Summer swim teams are the version most families start with. The season runs June through August, practices happen in the morning at a local pool or community center, and meets are Saturday mornings with ribbons and parent-run timing systems. Cost runs $75 to $200 for the season. The emphasis is participation, improvement, and kids learning to race. It is a good first experience with competitive swimming, and a lot of kids swim summer league for years without ever moving to club.
Club swimming, also called year-round or USA Swimming club, is a different animal. These are member clubs of USA Swimming that practice 10 to 12 months a year. Practice frequency at the entry level (novice or developmental groups) is two to four days per week. At higher levels, elite age-groupers practice once or twice a day, six days a week. The season includes sanctioned meets from fall through spring, with some clubs competing through the summer as well.
Club swimming is what produces competitive swimmers. Kids who want to race seriously, improve their times systematically, and eventually compete at the high school varsity level or beyond need the technical coaching and volume that club provides.
Cost is the most significant dividing line. Club swim fees run $150 to $400 per month depending on the program and practice group. Add meet entry fees ($25-75 per meet, multiple meets per month at higher levels), team gear, and travel to away meets, and a full club year runs $2,500 to $6,000 or more.
For an eight to ten-year-old, the decision is not complicated. Start with summer league. If after one or two summers the kid is asking about getting faster, asking why the other kids at the meet are better, or showing a genuine interest in the technical side of swimming, that is the signal to look at club. Summer league as a foundation, club as the next step when the kid earns it by showing they want it.
The one thing to watch for: some club programs accept kids as young as six. An eight-year-old who trains year-round with a serious club is ahead technically but also absorbing a significant schedule and commitment at an age where variety still serves them well. There is no rush, and the kids who start club at nine or ten and love it typically catch up to the early starters within a year or two.