A Jumunjin morning combines a harbour or market visit with a separate coast stop. Start with the place that has the earlier opening, then protect the return connection before extending the walk.
Start with the market that is open
KTO lists Jumunjin Fish Market’s weekday hours as 07:00–22:00; its weekend hours are not specified in that listing. Jumunjin Pungmul Fish Market, across the road, is listed 08:00–19:30 weekdays and 08:00–20:30 weekends, closed the second Wednesday. Check the linked Fish Market and Pungmul Fish Market pages for the date.
Keep the shoreline optional
Jumunjin Port is at 1758-22 Haean-ro; the KTO listing describes it as a working fishing port. After the market, choose one public shore or harbour view and check how you will reach it. Wind, rain or wet ground can shorten the outdoor part without changing the meal plan.
Before entering the market, note the return stop and next departure. Check live bus service or arrange a taxi for the specific legs; do not assume nearby places share one timetable. If the return margin is short, finish after the meal and skip the extra coast stop.