Quick answer

Weekday mornings after clear weather are easiest

The best first visit is usually a clear-weather weekday morning with normal-looking flow, daylight for the walk out, and room in the Route 30 pull-offs. Summer weekends can be beautiful and crowded at the same time.

Seasons

Spring, summer, fall, and winter

Spring: cold water, runoff, mud, and fast changes. Walk first, wade only when the river is clear and calm.
Summer: best swimming weather, more bugs, tighter parking, and more need for quiet and privacy.
Fall: cooler water, wet leaves, shorter daylight, and quieter banks.
Winter: limited access and no casual swim assumptions.

Timing

Best time of day and week

Mornings tend to be calmer for parking, trail pace, and heat. Weekends and hot afternoons bring the most pressure. If the pull-off is full, do not improvise parking.

Skip it

When to choose another day

Skip swimming after heavy rain, flooding, fast current, cloudy water, thunder, unsafe footing, or crowding that leaves no room for privacy. Use Conditions, Water Safety, Map, and Visit before driving.