Today's high and low tide times for Marathon, FL, plus a 7-day tide table. Astronomical predictions from the nearest harmonic station — free and updated daily.
In Marathon, FL, the next high tide is at 5:03 AM (0.25 m) and the next low tide is at 9:39 AM (0.12 m), based on harmonic predictions for VACA KEY, USCG STATION, FLORIDA BAY.
All high and low tides for Marathon today, in local time (America/New York). Heights are metres above chart datum.
High (H) and low (L) tide times and heights for the next seven days at Marathon.
| Date | Tides (local time · height) |
|---|---|
| Sun, Aug 16 | H 5:03 AM 0.25 mL 9:39 AM 0.12 mH 5:00 PM 0.29 mL 10:33 PM 0.07 m |
| Mon, Aug 17 | H 6:09 AM 0.24 mL 10:09 AM 0.14 mH 5:15 PM 0.30 mL 11:27 PM 0.05 m |
| Tue, Aug 18 | H 7:18 AM 0.22 mL 10:39 AM 0.17 mH 5:09 PM 0.32 m |
| Wed, Aug 19 | L 12:21 AM 0.03 mH 8:36 AM 0.21 mL 11:03 AM 0.19 mH 4:42 PM 0.33 m |
| Thu, Aug 20 | L 1:12 AM 0.02 mH 10:00 AM 0.21 mL 11:24 AM 0.21 mH 4:57 PM 0.35 m |
| Fri, Aug 21 | L 2:09 AM 0.01 mH 5:27 PM 0.36 m |
| Sat, Aug 22 | L 3:06 AM 0.01 mH 6:03 PM 0.36 m |
Predicted from VACA KEY, USCG STATION, FLORIDA BAY, 1.6 km away (reliability: high — a close match — expect predictions within a few minutes of the published station table).
These are astronomical tide predictions — the rise and fall driven by the moon and sun, computed by harmonic analysis. They do not include weather effects: a strong onshore wind, low barometric pressure or a storm surge can push the real water level above the predicted high, and offshore winds or high pressure can hold it below the predicted low. For navigation or any safety-critical decision, always check the official tide tables and a live water-level gauge for Marathon.
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