by KYW's Ian Bush

For the past couple weeks, the ocean water temperature has been hovering around the 70 degree mark -- a warm respite for shore-goers who've been shivering most of the summer.  But it's expected to get cooler again soon:

'Upwelling' has not been your beach buddy this summer:

"We've had this nice, southwest warm wind blowing, and what it does is it blows the surface of the ocean offshore."

To replace that water, Rutgers oceanographer Oscar Schofield says the cold stuff gets sucked up to the top -- right where you're swimming.

"What's really different about this one, it's almost been just one long perpetual event.  It hasn't been interrupted from winds blowing northeast, which would then blow the warm water back to the beach."

Schofield says while it might leave you blue, the natural phenomenon is great for fish who get to chow down on the population of plankton that's been growing gangbusters in the chill.