New Zealand Environmental Data Stack (NZEnvDS) comprises a set of 72 spatial layers for environmental modelling and site characterisation. NZEnvDS includes the layers that informed the Land Environments of New Zealand (LENZ), additional layers generated for LENZ that were never publicly released, and additional layers generated since, all covering mainland New Zealand and surrounding inshore islands. The original/top copy of the dataset is available at (https://doi.org/10.7931/m6rm-vz40), but the layers are reproduced here for ease of access. See (https://newzealandecology.org/nzje/3440/) for a publication describing NZEnvDS. Annual sum of monthly potential evaporation as estimated from monthly estimates of temperature, solar radiation, humidity and wind for the years 1950–1980 using the FAO-Penman method appropriate for grasslands (Doorenbos & Pruitt 1977).These water balance layers were generated at close to the same time as the other LENZ layers, but weren’t included in the package. Please cite the original paper as attribution when using these layers.