Planning to come down for vacation in a couple of weeks...just thought I'd ask how the water is looking? Clear and calm?...or seaweed?

The water is clear and beautiful, and the weather is in the mid 80's.

You should be alright in a couple weeks. The normal spring fronts blowing through are starting to slow down and so are the seas. Seaweed isn't going to be a problem either, that's usually not till later in the summer. Enjoy.

Is the seaweed bad in October. We have never been that time of year and I was wondering about weather and water conditions?

October is the best month of the year! It edges out May, because the water is warmer, and there are fewer tourists. Typically, the water is clear, the humidity is low, air temps are in the 70s & 80s, insect activity is lower than summer months. The snowbirds have yet to arrive in large numbers.