Tamarindo feels like a small surf town that never quite grows up. Warm sun most days. Hot, humid afternoons in the green season and cool, dry mornings in high season. The vibe is laid back. Locals, surfers, and expats mix easily. Most travellers enjoy the friendly bars and the beach scene. For some, the nightlife will be amazing. Arguably not the best place if you want absolute quiet.
Cost of living is lower than big cities but higher than tiny beach villages. You can find cheap eats and nicer places if you look. Internet is solid in town. I had good video calls from a few cafes and from a coworking space. I read about a lively Thursday potluck at one coworking spot and a beach volleyball game that fills up fast. Things to do are endless: surf, yoga, boat trips, and wildlife walks nearby. The nomad community is active. People trade tips and rides to surf spots. Perfect if you like work, waves, and new friends.