"There's been quite a bit of smelt activity on all these lakes, Tarawera perhaps in particular, so that techniques ranging from shallow harling to the use of downriggers can turn up some catches."
Mr Osborne says fishing early in the morning or late in the evening are the best times to target the trout that are chasing smelt.
Boaties need to actively search out the trout on their fish finders and then use the method that's most appropriate.
"We have recently received good fishing reports from Rerewhakaaitu and Rotoma, two lakes that remain open all winter, and we suggest harling on still mornings with smelt flies around drop-offs and weed beds.
"Spin fishing from the shore can also be productive at this time of year as many of the bigger fish look to spawn in the shallows."
Mr Osborne adds that the stream mouths on Lake Rotorua are also a good place to try, especially the Ngongotaha and Waiteti mouths which will continue to attract fresh runs of trout after rain.
Fish & Game says that for more up to the minute information on waters still open and plentiful shoreline opportunities, anglers can contact the office on: 07 357 5501.
Background:
What rules apply to the different lakes, streams and rivers?
Lakes Rotoiti, Tarawera and Okataina will close to all boat fishing after June 30, but remain open to fishing from the designated winter shoreline areas.
The Ohau Channel and upper section of the Ngongotaha above SH5, plus the Utuhina stream above Devon Street will all close to fishing from the end of June.
To check the regulations for other areas: http://eastern.fishandgame.org.nz/eastern-fishing-regulations