A ''supermoon" will grace the skies this weekend, with the satellite expected to appear in its biggest and brightest form this year. The phenomenon, known as a perigee full moon, occurs when the Moon reaches its closest point to Earth. At this time it can appear up to 14% larger and 30% brighter than when it is farthest from the planet, experts said.

But skywatchers have been warned they may only have "fleeting" views tonight after weather forecasters predicted cloudy skies for most of the country. Billy Payne, forecaster at Meteogroup, the weather division of the Press Association, said: "There'll be a fair amount of cloud around tonight so we may see a few glimpses. It will be fleeting. By tomorrow night the area of low pressure will have moved to the east. The clearest skies will be across southern and western parts of England, although most places will have a good chance of a clear view."


The 'supermoon' seen from Edinburgh in 2012

The Moon is expected to appear at its best in the UK in the early hours of tomorrow morning, at around 4am, Dr Robert Massey, of the Royal Astronomical Society, said. UK skywatchers will then miss the Moon when it hits perigee, the point in its orbit when it is closest to Earth, which is expected at about midday on Sunday. At this stage, it will be around 360,000 km away - compared to 400,000 km at its farthest point.

The Moon will then appear bigger and brighter again on Sunday night. Dr Massey said: "'The eye is so good at compensating for changes in brightness that it may only appear a little brighter. 'What you may notice is that the Moon will be a little bit bigger.''

But he said it could still be worth glancing up at the skies tonight, adding: ''The Moon is always beautiful and a full moon is always dramatic.'' The Moon's distance from Earth varies because it follows an elliptical orbit rather than a circular one. Scientists have dismissed notions that the phenomenon could cause bizarre behaviour or natural disasters. Its most significant impact is likely to be on the tide. Experts say the next "supermoon" is expected to appear in August 2014.

Loading Slideshow...
  • Bailey Island, Maine

    View of the Bailey Island Cribstone Bridge and the supermoon.

  • SUPERMOON over Frankfurt ,Germany.

    <a href="http://www.huffingtonpost.com/social/Kevin_Kain"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/508059869/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Kevin_Kain">Kevin Kain</a>:<br />Big MOON over Frankensteiner Platz, Sachsenhausen-Nord, Frankfurt am Main. Frankfurt, Germany

  • Supermoon Over the Haight

    <a href="http://www.huffingtonpost.com/social/Susan_Leas_Latham"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/100000400611255/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Susan_Leas_Latham">Susan Leas Latham</a>:<br />Looking west from Stanyan and Page Street, San Francisco.

  • Super Moon & Sandhill Cranes

    <a href="http://www.huffingtonpost.com/social/imtruthmonger"><img style="float:left;padding-right:6px !important;" src="http://i.huffpost.com/profiles/955553-tiny.png?20101230100445" /></a><a href="http://www.huffingtonpost.com/social/imtruthmonger">imtruthmonger</a>:<br />Sandhill cranes traverse the face of the super moon. San Luis Valley, Colorado

  • moon over Arroyo Hondo Mesa, New Mexico

    <a href="http://www.huffingtonpost.com/social/Ron_Hagg"><img style="float:left;padding-right:6px !important;" src="http://s.huffpost.com/images/profile/user_placeholder.gif" /></a><a href="http://www.huffingtonpost.com/social/Ron_Hagg">Ron Hagg</a>:<br />Great to be here

  • A "supermoon" is seen above the Christ the Redeemer statue in Rio de Janeiro, Sunday, May 6, 2012. A supermoon is the coincidence of a full moon (or a new moon) with the closest approach the moon makes to the Earth. (AP Photo/Victor R. Caivano)

  • Super Moon Lake Havasu City

    <a href="http://www.huffingtonpost.com/social/Cory_Michael_Hall"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/1757992258/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Cory_Michael_Hall">Cory Michael Hall</a>:<br />Super Moon 2012 Lake Havasu City

  • The full moon rises behind the Temple of Poseidon in Cape Sounion, south east of Athens, Greece, while tourists watch, on Saturday, May 5, 2012. Saturday's event is a "supermoon," the closest and therefore the biggest and brightest full moon of the year. (AP Photo/Dimitri Messinis)

  • Moon Appears Bigger And Brighter, As Its Closer To Earth Than Normal

    PALM SPRINGS, CA - MAY 5: A perigee moon, or supermoon, rises behind wind turbines on May 5, 2012 near Palm Springs, California. The moon appears especially big and bright during this once-a-year cosmic event as the full moon is at its closest to the Earth in its elliptical orbit. The perigee side of its orbit is about 31,000 miles closer than the opposite, or apogee, side. The bright light of the full moon also hides all but the brightest meteors of the Eta Aquarid meteor shower, the remnant debris trail of Halley's Comet. (Photo by David McNew/Getty Images)

  • Big Moon Budapest

    Budapest Moon

  • A supermoon lights up Waikiki and Diamond Head Saturday, May 5, 2012, in Honolulu. A "supermoon" event happens when the moon is closest to the earth therefore the biggest and brightest full moon of the year. (AP Photo/Eugene Tanner)

  • Super Moon

    May 4, 2012 over Palmer Alaska

  • Dublin City, Ireland

    Supermoon over Marino, three miles north of Dublin City, Ireland. The small light is the top of the Spire monument on Dublin's O'Connell Street - in the centre of the city!

