Well, spoke too soon perhaps. Now everything in that link above just cooled down about 3 degrees, so next Thursday is in the 70's w/ showers? I guess if it's windy & cold on Friday you'll have more exciting water, but hopefully it's not too bad. I've rafted in the cold before and as soon as you get in the 42 degree water you don't really notice.. if anything the cooler ambient temp makes the water less of a shock.