At about 4pm on August 9, when walking along Mossy Point headland with friends Trina Hermansen and Patrik Bergman, she stumbled into something out of the ordinary.

Ms Thomas said the rain had eased, but wind was strong, blowing sea foam up the cliff face and onto the road.

"We saw the foam and thought, 'how is that even possible'," Ms Thomas said.

"It looked like snow, but it was foam!"

She couldn't help but release her excitement and join in the fun.

"There were all these little kids playing in the foam getting really dirty," she said.

Ms Thomas said the foam was "white and clean".

"We didn't feel like it would make you sick," she said.

"I grabbed one of the little boys and I was spinning him around in the foam - it was the best moment of the year!"

Nature Coast Marine Group president Jane Elek said the foam was a result of the "violent storm seas".

She said the turbulence of the water created the foam, "like froth on a milkshake".

"Some of the foam is caused by rotting seaweed and proteinaceous material in the water," Ms Elek said.

"Seaweed produces agar which helps produce the foam."

READ MORE: NSW school clusters grow as state records 14 new cases of COVID-19

Ms Elek said certain spots can be favourable for collection.

"It tends to collect in little eddies and blown up on to the shore," she said.

The foam was not necessarily a sign of pollution.

"Although it looks a bit brown, it can be from the broken down seaweed," Ms Elek said.

However, some of the shire's beaches may be subject to sewer overflow. The council signposts beaches when water quality is low.