  • A fisherman casts a line from a jetty as the "supermoon" appears over the Atlantic Ocean, Saturday, May 5, 2012, near Bal Harbour, Fla. The moon was the closest it will get to the Earth this year _ and appeared 14 percent larger because of that. At its peak it was about 221,802 miles from Earth. (AP Photo/Wilfredo Lee)

  • The "supermoon" appears behind a steeple with crosses of an Orthodox church in the town of Novogrudok, 150 km (93 miles) west of Minsk, Belarus, late Saturday, May 5, 2012. The moon was the closest it will get to the Earth this year _ and appeared 14 percent larger because of that. At its peak it was about 221,802 miles from Earth. (AP Photo/Sergei Grits)

  • Moon over Pawtucket

    <a href="http://www.huffingtonpost.com/social/RobertinBeirut"><img style="float:left;padding-right:6px !important;" src="http://s.huffpost.com/images/profile/user_placeholder.gif" /></a><a href="http://www.huffingtonpost.com/social/RobertinBeirut">RobertinBeirut</a>:<br />This was taken from Central Falls, over the downtown area of Pawtucket, RI.

  • Super Moon in Chicagoland

    <a href="http://www.huffingtonpost.com/social/Druuna"><img style="float:left;padding-right:6px !important;" src="http://i.huffpost.com/profiles/1336379-2-tiny.png?20110427170134" /></a><a href="http://www.huffingtonpost.com/social/Druuna">Druuna</a>:<br />Super Moon May 5th, 2012 in Chicagoland

  • Hartsgrove, Ohio

  • Super moon Ft Smith AR

    <a href="http://www.huffingtonpost.com/social/Lodza"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/1284260836/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Lodza">Lodza</a>:<br />

  • Livermore, Maine

    Taken at moonrise.

  • The full moon rises behind Statue of Liberty replica atop of a hotel in Kosovo's capital Pristina on Saturday, May 5, 2012. On Saturday, the moon will be a "supermoon" or perigee moon as the moon is at it's closest approach to the earth. ( AP Photo / Visar Kryeziu )

  • Livermore, Maine

    Taken at moonrise.

  • Westhaven Supermoon

    <a href="http://www.huffingtonpost.com/social/Rob_Youngblood"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/1832788374/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Rob_Youngblood">Rob Youngblood</a>:<br />SuperMoon over Franklin, Tennessee

  • The full moon rises in the clouds behind statues of angels fixed at the St. Isaak's Cathedral in St.Petersburg, Russia, Saturday, May 5, 2012. Saturday's event is a "supermoon," the closest and therefore the biggest and brightest full moon of the year. (AP Photo/Dmitry Lovetsky)

  • Supermoon 2012

    <a href="http://www.huffingtonpost.com/social/JanetBS"><img style="float:left;padding-right:6px !important;" src="http://images.huffingtonpost.com/twitter_profile_img/3189175.png" /></a><a href="http://www.huffingtonpost.com/social/JanetBS">JanetBS</a>:<br />Supermoon over Northern VA breaking through the clouds.

  • Full Perigee Moon

    <a href="http://www.huffingtonpost.com/social/Joel_Caplan"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/883935213/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Joel_Caplan">Joel Caplan</a>:<br />From Savannah GA about 10:45 EDT

  • The "supermoon" appears over the landmark Chhatrapati Shivaji Terminus in Mumbai, India, Saturday, May 5, 2012. The moon was the closest it will get to the Earth this year _ and appeared 14 percent larger because of that. At its peak it was about 221,802 miles from Earth. (AP Photo/ Rajanish Kakade)

  • My #SuperMoon

    <a href="http://www.huffingtonpost.com/social/Thalin_Lea"><img style="float:left;padding-right:6px !important;" src="http://images.huffingtonpost.com/yahoo_profile_img/2244009.png" /></a><a href="http://www.huffingtonpost.com/social/Thalin_Lea">Thalin Lea</a>:<br />

  • Desert Moon, Yuma, Arizona

    <a href="http://www.huffingtonpost.com/social/jennahassan"><img style="float:left;padding-right:6px !important;" src="http://images.huffingtonpost.com/aol_profile_img/3189206.png" /></a><a href="http://www.huffingtonpost.com/social/jennahassan">jennahassan</a>:<br />And the desert whispered to the moon, "bring back the ocean."

