Otago Fish and Game ranger Paul van Klink of Wanaka says anglers have made the most of a stunning start to spring since the move to Alert Level 3.
Government rules allow shore fishing close to home but Mr van Klink says some people are fishing in places where they should not be at this time of year.
"Remember that locations like Deans Bank, on the Upper Clutha, are still off limits during the winter closed season while fish there are spawning," he said.
Deans Bank reopens on October 1 and only fly fishing is allowed in that section of the river when it is open.
Mr van Klink said it was great to see people fishing to enjoy the outdoors, but not great that some are forgetting to look up the rules.
"If you notice someone fishing in closed waters, politely encourage them to move on while keeping a safe distance."
Anglers are encouraged to check the South Island sports fishing regulation guidebook before heading out.
October 1 marks the start of the 2021-22 season.
