For a concert-led visit, I'd begin with the venue rather than assume there is one central arena: the listings here point to Róisín Dubh on Dominick Street, the Black Box at Eyre Square and Leisureland in Salthill. That spread makes a central base useful, but not every post-show walk is the same. From Eyre Square, you can reach the Latin Quarter on foot; Salthill is a longer outing, so I'd plan the return instead of improvising it after a late set.
My harbour-pilot answer to the question crews always asked-'Do we have time?'-is to plan around the next leg, not just the departure. In Galway, that means checking the venue and the walk before you book the night.
For a Róisín Dubh show followed by a Salthill day, Park House Hotel is about a 30-minute walk from the Prom and just 200 metres from Galway Train Station and Eyre Square (I have, admittedly, underestimated a post-gig walk before). Its air-conditioned rooms include free Wi-Fi, laptop safes and tea and coffee facilities; the hotel also has an award-winning restaurant and Boss Doyle's Bar. (central hotel)
Tonight, 31 October 2026, And So I Watch You From Afar & Caspian play Róisín Dubh at 19:30. The event is over-18s, with ID required; I'd keep the evening simple and stay close enough to walk back after the show.
On 16 November, Jeff Tweedy is scheduled for 19:00 at the Black Box, beside Eyre Square; the listing is for over-15s. That venue is an especially convenient anchor for a central stay. I prefer these compact, venue-led plans to trying to cram a whole city into one concert evening (a lesson learned by a man who once thought every connection would line up). 
For the Black Box concert, The Dean Galway is a short walk from Eyre Square and roughly a 30-minute walk from Salthill Promenade (I'd still save my energy for the show). Rooms have air-conditioning, a work desk, minibar and free Wi-Fi; facilities include a swimming pool with a view, sauna, fitness centre, terrace and free bicycles. Its restaurant serves American and Italian dishes, with brunch, lunch and dinner. (city-centre stay)
For a Black Box evening or a train-and-coach arrival, The Victoria Hotel is beside Eyre Square and the stations, with Salthill about a 30-minute walk away (I'd leave a little room in the plan for the return). It has a restaurant and full-service bar; its Queen Street menu includes vegetarian and vegan options, and rooms have private bathrooms, TVs and tea and coffee facilities. (property details)
On a non-show afternoon, I'd walk the Latin Quarter from Eyre Square toward the river: Shop Street and Quay Street connect medieval lanes, Lynch's Castle and St Nicholas' Collegiate Church. The church is Galway's oldest building, recorded from 1320; allow about 45 minutes for a self-guided visit, or an hour with a tour. The Saturday market gathers around it from 08:00 to 18:00, a good way to turn a simple walk into a local-food stop.
At the Spanish Arch, Galway City Museum traces the city's archaeology, history and sea connections; admission is free, with a suggested donation. A redevelopment is under way, so I'd check the current visitor arrangements before setting out. If the evening still has room, Tig Cóilí's trad sessions run at set times through the week. Trust me, a slower afternoon makes the gig feel like part of a trip rather than the whole trip.
For a Black Box performance and an easy start from Galway's transport hub, The Hardiman sits at Eyre Square, about a 30-minute walk from Salthill Promenade (I like having the evening's route in hand before the first drink). Its rooms include marble bathrooms, designer toiletries, Chromecast TVs and complimentary Wi-Fi; Gaslight Brasserie, Oyster Bar and Parlour Lounge are on site. (hotel details)
Salthill is worth giving its own stretch of the itinerary. The Prom runs for about 2 kilometres toward the Blackrock diving tower; walking it is free, and the local custom is to kick the wall at the end for luck. Galway Atlantaquaria, on Seapoint Promenade, focuses on native Irish species and runs talks and feeding sessions through the day. I like this as the unhurried counterpoint to a late concert; it's also an easy rainy-day alternative to staying outdoors.
On 27 February 2027, Jarlath Regan's 'Craic Pot' is listed at Leisureland in Salthill. The show is scheduled for 19:00, and under-14s must be accompanied by an adult. If the trip is built around this date, I'd choose the Salthill walk and aquarium for the daytime rather than add a long excursion. (Galway hotels and apartments) 
For a walk between the Spanish Arch, Latin Quarter and Salthill, The House Hotel is about 15 minutes on foot from the Prom and sits in the historic Latin Quarter near Quay Square (I'd pick this when the coastal walk matters as much as the gig). Its art deco interiors are in an old stone building; individually decorated rooms include soundproofed windows, laptop safes, satellite TVs and coffee machines. (booking details)
My favourite plan is simple: pick the show first, use the old town for a daytime wander, then give Salthill a proper walk rather than treating it as a quick detour. Galway's music and coast fit together especially well when the night's venue and the next morning's route are both part of the plan. There's no need to hurry every leg (I've learned that one the slow way). You won't want to leave the conversation-or the next set-unfinished.