{"id":454,"date":"2026-01-07T21:33:07","date_gmt":"2026-01-07T21:33:07","guid":{"rendered":"https:\/\/thebackyardpondaz.com\/blog\/?p=454"},"modified":"2026-01-07T21:33:07","modified_gmt":"2026-01-07T21:33:07","slug":"can-koi-fish-survive-winter","status":"publish","type":"post","link":"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/","title":{"rendered":"Can Koi Fish Survive Winter?"},"content":{"rendered":"<p>[vc_row][vc_column][vc_column_text]Koi fish are tough, and they can survive and thrive in all sorts of temperatures. It is possible for you to make their lives easier, though, especially in the cold winter months.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=&#8221;.vc_custom_1557934592635{padding-bottom: 20px !important;}&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;623-878-6695&#8243; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-phone&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:tel%3A%2B1623-878-6695|||&#8221;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;Get a Quote&#8221; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-envelope-open&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:https%3A%2F%2Fthebackyardpondaz.com%2Fcontact.htm|||&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_68_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/#How_To_Help_Koi_Fish_Survive_The_Winter\" title=\"How To Help Koi Fish Survive The Winter\">How To Help Koi Fish Survive The Winter<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/#Ensure_Oxygen_Access\" title=\"Ensure Oxygen Access\">Ensure Oxygen Access<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/#Insulation\" title=\"Insulation\">Insulation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/#Feeding_Patterns\" title=\"Feeding Patterns\">Feeding Patterns<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/#Supercooling_Features\" title=\"Supercooling Features\">Supercooling Features<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/#How_To_Protect_Your_Koi_Pond_From_The_Cold\" title=\"How To Protect Your Koi Pond From The Cold\">How To Protect Your Koi Pond From The Cold<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"763\" data-end=\"802\"><span class=\"ez-toc-section\" id=\"How_To_Help_Koi_Fish_Survive_The_Winter\"><\/span>How To Help Koi Fish Survive The Winter<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"804\" data-end=\"1216\">Unlike northern climates where ponds freeze over, winter in the Valley means daytime highs in the 60s and 70s with chilly nights that can dip into the 30s.<\/p>\n<p data-start=\"804\" data-end=\"1216\">While you won\u2019t need to worry about thick ice, your koi will still experience changes in metabolism, appetite, and activity level as the water cools. Lower temperatures slow their digestive systems, so feeding and filtration must be adjusted accordingly.<\/p>\n<p data-start=\"804\" data-end=\"1216\">Whenever your Koi fish reside in an area capable of hitting some freezing temperatures, it&#8217;s crucial to address the following issues to keep them safe.<\/p>\n<h3 data-start=\"804\" data-end=\"1216\"><span class=\"ez-toc-section\" id=\"Ensure_Oxygen_Access\"><\/span>Ensure Oxygen Access<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The fish will still need oxygen in order to survive even in frozen ponds. Solid ice surfaces can deplete life-sustaining oxygen, which can ultimately lead to a significant loss of life in the winter.<\/p>\n<p>By installing a running water feature, aerator, or pond deicer, you&#8217;ll provide access to the air at the water&#8217;s surface. This can keep your fish alive.<\/p>\n<p>Pond deicers work by thawing a small portion of the surface, allowing air to penetrate into the water. However, these must be checked often to ensure they are functioning properly.<\/p>\n<p>Aerators operate by preventing the ice from completely covering the area directly above them. Running water features, meanwhile, work better than aerators, in most cases.<\/p>\n<h3 data-start=\"804\" data-end=\"1216\"><span class=\"ez-toc-section\" id=\"Insulation\"><\/span>Insulation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Surface freezing is usually fine for most ponds. How many inches down the pond freezes will definitely depend on the weather in your area. That&#8217;s why it is important to make sure your fish have enough room under the ice. Fish that are packed together too tightly could potentially run out of oxygen.<\/p>\n<p>The majority of these ponds that are built into the ground will be well-insulated by the surrounding soil. Above-ground ponds are more at risk of deep freezing. It&#8217;s suggested to wrap insulation, blankets, or dirt around any exposed walls.<\/p>\n<h3 data-start=\"804\" data-end=\"1216\"><span class=\"ez-toc-section\" id=\"Feeding_Patterns\"><\/span>Feeding Patterns<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1257\" data-end=\"1698\">As pond water temperatures drop below 60\u00b0F, your koi\u2019s metabolism slows. They won\u2019t be able to digest high-protein foods the way they do in summer. Switch to a wheat germ\u2013based or easily digestible cool-water formula and reduce feeding frequency.<\/p>\n<p data-start=\"1257\" data-end=\"1698\">Once water dips below 50\u00b0F, it\u2019s best to stop feeding altogether until spring. Overfeeding in cool water leads to waste buildup and stressed fish, so less is definitely more this time of year.<\/p>\n<h3 data-start=\"804\" data-end=\"1216\"><span class=\"ez-toc-section\" id=\"Supercooling_Features\"><\/span>Supercooling Features<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When air is exposed to very cold temperatures, it can supercool a pond by rapidly dropping the temperature of the water. This commonly happens as the sun is going down.<\/p>\n<p>A rapid decrease in temperature can harm or even kill Koi fish. If you have a tall water feature, try to bypass it during the extreme cold.<\/p>\n<h2 data-start=\"2734\" data-end=\"2775\"><span class=\"ez-toc-section\" id=\"How_To_Protect_Your_Koi_Pond_From_The_Cold\"><\/span>How To Protect Your Koi Pond From The Cold<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2777\" data-end=\"2898\">While Phoenix rarely sees hard freezes, the occasional frosty night can happen. To protect your koi during a cold snap:<\/p>\n<ul data-start=\"2900\" data-end=\"3218\">\n<li data-start=\"2900\" data-end=\"2973\">\n<p data-start=\"2902\" data-end=\"2973\">Keep a floating pond thermometer handy to monitor water temperatures.