Surface (depth of 30 cm) water temperatures in Ranong ranged from 30.05–31.90 °C while in Phang Nga, they ranged from 30.01–31.25 °C. The highest sea surface temperatures were found in the western part of Khao Bang Chang (station 6) and Khao Phing Kan (station 40) (Tables 1 and 2). The sea surface temperatures in 37 of the 44 sampling stations were higher than 30 °C. The mean sea surface temperature in Ranong and Phang Nga was 30.60.4 °C. Fig. 4 shows the vertical profile of
the water temperatures at stations 6 (water depth 2.5 m) and 9 (water depth 20 m). These profiles indicate vertical mixing of water occurring around the study area.