Heatwave may reach Finland in a week

Finland could see temperatures of 25–30°C as a heatwave from Central Europe shifts north, Yle meteorologist Matti Huutonen said on Saturday.

Huutonen expects the warm spell to arrive around the turn of July, with the first half of the month likely warmer than average. Southern and central Finland may see the highest temperatures, while the north will remain slightly cooler.

A thunderstorm front crossed Sweden’s west coast on Saturday and moved over Finland overnight, bringing rain and possible thunder. By Sunday morning, the front had passed into Russia, while a separate rain band moved across northern Finland.

Next week will bring mixed conditions, with sunshine but also a chance of showers. Temperatures in southern Finland will hover around 20°C or slightly above, while the north stays above 15°C—close to seasonal norms.

Central Europe has endured extreme heat, with Paris hitting over 40°C on Saturday, some 10–20°C above average for this time of year. Huutonen noted that high pressure building south of Finland could draw some of that warm air northward.

Water temperatures in lakes are slightly above average, ranging from 16°C in central regions to 18–20°C in the south. Winds may limit further warming next week. Algae blooms have been observed more frequently than usual, though no severe outbreaks have been reported.

Low water levels in eastern and lake-heavy central Finland have raised concerns, as groundwater remains low following a dry autumn, winter, and spring. Recent rains have eased the situation, but smaller water systems and wells may still face shortages, according to the Finnish Environment Institute.