"The important thing about this weather," Lawrence Kastle advised as he stood on the sidewalk yesterday afternoon on K Street NW," is not to get mad at it. That will only get you hotter.

"So just take it easy and relax," Kastle suggested, "or get out of here and go someplace else."

Washington's weather stayed hazy, hot and humid, but because it was Saturday with offices closed, thousands of people seemed to be taking one part of Kastle's advice or the other.

On Connecticut Avenue NW, the sidewalks were dotted with women walking slowly and carrying umbrellas to ward off the sun. Some people took to the city's pool.

The roads to the beaches were crowded. And at Ocean City, Md., officials reported that most hotels were full.

"It's summertime, so it's hot," said Jack Fagin, who described himself as a semiretired liqour store clerk. "I've been here 45 years, and it's like this every summer. So what can you do about it."

Yesterday the temperature reached 93 degrees at National Airport in mid-afternoon. But the air quality stayed relatively good, and unlike Friday there was no pollution alert.

In late afternoon there were thunder squalls over much of the area. But the relief they brought didn't last long and weather forecasters predicted that hot, humid weather would remain at least until Thursday.

"We don't see any break in this for the foreseeable future," said George Schielein, a forecaster for the National Weather Service. "It's nothing that's not normal for this area at this time of year."

Altough many Washingtonians seemed to have made their peace wuth the weather, the city's summer visitors did their sight-seeing and were clearly uncomfortable in their hot surroundings.

"I'm just a worn-out grandmother," said Loiuse Scott, of Corning, Ark., as she walked along 15th Street NW with her two grandsons "It's not unusual for me because I'm from the South but I still don't like it.

With 15 minutes a reporter encountered visitors from Germany, Chile, Wisconsin and Nigeria. All complained that the hot weather here was worse than where they came from.

"The first time I came to Washington it was about 102 degrees in the shade," Kastle recalled yesterday. "And I said I would never want to be here again. But I came back and I've been here for 35 years.

"Hot weather?" he continued. "It's just part for the course. Now you better slow down too."