The thermal evolution of structural and magnetic details of the orthovanadate TmVO3, studied in detail by neutron and synchrotron powder diffraction, is reported. Crystallizing in space group Pnma at room temperature, TmVO3 undergoes a first structural phase transition to P2(1)/a at T-OO = 180 K, where a G-type orbital ordered state develops. At T-S = 75 K, a change back to Pnma occurs, and the establishment of C-type orbital order takes place. The V3+ ions order antiferromagnetically with a magnetic propagation vector k = 0 below T-N1 = 105 K, while the Tm3+ sublattice orders at T-N2 = 20K following the same propagation vector. Between T-N1 and T-S, a coexistence of G-type (P2(1)/a) and C-type (Pnma) orbital ordered states exists. The P2(1)/a phase is magnetically separated into two fractions, which adopt a C(x)C(y)0 and G(x)00 coupling, respectively, while the Pnma volume fraction follows a 0G(y)0 magnetic structure. At T-N2, the appearance of the Tm sublattice magnetization (0C(y)0) leads to a spin flop transition of the V sublattice from 0G(y)0 to G(x)00. The results are presented and analyzed in the general context of the series of RVO3 compounds, and they are used to discuss recent magnetization results.