Brit holidaymakers warned about scorching 40C weather in Spain and Portugal

UK tourists heading to Spain or Portugal in the coming days have been warned of intense weather conditions as temperatures soar.

The mercury could top 40C in some Spanish towns, with no sign of the heatwave settling in the next few days, reports the Irish Mirror.

While much of Britain is set to experience sunny spells throughout this week, those jetting off to the continent face warnings over extreme heat.

The most intense conditions are expected in Costa del Sol, as well as the Balearic and Canary Islands, up until the end of next week.

In Andalusia, which has already seen its first serious forest fire of the summer, an orange weather warning has been issued with highs of 44C forecasted.

Tourists from London stroll along Playa d'en Bossa beach in Ibiza, Spain (Getty Images)

Many other parts of the country are on Yellow alert.

Those heading to southern parts of Spain are have been urged to take preventative measures to protect themselves from the heat, such as staying indoors, ensuring they stay hydrated and wearing SPF 50 suncream.

Spain's Met Office Aemet stated: "The heat will be very intense on the mainland and in the Balearics at least until next Wednesday and it is not ruled out that it could extend for a couple of days.

Temperatures could rocket past 40C in some Spanish towns (AFP via Getty Images)

"The intense heatwave is very rare for the month of June."

Temperatures in certain areas of the country are going to hit up to 10 or 15C higher than usual during the day and between 5 and 10C higher at night, Hull Live reported.

Holidaymakers are advised to exercise extreme caution and avoid exposure to the sun in peak hours of the day, according to Aement.

People have been warned to take measures to protect themselves from the sun (AFP via Getty Images)

Aemet added: "As of Thursday, we will exceed 35C in large areas of the Peninsula; more than 30C to 32C in the Balearic Islands and the south of the Canary Islands." It also warned of "tropical nights" with temperatures not dropping below 20C in some areas.

But these figures are predicted to be dwarfed by the heat surge from the weekend onwards.

Meanwhile in Portugal, summer weather is expected to last well into autumn, up to October.

Sun worshippers flock to the beach in Barcelona at the end of last month (Anadolu Agency via Getty Images)

Ricardo Deus, from the Division of Meteorological Forecasting and Surveillance and the Division of Climate and Climate Change at IPMA told The Portugal News: “There are several scenarios, but the most likely is that the month of June will be considered normal to hot.”

It comes as last month was the hottest May on record in the country since 1931, according to a monthly report from IPMA.