Sydney Harbour's new 'beach' in Marrinawi Cove, Barangaroo trends now

The opening of a new 'beach' in Sydney Harbour, just minutes from the city's sprawling CBD offices, was met with excitement by sticky workers sweating in the summer humidity - and I was no exception.

The ocean pool opened to the public at Marrinawi Cove, at the northern end of Barangaroo Reserve, for the first time this week.

I rushed to try the new secluded spot - conveniently located just a 12 minute walk from my own office - and quickly realised I wasn't the only one. 

When I arrived at the cove at 11.30am on Tuesday, the area was already buzzing with locals eager to take a dip while enjoying panoramic views of the Harbour Bridge. 

But while the new spot offers incredible views, there are a few aspects of the city's newest 'beach' that could do with some fine-tuning. 

The first is the slippery rocks. While moss is to be expected at a saltwater pool, getting into the water via the rocky foreshore, with no stairs or railings, can be slow-going. 

It's also tricky to gauge the depth of the pool as the water is murky, and after a paddle around the perimeter I found I couldn't touch the bottom - even in the shallows. 

While diving is prohibited due to shallow rocks, swimmers quickly found that a high platform at the 'deep end' provided a great place to jump into the water. 

A child on a boogie board was particularly delighted when the enclosure suddenly became a wave pool as a boat passed by - however, others were less than impressed when their belongings were soaked with the wash. 

Another drawback is the lack of sand - swimmers can either perch on the large slabs of rocks around the water's perimeter or nab a space on a limited grassy area.