<\/p>\n<\/li>\n<li data-start=\"2974\" data-end=\"3093\">\n<p data-start=\"2976\" data-end=\"3093\">Use a floating de-icer or pond heater only if temperatures are expected to dip below freezing for extended periods.<\/p>\n<\/li>\n<li data-start=\"3094\" data-end=\"3218\">\n<p data-start=\"3096\" data-end=\"3218\">Covering your pond with a shade sail or temporary cover on the coldest nights can also help buffer against sudden drops.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3251\" data-end=\"3611\">If you have aquatic plants like lilies or marginal grasses, trim back dead growth to keep it from decaying in the water. Many desert-friendly pond plants go dormant in winter, so don\u2019t worry if they look a little lackluster\u2014they\u2019ll bounce back in spring. Around the pond, rake up any fallen leaves or debris to reduce extra organic matter entering the water.<\/p>\n<p>Phoenix Area Pond Supply<\/p>\n<p>If you are looking for live fish, live plants, pond filtration, pumps, or anything else you need to start or care for your water garden or garden pond The Backyard Pond has everything you need. We serve residents of the greater Phoenix area with the best selection of Koi, plants, and all the supplies you need. <a href=\"https:\/\/goo.gl\/maps\/F1wCicK23zz\">Stop by<\/a> or give us a call at <a href=\"tel:+1-623-878-6695\">623-878-6695<\/a>\u00a0with your questions.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=&#8221;.vc_custom_1557934592635{padding-bottom: 20px !important;}&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;623-878-6695&#8243; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-phone&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:tel%3A%2B1623-878-6695|||&#8221;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;Get a Quote&#8221; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-envelope-open&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:https%3A%2F%2Fthebackyardpondaz.com%2Fcontact.htm|||&#8221;][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text]Koi fish are tough, and they can survive and thrive in all sorts of temperatures. It is possible for you to make their lives easier, though, especially in the cold winter months.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=&#8221;.vc_custom_1557934592635{padding-bottom: 20px !important;}&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;623-878-6695&#8243; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-phone&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:tel%3A%2B1623-878-6695|||&#8221;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;Get a Quote&#8221; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-envelope-open&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:https%3A%2F%2Fthebackyardpondaz.com%2Fcontact.htm|||&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text] &hellip; <a href=\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Can Koi Fish Survive Winter?<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":327,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Can Koi Fish Survive Winter? - The Backyard Pond Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Can Koi Fish Survive Winter? - The Backyard Pond Blog\" \/>\n<meta property=\"og:description\" content=\"[vc_row][vc_column][vc_column_text]Koi fish are tough, and they can survive and thrive in all sorts of temperatures. It is possible for you to make their lives easier, though, especially in the cold winter months.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=&#8221;.vc_custom_1557934592635{padding-bottom: 20px !important;}&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;623-878-6695&#8243; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-phone&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:tel%3A%2B1623-878-6695|||&#8221;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;Get a Quote&#8221; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-envelope-open&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:https%3A%2F%2Fthebackyardpondaz.com%2Fcontact.htm|||&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text] &hellip; Continue reading Can Koi Fish Survive Winter?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/\" \/>\n<meta property=\"og:site_name\" content=\"The Backyard Pond Blog\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-07T21:33:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thebackyardpondaz.com\/blog\/wp-content\/uploads\/2023\/01\/How-Deep-Should-A-Koi-Pond-Be.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"webtechs\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"webtechs\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/\",\"url\":\"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/\",\"name\":\"Can Koi Fish Survive Winter? 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It is possible for you to make their lives easier, though, especially in the cold winter months.[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=&#8221;.vc_custom_1557934592635{padding-bottom: 20px !important;}&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;623-878-6695&#8243; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-phone&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:tel%3A%2B1623-878-6695|||&#8221;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_btn title=&#8221;Get a Quote&#8221; style=&#8221;flat&#8221; align=&#8221;center&#8221; i_icon_fontawesome=&#8221;fa fa-envelope-open&#8221; button_block=&#8221;true&#8221; add_icon=&#8221;true&#8221; link=&#8221;url:https%3A%2F%2Fthebackyardpondaz.com%2Fcontact.htm|||&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text] &hellip; Continue reading Can Koi Fish Survive Winter?","og_url":"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/","og_site_name":"The Backyard Pond Blog","article_published_time":"2026-01-07T21:33:07+00:00","og_image":[{"width":1200,"height":900,"url":"https:\/\/thebackyardpondaz.com\/blog\/wp-content\/uploads\/2023\/01\/How-Deep-Should-A-Koi-Pond-Be.jpg","type":"image\/jpeg"}],"author":"webtechs","twitter_card":"summary_large_image","twitter_misc":{"Written by":"webtechs","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/","url":"https:\/\/thebackyardpondaz.com\/blog\/can-koi-fish-survive-winter\/","name":"Can Koi Fish Survive Winter? 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