Swimming at the 2003 South Pacific Games took place from 30 June to 7 July in Suva, the capital of Fiji.

The pool events were held on the first 6 days in the 50m (long-course) pool at Fiji's National Aquatics Centre, and a 3 kilometre ("3K") open water race was held at Pacific Harbour on Monday, July 7, 2003.

[1] Overall, Papua New Guinea's Ryan Pini (male) and New Caledonia's Diane Bui Duyet (female) were named "Swimmers of the Meet" for their overall performances: Pini won 7 events, 4 in record time and earned 12 medals overall; Bui-Duyet won 10 events with 5 games records, and 11 medals in total.

[2] Monday, July 7: men's and women's 3,000m Open Water swim.

[9] 101 swimmers from 9 countries took part in the swimming competitions at the 2003 South Pacific Games (team size in parentheses):[11]