Onion Key — FL, United States

Tide times & tide chart

0.3 ft6:39am0.7 ft10:35am0.1 ft7:10pmNow
Tide predictions for Onion Key, NOAA reference highs and lows, adjusted by published offsets. High 0.7 feet on Mon 19 Oct 2026 at 10:40, low 0.1 feet on Mon 19 Oct 2026 at 19:10, above MLLW, the chart datum.
↑7:25am↓6:53pm

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

Slackwater predicts tides and currents offline, on your phone — tides worldwide, currents across the US and Canada.

Download on the App StoreSlackwater

Requires iOS 26 or later.

Tide times for the next 7 days

Mon 19 Oct 2026 through Sun 25 Oct 2026. All times are local to Onion Key (America/New_York). Heights are in feet above MLLW.
DayTideTimeHeight
Mon 19 Oct 2026Low0.3 ft
Mon 19 Oct 2026High0.7 ft
Mon 19 Oct 2026Low0.1 ft
Tue 20 Oct 2026High0.6 ft
Tue 20 Oct 2026Low0.3 ft
Tue 20 Oct 2026High0.7 ft
Tue 20 Oct 2026Low0.1 ft
Wed 21 Oct 2026High0.7 ft
Wed 21 Oct 2026Low0.3 ft
Wed 21 Oct 2026High0.7 ft
Wed 21 Oct 2026Low0.2 ft
Thu 22 Oct 2026High0.7 ft
Thu 22 Oct 2026Low0.2 ft
Thu 22 Oct 2026High0.8 ft
Thu 22 Oct 2026Low0.2 ft
Fri 23 Oct 2026High0.8 ft
Fri 23 Oct 2026Low0.1 ft
Fri 23 Oct 2026High0.8 ft
Fri 23 Oct 2026Low0.2 ft
Sat 24 Oct 2026High0.8 ft
Sat 24 Oct 2026Low0.1 ft
Sat 24 Oct 2026High0.8 ft
Sat 24 Oct 2026Low0.2 ft
Sun 25 Oct 2026High0.8 ft
Sun 25 Oct 2026Low0.0 ft
Sun 25 Oct 2026High0.8 ft
Sun 25 Oct 2026Low0.2 ft

Station facts

Position
25.6117° N, 81.1333° W
Time zone
America/New_York
Datum
MLLW datum · NOAA reference highs and lows, adjusted by published offsets
Source
NOAA tide offsets from 8725110
Region
FL, United States

Heights are measured above chart datum. A negative height means there is that much less water than the charted depth shows.

Slackwater database (https://github.com/openwatersio/slackwater-database)

How we check predictions — dated samples and their limits.

Nearby

All tide stations