The most central municipal bath is Vestkantbadet, Sommerrogate 1 (tel. 22-56-05-66), which offers a Finnish sauna and Roman baths. This municipal bath is near the American embassy, just a kilometer (1/2 mile) north from Oslo's center. It's primarily a winter destination and is closed in July. Admission is 80NOK ($12/£6.55). The baths are open May to mid-August Monday to Friday 1 to 6:30pm, and are reserved Thursday for women only. From mid-August to April, the baths are open Monday and Wednesday 1:30 to 6:30pm, Tuesday and Thursday to Friday 1:30 to 7:30pm, and Saturday 10am to 2:30pm. Prices for massages start at 350NOK ($54/£29) for 30 minutes. If you book a massage (tel. 22-44-07-26), you can use the baths free.
Frognerbadet, Middelthunsgate 28 (tel. 23-27-54-50), in Frogner Park, is an open-air pool near the Vigeland sculptures. The entrance fee is 67NOK ($10/£5.50) for adults and 30NOK ($4.60/£2.45) for children. It's open mid-May to mid-August Monday to Friday 7am to 8pm, Saturday and Sunday 10am to 6pm. Take tram no. 2 from the National Theater.