Get set for summer: Wet

Imaginative Traveller is offering the chance to sail Croatia's rivers this summer

Jump into the warm waters of the Aukstaitija National Park in Lithuania, the location for SwimTrek's (01273 739713; swimtrek.com) latest four-day wild swimming breaks. The small-group trip for strong swimmers, led by experienced guides, follows a circular 25km route, hiking through pinewoods and swimming in some of its 130 lakes. It costs £380 per person, including B&B, lunches and fully guided tour with safety escort. Minimum age 16. Departs Tiki Inn in Ignalina on 28 July and 1 August. Excludes flights.

Dip into Croatia for a family adventure that promises all sorts of aquatic thrills, from white-water rafting on the Cetina and Vrlika rivers to sea kayaking on the Adriatic. The 12-day "Croatian River Adventure" with Imaginative Traveller (0845 287 2439; imaginative-traveller.com) costs £995 per adult and £896 per child under 11, excluding flights. Departs Split on various dates in July and August.

New to the surf scene in Portugal, Surfers Lodge Peniche (00 351 262 700 030; surferslodgepeniche.com), about an hour's drive from Lisbon, has designer coastal quarters for holidaymakers close to the Supertubos break. This place isn't just a looker, it's got a good surf school, too, and it caters for all abilities with small groups of six tutored in the art of riding the waves on some of the country's best beaches for breakers. Seven nights costs £2,070 for two adults and two children in a double and twin room, including B&B and four 90-minute surf lessons per person. Excludes flights.