They will play through the age groups from U7s up to U18s and across the complex.
“We’re very excited to be hosting this year’s Junior Siam Cup Festival,” said Guernsey Rugby Academy Director Andy Creber.
“This is probably one of the largest single sport events in the inter-insular calendar, with probably close to 700 young people, from six through to 18 (Colts), involved in competitive fixtures.
“It’s going to be a terrific festival atmosphere with plenty of rugby action and we’d love to see as many spectators as we can in attendance to cheer on our home teams.”
Games start at 11:00 with the Colts (U18) on the Garenne Pitch.
