Nantucket, Massachusetts, experiences typical New England summer conditions during July. This generally translates to warm, sunny days with average high temperatures in the low 70s Fahrenheit (low 20s Celsius). Overnight lows typically dip into the mid-60s Fahrenheit (high teens Celsius). Sea breezes moderate temperatures, providing relief from the summer heat. While July is generally dry, occasional rainfall and fog can occur. Water temperatures average in the high 60s to low 70s Fahrenheit (around 20 degrees Celsius), suitable for swimming and other water activities.
Understanding typical July conditions on Nantucket Island is crucial for planning a successful trip. Visitors can pack appropriate clothing, anticipate comfortable beach days, and schedule outdoor activities with a realistic awareness of potential weather variations. Historically, July has been a popular time to visit the island due to the favorable weather, coinciding with school vacations and offering optimal conditions for sailing, fishing, and enjoying the island’s scenic beauty.