Diveagar is in Raigad district of Maharashtra. It is around 160 Km from Pune.
A good trip to do is Diveagar, Srivardhan and Harihareshwar. It's a scenic journey through ghats. Try to do the journey in day time.
This is a nice beach with lot of water sports option available. There are also horse carts and motor vehicles. For brave hearts, there is Jeep parachute. Apparently I saw women mostly doing Jeep parachute. :)