Today's high and low tide times for Grand Isle, LA, plus a 7-day tide table. Astronomical predictions from the nearest harmonic station — free and updated daily.
In Grand Isle, LA, the next high tide is at 12:47 AM (0.41 m) and the next low tide is at 9:31 AM (0.10 m), based on harmonic predictions for EAST POINT, GRAND ISLE.
All high and low tides for Grand Isle today, in local time (America/Chicago). Heights are metres above chart datum.
High (H) and low (L) tide times and heights for the next seven days at Grand Isle.
| Date | Tides (local time · height) |
|---|---|
| Wed, Jul 15 | L 9:31 AM 0.10 mH 12:47 AM 0.41 m |
| Thu, Jul 16 | L 10:19 AM 0.14 m |
| Fri, Jul 17 | H 1:53 AM 0.38 mL 11:04 AM 0.19 m |
| Sat, Jul 18 | H 3:32 AM 0.33 mL 11:37 AM 0.24 mH 6:11 PM 0.26 mL 8:34 PM 0.25 m |
| Sun, Jul 19 | H 6:08 AM 0.30 mL 9:28 AM 0.28 mL 2:13 PM 0.29 mH 2:23 PM 0.29 mH 4:41 PM 0.29 m |
| Mon, Jul 20 | L 12:58 AM 0.22 mH 2:38 PM 0.34 m |
| Tue, Jul 21 | L 2:40 AM 0.17 mH 3:29 PM 0.38 m |
Predicted from EAST POINT, GRAND ISLE, 3.9 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 Grand Isle.
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