This data includes the results of computer simulations for the article "Mitigating boundary effects in finite temperature simulations of false vacuum decay". We simulate first order false vacuum decay in a range of spinor gases (pseudo-spin-1/2 potassium-39, pseudo-spin-1/2 sodium-23, spin-1 rubidium-87) using the Stochastic Projected Gross-Pitaevskii equation. We examine the evolution of each system in both the presence and absence of boundaries.