Members of the public should expect rough weather in the coming days, the Samoa Meteorology Office has warned.

A heavy rain advisory remains in effect for the southern districts of Samoa as a broad cloud band south of Samoa persists with a trough of low pressure.

Heavy downpours with poor visibility and slippery roads and gusty winds at times may be experienced as long as the system hangs in the vicinity of the islands.

"The aforementioned system is expected to progress northward towards the island in the evening and bring unstable and wet weather conditions for Samoa," the MET Office severe weather warning reads.

"Therefore, the heavy rain advisory will remain for southern locations of all islands."

From Monday through to Saturday, the intense high-pressure system situated over New Zealand is expected to direct moderate to fresh south-easterly wind flow with some rainfall activity. 

The MET Office foresees that the system will start to relax within mid-week as it sinks south-eastward, allowing the western flank to induce the Northeasterly wind-flow by Wednesday into Thursday. 

But more bad weather is to be expected.

"Another intense high pressure from the southwest may again introduce strengthening trades near the end of the new week. So, windy conditions are anticipated for the beginning of the new week and the weekend ahead," the MET Office warning continues.

"Developing high swells and waves activity are expected to reach our shores by Monday evening when an intense high-pressure system positioned over New Zealand generates moderate to fresh south-easterly wind-flow."

Thus, an advisory for small crafts is most likely to be enforced by Monday morning.