In Raigad district of Maharashtra there is beautiful city of Shrivardhan. It has now turned to awesome seaside resorts, along with nearby town of Harihareshwar, which has famous 100 year old Shiva temple.
I had visited both the places (Shrivardhan and Harihareshwar) in month of June which was early start of rains. Shrivardhan has many beaches (line a necklace) and with beautiful beach to visit like Diveagar Beach and Kondivali Beach.
Many people across Maharashtra and Goa do visit Shrivardhan, Harihareshwar and the nearby beaches all round the year. As to see the beauty of Beach in Shrivardhan and visit the oldest temple of Lord Shiva at Harihareshwar.
One should visit these place especially in Early rainy season it close to 178 kms from Mumbai and 160 kms from Pune. One good Picnic location to travel... and adventure spot as well....