One of the most underrated seaside day trips from Barcelona is the sleepy town of Premia de Mar. This small, historic town retains its original charm while welcoming a bit of a hipster vibe.
Begur and Sa Tuna are slightly further afield than some others on this list. Still, taking a seaside day trip from Barcelona to Begur and Sa Tuna will take under two hours.
Cadaqués is my personal favorite town to visit for a seaside day trip from Barcelona. It’s truly magnificent, with a steep, hilly maze of streets and whitewashed buildings.
Finally, the picturesque coastal town of Tossa de Mar. This is a must-visit seaside day trip from Barcelona. The coastline here is rather jagged, but also boasts a beautiful castle.