Lake Sarnen

Lake Alpine lake near Sarnen with scenic mountain surroundings

Lake Sarnen in Obwalden lies beneath alpine ridges and is framed by the town of Sarnen; visitors use it for swimming, sailing and hikes into nearby mountain trails.

Main image

Lake Sarnen (Sarnersee) is a small lake in the canton of Obwalden in central Switzerland, located beside the town of Sarnen. It is a locally important recreational lake set within a compact alpine foothill landscape.

Shoreline paths and promenades near the town allow walking and cycling; local operators run short passenger boats and small-boat rentals in season. Mountains and hills rise close to the lake, giving readily accessible viewpoints within a few kilometers of the shore.

The lake is of postglacial origin and has long been used by nearby communities for fishing and transport on a local scale. Modern amenities along the shore developed in the 19th and 20th centuries as Sarnen grew as a regional centre.

Geographically it lies in central Switzerland, immediately adjacent to the town of Sarnen in Obwalden, roughly in the Lucerne-Interlaken part of the country. The surrounding landscape is a mix of lakeshore settlements, farmland and low alpine hills.

  • Access: Sarnen town sits at the northern end of the lake and provides the main access points, including lakeside promenades and boat landings.
  • Viewing tips: Best light for photos is generally in the morning or late afternoon when low sun highlights the surrounding foothills.
Lake Sarnen
Sarnen, Obwalden, Switzerland
46.8668, 8.2167
Open public area (24 hours)
Free

How to Get to Lake Sarnen #

SBB trains run to Sarnen station from Lucerne (about 30 minutes) and from Interlaken direction via Luzern connections. The station is a 10-15 minute walk to the lakeside promenade. Driving: follow A8 and local roads into Sarnen; parking is available near the center.

Tips for Visiting Lake Sarnen #

  • Take the short walk up to Sarnen's town center for a clockwise view of the lake - the train station is only a 10-15 minute walk.
  • Rent a bike to follow the lakeside paths; the route to Giswil has fine views of the lake and the mountains beyond.
  • Visit on a weekday morning for mirror-like water and fewer day-trippers from Lucerne.

Best Time to Visit Lake Sarnen #

Summer and early autumn are best for activities and views; winter is quiet and atmospheric but conditions can be icy.

Summer
June-August · 15-25°C (59-77°F)
Pleasant waterside weather, excellent for boating and cycling.
Autumn
September-October · 5-15°C (41-59°F)
Crisp air and fewer tourists; the surrounding hills begin to color.
Winter
December-February · -5-5°C (23-41°F)
Cold, quiet; frozen sections are possible but not guaranteed - check local guidance before attempting ice activities.

Weather & Climate near Lake Sarnen #

Climate

Lake Sarnen's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in July) and cold winters (coldest in January). Temperatures range from -2°C to 24°C. Abundant rainfall (1337 mm/year), wettest in June.

Best Time to Visit
JulyAugustSeptember
Temperature & Rainfall
Temperature Range
32°
Warmest Month
-24°
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 4°C and lows of -2°C. Regular rainfall (85 mm) and partly cloudy skies.

45 Poor

Comfort

Feels Like Cold
C
Temperature
-2°
83%
Humidity
Very Humid

Weather

85 mm
Rainfall
1.6 m/s
Wind
Calm
0.2
UV Index
Low
8.9h daylight

February

February is cold with highs of 6°C and lows of -2°C. Regular rainfall (93 mm) and partly cloudy skies.

45 Poor

Comfort

Feels Like Cold
C
Temperature
-2°
82%
Humidity
Very Humid

Weather

93 mm
Rainfall
1.9 m/s
Wind
Calm
0.3
UV Index
Low
10.2h daylight

March

March is cold with highs of 10°C and lows of 1°C. Regular rainfall (95 mm) and partly cloudy skies.

55 Acceptable

Comfort

Feels Like Cold
C
Temperature
11°
81%
Humidity
Very Humid

Weather

95 mm
Rainfall
2.2 m/s
Wind
Calm
0.7
UV Index
Moderate
11.8h daylight

April

April is cold with highs of 14°C and lows of 4°C. Significant rainfall (102 mm) and mostly overcast skies.

49 Poor

Comfort

Feels Like Cold
C
Temperature
14°
78%
Humidity
Very Humid

Weather

102 mm
Rainfall
2.1 m/s
Wind
Calm
1.0
UV Index
High
13.4h daylight

May

May is cool with highs of 19°C and lows of 8°C. Significant rainfall (121 mm) and mostly overcast skies.

59 Acceptable

Comfort

14°
Feels Like Cool
14°C
Temperature
19°
78%
Humidity
Very Humid

Weather

121 mm
Rainfall
2.0 m/s
Wind
Calm
1.3
UV Index
High
14.8h daylight

June

June is cool with highs of 21°C and lows of 11°C. The wettest month with heavy rain (152 mm) and mostly overcast skies.

57 Acceptable

Comfort

16°
Feels Like Cool
16°C
Temperature
11° 21°
78%
Humidity
Very Humid

Weather

152 mm
Rainfall
1.9 m/s
Wind
Calm
1.7
UV Index
Very High
15.6h daylight

July

July is the warmest month with highs of 24°C and lows of 13°C. Significant rainfall (147 mm) and partly cloudy skies.

71 Very Good

Comfort

19°
Feels Like Mild
19°C
Temperature
13° 24°
77%
Humidity
Very Humid

Weather

147 mm
Rainfall
1.9 m/s
Wind
Calm
1.7
UV Index
Very High
15.2h daylight

August

August is mild with highs of 23°C and lows of 13°C. Significant rainfall (150 mm) and partly cloudy skies.

69 Good

Comfort

18°
Feels Like Mild
18°C
Temperature
13° 23°
78%
Humidity
Very Humid

Weather

150 mm
Rainfall
1.7 m/s
Wind
Calm
1.4
UV Index
High
14.0h daylight

September

September is cool with highs of 20°C and lows of 10°C. Regular rainfall (99 mm) and partly cloudy skies.

65 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
10° 20°
80%
Humidity
Very Humid

Weather

99 mm
Rainfall
1.6 m/s
Wind
Calm
1.0
UV Index
Moderate
12.4h daylight

October

October is cool with highs of 14°C and lows of 6°C. Regular rainfall (98 mm) and partly cloudy skies.

57 Acceptable

Comfort

10°
Feels Like Cool
10°C
Temperature
14°
81%
Humidity
Very Humid

Weather

98 mm
Rainfall
1.5 m/s
Wind
Calm
0.5
UV Index
Low
10.7h daylight

November

November is cold with highs of 8°C and lows of 1°C. Significant rainfall (102 mm) and partly cloudy skies.

45 Poor

Comfort

Feels Like Cold
C
Temperature
84%
Humidity
Very Humid

Weather

102 mm
Rainfall
1.6 m/s
Wind
Calm
0.2
UV Index
Low
9.3h daylight

December

December is cold with highs of 4°C and lows of -1°C. Regular rainfall (93 mm) and partly cloudy skies.

45 Poor

Comfort

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

Weather

93 mm
Rainfall
1.7 m/s
Wind
Calm
0.1
UV Index
Low
8.5h daylight

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