Thousands are expected to turn out for the last opportunity to walk the floor of the future harbour at Shell Cove.
The community can also view the latest images of the Shell Cove project, and get an update on the progress of the various projects under way in the community.
The latter will take place at an information evening at the Shell Cove Sales and Information Centre on December 11 at 6.30pm.
The night will include an announcement from Shellharbour Mayor Marianne Saliba on the new hotel owner/operators and the vision for the Waterfront Hotel, Shell Cove.
The hotel has concept plan approval to be up to 11 storeys tall, and can be a mix of traditionally managed hotel rooms and serviced apartments.
It is separate to a "tavern" also at The Waterfront development which will be run by pub operator Balmoral Hospitality, and will include a bar and bistro with a kids' area, space for large group bookings, a wood-fired oven and central bar.
Then, on December 14, members of the community will have their last ever opportunity to walk the floor of the future harbour.
About 10,000 people took part in the 2017 walk.
"The harbour will progressively fill with water next year with the official opening planned for 2021, so we'd encourage everyone to make the most of this last opportunity to walk the harbour floor," Cr Saliba said.
"The first time we did this in October 2017, we estimated that 10,000 people came along to walk the bottom of the harbour."
The Waterfront, Shell Cove is a joint venture development between Shellharbour City Council and Frasers Property Australia.
Simone Dyer, development Director - Shell Cove, Frasers Property Australia said both community events are significant.
"The timeline to the opening of the marina in mid-2021 is particularly busy and this is a chance for everyone in the community to find out what's happening," Ms Dyer said.
"The Bottom of the Harbour walk on December 14 will be fun for the whole family, with live entertainment and a Rotary barbecue.
"On the day you can write a message for a time capsule that will be placed on the harbour floor."
The walk requires a moderate level of fitness and the ability to move up and down scaffolding stairs.
Pets cannot enter the marina and to walk on the day people must wear enclosed shoes.
The walk is on from 9am to 12pm.