"Whether for the rest of the summer gas prices will continue to trend down depends on OPEC's follow-through to increase oil output and how strong our gasoline demand turns out to be," said Trilby Lundberg, who publishes the biweekly Lundberg Survey of almost 8,000 U.S. gas stations. "We always consume the most in June, July and August."

Hawai'i's statewide prices reached a record average high of $2.360 for a gallon of regular gasoline June 1, according to the AAA Daily Fuel Gauge. The average dipped slightly and then increased to $2.345 today. That's a difference of less than half a cent from June 1.

O'ahu's average price hit a record high of 2.254 May 28, according to the AAA Daily Fuel Gauge. Today, the price was almost the same at $2.250.

The national weighted average price of a gallon of regular gasoline at self-serve pumps today, including taxes, was about $1.99. The price was about $2.12 for midgrade and $2.19 for premium.

Experts disagree on how low gas prices will go. But most agree that they'll spike higher again toward the end of summer, maybe to as much as $2.25 on average nationally, then fall considerably — perhaps as low as $1.60 — in the fourth quarter, when summer driving season is over and demand drops.

The Organization of Petroleum Exporting Countries, which supplies more than a third of the world's crude oil, announced this month that it will raise its official daily production quota by more than 2 million barrels to 26 million barrels and, if necessary, by an additional 500,000 barrels on Aug. 1.

Crude oil prices, which had been hovering above $40 a barrel in recent weeks, closed last week at $38.45 a barrel.