  • The moon rises Ben Hill Griffin Stadium at the University of Florida in Gainesville Fla., on Saturday, May 5, 2012. (AP Photo/The Gainesville Sun, Matt Stamey)

  • Marino, Ireland

    Simone Rapple

  • Brookline, MA

    James Spear

  • Maple leaves are silhouetted by the "supermoon" in Spring Lake Township, Mich., Sunday, May 6, 2012. The moon was the closest it will get to the Earth this year _ and appeared 14 percent larger because of that. At its peak it was about 221,802 miles from Earth. (AP Photo/The Grand Rapids Press, Cory Morse) ALL LOCAL TV OUT; LOCAL TV INTERNET OUT

  • Chattanooga, TN

    Phyllis Scott

  • Charleston, S.C.

    Via Donna W.

  • The 'Supermoon" rises over the Angel's Gate lighthouse in San Pedro, Calif. Saturday night. The moon will come within about 221,802 miles (357,000 kilometers) from Earth. That's about 15,300 miles (24,600 kilometers) closer than average. (AP Photo/Chuck Bennett, Daily Breeze)

  • Leesburg, VA

    Leah Kosin <a href="http://leesburg.patch.com/" target="_hplink">Leesburg Patch</a>

  • Omaha, NE

    Via Pat.

  • Supermoon over Calais, Vermont

    <a href="http://www.huffingtonpost.com/social/vtphotoguy"><img style="float:left;padding-right:6px !important;" src="http://i.huffpost.com/profiles/320695-tiny.png?20100701232123" /></a><a href="http://www.huffingtonpost.com/social/vtphotoguy">vtphotoguy</a>:<br />Moonrise over the peaks of Plainfield, from nearby Calais, Vermont. Tim Seaver/Vermontphoto

  • Uppsala, Sweden

    <a href="http://www.huffingtonpost.com/social/Bjorn47"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/702667588/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Bjorn47">Bjorn47</a>:<br />Supermoon as seen from Uppsala, Sweden a few hours ago.

  • The "supermoon" appears over Vancouver, British Columbia Saturday May 5, 2012. The moon was the closest it will get to the Earth this year _ and appeared 14 percent larger because of that. At its peak it was about 221,802 miles from Earth. (AP Photo/The Canadian Press, Jonathan Hayward)

  • Supermoon

    <a href="http://www.huffingtonpost.com/social/Kari_Koji"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/100001947155004/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Kari_Koji">Kari Koji</a>:<br />Supermoon in Greeley, Colorado! Amazing

  • Cottonwood ARIZONA

    <a href="http://www.huffingtonpost.com/social/Richard_G_Bolt_Iii"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/1253949099/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Richard_G_Bolt_Iii">Richard G Bolt Iii</a>:<br />Supermoon 2012

  • #supermoon

    <a href="http://www.huffingtonpost.com/social/Ahura_Mazda"><img style="float:left;padding-right:6px !important;" src="http://images.huffingtonpost.com/yahoo_profile_img/1143523.png" /></a><a href="http://www.huffingtonpost.com/social/Ahura_Mazda">Ahura Mazda</a>:<br />

  • Montana Big Sky Country

    <a href="http://www.huffingtonpost.com/social/firewmn"><img style="float:left;padding-right:6px !important;" src="http://i.huffpost.com/profiles/258322-2-tiny.png?20100131224803" /></a><a href="http://www.huffingtonpost.com/social/firewmn">firewmn</a>:<br />Supermoon in the Big Sky...

  • Supermoon over Anglin's Fishing Pier

    <a href="http://www.huffingtonpost.com/social/Edward_Oest"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/100001892959705/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/Edward_Oest">Edward Oest</a>:<br />Supermoon over Anglin's Fishing Pier, Lauderdale-by-the-Sea, Florida. E Oest

  • from Andover. MA

    <a href="http://www.huffingtonpost.com/social/Teejaye46"><img style="float:left;padding-right:6px !important;" src="http://i.huffpost.com/profiles/2532006-tiny.png?20120409193947" /></a><a href="http://www.huffingtonpost.com/social/Teejaye46">Teejaye46</a>:<br />

  • Super Moon

    The moon rises over the Renkert Building, Saturday, May 5, 2012 in Canton, Ohio. The biggest and brightest full moon of the year arrives Saturday night as our celestial neighbor passes closer to Earth than usual. (AP Photo/The Repository, Scott Heckel) MANDATORY CREDIT

  • supermoon from tampa florida

    <a href="http://www.huffingtonpost.com/social/May_Lafranchi"><img style="float:left;padding-right:6px !important;" src="http://graph.facebook.com/1015404955/picture?type=square" /></a><a href="http://www.huffingtonpost.com/social/May_Lafranchi">May Lafranchi</a>:<br />