so DCA is in the mid 50s at the moment (same here too - 55F). It's going to be close to see if we get to 32F. If the wind dies down, no chance. But a steady NW / NNW wind might do it. The river is pretty warm now though (nearly 70F in the Washington channel, so knock off a few degrees for the water by the airport) - so that will help to keep temps up obviously.