This report describes the summer 2014 (Baseline 3) marine benthic monitoring, conducted in late January/early February, and presents a brief description of the benthic invertebrate communities, habitats, sediment types, and sediment contaminant concentrations found at each site. All samples collected were surface samples from either intertidal or subtidal locations. Sampling was conducted at 10 subtidal and 10 intertidal monitoring sites in Porirua Harbour, to quantify and describe benthic communities, sediment characteristics and sediment contaminant levels. Specifically, at the subtidal sites, eight 10 cm diam. x 15 cm deep cores were collected using divers, for macroinvertebrate identification and enumeration and three composite core samples were collected for sediment contaminant and grain size analysis. The surface sediment (0-3 cm) was removed from 5 or 6 smaller cores (7 cm diameter) and these fractions were pooled to produce a composite core sample for contaminant and grain size analysis. One core (13 cm diameter x 15 cm deep) was collected from each intertidal site at low tide from within one 5 m x 5 m grid to determine community composition. A 0.25 m² quadrat was also photographed adjacent to each macroinvertebrate core for later assessment of epifaunal invertebrate community and macroalgal cover. Three samples of surface sediment (0-2 cm) were collected from each site for sediment contaminant and grain size analyses. Three composite samples were prepared, by combining samples from grids A, B, C, D, E (sample 1), from grids F, G, H, I, J (Sample 2), and from grids K, L, M, N, O (Sample 3). All sediment contaminant samples were collected using clean HDPE plastic trowels and trays. Samples were sealed in double zip-lock bags and stored on ice until shipped to the laboratory for processing.