Climate change, a long-term effect of global warming, causes changes in the aquatic environment that impact the growth of Sargassum in floating net cages. Monitoring growth during climate change is necessary to develop appropriate methods for obtaining good Sargassum growth results during both the rainy and dry seasons. Sargassum growth is strongly influenced by fluctuations in water quality that occur due to differences in environmental conditions between the rainy and dry seasons. Changes in temperature, salinity, and nutrient content during seasonal changes can affect Sargassum growth. The highlight of this research is monitoring the growth of Sargassum for one year in the waters of Ekas Bay, Lombok, Indonesia, to observe the algae's response to seasonal water quality dynamics. The purpose of this study was to analyse the growth of Sargassum aquifolium cultivated for one year. This research was done from December 2023 to November 2024. The research method used was the experimental method of cultivating directly in the sea, using the floating raft with a size of 8m x 8m. The sampling method of Sargassum sp. growth was carried out by weighing the cultivated Sargassum sp. The results showed that the highest absolute weight growth was obtained in January which was 135 g and the lowest was in November which was 11.8 g. The highest specific growth rate was obtained in January which was 135 g and the lowest in November which was 11.8 g. The highest specific growth rate was obtained in January which was 6.31% and the lowest was in November which was 1.005%. Seaweed aquaculture activities can be said to be optimal if the value of the growth rate exceeds 2%. January provides the highest absolute weight production due to weather conditions that support the growth process. The conclusion of this study is that most of the growth rate in each month is more than 2%, so it can be said that Sargassum can grow optimally.