Studies on the spatiotemporal distribution monitoring of light fishing fleets are limited due to extensive study area, data availability, dynamic distributions, limited monitoring technology, and perception of the fishers. This study aims to monitor and estimate the density of light fishing fleets, representing the centre of fishing areas. Using the visible infrared imaging radiometer suite of boat detection data combined with actual fishing data, the pattern of spatiotemporal distribution of light fishing fleets was analysed, displayed with the variations in sea surface temperature and chlorophyll-a concentrations. This study was carried out at west Sumatera waters. The actual fishing data, light fishing fleets data, and environment parameter data were collected in 2014-2018. The calculation of the geographical distribution was carried out using the geographical information system models with four spatial indicators, i.e., central tendency, spatial dispersion, directional dispersion, and directional trends. The results showed various patterns and behaviours on light fishing fleets spatial distribution. We also revealed the spatiotemporal pattern dynamic of the geographic distribution of light fishing fleets in the west Sumatera waters. The distribution pattern was random compared to the sea surface temperature distribution. On the other hand, it was quite centralized following the chlorophyll-a concentration. The distribution of light fishing fleets was dominant in the area with high chlorophyll-a concentration.