As of today, out of season, returns ~August. Earth Exhibit tracks the live conditions and flags it the moment it is on.
Each autumn, millions of monarch butterflies migrate along the Atlantic Flyway and form nightly roosts in trees around Cape May, New Jersey.
Observers see large numbers arriving at dusk and clustered in pines, bayberry, and other sheltering vegetation for several weeks each fall.
Where to see it
A taste of where to see it. The full map, exact coordinates and the best timing for each spot live in the app.
| Viewing spots |
|---|
| Higbee Beach Wildlife Management Area |
| Cape May Point State Park - Lighthouse Area |
| + 2 more spots, with exact coordinates and timing, in the app → |
This is the short version
This page shows a taste. The app has the full list of where to see this, the exact timing, and live conditions for 1,000+ natural phenomena worldwide, so you know the moment one is genuinely worth the trip.