The Samoa meteorology service says the impact of tropical cyclone Amos was not as powerful as earlier feared.
It says the tropical cyclone warning category two for Samoa in now cancelled.
But a tropical cyclone warning category one remains in effect for the eastern side of Upolu.
At 4am local time, tropical Cyclone Amos Category three was about 95 kilometres east of Faleolo, or 72 kilometres east of Apia.
Tropical cyclone Amos is moving east-southeast at 30 kilometres an hour and is weakening slowly.
Forecasters predict sustained winds of 148 kilometres an hour close to the centre, easing to 130 kilometres an hour in the next 12 hours.
Samoa Meteorological Service Mulipola Ausetalia Titimaea said instead of a south-east path, Amos more or less continued on an easterly path and fortunately the wind strength was not as severe.
He said overnight there was a lot of flooding across the country.
"Most of the impact is mainly from the high surf due to swells and also the rainfall."
Mulipola said the Disaster Management Office would be out today to assess the damage caused by Amos.
A heavy rain warning remains in effect for Samoa.
A flood advisory remains in effect for low-lying coastal areas due to high surf.
Flooding across Samoa.
The Disaster Management office in Samoa says roads have been flooded and in some cases washed away.
The heavy rains and strong winds have also brought down trees and powerlines across the islands with power outages in some areas.
The Disaster Management office says the Land Transport Authority are currently working on establishing a temporary access road for Lano in Savai'i.
There's also been flooding around the main urban areas in the capital, Apia.
Water supply problems
The Samoa Water Authority has advised people that water service areas could experience water supply outages over the next 24-48 hours.
It says urban service areas that are being supplied from Malololelei and Alaoa systems, such Malololelei to Avele, Vailele Uta, Toomatagi, Vaivase, Fagalii, Moataa, Vaiala and parts of Malifa could be affected.
In rural service areas, the whole of Aleipata, whole of Lefaga, Tuana'i to Siufaga Falelatai will be affected by borehole water supplies due to power outages.
In Savaii service areas, the whole of Savai'i, except for villages supplied by Palauli Water Treatment Plant, will face borehole water supply issues due to power outages.
The Samoa Water Authority says the public is advised and encouraged to harvest rainwater and to use pipe water conservatively during this time.
Faleolo International Airport
Air New Zealand said Faleolo airport remains open and fully operational and its flights are currently scheduled to operate as normal however it will continue to monitor the weather.
It said people should allow plenty of time to get to the airport for check-in as road conditions may still be poor.
Yesterday Virgin Australia cancelled all flights to and from Samoa because of Amos.
The airline said its flights to Brisbane, Sydney and Auckland today have all been cancelled.
The airline said passengers are able to change their bookings free of charge.
American Samoa remains under a hurricane warning.
The United States National Weather Service in Pago Pago said the eye of storm has passed the territory.
But forecaster, Mase Akapo, said the territory was still under a hurricane warning.
"The system is now moving towards Manu'a and they expect the winds to pick up there through out today, and then they will see where the system will move from there."
"But he says for now, the hurricane warning remains in place for all of Tutuila, and they are expecting winds of between 112 to 128 kilometres an hour with higher gusts throughout this morning, and possibly even early this afternoon but he should winds should drop later this evening," he said.
Our correspondent, Monica Miller, said the winds were really strong overnight but dropped earlier this morning.
She said officials have advised people to be careful and remain indoors.