"It's extremely important," Jonker said of having people at a service.
"It's part of the whole make up of what we do. We have to be sensible about everything."
He said it would be a case of the first 50 people in the building - including staff - who would get to attend the service.
Everyone there must wear a mask and sign in at the door. There would also be no gathering around outside after the service, Jonker said.
''We livestream our service as well and people know that," Jonker said.
The church also held a conference call service at the same time so elderly members were able to dial in and listen to the service.
"We're going to urge anyone who's not well ... just to stay at home or to livestream or conference in," Jonker said.
As of Tuesday the Catholic Parish of Whanganui was not yet sure whether it would be able to have Mass this week at its churches around town.
Father Vaughan Leslie said discussions regarding the size and ability to be able to hold Mass were ongoing and as soon as there was an update it would be on the Parish website.
The Parish has held daily mass on a livestream online during alert level 3 and 4.
Islamic Association of Whanganui vice president Mukarram Mairaj said prayers at the mosque in Whanganui East would continue with social distancing this week.
Worshippers would also wear masks and sign in.
He said the most they usually had at the mosque was 20 to 30 people on a Friday so he did not expect to have problems accommodating them all in a socially distanced setting.
"We can do the prayers at home, but it's better to go to the mosque because the rewards are more," Mairaj said.
St Peter's Anglican Church in Gonville was too big to have people gather for a service so will continue meeting online.
"We've been Zooming together and just having some fun online," priest Anashuya Fletcher said.
"They will continue to do it but we will be able to allow people to gather in small groups at home."
She said there were a lot of members at the church who were not able to access the Zoom meetings so for them to be able to gather at a fellow churchgoer's house was important.
"This move will be awesome because they'll be able to be included," Fletcher said.
Leaders at the Seventh Day Adventist church met on Tuesday morning and decided it wasn't going to be possible to hold in-person services under alert level 2.
Elder Julie Sergent said it was too complicated to try to get 50 people in and comply with all of the restrictions - such as social distancing.
Instead they would wait "a week or so," when she hoped the country would move to alert level 1.
"If we had to be more than 2 metres apart we wouldn't be able to fit 50 people in there," she said.
She said due to the number of elderly members at the church it was also safer to wait for lower alert levels.
Members were missing the in-person services but they were able to watch Christian TV channels or use the internet for live services.
"People are kind of more prepared this time," she said.
"They know what is to be expected."
