Positioning for beach portraits
Place your subject or subjects to one side, with the beach shoreline filling the rest of the frame. This will allow the person to pop out from the picture, while still providing a lovely setting for a portrait.
Get up close
You are shooting something big: the beach. But remember who your subject is: the person or people. They should dominate the photo, not be a blurry, tiny image lost in the frame.
Get up close to the person you are shooting so that they fill about a third of the frame.
Catch the action
Not all portraits need to be posed. Look for candid picture possibilities. Instead of people squinting or scowling in the picture, catch them splashing or chatting or playing with sand and a bucket.
This is a wonderful way to catch memories and moments, not just cheesy poses.