Steady-shear and dynamic rheological behaviour for aqueous systems of guar and tragacanth gums and mixed systems tragacanth-guar, in wide ranges of shear rate (0.01–1000 s−1), angular frequency (0.1–62.8 rad s−1) and temperature (5–65 °C) were determined using a controlled stress rheometer. Total polymer concentration of 10 g L−1 was used in all systems and mixtures were prepared at three polymer ratios (0.25:0.75, 0.5:0.5, 0.75:0.25). Flow curves showed that apparent viscosity depended on both shear rate (shear-thinning behaviour) and temperature. Mixed systems showed a synergic effect on apparent viscosity, being more remarkable at low shear rates and low temperatures. Functions involving the effect of shear rate and temperature were proposed applying Cross-Williamson model and Arrhenius relationship. Storage and loss moduli increased with angular frequency at any temperature and decreased with increasing temperature. Tragacanth gum system was predominantly viscous in the whole range of angular frequency and temperature, without moduli crossover. Guar gum system showed predominant elastic behaviour at high angular frequencies, from 5 to 45 °C. Analogously, as observed for apparent viscosity, a synergic effect dependent on angular frequency and temperature was found. Mechanical spectra were correlated with temperature by means of simple Maxwell model and Arrhenius function. In all cases, the correspondence between steady-shear and oscillatory data was satisfied using Cox-Merz rule.