Talking to reporters after a cabinet meeting here today, Chief Minister Oommen Chandy said the ban would be from June 15 to July 21.
Fishermen rendered jobless during the period would be given free ration. They would also get financial assistance under the Fish Workers Welfare Scheme, officials said.
Trawlers from other states would be asked not to enter the state coast during the ban period.
The 25-year old practice of banning trawling in the state is in view of the gestation period of different species of fishes during monsoon.