Jussarö

Island Finnish island with abandoned quarry and fortifications

An island off Finland’s Gulf of Finland, Jussarö draws day-trippers from Hanko for rocky coastlines, an abandoned ironworks, wartime bunkers and a small guest harbor. People come to hike, swim and dive around the island’s clear waters.

Main image
Jussarö
59.8253, 23.5633

How to Get to Jussarö #

Jussarö is reached by boat from the Hanko (Hangö) and Raseborg/Tammisaari area during the summer season; private boats and charter services also operate from regional marinas. Visitors should check local ferry timetables and seasonal schedules before planning a trip.

Tips for Visiting Jussarö #

  • Take the scheduled summer ferry from Hanko (Hangö) or nearby mainland harbors-check local timetables; private boats are common.
  • Bring shoes that can handle slippery concrete and broken masonry-the island is full of old quarries and ruined buildings.
  • Respect closure signs: some former military zones and cellars are unstable and off-limits.

Best Time to Visit Jussarö #

Visit in summer for reliable boat connections and to see the abandoned industrial architecture at its most accessible.

Summer (Jun-Aug)
Jun-Aug · 15-22°C
Warmest, calm sea, ferry services run frequently; best time to explore the island's ruins.
Late spring/early autumn (May, Sep)
May, Sep · 8-15°C
Fewer day-trippers and pleasant walking weather; some facilities may be closed.
Winter (Oct-Apr)
Oct-Apr · -5-5°C
Sea ice and rough weather make access sporadic; the island is quiet and exposed.

Weather & Climate near Jussarö #

Climate

Continental climate with mild summers (peaking in July) and freezing winters (coldest in February). Temperatures range from -7°C to 20°C. Moderate rainfall (641 mm/year).

Best Time to Visit
JuneJulyAugust
Temperature & Rainfall
Temperature Range
30°
Warmest Month
-25°
Coldest Month
Monthly Conditions

January

January is freezing with highs of 0°C and lows of -5°C. Moderate rainfall (48 mm) and mostly overcast skies.

35 Poor

Comfort

-2°
Feels Like Freezing
-2°C
Temperature
-5°
95%
Humidity
Very Humid

Weather

48 mm
Rainfall
5.3 m/s
Wind
Light Breeze
0.0
UV Index
Low
6.7h daylight

February

February is the coldest month with highs of -2°C and lows of -7°C. Moderate rainfall (35 mm) and mostly overcast skies.

37 Poor

Comfort

-4°
Feels Like Freezing
-4°C
Temperature
-7° -2°
95%
Humidity
Very Humid

Weather

35 mm
Rainfall
4.9 m/s
Wind
Light Breeze
0.1
UV Index
Low
9.0h daylight

March

March is freezing with highs of 1°C and lows of -4°C. Moderate rainfall (37 mm) and partly cloudy skies.

43 Poor

Comfort

-2°
Feels Like Freezing
-2°C
Temperature
-4°
91%
Humidity
Very Humid

Weather

37 mm
Rainfall
4.4 m/s
Wind
Light Breeze
0.2
UV Index
Low
11.6h daylight

April

April is cold with highs of 6°C and lows of 0°C. Moderate rainfall (36 mm) and partly cloudy skies.

52 Acceptable

Comfort

Feels Like Cold
C
Temperature
85%
Humidity
Very Humid

Weather

36 mm
Rainfall
4.3 m/s
Wind
Light Breeze
0.6
UV Index
Moderate
14.3h daylight

May

May is cold with highs of 12°C and lows of 5°C. Moderate rainfall (31 mm) and partly cloudy skies.

66 Good

Comfort

Feels Like Cold
C
Temperature
12°
80%
Humidity
Very Humid

Weather

31 mm
Rainfall
4.2 m/s
Wind
Light Breeze
1.0
UV Index
High
16.8h daylight

June

June is cool with highs of 17°C and lows of 10°C. Moderate rainfall (40 mm) and partly cloudy skies.

76 Very Good

Comfort

14°
Feels Like Cool
14°C
Temperature
10° 17°
80%
Humidity
Very Humid

Weather

40 mm
Rainfall
4.0 m/s
Wind
Light Breeze
1.3
UV Index
High
18.2h daylight

July

July is cool with highs of 20°C and lows of 14°C. Moderate rainfall (64 mm) and partly cloudy skies.

70 Very Good

Comfort

17°
Feels Like Cool
17°C
Temperature
14° 20°
80%
Humidity
Very Humid

Weather

64 mm
Rainfall
3.8 m/s
Wind
Light Breeze
1.3
UV Index
High
17.5h daylight

August

August is cool with highs of 19°C and lows of 13°C. Moderate rainfall (75 mm) and partly cloudy skies.

68 Good

Comfort

16°
Feels Like Cool
16°C
Temperature
13° 19°
80%
Humidity
Very Humid

Weather

75 mm
Rainfall
3.8 m/s
Wind
Light Breeze
0.9
UV Index
Moderate
15.3h daylight

September

September is cool with highs of 14°C and lows of 9°C. Moderate rainfall (67 mm) and partly cloudy skies.

60 Good

Comfort

12°
Feels Like Cool
12°C
Temperature
14°
84%
Humidity
Very Humid

Weather

67 mm
Rainfall
4.5 m/s
Wind
Light Breeze
0.4
UV Index
Low
12.6h daylight

October

October is cold with highs of 9°C and lows of 5°C. Moderate rainfall (68 mm) and mostly overcast skies.

54 Acceptable

Comfort

Feels Like Cold
C
Temperature
88%
Humidity
Very Humid

Weather

68 mm
Rainfall
5.0 m/s
Wind
Light Breeze
0.1
UV Index
Low
10.0h daylight

November

November is cold with highs of 5°C and lows of 1°C. The wettest month with 76 mm of rain and mostly overcast skies.

40 Poor

Comfort

Feels Like Cold
C
Temperature
93%
Humidity
Very Humid

Weather

76 mm
Rainfall
5.5 m/s
Wind
Light Breeze
0.0
UV Index
Low
7.4h daylight

December

December is freezing with highs of 2°C and lows of -2°C. Moderate rainfall (64 mm) and mostly overcast skies.

34 Poor

Comfort

Feels Like Freezing
C
Temperature
-2°
94%
Humidity
Very Humid

Weather

64 mm
Rainfall
5.4 m/s
Wind
Light Breeze
0.0
UV Index
Low
5.9h daylight

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