Global climate change has a significant impact on the evolution of lake environments and ecosystems, with negative consequences for ecosystem services. The decrease in wind speed may promote the outbreak and floating accumulation of cyanobacterial blooms in eutrophic lakes. In previous studies, it was often difficult to accurately quantify the effect of wind on cyanobacterial blooms due to the low observation frequency of real-time synchronous monitoring of wind speed and chlorophyll-a concentration. Based on ground-based hyperspectral proximal sensing technology, high-frequency observation of real-time synchronous monitoring of wind speed and chlorophyll-a concentration was carried out at minute and hourly scales. Through statistical analysis of the chlorophyll-a concentration in the surface water of Lake Taihu during the cyanobacterial growth period from June to October, the high-frequency dynamic change characteristics of cyanobacterial blooms were quantified, and the wind speed threshold of floating aggregation of cyanobacterial blooms was determined. It was found that as the wind speed decreased, the concentration of chlorophyll-a in the surface water increased and so did the probability of cyanobacterial blooms. The probability analysis showed that when the near-surface wind speed was less than 2.5 m/s, the obvious cyanobacterial bloom was easily formed on the lake surface, with the occurrence probability of cyanobacterial bloom greater than 55.1%. Low wind speed for a long time is easy to induce cyanobacteria bloom formation and floating aggregation, and chlorophyll-a usually recovers to a higher level within 1-2 days after strong wind and wave events, which provides a new perspective for managers to effectively prevent and control cyanobacteria bloom. Under the influence of climate change, the wind speed in the Lake Taihu area showed a significant decreasing trend, which increased the competitive advantages and the occurrence probability of cyanobacteria bloom. In the future climate change scenario, if the wind speed continues to decrease, the occurrence probability of cyanobacteria bloom on the lake surface may increase under the same nutrient conditions, which increases the difficulty of cyanobacteria bloom prevention and control. Therefore, higher requirements for nutrient control in the watershed and lake body are needed to mitigate cyanobacteria blooms.