Gas prices in Portsmouth & Rochester, NH

Daily metro average from AAA (2026-10-26), per gallon including taxes, for AAA’s Portsmouth-Rochester (NH only) metro area in New Hampshire.

Regular

$4.18

per gallon · €0.99/L

Midgrade

$4.77

per gallon · €1.13/L

Premium

$5.25

per gallon · €1.24/L

Diesel

$6.36

per gallon · €1.50/L

1.2% vs last week ($4.23) 44.5% vs a year ago ($2.89)

Nearest New Hampshire metros on price

The metros immediately either side of Portsmouth in New Hampshire, so you can see whether paying $4.18 here is normal or not.

Metro	Regular	vs Portsmouth
Portsmouth & Rochester, NH	$4.18	—
Manchester, NH	$4.19	+$0.01

All 2 New Hampshire metros ranked →

All New Hampshire gas prices →

State average, trend, station map and calculators.

Gas prices near me →

Your own area's price and a live map of the stations around you.

Tools for drivers in Portsmouth

Gas cost calculator →

What a trip or a full tank costs at Portsmouth prices.

Road trip gas calculator →

Any two places, priced state by state along the route.

MPG calculator →

Your car's real miles per gallon from one fill-up.

Free VIN check →

Decode a VIN: specs, recalls and fuel cost.

Frequently asked questions

How much is gas in Portsmouth right now?

Regular gasoline averages $4.18 per gallon across Portsmouth & Rochester, NH today (AAA metro average, 2026-10-26). Midgrade is $4.77, premium $5.25 and diesel $6.36.

Is gas cheaper in Portsmouth than the rest of New Hampshire?

A New Hampshire state comparison is unavailable today.

Where does Portsmouth rank in New Hampshire?

Portsmouth is the 1st cheapest of 2 New Hampshire metros AAA tracks.

Are gas prices in Portsmouth higher than a year ago?

Yes — regular is 44.5% higher than this time last year ($2.89/gal then, $4.18 now).