You have three options: get in by train, bus, or car. To plan your train or bus trip, use translink (http://www.translink.co.uk/jp/jpclient.exe?NewQuery=NewQuery).
Use your own two feet! If you don't have a car, plan to do a lot of walking and riding the bus. Both can work fine, even in the off season. If you do plan to walk pack sturdy, comfortable shoes--waterproof if possible.
In Portrush take a walk along the beach and see the beautiful Northern Ireland coast. You can walk east or west. If you walk east, you'll eventually get to White Rocks beach, and beyond that is Dunluce Castle and Giant's Causeway. Without kids, you can walk Portrush-->Dunluce Castle-->Portballintrae-->Giant's Causeway, and take the bus back from Giant's Causeway-->Portrush in one day (leaving around 11 am and return around 7 pm).
The set of harbour restaurants, the '''Ramore Wine Bar''', '''Coast Pizza''', and the '''Harbour Bar''', are worth a try. Expect to wait because they are very popular.
Eat at Mr. Chips. There is a Mr. Chips take-out and a sit down, both on Eglinton St. A fish and chips meal recently cost __5.
Uncle Saam's (at 35 Eglinton St) is a simple restaurant with decent food. For example, a cheeseburger with chips will cost around __5.
Enjoy a pint at The Quays, also on Eglinton St.
Anvershiel House B&B is divine. Address: 16 Coleraine Rd, Portrush, NI. Phone: 028 7082 3861. Web: www.anvershiel.co.uk. En suite room for two persons __55. Erna and Victor run a great establishment and provide a delicious breakfast!
There are at least two hotels, as well as many bed and breakfast guest houses.