Avatiu Stream

{{Use dmy dates|date=February 2023}}

{{Infobox river

| name = Avatiu Stream

| image =

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| map =

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| pushpin_map = Pacific Ocean

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| pushpin_map_caption= Location of mouth

| pushpin_map_alt = Cook Islands

| source1_location =

| source1_coordinates = {{Coord|21|13|45.55|S|159|47|57.04|W|display=inline}}

| mouth_location =

| mouth_coordinates = {{Coord|21|12|14.06|S|159|46|55.61|W|display=it}}

| subdivision_type1 = Country

| subdivision_name1 = Cook Islands

| length = {{Convert|4.85|km|mi|abbr=on}}

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| mouth_elevation = {{convert|0|m|ft|abbr=on}}

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The Avatiu Stream is the largest watercourse on Rarotonga. It rises in the central mountains beneath Te Rua Manga and flows north to the sea at Avatiu. The stream flows at a constant grade of 4.5% and has a length of {{Convert|4.85|km|mi|abbr=on}}.{{cite web |url=http://www.pacificwater.org/_resources/article/files/Cook%20Islands.pdf |title=CATALOGUE OF RIVERS FOR PACIFIC ISLANDS: COOK ISLANDS |publisher=Pacific Water |page=11 |date= |accessdate=24 July 2020}}

In 2018 a heavy downpour caused the stream to overflow its banks and flood businesses in Avatiu.{{cite web |url=http://www.cookislandsnews.com/item/68690-govts-blamed-for-flooding/68690-govts-blamed-for-flooding |title=Govts blamed for flooding |author=Rashneel Kumar |publisher=Cook Islands News |date=11 April 2018 |accessdate=24 July 2020}} In July 2020 the stream dried up due to low rainfall.{{cite web |url=http://www.cookislandsnews.com/national/environment/item/77606-lagoons-pristine-streams-stagnant |title=Lagoons pristine, streams stagnant |author=Losirene Lacanivalu |publisher=Cook Islands News |date=1 July 2020 |accessdate=24 July 2020}}