The mol­ecular structure of the title compound is shown in Fig. 1 ▸. The CuII atom is coordinated by three O atoms and two N atoms from tridentate pyridine-2,6-di­carboxyl­ate (pdc), pyrazole and water ligands. The coordination geometry around the CuII atom is a distorted square pyramid as indicated by the τ value of 0.113 (Addison et al., 1984 ▸). The CuII atom lies in the center of the basal plane defined by two nitro­gen atoms (N2 from pdc and N14 from pyrazole) and two oxygen atoms (O9 and O12 from pdc). The plane including the CuII atom is almost planar, with an r.m.s. deviation of 0.0847 Å from the corresponding least-squares plane defined by the five constituent atoms. The pyrazole ring is twisted by 66.61 (10)° from the basal plane. The apical Cu1—O19 bond length of 2.217 (2) Å is much longer than those of the basal Cu—O lengths [Cu1—O9 = 2.026 (2) Å and Cu1—O12 = 2.058 (2) Å].