Raptor Migration: When and Where to Watch Hawks This Fall
Autumn turns ridge tops into raptor highways — a cold front with a northwest wind can push thousands of broadwings past a single lookout in a day.
The migration calendar
| Species | Peak movement | Notes |
|---|---|---|
| Broad-winged hawks | Mid–Sep | The kettling spectacle — 10,000+ days possible |
| Sharp-shinned & Cooper’s | Late Sep–Oct | Accipiters hug cover, fly forest edges |
| Peregrines & merlins | Late Sep–Oct | Follow coastlines and lake shores |
| Red-tailed hawks | Oct–Nov | The classic ‘hawk watch’ bird |
| Golden eagles | Late Oct–Nov | Ridge lift specialists, often singles |
| Rough-legged hawks | Nov | Arctic breeders arriving south |
How to pick your day
Northwest winds behind a cold front, mid-morning to mid-afternoon, is the canonical recipe. Raptors ride thermals and ridge lift; on still warm days they drift high and wide, on north winds they pack the ridgelines in visible streams. Hawk-count sites publish daily totals — check before you drive.
Frequently Asked Questions
When is hawk migration season?
August through December, peaking by group: broadwings mid-September, accipiters and falcons late September–October, red-tails and eagles October–November.
Why do hawks kettle in circles?
Kettles are birds riding the same thermal — climbing together to the top before gliding onward to the next lift. Broad-winged flocks can number thousands for this reason.
What’s the best time of day to hawk watch?
Mid-morning to mid-afternoon once thermals form. Rain or south winds ground migration; the first clear day after a front is prime.
Do raptors migrate at night?
Diurnal raptors migrate by day using lift. Owls migrate at night — which is why dawn banding stations catch them.
Keep Reading
These are all experiences I've gained from keeping raptors, hope they help you~ Feel free to leave a comment if you have questions, I reply to all messages!