{"id":70134,"date":"2026-08-08T07:14:47","date_gmt":"2026-08-08T05:14:47","guid":{"rendered":"https:\/\/www.sea-help.eu\/?p=70134"},"modified":"2026-08-08T07:15:15","modified_gmt":"2026-08-08T05:15:15","slug":"weather-halo-ring-around-the-sun","status":"publish","type":"post","link":"https:\/\/www.sea-help.eu\/en\/this-that\/weather-halo-ring-around-the-sun\/","title":{"rendered":"<span class=\"dachzeile\">The Ring Around the Sun <span>: <\/span><\/span>Why Skippers Shouldn&#8217;t Ignore a Halo"},"content":{"rendered":"<p><strong>Lake P\u00e4ij\u00e4nne showed itself from its best side. Deep blue sky, hardly a cloud, pleasant temperatures and a steady breeze of about three on the Beaufort scale \u2013 ideal sailing weather. In our small boat, we cruised along the <a title=\"Wikipedia: Ruovesi (Lake) - Salonsaari Island\" href=\"https:\/\/de.wikipedia.org\/wiki\/Ruovesi_(See)\" target=\"_blank\" rel=\"nofollow noopener\">southeastern tip of Finland&#8217;s largest lake, past the island of Salonsaari<\/a>. The water sparkled, the wind sat cleanly in the sail, and nothing suggested that the weather would soon change dramatically.<\/strong><\/p>\n<p>&nbsp;<\/p>\n<div id='gallery-1' class='gallery galleryid-70134 gallery-columns-2 gallery-size-medium'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href=\"https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_02.jpg\"><img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"563\" src=\"https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_02-750x563.jpg\" class=\"attachment-medium size-medium\" alt=\"Salonsaari Island\" aria-describedby=\"gallery-1-70132\" srcset=\"https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_02-750x563.jpg 750w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_02-1200x900.jpg 1200w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_02-768x576.jpg 768w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_02-1536x1152.jpg 1536w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_02-2048x1536.jpg 2048w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_02-1140x855.jpg 1140w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-70132'>\n\t\t\t\t<span class=\"copy-span-inline\"><span>&copy; muencheberg.media<\/span><\/span>\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href=\"https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_01.jpg\"><img decoding=\"async\" width=\"750\" height=\"563\" src=\"https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_01-750x563.jpg\" class=\"attachment-medium size-medium\" alt=\"Salonsaari Island\" aria-describedby=\"gallery-1-70133\" srcset=\"https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_01-750x563.jpg 750w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_01-1200x900.jpg 1200w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_01-768x576.jpg 768w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_01-1536x1152.jpg 1536w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_01-2048x1536.jpg 2048w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-17_seahelp-news_halo_ring-um-die-sonne_wetter_01-1140x855.jpg 1140w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-70133'>\n\t\t\t\t<span class=\"copy-span-inline\"><span>&copy; muencheberg.media<\/span><\/span>\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n<p>&nbsp;<\/p>\n<p>The next morning, from the jetty of our m\u00f6kki, we noticed an unusual natural phenomenon. High above the lake, the sun hung within an almost perfectly circular ring of light \u2013 an impressive <a title=\"Wikipedia: Halo\" href=\"https:\/\/de.wikipedia.org\/wiki\/Halo_(Lichteffekt)\" target=\"_blank\" rel=\"noopener\">halo<\/a>. For many holidaymakers, this is simply a fascinating photo opportunity. Experienced skippers, however, know better: a ring like this in the sky is often more than just a visual effect. It frequently signals an approaching change in the weather.<\/p>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_70130\" aria-describedby=\"caption-attachment-70130\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-1200x1200.jpg\"><img decoding=\"async\" class=\"size-large wp-image-70123\" src=\"https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-1200x1200.jpg\" alt=\"HALO - Ring Around the Sun\" width=\"800\" height=\"800\" srcset=\"https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-1200x1200.jpg 1200w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-750x750.jpg 750w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-250x250.jpg 250w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-768x768.jpg 768w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-1536x1536.jpg 1536w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-2048x2048.jpg 2048w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-75x75.jpg 75w, https:\/\/www.sea-help.eu\/wp-content\/uploads\/2026-07-18_seahelp-news_halo_ring-um-die-sonne_wetter_03-1140x1140.jpg 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a><figcaption id=\"caption-attachment-70130\" class=\"wp-caption-text\"><span class=\"copy-span-inline\">\u00a9 muencheberg.media<\/span><\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<p>And that&#8217;s exactly what happened this time. Just one day later, the picture had changed completely. Dense clouds rolled in, rain began to fall, the wind picked up noticeably, and patches of fog formed over the water. Within a short time, the sunny summer day had turned into typical bad weather. Coincidence? Not at all.<\/p>\n<h2>What Exactly Is a Halo?