Desaru was much hyped in the 80s with quite a few mega projects aimed at attracting foreign investment and visitors, which have since been abandoned. Today, it's strictly a local affair with the occasional Singaporeans thrown in: there are no chic boutiques, fancy restaurants or hip nightlife spots, just 22 kilometers of beach and a few aging resorts.
After a period of neglect, recently Desaru has become popular with tourists wishing to see a true Malay resort without for-tourists frills, and pundits have been predicting a renaissance since the much-delayed expressway from Johor Bahru opened in 2011.
Like all of Malaysia's east coast, Desaru is highly seasonal, with monsoon winds and rains lashing the coast between November and February. There is still plenty of sunshine even during the rainy season, but waves are high and it rains more. The "good" season is thus April to October, with June to August being the busiest months, when the waters are inviting and the sand fine.
Bus schedules are in flux and are likely to increase after the opening of the bridge.
There are direct Mara Liner  coach services four times a day from Johor Bahru's Larkin Bus Terminal to Bandar Penawar via Kota Tinggi at 10:30am, 1pm, 5pm and 8pm. The one-way fare is RM8.20. Alternatively, you can take a non-express bus from Larkin Bus Terminal (Maju 227 or Causeway Link 66) or from downtown Johor Bahru's Jalan Wong Ah Fook (Transit Link 41, Maju 227, Causeway Link 6B; the bus stop is opposite City Square) to Kota Tinggi's bus terminal (duration about 1h; Maju 227 one-way fare from City Square RM4.80; average frequency of Maju 227 is 15 min), and then take another bus from Kota Tinggi to Bandar Penawar (duration max. 1h, one-way fare RM4.50, frequency every 90 min).
From Bandar Penawar, you can either take a cab (teksi) for about RM10, or wait the minibus that will take you directly to Desaru Resort (the minibus is RM1, comes every 30 min). You can also take a cab from Kota Tinggi directly to Desaru Resort, this will cost you approximately RM35.
The long-awaited opening of the Senai-Desaru Expressway and its bridge across the Johor River has shaved an hour off travel time to Desaru, which is now just 60 minutes away from Johor Bahru. There are toll for cars and the distance from JB's tebrau highway is about 90km. Only 1 R&R from tebrau to Desaru and expect 1 shop that closes at night. From the toll at Desaru to the public beach, there are 3-4 resorts seen along the way while clear signage ensures that a first time visit to be of no hassle.
On a 200cc phantom bike, cruising at 80km, it will take about 1hour 20min from Aeon Tebrau to Desaru public beach.
Limbongan Maju Sdn Bhd (tel. (+607 8278002) operates 2 services daily on weekdays and 4 services daily on weenkends between Changi Ferry Terminal in Singapore and Tanjong Belungkor Ferry Terminal in Belungkor, Johor. Car ferries no longer in operation at the moment. The present service is operated using a passenger ferry with a capacity of about 120 passengers. The ferry operator currently charges S$24for one way and S$38 return.
At the Changi Ferry Terminal, visitors can still arrange for tours to the Desaru Fruit Farm as part of a tour package along with a stay at the Lotus Desaru Beach Resort. Other ground arrangements can be made via the ferry operator as well.
There is no public transport in Desaru. If you find yourself stuck with no bus to take you to Bandar Penawar, try asking the staff at the restaurant to call you a taxi. They know a lot of taxi drivers and most likely will love to help both you and their driver friend. The price should be around 15 RM to Bandar Penawar or 40 RM to Kota Tinggi.
There is little to see in Desaru itself, but Kota Tinggi is a fairly accessible daytrip destination.
Desaru is not a well developed resort, but there are a lot of things to do while you are there. Take advantage of the nice wide beach, and of the shallow and clear water. All 22 km of it is open to all, even the stretches in front of the hotels, but most locals congregate at the public beach, which provides a carpark, a few barbeque pits and grotty toilets. There is a small stall selling drinks while the car park has an entrance fee for vehicles. Motorbikes is 1RM based on 21Sep2013 visit.
Snorkeling is a good option, but don't expect banks of colorful fishes and wonderful sea creatures. Scuba diving here is out of the question, although some of the resorts do arrange trips out to Johor's northern islands.
One thing you can definitely try is surfing. If wind is good, the waves are quite OK, and especially the lack of jellyfish and sharks makes it an attractive location. During December, January and first half of February (monsoon season), the waves are almost constantly high, but do expect the water to be a little cold. There is a company that rents surf boards for 20 RM/h and provides surf lessons for 100 RM. The same company rents jetskis.
Excursions to see the fireflies (api-api) in the Sungei Lebam river are very popular. While theoretically possible to arrange yourself, this would require bumping about dirt roads to find the dock and then cruising around a pitch-black jungle river, so it's much easier to join one of the hotel excursions. The best time to go is after rain on a new moon.
Other options mostly of interest to families with young kids to entertain are:
The Tanjung Belungkor ferry terminal has no exchange facilities, but the hotels will change money in a pinch, and most shops and restaurants will accept Singapore dollars at a 1:2 ratio. You can find an ATM at the Petronas gas station at the highway 90 turnoff to Desaru. However if you mainly stay in your hotel and only go for the hotel excursions, you can basically bill everything to your room and pay by credit card.
At the public beach, there are a couple of stores selling soft drinks, beer and the sort, but you can find a store that sells branded t-shirts, Malay batiks and souvenirs.
You're pretty much stuck eating at your resort restaurants, which may have limited choices and are expensive. Even if you want to try the restaurant of the next resort, it can be a long distance to walk there.
However, if you have your own wheels or join one of the hotel-arranged "excursions", the fishing village of Sungai Rengit, some 30 km away, has a few seafood restaurants. (Oddly, the much closer Tanjung Balau does not have any.) There are also a few basic restaurants in Bandar Penawar.
Nightlife is limited to the hotel bars and even they're quiet, since most visitors are Muslim.
All hotel accommodation in Desaru dates from the early 1990s and looks like it. However, many hotels went through a round of long-overdue renovations to meet expected new demand after the opening of the expressway.
Desaru is a beach popular mostly with the locals. As such, especially if you go outside the resorts, you will see a lot of Malays bathing with long pants and t-shirts, a good way to both fend off the sun and to maintain modesty. For visitors, toplessness is not appropriate, but a normal bikini for girls and shorts for guys is ok.