Lake Sempach

{{Short description|Lake in Switzerland}}

{{Infobox body of water

| name = Lake Sempach

| other_name = Sempachersee

| image = Picswiss LU-20-42.jpg

| caption =

| image_bathymetry =

| caption_bathymetry =

| location = Canton of Lucerne

| coords = {{coord|47|8.6667|N|8|9.1|E|region:CH-LU_type:waterbody|display=inline,title}}

| type =

| inflow = Gross Aa, Chli Aa (Sempachersee), Meierhofbach, Wilibach, Dorfbach (Sempachersee), Brandbach, Röllbach (Sempachersee), Lipperütibach, and some unnamed

| outflow = Suhre

| catchment =

| basin_countries = Switzerland

| length =

| width =

| area = {{convert|14.5|km2|abbr=on}}

| depth = {{convert|44|m|abbr=on}}

| max-depth = {{convert|87|m|abbr=on}}

| volume = {{convert|0.66|km3|acre.ft|abbr=on}}

| residence_time = 16.9 years

| shore =

| elevation = {{convert|503.77|m|abbr=on}}

| islands = Gamma Insel

| cities = Sursee, Sempach

| pushpin_map=Canton of Lucerne#Switzerland#Alps

| pushpin_label_position= bottom

| embedded = {{Infobox mapframe |wikidata=yes |zoom=12 |coord={{WikidataCoord|display=i}}}}

}}

__NOTOC__

Lake Sempach (German: Sempachersee) is a lake in the canton of Lucerne, Switzerland. Its area is about {{convert|14.5|km2|abbr=on}} and its maximum depth is {{convert|87|m|ft|abbr=on}}.

A {{convert|50|m|ft|adj=mid|-large}} island named Gamma Insel is located east of Sursee.

In the 17th century the lake counted with five ferries, that brought goods to the weekly market in Sursee.{{Cite book |last=Waldis |first=Alfred |title=Es begann am Gotthard |publisher=Maihof Verlag |year=2002 |isbn=3-95220335-1 |location=Lucerne |pages=48}}

Many inhabitants of local areas swim, boat, paddle, and fish in Lake Sempach, due to its ease of accessibility.