Jenness Beach is generally safe for swimming during summer months when lifeguards are on duty, typically from late June through Labor Day. However, this beach is known for consistent surf and can have strong currents and undertow, especially during storms or high tide. Always swim near the lifeguard stand when present and check local conditions before entering the water. The rocky areas at either end of the beach can be hazardous. Red flag warnings indicate dangerous conditions when swimming is not advised.

Summer (June-August) offers the warmest weather with temperatures in the 70s-80s°F and staffed lifeguards, making it ideal for families. However, Jenness Beach is accessible year-round and attracts surfers in fall and winter when waves are larger. Spring and fall provide quieter visits with mild temperatures, though water remains cold. Weekdays are less crowded than weekends during peak season. Arrive early on summer days as parking fills quickly, especially during sunny weekend afternoons.

Jenness Beach has a paved parking lot on Ocean Boulevard (Route 1A) that accommodates approximately 75 vehicles. Parking fees apply from Memorial Day through Labor Day, typically around $15-20 per day for non-residents (rates subject to change). Rye residents park free with permits. The lot often fills by mid-morning on summer weekends. Limited street parking is available nearby but carefully observe posted restrictions. Arrive before 9am on peak summer days to secure a spot.

Jenness Beach has basic facilities including restrooms and outdoor showers. The Jenness Beach Bathhouse operates seasonally. For food, several options exist along nearby Ocean Boulevard including casual seafood spots and ice cream stands within walking or short driving distance. The larger town center of Rye and Portsmouth (about 15 minutes away) offer extensive dining and shopping. Accommodations range from nearby beachfront motels to vacation rentals, though many visitors stay in Portsmouth for more lodging variety.

Jenness Beach is one of New Hampshire's most popular surf spots due to its consistent beach break that works in various swell directions, particularly northeast and southeast swells. The beach features both lefts and rights, with waves suitable for beginners to intermediates during smaller conditions, though it can get challenging during larger swells. Fall and winter typically bring the best waves. The sandy bottom is forgiving for learners. Local surf shops in nearby areas offer rentals and lessons for those new to the sport.