Cyclone Uesi will likely impact the Macquarie Coast bringing hazardous surf conditions, including three to four metre swells over the next few days.
Showers and possible thunderstorms are also likely to continue with possible localised falls of up to 40mm.
Meteorologist with weatherzone Graeme Brittain said the shower and storm activity was the main focus on the weather.
"There is a high chance of showers and at least a moderate chance of thunderstorms most likely this afternoon (Thursday)," he said.
"Modelling suggests rainfall of around 10 to 20mm but up to 40mm in some localised heavier falls.
"These heavier falls are more likely to be north of Port Macquarie - Coffs Harbour - but you will still have the effects of (Cyclone) Uesi .
"Showers are likely to continue on Friday but mainly in the morning while there is a less chance of thunderstorms in the afternoon."
Mr Brittain said showers will be increasingly likely on Saturday with possible storms but these will be mainly confined to inland areas, including Mt Seaview.
The swell brought on by the cyclone will be "quite significant" over the next 12 hours, peaking by late afternoon or early evening on Friday.
"We are looking at 3 to 4 metre swell," he said.
"The Bureau of Meteorology has issued a hazardous surf warning for the Macquarie Coast.
"The swell is expected to remain high - 2 to 3 metres - into Saturday but it will be a decreasing trend through Saturday as the system (Cyclone Uesi) moves further from mainland Australia."
The SES is urging residents to take steps now to avoid call outs to overflowing drains and downpipes or blocked drains.Michael Ward
Maximum temperatures - Friday 27 degrees, Saturday 30 degrees, Sunday 28 degrees.
Minimum temperatures - Friday 21 degrees, Saturday 18 degrees, Sunday 21 degrees.
The heavy rain this week saws the SES Port Macquarie unit called to 15 jobs on Wednesday night.
The jobs were the result of "short, sharp weather events with some flash flooding", said unit commander Michael Ward.
"The heavy but sharp rainfall saw a number of streets closed to traffic on Wednesday night," he said.
"These included, Flynns Street, Belah Road and Lake Road between Central Road and Ocean Drive - there were other roads closed as well.
"The SES is urging residents to take steps now to avoid call outs to overflowing drains and downpipes or blocked drains.
"Residents should be proactive now to avoid a call out as these weather events arrive.
"We are urging residents to have a look at their property and take the necessary steps because it will help offset the potential of further issues."
The unit is also monitoring the path of Cyclone Uesi and "its possible impacts on the coastline".
Mr Ward said renters could take action by contacting their landlord or real estate agent if maintenance was required.
The NSW Police Force has advised:
- People should consider staying out of the water and avoid walking near surf-exposed areas.
- Rock fishers should avoid coastal rock platforms exposed to the ocean and seek a safe location that is sheltered from the surf.
- Boaters planning to cross shallow water and ocean bars should consider changing or delaying their voyage.
- Boaters already on the water should carry the appropriate safety equipment and wear a life jacket.
- Boaters should remember to log on with their local Marine Rescue radio base, via VHF Radio or the Marine Rescue APP, and consider their safety management plan.
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