Arrive at your chosen beachfront resort (recommend The Leela Kovalam or Turtle on the Beach) and settle into a sea-facing room to relax after travel; this sets a calm tone for the weekend.
Take a private or shared boat cruise through mangrove-lined estuaries and the Neyyar river mouth; cruises usually run 7:00–17:00 and are very peaceful in the morning.
Head inland (≈1–1.25 hr) to Neyyar Dam area for nature, views and wildlife activities; plan arrival in the afternoon when the gardens and crocodile farm are open.
If you’d like a cultural stop, the ancient Janardhana Swamy Temple is typically open in the morning (roughly 4:00–12:00) for a short visit and blessings.
If timings work, visit Padmanabhaswamy Temple (check: typical darshan hours morning and evening) or relax with coffee at a cosy café in Trivandrum before departure.