If it feels as though summer has come early, that’s because we’re already enjoying August temperatures. This week’s remarkable spell of sunshine in southern England is to continue – and warm up. The temperature in the South is forecast to reach 24C (75F) today and 25C (77F) tomorrow, surpassing the highest seen so far this year, the 21.9C (71.4F) recorded in London on Friday. The delightful weather, caused by warm air blowing up from the Azores, is creating conditions we might usually experience in July or August. Scroll down for video . Beach life: People enjoy the weather at Barry Island  in south Wales yesterday, as most of England and Wales enjoys  warm spring conditions . Sunseekers: People sit on the beach at Barry Island in Wales, as forecasters predicted temperatures could reach 24C by tomorrow . Anyone for cricket? The action in front of Worcester Cathedral during day two of a match between Worcestershire and Yorkshire yesterday . Unusual sight: A man appears to walk across a rainbow at the beach at Barry Island, near Cardiff in south Wales yesterday . Stunning: A fog bank rolling onto Portsmouth from the Solent, after cool air moved quickly over the surface of the warm water . Britons are so confident of a scorching summer that bookmakers are receiving tens of thousands of pounds in bets on this year breaking records. The record for the hottest day ever in Britain was set more than a decade ago in August 2003 when temperatures hit 38.1C (101F) in Gravesend, Kent. Coral’s price on this summer being the hottest on record has fallen from 10/1 to 2/1, while Ladbrokes has 5/6 on this spring being the warmest ever. There has been a surge in bets after the recent warm weather, and William Hill has 8/1 odds that the temperature will exceed 100F (37.8C) this year. Ladbrokes is also offering 8/1 that the April record of 29.4C (84.9F) set in 1949 in Camden, north London, will be broken by the end of the month. The forecast for today is actually warmer than the 18C (64F) average daytime temperature in August, and way ahead of the 11C (52F) normally expected in April. This weekend will be slightly cooler than the dizzy heights expected tomorrow, but the clear skies and above-average temperatures are forecast to last well into next week. Met Office spokesman Laura Young said last night: ‘We are expecting some really good temperatures over the next few days. Unless you are in north-west Scotland, which will see quite a lot of rain, it will be dry and sunny. ‘On Tuesday we could see 23C to 25C (73F to 77F) in prolonged sunshine. That is double the daytime average for this time of year. ‘Wednesday will be 22C to 25C (72F to 77F) or higher in places. Thursday will probably be slightly cooler but still in the high teens. Wednesday warmth: Most of England and Wales will enjoy sunshine over the next few days with temperatures hitting 24C later this week . Peak District awakening: The morning mist looking out across the Derbyshire village of Foolow, near Grindleford, which woke to a frost . Going for a walk: A deer in the morning mist near Foolow in Derbyshire yesterday, as Britons prepared for the warmest weather of the year so far . ‘There is a cold air mass arriving on Thursday night but it is expected to stay dry well into next week. After that we can be less certain.’ The spell of warm weather, which has now lasted more than a week, has seen people flocking to the nation’s beaches. Among them were swimmers in the South-West who were stunned to see giant jellyfish in the waters. Barrel jellyfish, which have tentacles up to six feet long, were spotted near Hope Cove in south Devon. The species are usually found in the sunnier climes of the Mediterranean, but the rising temperatures and warmer seas have meant that more plankton becomes available and the jellyfish have headed closer to shore. The species is harmless to humans, but with the weather warming up then other jellyfish could be heading our way. Beachgoers are advised not to touch jellyfish in case they have chanced upon a species with a powerful sting. Devon vet Rupert Kirkwood, whose son Henry had an encounter with one of the jellyfish while kayaking, said: ‘No doubt they are encouraged to put in an appearance by the sunny weather. I have never seen them so early in the year. Could be the start of a bumper jellyfish year.’ After the bad smog seen late last week in the South-East, the air will be relatively clear for most parts over the next few days. Poor visibility: A fog-shrouded Brighton seafront yesterday, in stark contrast to yesterday's sunshine, as more warm temperatures are on the way . Apocalypse wow! It could be a poster for the 1979 Vietnam War film, but this stunning sunrise, behind dredger Britannia Beaver, painted the skies in Gravesend, Kent . Spectacular start: The sun rises over fishing boats off the North East coast near Cullercoats bay in North Tyneside yesterday morning . Over the water: Sunrise near Cullercoats bay in North Tyneside, as Britain basked in the hottest temperatures of the year so far . But pollution levels will increase again on Thursday and Friday, particularly in the South-West, where Cornwall and Devon are expected to see fumes rise to dangerous levels. The Met Office three-month contingency forecast for public officials predicts that there is an average chance of a warmer than usual summer. But thankfully the chances of it being much colder than usual is just 10 per cent. A spokesman said: ‘Unfortunately, the weather we get in April doesn’t necessarily tell us anything about the kind of summer we can expect. ‘We’re still in the midst of spring, so it’s far too early to say what the months of June, July and August may hold.’ Ladbrokes spokesman David Williams said yesterday: ‘The money flooding in on weather bets is unusual and has taken us a bit by surprise. ‘This is the first time we have seen quite significant sums wagered on this specific bet - so obviously people out there sense something hot is coming.’ And Nicola McGeady from Coral added: 'The British public are obsessed with the weather and that is reflected in the interest in weather betting.' Hot day: These graphics show the cloud coverage and temperatures tomorrow, with the South East expected to have the best weather . Arriving: The predicted hot weather this week is the result of a plume of warm air heading towards the UK from the south west . Green for cold, red for hot: These graphics from Netweather show the forecast temperatures for tomorrow (left) and Wednesday (right) A third of weather bets to Ladbrokes have come from punters in the South East - the area that has enjoyed the best conditions over the past week. And the bookmaker said its biggest bet of the year so far has been £1,000 on 2015 to be the hottest year on record at 8/1 - placed in January. Meanwhile, Coral - MailOnline's official betting partner - said it has even had a request from someone asking to bet on rain every day this summer. The Met Office has confirmed that hotter-than-average temperatures are more than twice as likely than below-average conditions until June. It said in a long-range forecast that ‘much of the tropical Pacific Ocean remains warmer than average and close to El Nino thresholds’. El Nino - the warming of Pacific sea surface temperatures - can trigger drought in south-east Asia and Australia as well as floods in South America. The Met Office says most climate models ‘now suggest that sea surface temperatures will exceed El Nino thresholds in late spring or early summer’. With Britain set to bask in its hottest temperatures of the year so far this week, thousands of parents and children are expected to head to the beach. But firefighters have warned those thinking about stripping off and diving into the water - with more than 650 water-related deaths in the UK in 2013. The act, known as ‘tombstoning’, can lead to people suffering ‘cold water shock’ when the air temperature is much higher than that of the water. London Fire Brigade assistant commissioner Peter Cowup said: ‘Rivers, lakes and canals may look inviting, especially on a hot day and after a drink. ‘But it’s important to realise that open water has hidden dangers that can hurt you and at worse, kill you.’ On the first-ever Drowning Prevention and Water Safety Week, firefighters added that the 16-30 age group was worst-hit by water deaths in 2013. Giant jellyfish are being spotted off Britain earlier than normal thanks to the warm weather, it was claimed yesterday. Kayaker Rupert Kirkwood, a seasoned sea watcher, was stunned to see the giant creatures off Hope Cove in Devon. The barrel jellyfish, which have tentacles up to 6ft long, were pictured floating next to Mr Kirkwood’s kayak in the sun-drenched blue waters. Up close: Rupert Kirkwood's son Henry had this encounter with a barrel jellyfish near Hope Cove off the coast of south Devon . The species are usually found in more tropical areas such as the Mediterranean Sea. But the rising temperatures and warmer seas have meant more plankton is available - and the jellyfish have headed closer to shore. The dustbin lid-shaped species is harmless to humans but with the weather warming up experts say more could be heading our way. Beachgoers are advised not to touch jellyfish in case they have chanced upon a species with a powerful sting. Floating: The dustbin lid-shaped species is harmless to humans but with the weather warming up experts say more could be heading our way . The Red Cross says that anyone who does get stung should not try to use urine to provide relief as the healing properties of this are an urban myth. Vinegar is said to be far more effective. Vet Mr Kirkwood said: ‘No doubt they [are] encouraged to put in an appearance by the sunny weather. ‘I have never seen them so early in the year. Could be the start of a bumper jellyfish year.’
Tomorrow will be week's warmest day and Met Office says above-average temperatures are forecast until June .
Weather, caused by warm air from the Azores, creating conditions we might usually experience in July or August .
Bookmakers are receiving tens of thousands of pounds in bets on weather records being broken this summer .
Public alerted to dangers in water as jellyfish arrive early off coast and firefighters issue 'tombstoning' warning .