August in Great Smoky Mountains National Park is a good month: highs around 86°F, lows around 63°F. Crowds: peak crowds — #1 busiest of the park's 12 months. Hazy, hot afternoons — mornings are the play. The editorial best window here is June & October. You get about 13h 30m of daylight. To finish Alum Cave Trail (2h 5m) before dark, leave the trailhead by about 6:17 PM.
Month data reviewed · how we check this
| Verdict | Good A solid visit with a caveat — usually crowds or heat. |
|---|---|
| Temps °F | 86° high / 63° low |
| Crowds | peak crowds · #1 busiest of the park's 12 months |
| What August is like | Hazy, hot afternoons — mornings are the play |
| Best window (whole year) | June & October |
| Peak crowds (whole year) | Jun–Aug, Oct |
CROWDS: RELATIVE SEASONALITY FROM NPS VISITATION STATISTICS · TEMPS: APPROXIMATE NOAA NORMALS AT MAIN VISITOR ELEVATION — HIGH COUNTRY RUNS 10–20°F COLDER
DAYLIGHT ON AUGUST 15 · LOCAL PARK TIME (EDT)COMPUTED FROM THE PARK'S OWN COORDINATES FOR THE 15TH — THE MIDDLE OF THE MONTH STANDS FOR IT, AS IT DOES FOR CLIMATE NORMALS. WITHIN A MONTH THESE TIMES SHIFT BY UP TO AN HOUR
LEAVE THE TRAILHEAD BY — TO FINISH BEFORE DARK ON AUGUST 15WALKING TIMES ESTIMATED FROM EACH TRAIL'S MEASURED DISTANCE AND ELEVATION GAIN — A PLANNING FIGURE, NOT A PACE. ADD YOUR OWN MARGIN FOR PHOTOS, REST AND CROWDS. WATER AT THE HOT-WEATHER RATE, BECAUSE THIS MONTH AVERAGES 86°F. TRAILS WE HAVE NOT MEASURED ARE LEFT OUT RATHER THAN GUESSED
WHAT AUGUST ASKS OF YOU HEREGreat Smoky Mountains National Park in September — Good, highs around 81°F, crowds: busy (cooler air arrives; elk rut begins in cataloochee).
Our verdict for August is "Good". A solid visit with a caveat — usually crowds or heat. Expect highs around 86°F and lows around 63°F, with crowds at the "peak crowds" level. Temperatures are approximate NOAA normals at the main visitor elevation; crowd levels follow published NPS visitation statistics.
Across the full 12-month review, the best window is June & October, and the peak-crowd months are Jun–Aug, Oct. August itself we rate "Good".
About 13h 30m on August 15: the sun rises around 6:53 AM and sets around 8:22 PM local park time (EDT). Computed from the park's own coordinates, so it is the light you actually get at the trailhead, not the nearest city's.
Alum Cave Trail takes about 2h 5m of walking, so on August 15 you would need to leave the trailhead by about 6:17 PM to finish before dark — the sun sets around 8:22 PM local park time (EDT). Walking times are estimated from each trail's measured distance and elevation gain, so treat them as a planning figure and add your own margin for photos, rest and crowds.
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