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 6:03 AM (0.7ft) and the next low tide is at 9:21 AM (0.5ft), 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) |
|---|---|
| Tue, Sep 15 | H 6:03 AM 0.7ftL 9:21 AM 0.5ftH 4:21 PM 1.1ftL 11:15 PM 0.1ft |
| Wed, Sep 16 | H 7:15 AM 0.7ftL 9:45 AM 0.6ftH 4:09 PM 1.2ft |
| Thu, Sep 17 | L 12:06 AM 0.0ftH 8:36 AM 0.6ftL 10:03 AM 0.6ftH 4:09 PM 1.2ft |
| Fri, Sep 18 | L 12:57 AM 0.0ftH 4:33 PM 1.2ft |
| Sat, Sep 19 | L 1:51 AM 0.0ftH 5:03 PM 1.2ft |
| Sun, Sep 20 | L 2:45 AM 0.1ftH 5:39 PM 1.2ft |
| Mon, Sep 21 | L 3:42 AM 0.1ftH 6:21 PM 1.1ft |
| Tue, Sep 22 | L 4:33 AM 0.1ftH 1:48 PM 0.8ftL 2:18 PM 0.8ftH 7:09 PM 1.0ft |
Predicted for 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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