Group and phase velocities for Rayleigh waves, in the period range 15–100 s, were analysed for paths crossing the Coral and Tasman Seas. We used data from 14 earthquakes recorded at the 6 World Wide Standard Stations: CTA, HNR, PMG, RIV, TAU, and WEL. By fixing the S-wave velocities at 4.65 km/s from 220 to 400 km and at 5.0 km/s for greater depths, we modelled the upper 220 km. As previous workers have found for oceanic regions, it was necessary to incorporate a significant low-velocity layer (LVL), usually centred at about 150 km, in all models. Typically the lid above the LVL has an S-wave velocity of 4.50 km/s, and the LVL a velocity of 4.25 km/s.