I'm Robert Gilbert, owner of Archery Sarasota and a USA Archery Level 3 NTS certified coach. I tune bows year-round in Sarasota, and I hear the same story every summer. A shooter set up their bow in January, hit a solid tune, printed a sight tape, and felt good. By June they're back in my shop asking why their 40-yard groups have opened up by three or four inches. The bow hasn't been dropped. Nothing was changed. Florida happened.
Heat and humidity don't announce themselves as tuning variables. They work slowly, in the garage, in the car, in the transition from your air-conditioned house to the outdoor range. By the time you notice the groups shifting, the cumulative drift is already weeks old. This post covers what's actually happening, which changes matter most, what you can check yourself, and when you need a press and a technician.
Quick answer: Florida shooters should run a full tune check and chronograph verification at least twice per year. Once in winter, once in the heart of summer. Don't wait for your groups to tell you something is wrong.
What Heat Does to Arrow Speed
Warmer air is less dense than cold air. A lighter air column resists the arrow's passage a little less, so the arrow reaches the target slightly faster. The effect is real but modest. At typical archery distances (20 to 60 yards), the density difference between a 50-degree January morning and a 90-degree July afternoon produces maybe 1 to 3 fps of raw air-resistance change. That alone won't wreck your sight tape.
The bigger contributor is the bow itself. Warmer limbs are slightly more elastic. They store and release energy a bit more efficiently than cold, stiff limbs. The result is a small increase in arrow speed as ambient temperature climbs. For a compound bow running around 280 fps, moving from cool-weather tuning to Florida summer conditions can shift arrow speed by roughly 3 to 8 fps depending on your setup, string material, and draw weight.
Five fps sounds small. But a sight tape built for 275 fps will print about two inches low at 50 yards if your bow is actually pushing 280. Verify with a chronograph at each season change rather than assuming your winter number still holds. Mark the reading and the date. You'll know immediately when something has shifted.
What Humidity and Heat Do to Strings and Cables
Modern string materials, BCY-X, 452X, Dyneema-based blends, are hydrophobic and highly resistant to moisture absorption. That's a good thing. But "resistant" is not the same as immune, and heat is a separate variable from moisture.
String creep is the slow permanent elongation of a string under load over time. It happens faster in heat. A string that took six months to stabilize in a cool climate might re-creep noticeably through a Florida summer, especially during the first season of a new set. Creep extends the string, which lowers draw weight slightly and raises draw length slightly. Both changes affect arrow speed. Both show up on a chronograph before you'd notice them by feel.
Serving is the thread wrap that protects high-wear areas: the cam tracks, the peep, the nock point. Florida's humidity finds its way into the space between serving and string. Over time this promotes serving separation, which looks like gaps or raised loops in the thread wrap. Once serving separates at the cam track, string wear accelerates fast. Check serving visually every 4 to 6 weeks. You're looking for any area where the serving thread has lifted, gapped, or shifted from its original position.
Peep rotation is related. A peep that was perfectly aligned in January can drift from heat-induced string twist changes or serving settlement. Shoot five arrows in a row and watch whether the peep hole faces you consistently or rotates. A drifting peep is a tuning variable most shooters ignore until it costs them a shot. If yours is moving, bring it in. Correcting peep rotation requires a press.
Knots at the cam, the string stop, and any tie-in points can also settle with temperature cycling. If you see any loop that looks looser than it did, that's a press visit. Don't shoot it.
What a Hot Car or Garage Does to Your Bow
A car interior in Florida summer can reach 140 to 160 degrees Fahrenheit on a sunny day. That temperature range is enough to soften adhesives, cause limb tip overlays to shift, and push modern string materials past their safe heat threshold. It can also affect cams and any plastic or composite components.
Adhesive joints at risk include your arrow rest mounting pad, any limb bolt accessories, scope lens retaining compounds, and the bond between limb tip overlays and the limb itself. The adhesive may re-cure slightly differently when it cools, leaving a component that looks intact but is no longer seated at the original angle. A rest that moved 0.5mm in a hot car can ruin your horizontal groups without you ever seeing the shift.
Modern carbon-riser bows handle heat better than older aluminum frames with glued components, but no compound bow should sit in a closed vehicle on a Florida summer day. Store the bow in a bag in the shade, bring it inside with you, or keep it in a padded insulated case if it has to stay in the vehicle for a short time. Never leave it in a closed trunk or on a rear seat.
Home garages are almost as bad. An unventilated Florida garage in July can hit 110 to 120 degrees. If your bow lives on a rack in the garage, consider a wall-mounted AC unit or moving the rack inside. A year-round Florida shooting setup deserves climate-controlled storage. The investment is smaller than a new set of limbs.
Check your bow after any prolonged heat exposure. Look at the rest position, the limb tip overlays, the peep alignment, and the nock set. Shoot a few arrows at a short distance and compare groups to your baseline before trusting the setup at distance. Our bow tuning service includes a full heat-damage assessment for bows that have spent time in a hot Florida vehicle or garage.
