The aim of this work was to register the temperature influence on the water stress resistance under different temperatures. Selected seeds of Peltophorum dubium (Spreng) Taubert were choosen for this work. Four simultaneous replicates of 50 seeds were used in each test. The seeds were previously scarified with sulfuric acid (during 20 min.) washed and distributed in sterilized Petri dishes having filter paper moistened with test-solution (PEG 6000 or mannitol) presenting different values of osmotic potential ranging from 0.0 to -2.0MPa. Under optimal temperature (27°C) significative reductions on the rate were observed since -0.2MPa for PEG or mannitol solutions. The germinability was significantly reduced at -0.6MPa and -0.8MPa for PEG and mannitol, respectively. Under suboptimal temperature (24°C) significative reductions on germinability and rate was registered since -0.6MPa and -0.2MPa, respectively when PEG solutions were employed. Under supra optimal temperature (30°C), the values of rate and germinability decreased significanty since -0.2MPa using PEG or mannitol. P. dubium seeds are resistant to water stress, presenting a tolerance limit between -1.2MPa and -1.4MPa for PEG or manitol solutions under 24 and 27°C respectively. The maximal tolerance limit was reduced to -1.0MPa under 30°C. Above the maximal tolerance limit (-1,6 to -2,0MPa), it was verified a secondary dormancy. After 21 days under water stress a recovery response was registered for the seeds maintened in PEG or mannitol solutions.