The direct answer

Barely — and the size of the effect is small enough to sit inside the normal hour-to-hour noise of deer movement. Four independent GPS-collar research programs have tested moon phase or moon position against measured deer movement, and every one of them found an effect too small to plan a hunt around: Penn State's does moved about 6 meters per hour more on a new moon than a full moon, against a background range of 0 to 2,748 m/hr for that herd. Mississippi State's 48 collared bucks moved about 4 yards per hour more on the "best" solunar full-moon days, with no meaningful change in bedding behavior. Auburn's study of moon position — the actual mechanism solunar tables are built on — found activity dropped during the overhead and underfoot windows instead of rising, the opposite of the prediction. Compare any of that to the rut, which nearly doubles movement, or to hunting pressure, which is the largest documented driver of deer behavior in the literature, and the moon isn't in the same conversation. It's still useful — for planning a dark walk-in and knowing your light for a blood trail — just not for predicting when deer move.

What the research actually found

Penn State Deer-Forest Study — GPS-collared does, Pennsylvania

The Deer-Forest Study out of Penn State fitted adult does with GPS collars and tracked hourly movement from October 2015 through 2016. Comparing new moon to full moon, the difference was about 6 meters per hour — against an hourly movement range for the same deer of 0 to 2,748 meters per hour. The researchers' conclusion was direct: the moon-phase effect was insignificant.

Mississippi State Deer Lab — 48 GPS-collared bucks, central Mississippi

The Mississippi State Deer Lab collared 48 bucks and tracked them September through February in central Mississippi, testing both moon phase (the illumination cycle) and moon position (overhead or underfoot — the actual solunar mechanism). On the "best" solunar full-moon days, bucks moved about 4 yards per hour more than average, with no meaningful change in how long they spent bedded. The lab's own summary of the position data was blunter still: most of the apparent changes actually reflect zero. For scale, the same research measured the rut's effect on the same herd: movement nearly doubled, from a baseline of about 219 yards per hour to roughly 400 yd/hr during the rut. The lab also surveyed roughly 1,400 hunters and found 83% believed the moon affected deer movement — which is worth sitting with, because that's most of the readers of this page. The belief is reasonable to hold; it's also not what the collars showed.

Auburn University / SEAFWA 2016 — "Movement with the Moon," 38 GPS-collared bucks

Published in the SEAFWA Journal, this study tracked 38 adult bucks via GPS every 30 minutes across two rut seasons (August–December, 2010–2012) and tested the mechanism solunar tables are actually built on: moon position, not just phase. Near the full or new moon, activity probability during the moon-overhead window fell from 0.540 to 0.413; during the moon-underfoot window it fell from 0.516 to 0.305. Both moved in the opposite direction from the solunar prediction — deer were less active during the "major" solunar periods, not more. The authors' own conclusion: solunar chart relationships to deer activity "may be misleading."

Webb et al. 2010 — fine-scale GPS movement

A fine-scale GPS movement study reached the plainest verdict of the four: "neither localized weather events... nor moon phase seem to affect fine-scale movements of deer."

Where the "rutting moon" comes from

Charles Alsheimer's "rutting moon" theory — that peak rut activity tracks the second full moon after the fall equinox — comes from hunting media, not a research program. Rut timing is set by photoperiod: shortening daylength drives melatonin duration, which drives the breeding cycle. That's also why regional rut timing repeats within days of the same date year after year (see our state-by-state rut calendar) regardless of what the moon happens to be doing that year.

What actually moves the needle

The moon-phase research keeps coming back small. These don't.

Wind

Penn State's wind analysis covered more than 1,700 deer-days. Ninety percent of surveyed hunters predicted deer move less in wind. The collars said the opposite for bucks: movement increased significantly at 16–27 mph, regardless of rain. Does barely responded to wind either way.

Barometric pressure

The specific "29.90–30.30 inHg sweet spot" that circulates in hunting content has no traceable citation back to a study. Penn State's own storm-movement analysis (2015–17) found deer moved 102–105 yards per hour in the 24 hours before a storm system arrived, against a normal baseline of 102–111 yd/hr — not a meaningful difference.

Cold fronts

Tested directly and falsified: no measurable difference in movement before, during, or after frontal passage.

Rain

Rain alone can cut buck movement roughly in half. But if wind picks up alongside the rain, wind wins and movement climbs back up.

Hunting pressure

This is the largest documented effect in the deer-movement literature, bar none. South Carolina DNR collared roughly 40 does over three years and logged more than 160,000 locations. Deer didn't respond to hunting pressure in general — they responded to localized pressure, shifting to nocturnal movement and specifically avoiding the individual stands, food plots, and feeders that had been hunted, even at low intensity.

FAQ

Does moon phase affect deer movement?

Barely. Penn State's GPS-collared does showed about a 6 meter-per-hour difference between new and full moon, against an hourly range of 0 to 2,748 m/hr for the same herd — the researchers called it insignificant. Mississippi State's 48 collared bucks moved about 4 yards per hour more on peak solunar full-moon days, with no meaningful bedding-time change. Both are small enough to be noise next to the rut, wind, or hunting pressure.

Are solunar tables accurate for deer hunting?

The study that tested the actual mechanism — moon overhead or underfoot — found activity fell during those windows instead of rising. Auburn's 38 collared bucks showed activity probability dropping from 0.540 to 0.413 (overhead) and 0.516 to 0.305 (underfoot) near full and new moon, the opposite of the solunar prediction. The study authors concluded the solunar-chart relationship "may be misleading."

What is the best moon phase to hunt deer?

There isn't one with real weight behind it. The largest moon-phase effect measured in this research — Mississippi State's 4 yards per hour on the best solunar days — is a rounding error next to wind, rain, and hunting pressure. Plan your hunt off the rut calendar and the pressure history of your stand, and use moon phase for logistics, not prediction.

Does the "rutting moon" predict the rut?

No peer-reviewed study supports it. It originates in hunting media (Charles Alsheimer), not a research program. Rut timing tracks photoperiod — shortening daylength sets melatonin duration, which sets the breeding cycle — which is why regional rut dates repeat within days year after year.

Does barometric pressure affect deer movement?

The commonly cited "29.90–30.30 inHg" window has no traceable source. Penn State's storm analysis found 102–105 yd/hr in the 24 hours before a storm versus a normal 102–111 yd/hr baseline — not a meaningful gap. Cold fronts specifically were tested and showed no difference before, during, or after passage.

Do deer move in high wind?

Yes. Across more than 1,700 deer-days, Penn State found bucks significantly increased movement at 16–27 mph wind regardless of rain, even though 90% of hunters surveyed predicted the opposite. Does showed little response either way.

What actually predicts deer movement?

In rough order of documented effect size: the rut (measured movement nearly doubling, roughly 219 to 400 yd/hr), localized hunting pressure (South Carolina DNR's ~40 collared does and 160,000+ locations showed deer avoiding specific hunted stands and going nocturnal, even under light pressure), wind speed, and rain — with moon phase and barometric pressure trailing well behind all of them.

Sources

• Penn State Deer-Forest Study — "Does the Moon Affect Deer Movement?"
• Mississippi State Deer Lab — moon phase, moon position, and hunter survey findings
• Auburn University / SEAFWA Journal 2016 — "Movement with the Moon"
• Penn State Deer-Forest Study — wind, barometric pressure, and cold-front movement analyses
• South Carolina DNR — hunting pressure and localized avoidance study