Condensation and the AC-to-Outdoors Transition
Here's one almost no one thinks about. You grab your bow from inside the air-conditioned house, walk out into 88-degree air at 85% relative humidity, and within 30 to 60 seconds moisture condenses on every cold metal surface. Cams, cables, string, metal sight components, scope lens.
A few minutes of shooting warms those surfaces enough to clear the moisture. The issue is what happens if you're doing this repeatedly every day for months. Condensation cycles drive moisture under serving thread and into the small gaps around cam axles and bushings. Over a full summer, this contributes to wear and corrosion in places you can't see during a casual visual check.
The fix is straightforward. Let the bow acclimate for 5 to 10 minutes before shooting, especially when moving from aggressive AC to hot humid outdoor air. Do not start your warm-up shots immediately after taking the bow outside. If you notice any fogging on scope lenses after the transition, that's a sign your scope's sealing has failed and moisture is getting inside. A fogged scope needs attention before it wrecks your lens coatings.
The condensation issue also works in reverse. Taking a hot, humid bow into very cold AC storage (think arriving home from a tournament, throwing the bow in the closet next to the AC vent) can cause thermal shock in the limbs and glue joints over time. Don't aim vents directly at stored bows.
When to Re-Check Tune: Florida-Specific Schedule
Shooters in cold-climate states often tune once a year and hold it. That cadence doesn't fit Florida. You have year-round shooting, dramatic humidity swings, and heat cycles that would be considered extreme weather anywhere else. Here's what I recommend for Florida archers:
- Full tune and chronograph check twice a year. November and May cover the two biggest seasonal transitions. November catches any summer-creep before the fall shooting season. May catches the winter-to-summer transition before the heat peaks.
- Chronograph check every 8 to 10 weeks if you shoot tournaments or hunt year-round. Ten minutes with a Labradar or portable chronograph tells you whether arrow speed has moved. If it has, you know before your groups drift, not after.
- Visual serving and peep check monthly. Walk the string with your eyes and look for separation, gaps, or rotation. Five minutes standing at your range or in your garage.
- After any heat exposure event. Left the bow in the car? Let it cook in the garage during a trip? Check it before you shoot it at distance. Short-distance groups at 10 yards won't reveal a half-millimeter rest shift. Long-distance groups will.
These aren't extraordinary measures. They're just the maintenance schedule that matches the environment you're actually shooting in. If you want to understand the full at-home tuning process in detail, the compound bow home tuning guide covers the step-by-step procedure for verifying nock travel, rest height, cam timing, and paper tuning between pro-shop visits.
What You Can Check Yourself vs. What Needs a Press
Some heat and humidity effects are visible without any tools. Others require a press to diagnose or fix correctly. Knowing the difference saves you from both wasted range trips and dangerous DIY attempts.
You can do these yourself without a press:
- Visual inspection of serving for gaps, separation, or lifted thread
- Peep rotation check: shoot 5 arrows, watch for consistent or drifting peep orientation
- Chronograph check to catch arrow speed drift
- Arrow rest visual alignment against your baseline reference photo
- String twist count against your baseline (requires a paint-pen reference mark)
- Paper tuning at close distance to check for tear direction changes
- Cam lean visual against your original setup photos
These require a press and a technician:
- Peep rotation correction (re-positioning requires taking the bow off tension)
- Serving replacement at cam tracks or nock point
- Draw length or draw weight adjustment beyond turn-in/turn-out range
- Cam timing correction after string creep has offset the timing marks
- Any string or cable replacement
- Arrow rest repositioning after adhesive failure
If you find press-level issues during your self-check, stop shooting and bring the bow in. Shooting a bow with separated serving at the cam track or a timing offset that has grown past one visible mark is how you accelerate damage. The bow is telling you it needs attention. Listen to it.
How We Handle This for Clients
Every bow that comes through our shop for a seasonal tune gets a baseline temperature-corrected speed reading. We note the date, the ambient temperature, and the measured arrow speed. When the same bow comes back in six months, we compare against that baseline before touching anything else. If speed has moved more than 5 fps, we know to look at string creep and serving before adjusting the sight tape. If it's within 2 fps, we know the string has stabilized and the shift is weather-related. Those are two different diagnoses with two different fixes.
We also photograph every bow's starting position: cam alignment, rest height and angle, peep position, and any unusual wear points. When clients come back after a Florida summer, we have something to compare against. That reference is the difference between a confident tune and guessing in the dark.
For clients who shoot year-round, we offer a standing check-in protocol: bring the bow in with a half-dozen arrows, we run a quick chronograph check and visual inspection, and you're back out the door in 20 minutes. If everything looks stable, that's the confirmation. If something has drifted, we catch it before it affects your shooting. Details are on the bow tuning services page.
Florida is a great place to shoot year-round. You just have to maintain the bow like it lives in Florida, not like it lives in Michigan. Twice-a-year tune checks, monthly visual inspections, a chronograph in your range bag, and climate-controlled storage cover most of what Florida will throw at your equipment.
