Köyliönjärvi Lake

Finnish lake notable for medieval church island

Köyliönjärvi in Satakunta is a midsized Finnish lake with shoreline trails and summer cottages; the lake attracts anglers, paddlers and walkers exploring regional countryside.

Main image
Address
Köyliönjärvi, Köyliö, Satakunta, Finland (near Köyliö village)
61.13829, 22.32849
Admission
Free (natural lake)
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How to Get to Köyliönjärvi#

Köyliönjärvi is a short drive from the town of Sastamala or from Pori via regional roads; parking is available at village lots. The nearest larger transport hub is Pori-regional buses serve smaller towns, but a car makes the last leg far easier.

Tips for Visiting Köyliönjärvi#

  • The area has folklore connected to local battles and gatherings - stop by a local museum in Köyliö for context.
  • There is a memorial to the 12th-century Battle of Köyliö nearby - combine the lake visit with that site if interested in history.
  • Parking is limited; use village car parks and follow the footpaths to the quieter shores.

Best Time to Visit Köyliönjärvi#

Summer for water activities; winter for ice sports when frozen solid. Shoulder seasons offer quieter walks and good light.

Summer (Jun-Aug)
June-August · 15-25°C
Warm swimming and boating; local festivals occasionally on the shore.
Autumn (Sep-Nov)
September-November · 0-10°C
Changing foliage and quieter walking paths; mosquitoes diminish.
Winter (Dec-Feb)
December-February · -20-0°C
Frozen surface for skating and snow activities when ice is thick and safe.

Weather & Climate near Köyliönjärvi#

Climate

Köyliönjärvi's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in July) and freezing winters (coldest in February). Temperatures range from -10°C to 21°C. Moderate rainfall (591 mm/year).

Best Time to Visit
JuneJulyAugust
Temperature & Rainfall
Temperature Range
31°
Warmest Month
-32°
Coldest Month
Monthly Conditions

January

January is freezing with highs of -2°C and lows of -9°C. Moderate rainfall (42 mm) and mostly overcast skies.

37 Poor

Comfort

-6°
Feels Like Freezing
-6°C
Temperature
-9° – -2°
98%
Humidity
Very Humid

Weather

42 mm
Rainfall
3.1 m/s
Wind
Light Breeze
0.0
UV Index
Low
6.1h daylight

February

February is the coldest month with highs of -3°C and lows of -10°C. Moderate rainfall (31 mm) and mostly overcast skies.

39 Poor

Comfort

-6°
Feels Like Freezing
-6°C
Temperature
-10° – -3°
97%
Humidity
Very Humid

Weather

31 mm
Rainfall
3.0 m/s
Wind
Light Breeze
0.0
UV Index
Low
8.7h daylight

March

March is freezing with highs of 1°C and lows of -6°C. Moderate rainfall (34 mm) and partly cloudy skies.

43 Poor

Comfort

-2°
Feels Like Freezing
-2°C
Temperature
-6° – 1°
92%
Humidity
Very Humid

Weather

34 mm
Rainfall
3.1 m/s
Wind
Light Breeze
0.2
UV Index
Low
11.6h daylight

April

April is cold with highs of 7°C and lows of -1°C. Moderate rainfall (37 mm) and partly cloudy skies.

52 Acceptable

Comfort

3°
Feels Like Cold
3°C
Temperature
-1° – 7°
82%
Humidity
Very Humid

Weather

37 mm
Rainfall
3.1 m/s
Wind
Light Breeze
0.5
UV Index
Moderate
14.5h daylight

May

May is cold with highs of 15°C and lows of 4°C. Moderate rainfall (32 mm) and partly cloudy skies.

64 Good

Comfort

10°
Feels Like Cold
10°C
Temperature
4° – 15°
77%
Humidity
Very Humid

Weather

32 mm
Rainfall
3.1 m/s
Wind
Light Breeze
0.9
UV Index
Moderate
17.2h daylight

June

June is cool with highs of 20°C and lows of 9°C. Moderate rainfall (55 mm) and partly cloudy skies.

70 Very Good

Comfort

14°
Feels Like Cool
14°C
Temperature
9° – 20°
77%
Humidity
Very Humid

Weather

55 mm
Rainfall
3.0 m/s
Wind
Light Breeze
1.1
UV Index
High
18.9h daylight

July

July is cool with highs of 21°C and lows of 11°C. The wettest month with 73 mm of rain and partly cloudy skies.

69 Good

Comfort

16°
Feels Like Cool
16°C
Temperature
11° – 21°
79%
Humidity
Very Humid

Weather

73 mm
Rainfall
2.7 m/s
Wind
Calm
1.1
UV Index
High
18.1h daylight

August

August is cool with highs of 20°C and lows of 10°C. Moderate rainfall (72 mm) and partly cloudy skies.

67 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
10° – 20°
82%
Humidity
Very Humid

Weather

72 mm
Rainfall
2.6 m/s
Wind
Calm
0.8
UV Index
Moderate
15.6h daylight

September

September is cold with highs of 14°C and lows of 6°C. Moderate rainfall (57 mm) and mostly overcast skies.

57 Acceptable

Comfort

10°
Feels Like Cold
10°C
Temperature
6° – 14°
87%
Humidity
Very Humid

Weather

57 mm
Rainfall
2.9 m/s
Wind
Calm
0.4
UV Index
Low
12.7h daylight

October

October is cold with highs of 8°C and lows of 2°C. Moderate rainfall (58 mm) and mostly overcast skies.

48 Poor

Comfort

5°
Feels Like Cold
5°C
Temperature
2° – 8°
92%
Humidity
Very Humid

Weather

58 mm
Rainfall
3.1 m/s
Wind
Light Breeze
0.1
UV Index
Low
9.8h daylight

November

November is cold with highs of 3°C and lows of -2°C. Moderate rainfall (55 mm) and mostly overcast skies.

36 Poor

Comfort

0°
Feels Like Cold
0°C
Temperature
-2° – 3°
96%
Humidity
Very Humid

Weather

55 mm
Rainfall
3.2 m/s
Wind
Light Breeze
0.0
UV Index
Low
6.9h daylight

December

December is freezing with highs of 0°C and lows of -6°C. Moderate rainfall (45 mm) and mostly overcast skies.

35 Poor

Comfort

-4°
Feels Like Freezing
-4°C
Temperature
-7° – -1°
97%
Humidity
Very Humid

Weather

45 mm
Rainfall
3.1 m/s
Wind
Light Breeze
0.0
UV Index
Low
5.1h daylight

Nearby Attractions to Köyliönjärvi#

Kirkkokari
Kirkkokari
Small island in Satakunta coastal archipelago
Island 998 m