Saint Marks River at San Marcosde Apalachee State Park — FL, United States

Tide times & tide chart

1.9 ft3:21am2.8 ft8:35am0.8 ft4:38pm2.4 ft11:43pmNow
Tide predictions for Saint Marks River at San Marcosde Apalachee State Park, computed from harmonic constituents. High 2.8 feet on Mon 19 Oct 2026 at 08:40, low 0.8 feet on Mon 19 Oct 2026 at 16:40, above MLLW, the chart datum.
↑7:41am↓7:01pm

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

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Tide times for the next 7 days

Mon 19 Oct 2026 through Sun 25 Oct 2026. All times are local to Saint Marks River at San Marcosde Apalachee State Park (America/New_York). Heights are in feet above MLLW.
DayTideTimeHeight
Mon 19 Oct 2026Low1.9 ft
Mon 19 Oct 2026High2.8 ft
Mon 19 Oct 2026Low0.8 ft
Mon 19 Oct 2026High2.4 ft
Tue 20 Oct 2026Low1.7 ft
Tue 20 Oct 2026High2.7 ft
Tue 20 Oct 2026Low0.8 ft
Wed 21 Oct 2026High2.6 ft
Wed 21 Oct 2026Low1.3 ft
Wed 21 Oct 2026High2.8 ft
Wed 21 Oct 2026Low0.7 ft
Thu 22 Oct 2026High2.9 ft
Thu 22 Oct 2026Low0.9 ft
Thu 22 Oct 2026High3.1 ft
Thu 22 Oct 2026Low0.7 ft
Fri 23 Oct 2026High3.2 ft
Fri 23 Oct 2026Low0.5 ft
Fri 23 Oct 2026High3.3 ft
Fri 23 Oct 2026Low0.8 ft
Sat 24 Oct 2026High3.5 ft
Sat 24 Oct 2026Low0.1 ft
Sat 24 Oct 2026High3.5 ft
Sat 24 Oct 2026Low0.9 ft
Sun 25 Oct 2026High3.6 ft
Sun 25 Oct 2026Low-0.2 ft
Sun 25 Oct 2026High3.5 ft
Sun 25 Oct 2026Low1.1 ft

Station facts

Position
30.1503° N, 84.2106° W
Time zone
America/New_York
Datum
MLLW datum · computed from harmonic constituents
Source
Harmonic constituents from TICON-4
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). Source: Hart-Davis, M., Dettmering, D., Seitz, F. (2025), TICON-4: TIdal CONstants based on GESLA-4 sea-level records, SEANOE, https://doi.org/10.17882/109129. Licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Modified: see https://github.com/openwatersio/slackwater-database#modifications-to-source-data

How we check predictions — dated samples and their limits.

Nearby

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