Fish and Game rangers were out checking licenses and talking with anglers for the morning.
Most were successful with one local landing seven nice rainbows in the first two hours of fishing.
Brown trout were less common on the day, however, their upstream migration was very much triggered by warming lake temperatures which would happen within the next couple of weeks.
"The surface temperature on Lake Rotorua was currently 18C and brown trout would move upstream from the lake once it hit 19C. The browns we have seen this season are looking really good, averaging almost 3kg," Osborne said.
Anglers must carry fishing licenses with them, and check their fishing equipment as they move between waterways.
This was important to prevent the spread of invasive pest species such as weeds and alien fish species like catfish.