The Brighton MuseumBrighton Museum in the grounds of the Royal Pavilion It is free to enter and houses an eclectic mix of, for example, Polynesian war masks, Art Deco pottery and furniture, Brighton town history and clothes fashion over the last 100 years.  Not much here for a serious historian, perhaps, but it's an interesting place to go if you want to get out of the rain for free.  There's also a tea room on the Minstrel's Gallery.

One place you must see is The Royal Pavilion The Royal Pavilion, Brighton, UK the opulent seaside home of the Prince Regent, George IV (1762-1830).  Here he entertained the rich and famous on a lavish and spectacular scale.  Prepare to be amazed.

Another place where the entertainment is free to enter is Brighton Pierhttp://www.brightonpier.co.uk/indexfl...   It has penny arcades, a funfair, a fortune teller, a ghost train, go cart racing, a bar and a fish and chip restaurant.  The place is brash, vibrant and noisy - and loads of fun.

If you have your own car and want to get out of town for a few hours, you may want to visit  Jack and Jill, a pair of  windmills set high on a hill (only Jill is open). Check this website for opening dates and travel route.  http://www.jillwindmill.org.uk/JJWelc... Visit Jill when she is in sail (working) and the wind is strong.  It's like being on a galleon.  A great experience.  While you're there, walk along the South Downs (the local range of hills) for a while to enjoy some lovely views of coast and countryside.

Hove Lagoon, at the western end of the Brighton and Hove seafront, offers windsurfing lessons. Check it out here. http://www.hovelagoon.co.uk/activity....  There is also a safe and quiet children's play area at Hove Lagoon.  The Hove end of the seafront, about 2km from Brighton town centre, is generally much quieter and away from the hustle and bustle of the main town.