<\/h2>\n<p>A halo doesn&#8217;t form in low-lying rain clouds, but at high altitude \u2013 usually between six and twelve kilometres above the earth. Up there, gossamer-thin veil clouds known as cirrostratus clouds drift across the sky. They are made up not of water droplets, but of countless tiny ice crystals.<\/p>\n<p>When sunlight passes through these hexagonal crystals, it is refracted and partly reflected, much like in a prism. The result is the familiar ring of light around the sun, usually around 22 degrees in radius. Under favourable conditions, bright light spots (&#8220;sun dogs&#8221;), coloured arcs or other halo phenomena can also become visible.<\/p>\n<p>Meteorologically speaking, it&#8217;s not so much the halo itself that matters, but the clouds that create it.<\/p>\n<h2>Why Is the Halo Considered a Weather Messenger?<\/h2>\n<p>Cirrostratus clouds are often the vanguard of an approaching warm front. The sun may still be shining unhindered, but several kilometres up, the atmosphere is already changing. The thin ice clouds are often followed first by denser cloud layers, then by rain or more prolonged precipitation. At the same time, the wind frequently picks up.<\/p>\n<p><strong>That&#8217;s why a simple sailor&#8217;s rule has held true for centuries:<\/strong> a ring around the sun or moon often means the weather is on the move. Or, as the old sayings go: &#8220;A ring around the sun means water in the barrel&#8221; and &#8220;If the sun wears a ring, the wind will soon do its thing&#8221;.<\/p>\n<p>However, it isn&#8217;t quite that simple. A halo doesn&#8217;t guarantee a change in the weather. Especially in winter or during stable high-pressure conditions, halos can occur without bad weather following immediately. In Central Europe and the Nordic countries, though, they surprisingly often precede a frontal system \u2013 frequently by twelve to 48 hours.<\/p>\n<h2>Why Recreational Skippers Should Pay Attention<\/h2>\n<p>For watersports enthusiasts, this lead time is especially valuable. While wind and waves still appear harmless, the atmosphere is already offering early clues to an approaching change in the weather.<\/p>\n<p><strong>Anyone who spots a clearly defined halo while out on the water should therefore consider the following:<\/strong><\/p>\n<ul>\n<li>Is there still enough of a weather window for the planned trip?<\/li>\n<li>Is there a safe harbour or anchorage along the route?<\/li>\n<li>Are current weather reports available?<\/li>\n<li>Should the crew prepare for increasing wind or worsening visibility?<\/li>\n<\/ul>\n<p>Especially on large inland waters such as Finland&#8217;s Lake P\u00e4ij\u00e4nne, but equally on the North Sea, the Baltic or the Mediterranean, weather conditions can deteriorate far more quickly than a cloudless sky might initially suggest.<\/p>\n<h2>A Halo Is No Substitute for a Weather Forecast<\/h2>\n<p>As reliable as the halo can be as an indicator, it doesn&#8217;t replace a weather forecast. Modern weather models, apps, onboard electronics or <a title=\"VHF radio (marine radio) on yachts: new digital data exchange system VDES is coming\" href=\"https:\/\/www.sea-help.eu\/en\/exclamation-test-technology\/ukw-radio-sea-vdes\/\" target=\"_blank\" rel=\"noopener\">VHF marine weather reports<\/a> provide far more precise information on wind direction, wind speed and precipitation.<\/p>\n<p>Even so, the halo remains a remarkable example of just how much can be read directly from the sky. Long before satellite images or weather apps were available, fishermen, sailors and farmers observed such phenomena closely. Many of their rules of thumb are based on surprisingly precise meteorological relationships.<\/p>\n<h2>A Glance Upwards Is Worth It<\/h2>\n<p>Our sailing trip on Lake P\u00e4ij\u00e4nne began with one of those perfect summer days when you believe the fine weather will last forever. The halo the following morning, however, reminded us that the atmosphere plays by its own rules.<\/p>\n<p>For recreational skippers, the glowing ring is therefore far more than a spectacular sight. It&#8217;s a free weather tip from nature \u2013 one worth knowing. After all, anyone who watches the sky closely sometimes gains exactly the hours of lead time that can make all the difference out on the water.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lake P\u00e4ij\u00e4nne showed itself from its best side. Deep blue sky, hardly a cloud, pleasant temperatures and a steady breeze of about three on the Beaufort scale \u2013 ideal sailing weather. In our small boat, we cruised along the southeastern tip of Finland&#8217;s largest lake, past the island of Salonsaari. The water sparkled, the wind [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":70131,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[575],"tags":[181],"class_list":["post-70134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-this-that","tag-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/posts\/70134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/comments?post=70134"}],"version-history":[{"count":1,"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/posts\/70134\/revisions"}],"predecessor-version":[{"id":70194,"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/posts\/70134\/revisions\/70194"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/media\/70131"}],"wp:attachment":[{"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/media?parent=70134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/categories?post=70134"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sea-help.eu\/en\/wp-json\/wp\/v2\/tags?post=70134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}