{"id":5059,"date":"2025-12-16T12:50:20","date_gmt":"2025-12-16T12:50:20","guid":{"rendered":"https:\/\/crowle.org\/?p=5059"},"modified":"2025-12-16T12:50:20","modified_gmt":"2025-12-16T12:50:20","slug":"trent-aegir-predictions-2025","status":"publish","type":"post","link":"https:\/\/crowle.org\/?p=5059","title":{"rendered":"When and Where to See the Trent Aegir: A Complete Guide"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"741\" height=\"274\" src=\"https:\/\/crowle.org\/wp-content\/uploads\/2019\/03\/Aegir-2019-03-24-2.png\" alt=\"\" class=\"wp-image-4830\" srcset=\"https:\/\/crowle.org\/wp-content\/uploads\/2019\/03\/Aegir-2019-03-24-2.png 741w, https:\/\/crowle.org\/wp-content\/uploads\/2019\/03\/Aegir-2019-03-24-2-300x111.png 300w\" sizes=\"auto, (max-width: 741px) 100vw, 741px\" \/><figcaption class=\"wp-element-caption\">Trent Aegir<\/figcaption><\/figure>\n\n\n\n<p>More about the Trent Aegir can be found on&nbsp;<a href=\"https:\/\/crowle.org\/?p=4724\">this page<\/a><\/p>\n\n\n\n<p><strong>TAKE CARE<\/strong><br>The River Trent has steep banks \u2013 ensure that you take care of your personal safety and donot take risks trying to get a good view.<\/p>\n\n\n\n<p>The Trent Aegir, also known as the&nbsp;Eagre, is a tidal bore on the River Trent. At certain times of the year, it is possible to see a bore of up to five feet high.<\/p>\n\n\n\n<p>The Aegir occurs when a high spring tide meets the downstream flow of the river forcing it back and causing a wave to flow upstream. Typically it is possible to see the bore from Derrythorpe to as far up the river as Gainsborough. Beyond&nbsp;Gainsborough&nbsp;the bore is reduced to a ripple.<\/p>\n\n\n\n<p>The best places to see the Aegir are at Gainsborough, Morton, East Stockwith, West Stockwith, and Owston Ferry.<\/p>\n\n\n\n<p>The appearance of a bore can be affected by various other factors that may enhance or detract from the size of the bore;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>excessive flood water flowing down the river will reduce the size of the bore<\/li>\n\n\n\n<li>too little water flowing down the river will also reduce the size of the Aegir<\/li>\n\n\n\n<li>depending on the wind direction winds may enhance or detract from the size of the Aegir<\/li>\n\n\n\n<li>lighting may also affect how the Aegir is perceived \u2013 in my experience, it looks best when the sun is behind the river<\/li>\n\n\n\n<li>depending on the weather conditions the Aegir can be up to 30 minutes earlier than predicted.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-vivid-red-color has-text-color\"><strong>To help me improve my predictions I should be grateful if you could email me (angus@townley.com) with details of actual times and appearances of the Aegir. Don\u2019t forget to say where you were. Many thanks.<\/strong><\/p>\n\n\n\n<p>Also please feel free to share photos and reports of the aegir below.<\/p>\n\n\n\n<p class=\"has-luminous-vivid-amber-background-color has-background\">BEAR in mind that these are predictions and natural phenomena do not work to an exact timetable and for the reasons listed above&nbsp;<strong>the Aegir can arrive up to 30 minutes earlier than predicted.<\/strong>&nbsp;Be early to increase your chances of seeing it.<\/p>\n\n\n<div class=\"wp-block-image is-style-default\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/crowle.org\/wp-content\/uploads\/2025\/01\/Aegir-2026-scaled.png\"><img loading=\"lazy\" decoding=\"async\" width=\"453\" height=\"1024\" src=\"https:\/\/crowle.org\/wp-content\/uploads\/2025\/01\/Aegir-2026-453x1024.png\" alt=\"\" class=\"wp-image-5115\" style=\"aspect-ratio:0.365234375;object-fit:contain\" srcset=\"https:\/\/crowle.org\/wp-content\/uploads\/2025\/01\/Aegir-2026-453x1024.png 453w, https:\/\/crowle.org\/wp-content\/uploads\/2025\/01\/Aegir-2026-133x300.png 133w, https:\/\/crowle.org\/wp-content\/uploads\/2025\/01\/Aegir-2026-768x1737.png 768w, https:\/\/crowle.org\/wp-content\/uploads\/2025\/01\/Aegir-2026-679x1536.png 679w, https:\/\/crowle.org\/wp-content\/uploads\/2025\/01\/Aegir-2026-906x2048.png 906w, https:\/\/crowle.org\/wp-content\/uploads\/2025\/01\/Aegir-2026-scaled.png 1132w\" sizes=\"auto, (max-width: 453px) 100vw, 453px\" \/><\/a><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">How are these calculated?<\/h2>\n\n\n\n<p>The forecast uses the approach that the Environment Agency used to use. <\/p>\n\n\n\n<p>As I can only get annual data for Keadby the predictions are based using tide times at Keadby.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>River Trent Aegir Predictions<\/strong><\/li>\n\n\n\n<li>From the River Trent tidal predictions, when they are published:<\/li>\n\n\n\n<li>Use KEADBY levels. Metres AOD<\/li>\n\n\n\n<li>Use Gainsborough times, GMT<\/li>\n\n\n\n<li>If Gainsborough time is not available, an estimate can be calculated by taking the Keadby time and adding 1h 05m +\/- 5mins<\/li>\n\n\n\n<li>Aegir time is GMT time at Gainsborough minus 2 hours eg. 21:00 high tide = 19:00 Aegir prediction.<\/li>\n\n\n\n<li>Prospect predictions:\n<ul class=\"wp-block-list\">\n<li>Small 4.50 to 4.69 metres AOD *<\/li>\n\n\n\n<li>Medium 4.70 to 4.89 metres AOD **<\/li>\n\n\n\n<li>Large 4.90 to 5.09 metres AOD ***<\/li>\n\n\n\n<li>Extra Large 5.10 to 5.30 metres AOD ****<\/li>\n\n\n\n<li>5 Star 5.40 metres AOD and above. <strong>*****<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>If you are interested: I use a power query routine in excel to read the data from the tide tables and to calculate the forecasts.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>More about the Trent Aegir can be found on&nbsp;this page TAKE CAREThe River Trent has steep banks \u2013 ensure that you take care of your personal safety and donot take risks trying to get a good view. The Trent Aegir, also known as the&nbsp;Eagre, is a tidal bore on the River Trent. At certain times [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[52],"tags":[],"class_list":["post-5059","post","type-post","status-publish","format-standard","hentry","category-river-trent"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/crowle.org\/index.php?rest_route=\/wp\/v2\/posts\/5059","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/crowle.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/crowle.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/crowle.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/crowle.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5059"}],"version-history":[{"count":10,"href":"https:\/\/crowle.org\/index.php?rest_route=\/wp\/v2\/posts\/5059\/revisions"}],"predecessor-version":[{"id":5119,"href":"https:\/\/crowle.org\/index.php?rest_route=\/wp\/v2\/posts\/5059\/revisions\/5119"}],"wp:attachment":[{"href":"https:\/\/crowle.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5059"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/crowle.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5059"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/crowle.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5059"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}