Chanthaburi combines an old town, fruit-growing districts and a long coast. Pick the setting first; do not treat the province as one walkable temple group.
A town temple can fit with markets and the cathedral quarter. A rural or coastal temple may need a car and a separate half-day. Check the full road journey before adding it to a short city visit.
The retained tourism source supports the provincial frame. It does not prove a founding story or today's opening time for every temple.
Cover shoulders and knees, remove shoes where asked, and ask before taking photographs. Ceremonies can change access without notice.
Heat and rain slow the coastal roads. Keep the old town, museums or food markets as a backup if a distant stop no longer fits.