July in Keansburg is the warmest month of the year. In July, the weather in Keansburg is typically warm. Average daily high temperature in July is about 27 degrees above zero. On average, Keansburg has 13 sunny, 11 partly cloudy, and 7 rainy days in July. The rains are usually moderate. July as well as August and September is considered the most comfortable time to visit Keansburg.