On a cold, winter's morning at the Sydney markets this week, trays of golden Kensington Pride mangoes arrived from the sunny Northern Territory.

They are officially the first mangoes of the 2018/19 season.

Wholesaler Moustapha Obeid said the very early fruit from Darwin's rural area was of excellent quality.

"These are the first of the season and they've got a very nice colour, nice blush … and very sweet, beautiful," he told ABC Rural.

Mr Obeid said the trays were selling for $60-85 each, with a lot of buyers still not use to seeing mangoes in July.

"It's still a bit cold down in Sydney for mangoes, they're not going to be as popular as when it's hot," he said.

"But everyone's buying bits and pieces which is good."

NT growers learning the secrets to early fruit

President of the NT Mango Industry Association, Leo Skliros, said there were a number of Top End farms ready to supply some early mangoes, but not as many as last year.

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"There's quite a few farmers in the NT who have now developed techniques, using a variety of treatments, to bring fruit on early," he said.

"Some years though the weather doesn't permit as much early fruit, and this is one of those years.

"TMP Mangoes, the grower which has fruit down in Sydney [this week] has done quite well and has a fair bit [of fruit]."

Kensington Pride mangoes from Darwin in the Sydney markets this week. ( Supplied )

But what about the rest of the season?

The Northern Territory produced 48 per cent of last season's national mango crop which for the first time went beyond 10 million trays.

Mr Skliros said it was tough to tell what this season will produce.

"The majority of the NT fruit will be picked at the end of September and into October, so it's a bit early to tell, but the signs aren't as positive as they were a month ago," he said.

"There's been reports of fruit-set varying from very good to extremely bad, so we'll have to wait and see."

The harvest of mangoes from the 2017/18 season only wrapped up recently in areas such as Gin Gin in Western Australia.

As more mangoes are planted in southern growing areas of Australia the season is constantly being stretched, which Mr Skliros believed was a good thing.

"I think if we get to the point where there's mangoes on the shelves like apples it'd be a great thing," he said.

"I think Australia is getting to a stage where we can probably have mangoes on the shelves eight months of the year, which is great, and I really can't see the need for imported mangoes to come in."