A West Australian coastal town with a population that swells from 400 to 10,000 during the peak season says it needs more facilities and infrastructure to ensure tourism remains sustainable.

The seaside community of Bremer Bay, which lies on the edge of a national park, is inundated with visitors every summer and stakeholders say the town's facilities are "stretched".

Bremer Bay attracts the largest congregation of orcas in the southern hemisphere and is internationally renowned for whale-watching.

Community Resource and Visitors Centre manager Troy Treeby said he would welcome more investment from the state and local governments to ensure demand was met.

"A lot of tourists come in with RVs and they want to know where a dump point is and access to water, and we just don't have those facilities in town," he said.

Mr Treeby also said the town could benefit from additional bins and parking.

He said the town only had one general store and said there were times that he had gone without essential items.

"We just can't keep up," Mr Treeby said.

"It's certainly not the store's fault — they try and ramp up their orders, but it's really hard to gauge the demand and keep up with the amount of people.

"It's sort of a doubled edged sword to the fantastic opportunities tourism brings."

Mr Treeby said the internet also got "super congested" and was slow when the town filled up.

The issues are not confined to the summer months — many visitors also arrive in winter.

No place to stay

Another major issue stunting the growth of the town is its lack of accommodation for workers, according to Bremer Bay Resort owner Melissa Joy.

Ms Joy said there was not a staffing shortage like in some other parts of regional Australia, but workers had nowhere to stay.

She had been buying homes where she accommodates her employees for free.

"We currently rent or own seven houses where we put our staff — that's not enough," Ms Joy said.

Ms Joy said government-funded accommodation for workers would allow residential housing to be reserved for permanent residents.

Mr Treeby said it would be great if all three levels of government and the community united to help the town to the volume of tourists.

"We do want to be able to support tourism and see it develop and continue, but in a way that's sustainable for the town so that we can protect this precious place into the future," he said.

The Jerramungup Shire and its chief executive officer Martin Cuthbert were asked what they were doing to support Bremer Bay, but did not answer questions from the ABC.

WA Tourism Minister Roger Cook was also contacted for comment.