Hvalvatn

{{Short description|Lake in Iceland}}

{{Infobox lake

| name = Hvalvatn

| image = Iceland_from_above_III_(15432758870).jpg

| caption = Aerial photograph of the region: Hvalvatn near Hvalfell and in front of Botnssúlur; air pollution caused by Bárðarbunga eruptions (October 2014)

| image_bathymetry =

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| location =

| coords = {{coord|64|23|N|21|10|W|region:IS_type:waterbody|display=inline,title}}

| type =

| inflow =

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| catchment =

| basin_countries = Iceland

| length =

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| area = {{convert|4.1|km2|abbr=on}}

| depth =

| max-depth = {{convert|180|m|abbr=on}}

| volume =

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| shore =

| elevation = {{convert|378|m|abbr=on}}

| islands =

| cities =

| pushpin_map = Iceland

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| pushpin_map_alt = Location of Hvalvatn in Iceland.

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}}

The lake Hvalvatn ({{IPA|is|ˈkʰvalˌvahtn̥|audio=Hvalvatn pronunciation.ogg}}) is situated east of Hvalfjörður in the western portion of Iceland. It lies to the east of the tuya Hvalfell {{IPA|is|ˈkʰvalˌfɛtl̥|}}. The surface measures {{convert|4.1|km2|abbr=on}}, and its greatest depth is {{convert|180|m|abbr=on}}.

Not far from Hvalvatn is Glymur, the second highest waterfall in the country. Hiking trails lead both to the lake and to the waterfall.