It ought to be that fish sacrifices to to the water spirits and other sacrifices goes to the forest ones, but the results seem rather random.
The spirits will calm down over time if you don't do anything that aggravates them (such as fishing). I try to sacrifice fish when I can (which is tricky, as fish don't come in cuts, and sacrificial of a whole salmon is rather silly when that's the only thing you've caught over 3 full days of fishing). However, I try to time fish sacrifices such that I sacrifice the last piece of roasted fish rather than eating it (including saving the last bit for the next sacrifice and instead start to eat the next fish. or even go hungry).
My routine includes a daily sacrifice regardless of whether anything warranting a sacrifice has happened or not, and I try to do that in late morning so I don't forget.
The rituals that can only be done at particular times can only be performed at those times, although the fishing related ones refer to the first time after the event, which, in my interpretation at least, means it can well be in summer if you haven't caught anything in between (because you haven't lived off of fishing).