Hard line on boats paying off: Morrison

No people-smuggling venture had succeeded in landing asylum seekers on Australia for more than four months, the government says.

In the latest update on Operation Sovereign Borders, Immigration Minister Scott Morrison said on Saturday that vigorous border protection activities was deterring illegal boat arrivals, even into the post-monsoon period when weather conditions usually improve.

Mr Morrison said the practice of turning back unauthorised boats remained in effect.

"Anyone seeking to enter Australia illegally by boat will be faced with the same policies those who previously attempted illegal entry met," he said in a statement.

Mr Morrison said no one had reached Australia since December 19 and that continued this month. But 3351 on 47 boats arrived in April 2013 under the former Labor government.

The latest Operation Sovereign Borders operational update says there are now 1281 in the processing centre on Manus Island and 1177 on Nauru, making a total of 2458.

Another 1405 remain on Christmas Island. During the last week, eight asylum seekers were transferred to Nauru.

Seven unauthorised maritime arrival transferees were voluntarily returned to Iran.

Since Operation Sovereign Borders started on September 18, 220 asylum seekers have voluntarily returned to their home countries.