The Culture Studio will run from 2.05pm to 4pm on Monday to Friday and be half-speech and half-music.
Last February, The Janice Forsyth Show was pulled from the airways after 18 years amid a scheduling shake-up.
Listeners objected to the move but the station said it was working on a new show for the presenter.
Ms Forsyth, who writes a weekly blog for HeraldScotland, Just Janice, said she wanted the new show to chart the heartbeat of Scotland's culture.
That programme, starting next month, represents an overall increase in the amount of arts and music programming on the station during the week.
Ms Forsyth said: "I'm looking forward to combining good music with informed and lively coverage of the arts.
"I want the programme to monitor the cultural heartbeat of Scotland – the events, the work that's being made and the debates that are going on at a really interesting point in our history.
"Broadcasting every day and not being limited to separate strands, such as books, music and comedy, will give us the freedom to respond to events and be more topical. Scotland's arts practitioners are world-class and very articulate – I hope to be able to bring them and their work to our audiences."
Tom Morton's show will move to accommodate the change, with his new music show to be broadcast on Fridays, Saturdays and Sundays from 10.05pm to 1.00am.
Morton Through Midnight aims to "bring the listener a varied selection from Scotland's rich musical history, as well as that of the rest of the world," the BBC said.
Mr Morton added: "It gives me an opportunity to play a lot of music I've loved for years but which just wouldn't have fitted in the afternoons."
The change is part of other moves in BBC Radio Scotland's schedule. The Book, Culture, Movie and Comedy Cafés will end, John Beattie's show will extend from 12.05pm to 1.30pm, and The Kitchen Café will now broadcast on a Friday in an extended feature slot from 1.05pm to 2.00pm.
Jeff Zycinski, head of radio for BBC Scotland, said: "We continue to evolve the schedule based on what listeners tell us they want from their national radio station."
Read Janice Forsyth's blogs here