Seattle may have a reputation for months of overcast weather in the winter, but summer is beautiful with dramatic clouds and mild weather. My travel advice for touring the harbor area is to head back towards downtown at mealtime. Seattle is full of great restaurants, however the ones near the docks are touristy, expensive and mediocre.
For photographers doing Black and White conversions use lots of contrast and try the clarity slider if using ACR or Lightroom. In the HSL panel of Lightroom reduce the luminescence of the blue channel to darken skies. Avoid global use of the shadows and highlights sliders. Apply these locally with the adjustment brush.