It is in Sweden yes, but that is why you have magazines (lakes). And those are emptied during winter when the snow does not melt and the general consumption is higher. And at the end of it all you need to spend it before spring because then they star filling up again.

(Edit) Right now in Sweden the magazines are filled to 70% (or slightly lower). In april they were at 30%

https://www.energiforetagen.se/globalassets/energiforetagen/...

At the bottom there you can see how the water accumulates during different months. Area 3&4 is the southern half of Sweden, area 1 and 2 are the northen parts.