Hurricane Erin is an unusually large and powerful hurricane. As of August 21, 2025, its size was as follows:
- Diameter of hurricane-force winds: about 150 miles
- Diameter of tropical-storm-force winds: about 480 miles
At its peak intensity on August 16, Erin was a Category 5 hurricane with maximum sustained winds of 160 mph and a minimum central pressure of 915 mb. The hurricane's tropical-storm-force wind field extended nearly 575 miles across, which is significantly larger than most hurricanes of similar intensity. Erin's size was compared to the width of the state of Montana, spanning about 530 miles across, whereas a typical hurricane is about 300 miles in diameter. Erin's large size contributed to widespread hazardous surf, dangerous rip currents, coastal flooding, and elevated surf conditions along the U.S. East Coast, despite it not making landfall. Its outer bands extended so far that the impact was felt from the Carolinas up to the Northeast. In summary, Hurricane Erin is vast, with tropical-storm-force winds stretching nearly 480-575 miles wide and hurricane-force winds about 150 miles wide, making it one of the larger hurricanes in recent history by wind field size.
