It's not the first time in recent years that the drivers from Dublin Bus have gone on strike, impacting the city's residents and thousands of visitors. I wrote about the last time here and much of the information is the same but there are new alternatives.
For tourists visiting Dublin, it can be tricky but there are alternatives to using Dublin Bus for getting around the city.
The two non-interconnecting lines of the Luas will be operating, although at peak times will be incredibly busy with extra customers. The coastal rail line known as the DART also will be operating as usual, covering Malahide and Howth north of Dublin to Greystones in Co. Wicklow.
Taxis are also operating, Uber will be available too and good old walking shoes can do a lot if you just move your legs around!
Dublin is quite an easy city to walk around, Guinness Storehouse and Kilmainham Gaol are a little far out for many people but still easily walkable and everything else of note is doable by foot.
Or you could rent a bike using the Dublin Bikes.
Don't forget that Dublin sightseeing bus tours (green buses), the airlink from Dublin airport, tours to Malahide, Glendalough, the Ghost Bus and 1916 tour will all NOT be operating.
So if you are planning to do a hop-on hop-off bus tour then choose the red City Sightseeing Tour https://citysightseeingdublin.ie/ or Dublin Cityscape Tour http://cityscapetours.ie/
Just don't book anything operated by Dublin Bus unless you want to waste time and money.
Getting from the airport is best done by using Aircoach or if you are going to an unusual part of the city, by taxi.
Remember you can combine seeing the city with Panoramic Ireland's Dublin Photography Tours https://panoramicireland.com/dublin - a perfect way to see Dublin and learn how to make better images.