The pound has dipped below $1.30 after figures revealed that retail sales dropped in June, confounding expectations of an increase.
The Office for National Statistics said sales fell by 0.5% between May and June, below forecasts of a 0.2% rise.
While the World Cup and the heatwave lifted food and drink sales, they also kept shoppers away from the High Street.
The weak data cast doubt on whether interest rates will rise next month.
Sterling slipped against the US dollar to $1.2988 immediately following the retail data release.
The Bank of England had been expected to raise the interest rate in August, however following the most recent inflation figures, economists were divided on whether it would go ahead with the move.
Tom Stevens, investment director at the fund manager Fidelity International, said: “An August rate hike is in the balance. Whether or not one is delivered, the trajectory thereafter will be extremely shallow.”
The pound quickly regained some ground to trade at $1.3008, but it remains around the 10-month low it reached on Tuesday following lower than expected inflation for June.
The last time sterling fell below $1.30 was on 4 September last year.
The figures from the Office for National Statistics also showed that retail sales rose by 2.9% in the year to June, a slowdown from the 4.1% annual increase recorded in May and below forecasts of 3.5%.
However, Samuel Tombs, chief UK economist at Pantheon Macroeconomics said the data would not “undermine the [Bank of England] Monetary Policy Committee’s judgement that the economy rebounded in the second quarter”.
In the April-to-June quarter retail sales increased by 2.1% – the biggest quarterly rise in 14 years.
ONS senior statistician, Rhian Murphy said: “Retail sales grew strongly across the three months to June 2018 as the warm weather encouraged shoppers to buy food and drink for their BBQs.
“However, in June retail sales actually fell back slightly, with continued growth in food sales offset by declining spending in many other shops as consumers stayed away from stores and instead enjoyed the World Cup and the heatwave.”
Ruth Gregory, senior UK economist at Capital Economics, said: “Some of the second-quarter’s strength reflects temporary factors, such as a boost from the warm weather and the Royal Wedding celebrations.
“Crucially, though, the big constraint on spending – namely the squeeze on real wages from high inflation – has eased.”
Economic data out earlier this week showed that while wage growth has slowed to 2.7%, it remains above inflation.
Ms Gregory said: “While this week’s unexpectedly-weak inflation figures have made the outlook for an interest rate rise in August rather less clear-cut, the recovery in the consumer sector supports our view that a hike is still more likely than not.”
‘Good result’ for food
Between May and June, non-food sales fell by 1.1%, with demand for clothing down 0.8%.
Mr Tombs from Pantheon Macroeconomics said: “Many households [had] already brought seasonal apparel when the weather also was unusually warm in April and May.”
Food sales rose by 0.1% in June, which Mr Tombs said was “a good result” following substantial increases in April and May.
He added: “The World Cup might have helped to support food sales, by encouraging people to stay in rather than eat out, though note that England’s three knock-out games that led to huge TV audiences didn’t happen until July.”