PEOPLE living in low-lying areas in Lau, Taveuni, Lomaiviti and Vanua Levu have been warned of flash floods.
Acting director of meteorology Aminiasi Tuidraki said these areas were expected to experience heavy rainfall because of a trough of low pressure lying in the north of the country.
People living in other parts of the country have also been advised to brace themselves for the cold nights ahead. The recent change in weather the drop in temperature and strong winds is expected to continue in the country until Thursday.
"By Tuesday afternoon (today), the weather should start clearing and by Thursday we should expect very good weather in these parts of Fiji," Mr Tuidraki said.
"A trough of high pressure is expected to move in to Fiji by Thursday, bringing in cold weather."
Mr Tuidraki said cold nights and strong winds had been experienced in parts of the country for the past few days.
"Nadi recorded 20 degrees on Sunday night and these kind of temperatures will continue to be experienced around Fiji with this trough of high pressure moving in.
"We should be expecting cool nights of temperatures ranging up from 19-20 degrees and cool days of 27-28 degrees," he said.