulder seasons when water levels and light are more agreeable.

Best Time to Visit Blue Lake (Croatia) #

Spring and autumn offer the best combination of colour, light and fewer crowds; midsummer is busiest.

Spring-early summer
April-June · 15-25°C
Water levels are often higher and colours vivid after winter rains.
Autumn
September-October · 12-22°C
Fewer tourists and warm light for photography.

Weather & Climate near Blue Lake (Croatia) #

Climate

Blue Lake (Croatia)'s climate is classified as Humid Subtropical - Humid Subtropical climate with warm summers (peaking in July) and cold winters (coldest in January). Temperatures range from 0°C to 28°C. Moderate rainfall (942 mm/year).

Best Time to Visit
JulyAugustJune
Temperature & Rainfall
Temperature Range
39°
Warmest Month
-22°
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 7°C and lows of 0°C. Regular rainfall (81 mm) and mostly overcast skies.

41 Poor

Comfort

Feels Like Cold
C
Temperature
89%
Humidity
Very Humid

Weather

81 mm
Rainfall
2.1 m/s
Wind
Calm
0.2
UV Index
Low
9.2h daylight

February

February is cold with highs of 9°C and lows of 0°C. Moderate rainfall (73 mm) and mostly overcast skies.

45 Poor

Comfort

Feels Like Cold
C
Temperature
88%
Humidity
Very Humid

Weather

73 mm
Rainfall
2.5 m/s
Wind
Calm
0.3
UV Index
Low
10.3h daylight

March

March is cold with highs of 12°C and lows of 3°C. Moderate rainfall (74 mm) and mostly overcast skies.

53 Acceptable

Comfort

Feels Like Cold
C
Temperature
12°
84%
Humidity
Very Humid

Weather

74 mm
Rainfall
2.7 m/s
Wind
Calm
0.6
UV Index
Moderate
11.8h daylight

April

April is cool with highs of 16°C and lows of 6°C. Regular rainfall (81 mm) and mostly overcast skies.

61 Good

Comfort

11°
Feels Like Cool
11°C
Temperature
17°
78%
Humidity
Very Humid

Weather

81 mm
Rainfall
2.5 m/s
Wind
Calm
1.0
UV Index
High
13.3h daylight

May

May is cool with highs of 22°C and lows of 10°C. Moderate rainfall (63 mm) and partly cloudy skies.

69 Good

Comfort

16°
Feels Like Cool
16°C
Temperature
10° 22°
75%
Humidity
Very Humid

Weather

63 mm
Rainfall
2.3 m/s
Wind
Calm
1.4
UV Index
High
14.5h daylight

June

June is mild with highs of 26°C and lows of 14°C. Moderate rainfall (63 mm) and partly cloudy skies.

81 Excellent

Comfort

20°
Feels Like Mild
20°C
Temperature
14° 26°
69%
Humidity
Humid

Weather

63 mm
Rainfall
2.0 m/s
Wind
Calm
1.8
UV Index
Very High
15.2h daylight

July

July is the warmest month with highs of 28°C and lows of 16°C. Moderate rainfall (44 mm).

89 Excellent

Comfort

22°
Feels Like Mild
22°C
Temperature
16° 29°
56%
Humidity
Humid

Weather

44 mm
Rainfall
2.1 m/s
Wind
Calm
1.9
UV Index
Very High
14.9h daylight

August

August is mild with highs of 28°C and lows of 16°C. Moderate rainfall (56 mm).

87 Excellent

Comfort

22°
Feels Like Mild
22°C
Temperature
16° 28°
53%
Humidity
Humid

Weather

56 mm
Rainfall
1.9 m/s
Wind
Calm
1.6
UV Index
Very High
13.8h daylight

September

September is mild with highs of 24°C and lows of 12°C. Moderate rainfall (77 mm) and partly cloudy skies.

79 Very Good

Comfort

18°
Feels Like Mild
18°C
Temperature
12° 24°
67%
Humidity
Humid

Weather

77 mm
Rainfall
2.0 m/s
Wind
Calm
1.0
UV Index
High
12.4h daylight

October

October is cool with highs of 18°C and lows of 8°C. Significant rainfall (104 mm) and partly cloudy skies.

67 Good

Comfort

13°
Feels Like Cool
13°C
Temperature
18°
78%
Humidity
Very Humid

Weather

104 mm
Rainfall
2.1 m/s
Wind
Calm
0.6
UV Index
Moderate
10.9h daylight

November

November is cold with highs of 13°C and lows of 4°C. The wettest month with heavy rain (122 mm) and partly cloudy skies.

53 Acceptable

Comfort

Feels Like Cold
C
Temperature
13°
86%
Humidity
Very Humid

Weather

122 mm
Rainfall
2.5 m/s
Wind
Calm
0.2
UV Index
Low
9.5h daylight

December

December is cold with highs of 8°C and lows of 1°C. Significant rainfall (104 mm) and partly cloudy skies.

45 Poor

Comfort

Feels Like Cold
C
Temperature
89%
Humidity
Very Humid

Weather

104 mm
Rainfall
2.5 m/s
Wind
Calm
0.1
UV Index
Low
8.8h daylight

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