Australia's exporters have posted a second consecutive solid monthly trade surplus.

The surplus has come in at $825 million in February, down from a $950 million surplus in January.

“The trade account is on track to be a small net contributor to growth this quarter after December quarter's 0.5 per cent point detraction from real GDP,” NAB economist David de Garis said.

“Notwithstanding the pullback in iron ore prices over recent weeks, export commodity prices for the quarter past indicate a solid rise in the terms of trade, also assisting income growth.”

A lot of the good news is linked to commodity exports, particularly rising LNG and coal prices.

Iron ore and other minerals (+2.6 per cent) and coal (1.1 per cent) added close to $300 million to the export side of the ledger.

LNG slipped because it delivered lower volumes despite higher prices, though exports are up 40 per cent over the year.

A record $29 billion worth of LNG has been shipped out in the last 12 months – six times more than a decade ago.

Tourism and service exports rose too, while manufacturers saw an 11 per cent dip.