Hang on to your sunscreen and lemonade coolers -- Long Island is in for a hot and muggy streak.

The high temperature Tuesday came in at 88 at Long Island MacArthur Airport, but felt more like the low 90s for much of the day thanks to the humidity, according to the National Weather Service.

Wednesday is expected to offer more of the same -- temperatures in the high 80s and heat indexes in the low 90s, said Kevin Kacan, a weather service meteorologist in Upton. Montauk Point and some spots on the North Fork could see highs of around 86.

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The airport is forecast to reach 89 degrees, with the record for the day of 96 set in 2002, the weather service said.

With some small variations, those conditions are likely to continue at least into early next week, he said.

At play has been a lingering high-pressure system that's forced warm air up along the coast, with a thermal ridge -- which is akin to a bubble of warmer air -- expected to arrive Thursday, he said.

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"Parts of Nassau County will have a heat wave" this week, News 12 Long Island meteorologist Rich Hoffman said Tuesday.

Defined as three consecutive days of 90 or above, the Island last saw an official heat wave at the airport in 2013 -- from July 14 to 20.

"I don't see any record highs" for the week, Hoffman said, but ahead is a stretch of "very warm to hot weather."

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An air quality alert is also in effect for Wednesday from 11 a.m. to 11 p.m. Alerts are issued when the Air Quality Index reaches 100 or higher, which means levels of air pollutants can have adverse health effects for those with respiratory issues, including asthma.