Hurricane Erin (2025) was an unusually large Atlantic hurricane, with a wind field close to the upper end of what is typically seen for storms of its strength.

Quick Scoop: How big was Hurricane Erin?

  • At its mature stage, Erin’s tropical-storm-force winds (about 63–118 km/h) extended roughly 500–520 km (about 310–325 miles) from the center.
  • That means the overall wind field was close to 900 km (around 560 miles) wide from one side of the storm to the other.
  • Earlier in its life, Erin’s wind field was already very broad, spanning nearly 575 miles (about 925 km) of tropical-storm-force winds along the U.S. East Coast, making it larger than most hurricanes of similar intensity in that region since the satellite era began.
  • The inner eyewall itself expanded significantly during eyewall replacement cycles, with the eye diameter growing from roughly 6–12 miles (9–19 km) to around 45 miles (75 km).

How “big” is that in context?

  • Erin’s size put it around the 90th percentile in terms of hurricane size for storms of similar strength and location in recent decades, meaning it was bigger than the vast majority of comparable hurricanes.
  • Only a handful of storms like Hurricane Sandy have been larger near the U.S. Atlantic coast in the modern satellite era.

In practical terms, a storm this wide can generate dangerous surf, rip currents, and coastal flooding over a very long stretch of coastline, even if the center never makes landfall.

TL;DR: Hurricane Erin’s wind field was roughly 900 km (about 560 miles) across at its peak, putting it among the largest Atlantic hurricanes of comparable intensity observed near the U.S. East Coast.

Information gathered from public forums or data available on the internet and portrayed here.