Regional water situation

Southern and Southwest Finland 21.4.

The water levels in the rivers of the southern and southwest coasts have continued to decline, as the weather has remained dry. During the first half of the year, precipitation levels at some observation stations have been only 50-60 mm, which is clearly less than half of the normal levels. Flow rates are lower than average, as the flow rates reached their low spring flood peaks about a month earlier than average and have been declining since. However, during the weekend, any rainfall may cause river water levels to rise.

The water levels in the lakes of Southern and Southwest Finland are partly lower than usual. Of the regulated lakes, Lakes Lohjanjärvi and Hiidenvesi have risen to spring levels well, with the help of the new regulation permit introduced in 2024. The water situation in Lake Pyhäjärvi, in Säkylä, is also good. Since the beginning of the year, the flow regulation has been kept low, due to the low amount of snow, and the water level of the lake has thus remained above average. The water level of the natural lake Pyhäjärvi, in Artjärvi, is declining from its peak, which was a month earlier than usual. Typically, the lake is at its highest level at the turn of April and May.