Tasmania Diesel Jumps 17 Cents Overnight While the Northern Territory Pays 249 Cents a Litre

Looking at the data from the past 24 hours, a notable development has emerged from two of Australia's smaller fuel markets. Tasmania recorded the single largest overnight diesel increase of any state, with prices climbing 17.4 cents to an average of 221.3 cents per litre. Meanwhile, the Northern Territory continues to hold the unenviable position of Australia's most expensive jurisdiction at a substantial 249.0 cents per litre.

These are numbers that deserve closer analysis, particularly for the motorists and commercial operators who depend on diesel in these regions.

Tasmania's Sudden Correction

As of 9th March 2026, Tasmania diesel has jumped from 203.9 cents to 221.3 cents per litre across 237 stations. That 8.5 percent increase represents the sharpest single day movement of any Australian state in today's data.

The spread within Tasmania tells its own story. The cheapest diesel on the island sits at 184.9 cents, while the most expensive reaches 300.0 cents, creating a 115 cent gap between the best and worst prices. For Tasmanian motorists filling a 60 litre tank, the difference between shopping around and paying the average price could mean savings of more than $20.

It is worth noting that Tasmania's new average of 221.3 cents puts it almost exactly in line with New South Wales at 221.4 cents, suggesting the island state has corrected upward to match mainland pricing after a period of sitting notably lower.

The Northern Territory Premium

The numbers from the Northern Territory continue to illustrate why remote fuel pricing remains one of Australia's most persistent consumer challenges. At 249.0 cents per litre across 174 stations, NT diesel costs 37.5 cents more than the national cheapest state average in Victoria.

But the averages mask some interesting variation. Data indicates that Katherine is offering diesel as low as 185.9 cents per litre, with an average across four stations of 199.7 cents. Neighbouring Katherine South shows similar patterns, with prices starting at 188.0 cents across three stations. Even Mataranka, further into the outback, averages 200.3 cents with a low of 194.0 cents.

These regional NT towns are delivering diesel at prices substantially below the territory average, and in some cases below several capital city averages. The takeaway for NT motorists is clear: location matters enormously, and checking prices before filling up can save 50 cents or more per litre compared to the territory's worst stations at 399.0 cents.

How Every State Compares Right Now

A closer analysis of today's national diesel landscape reveals a clear hierarchy:

The gap between Victoria's 211.5 cents and the Northern Territory's 249.0 cents is a substantial 37.5 cents per litre. On a standard 60 litre fill, that translates to $22.50.

Interestingly, Western Australia bucked the national trend by recording a 7.2 cent decrease overnight. Towns like Kalbarri in regional WA are posting diesel as low as 155.2 cents, which is a remarkable 94 cents below the worst NT prices. Busselton at 193.0 cents and Kwinana Beach at 192.7 cents are also delivering strong value for Perth metro drivers heading south.

What the Trends Show

Looking at the weekly data, Victoria's diesel average has climbed steadily from 191.4 cents on 4th March to 211.5 cents today, representing a 20 cent increase over five days. Queensland has remained stubbornly elevated, hovering between 218 and 233 cents all week.

South Australia has seen the most volatility, swinging from 214.5 cents on 6th March to 226.9 cents today, a pattern consistent with SA's relatively tight market of 153 stations where pricing adjustments ripple through quickly.

The Bottom Line

The data is clear: Australian diesel pricing varies enormously not just between states but within them. Tasmania's overnight correction, the Northern Territory's persistent premium, and Western Australia's counter trend decline all point to a market where informed motorists have a genuine advantage.

For those in Tasmania, the sharp increase warrants careful price checking over the coming days as the market settles. NT drivers should look toward Katherine and surrounding towns for the best regional value. And Western Australian motorists can take advantage of the current downward movement, particularly at regional servos posting sub 200 cent pricing.

The numbers tell an interesting story this week, and for once, it is the smaller states making the biggest moves.