450 Gradi is a pizzeria and Italian restaurant at Periskopvägen 19 on Lidingö. It is in an AGA heritage-listed property, with views over the entrance to Saltsjön, according to the restaurant. The menu includes wood-fired pizzas, other Italian dishes, delicatessen items and house-made gelato in seasonal flavours. Visit Stockholm describes the pizza as thick Neapolitan-style, made with Italian 00 flour.

There is outdoor seating and a garden by the water, with an outdoor bar; an indoor bar is available year-round. The restaurant says the outlook over the water is enjoyed in summer and winter. Its website offers table booking, and the restaurant says visitors can arrive on foot, by bicycle, car, tram, bus or private boat. Visit Stockholm recommends it as a place to eat after exploring Lidingö. The restaurant says it was named one of Sweden’s best pizzerias from 2018 to 2024.