Arrive 30 minutes early
Parking and sidewalks fill quickly near sunset, especially on warm weekends and festival nights.
Congress Ave Bat Bridge Sunset
Austin bat bridge countdown, tonight's sunset timing, season status, best viewing spots, and a 7-day emergence outlook.
Congress Avenue Bridge
Bat Bridge Sunset
Wednesday, March 18 in Austin. Plan your arrival around sunset for the best chance to catch the emergence stream.
Season StatusActive
March through October is the primary viewing season when the bridge colony is consistently active at dusk.
Estimated Emergence In
19Hours
42Minutes
41Seconds
Tonight's target: 8:01 PM
Mexican free-tailed bats typically begin streaming out around 20 minutes after sunset.
Sunset
7:41 PM
Emergence Estimate
8:01 PM
Best Arrival
7:31 PM
Tips For Tonight
Expect a rolling emergence
The first wave can start around 20 minutes after sunset, then intensify for 30-60 minutes.
Weather changes visibility
Clear and calm nights usually produce the longest visible stream. Cloud cover can hide the flight path.
Bring water and bug spray
Evening humidity is high around the lake. Lightweight layers and mosquito protection make it easier to stay.
Bat Facts
- Estimated colony size
- ~1.5 million Mexican free-tailed bats in peak season
- Scale
- One of the largest urban bat colonies in North America
- Nightly impact
- Consumes tons of insects through the warm season
- Migration pattern
- Most bats migrate south from late fall through winter
7-Day Emergence Outlook
Sunset and emergence times are astronomical calculations for Austin. Visibility is a modeled cloud estimate.
Estimated conditions
Wed
Mar 18
- Sunset
- 7:41 PM
- Emergence
- 8:01 PM
- Arrive by
- 7:31 PM
Partly Cloudy Visibility: Good
Cloud cover estimate: 55%
Thu
Mar 19
- Sunset
- 7:41 PM
- Emergence
- 8:01 PM
- Arrive by
- 7:31 PM
Partly Cloudy Visibility: Good
Cloud cover estimate: 69%
Fri
Mar 20
- Sunset
- 7:42 PM
- Emergence
- 8:02 PM
- Arrive by
- 7:32 PM
Cloudy Visibility: Limited
Cloud cover estimate: 83%
Sat
Mar 21
- Sunset
- 7:43 PM
- Emergence
- 8:03 PM
- Arrive by
- 7:33 PM
Cloudy Visibility: Limited
Cloud cover estimate: 91%
Sun
Mar 22
- Sunset
- 7:43 PM
- Emergence
- 8:03 PM
- Arrive by
- 7:33 PM
Cloudy Visibility: Limited
Cloud cover estimate: 89%
Mon
Mar 23
- Sunset
- 7:44 PM
- Emergence
- 8:04 PM
- Arrive by
- 7:34 PM
Cloudy Visibility: Limited
Cloud cover estimate: 76%
Tue
Mar 24
- Sunset
- 7:44 PM
- Emergence
- 8:04 PM
- Arrive by
- 7:34 PM
Partly Cloudy Visibility: Good
Cloud cover estimate: 55%
Bat emergence estimates use Austin astronomical calculations (30.2672°N, 97.7431°W) with a +20 minute emergence offset.