Meilahti hosts a large amount of climbing from very easy to very hard, and from very low to very tall routes. The rock quality is very smooth and routes offer varying styles to climb on. There's something for everyone.
The sectors at Meilahti vary heavily in rock quality, shade and surroundings.
Seaside sector has very smooth rock and some polished holds, due to being eroded by the sea. Routes at the sea cliff dry very quickly after the rain. It's too hot for hard bouldering in the summer months, but is an excellent choice early in spring or late in autumn. Or, alternatively a great spot to hang out during the summer months for easier bouldering.
The main wall and the sectors around it (Right side sectors) are the ones that host the original and oldest routes. Most of the bouldering there is high enough to be dangerous and to have bolts at the top for toprope practice. Small middle wall provides similar rock and shorter routes. The three sectors on the right side have great shade, and are good for climbing, even in the hottest summer months.
Left wall is a surprisingly new addition. There are some tricky lowballs for pygmies, higher easier routes and a couple of harder compression problems. Rock quality there is a good, but a lot shoddier compared to Seaside- and Right side sectors.
The three other sectors (Seurasaari, Bulge and Park) All together host 6 routes, and are far away from the other sectors. For the adventurous ones after the "path least beaten" they provide a nice experience, but most will stay at the three other areas, containing almost 120 routes.