Winter is the fourth season in Stardew Valley. It's followed by Spring and preceded by Fall. Winter is one of the most difficult seasons, because all the grass and weeds on the farm die out. This makes fiber and hay more difficult to obtain (fiber can still be found in The Mines and Mutant Bug Lair, but hay must be purchased from Marnie's Ranch or grown from Wheat in the Greenhouse, if unlocked). However, some of the most valuable items in the game appear only in Winter.
The Nautilus Shell can be found at The Beach only in Winter. In addition, the following items can be found while foraging during Winter. The percentages provided for each location are the percentage of all foraged items in the location that will (on average) be the specified item.[1]
These fish can be caught in the submarine ride at the Night Market during Winter 15-17, while the market is open (5pm – 2am). They can also be caught regardless of weather, time, or season using Magic Bait in the southwest corner of The Beach.
↑The foraged items that can spawn in a given location/season are determined by GameLocation::spawnObjects(), using input from Locations.xnb. The percentages provided here are based on the chances specified in Locations.xnb, but have been normalized to ensure that the percentages sum to 100% for each location/season.