The 2026 Perseid forecast says the shower cannot be properly viewed from latitudes north of about 60°N.
This limitation is mainly geometric. The Perseid radiant is far north in the sky, but at very high northern latitudes its daily visibility and altitude do not provide the same useful dark-sky observing window available farther south. Summer twilight also remains a serious problem at high northern latitudes.
The boundary is approximate rather than an abrupt physical cutoff. Observers north of 60°N may still see some Perseid meteors under favorable conditions, particularly when the radiant is above the horizon and the sky is dark enough. “Properly viewed” refers to effective observation of the shower, not total invisibility.
The opposite geographic issue affects much of the Southern Hemisphere, where the radiant remains comparatively low. Mid-northern latitudes therefore offer the most favorable overall viewing geometry.