Best time to go
A weekday morning is the calmest time for a high-street wander and gives you the best chance of easier parking. Late afternoon brings softer light across the stone buildings and can put the distant coast in better colour. Clear weather is worth waiting for if the views are the point, but keep a waterproof layer handy: the exposed streets and coast-facing outlooks can feel raw even when the valley weather looks settled.
Wear shoes with a good grip for the steep lanes, and leave time for the castle or beach rather than trying to turn Harlech into a packed checklist. It is a strong half-day base and a worthwhile cultural stop, but the town itself is compact and will not fill an entire day for most visitors.
