Harbor Island, Aransas Channel — TX, United States

Tidal currents & slack water

↑1.9 kn↑1.0 kn09:4421:26Now
Tidal current at Harbor Island, Aransas Channel, computed from harmonic constituents. Slack water on Mon 19 Oct 2026 at 21:26.
↑7:30am↓6:55pm

Predictions are not observations — conditions vary with weather and river flow. Not for navigation.

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Slack water and maximums for the next 7 days

Mon 19 Oct 2026 through Sun 25 Oct 2026. All times are local to Harbor Island, Aransas Channel (America/Chicago). What slack water is, and why it isn’t high or low tide.
DayCurrentTimeSpeed
Mon 19 Oct 2026Max flood1.9 kn
Mon 19 Oct 2026Slack
Mon 19 Oct 2026Max ebb1.0 kn
Mon 19 Oct 2026Slack
Tue 20 Oct 2026Max flood1.9 kn
Tue 20 Oct 2026Slack
Tue 20 Oct 2026Max ebb0.9 kn
Tue 20 Oct 2026Slack
Wed 21 Oct 2026Max flood1.7 kn
Wed 21 Oct 2026Slack
Wed 21 Oct 2026Max ebb0.7 kn
Wed 21 Oct 2026Slack
Thu 22 Oct 2026Max flood1.2 kn
Thu 22 Oct 2026Max flood0.6 kn
Thu 22 Oct 2026Slack
Thu 22 Oct 2026Max ebb0.3 kn
Thu 22 Oct 2026Slack
Fri 23 Oct 2026Max flood0.7 kn
Fri 23 Oct 2026Max flood1.3 kn
Fri 23 Oct 2026Slack
Fri 23 Oct 2026Max ebb0.1 kn
Sat 24 Oct 2026Slack
Sat 24 Oct 2026Max flood0.2 kn
Sat 24 Oct 2026Slack
Sat 24 Oct 2026Max ebb0.3 kn
Sat 24 Oct 2026Slack
Sat 24 Oct 2026Max flood1.8 kn
Sun 25 Oct 2026Slack
Sun 25 Oct 2026Max ebb0.1 kn
Sun 25 Oct 2026Max ebb0.6 kn
Sun 25 Oct 2026Slack
Sun 25 Oct 2026Max flood2.2 kn

Station facts

Position
27.8467° N, 97.0608° W
Time zone
America/Chicago
Source
NOAA harmonic constituents
Region
TX, United States

How we check predictions — dated samples and their limits.

Nearby

All current stations