If you use the shortest route to Dapoli, Dapoli is just about 185 kms from Pune and 215 kms from Mumbai however it is better to use the NH 17 till Khed and use the SH104 to reach Dapoli considering the current road condition.
Karde is about 12 kms from Dapoli. Once you reach Dapoli one needs to head north on SH 96 on the route which leads to Anjarle. Approximately 10 Kms from Dapoli you would find the sighboard to Durga Devi temple. Take the left turn which leads towards Murud Harnai beach. Approximately 500 mts before you reach Murud Harnai there is a left turn which leads to the Karde beach.