Grand Bay Tides Today
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Grand Bay runs a mean tidal range of about 1.2 ft. This month the highest water, 1.7 ft, comes on the morning of Oct 30, and the lowest, a -0.4 ft minus tide, on the afternoon of Oct 29.
| High tide | 2:56 AM | 1.7 ft |
| Low tide | 3:07 PM | -0.3 ft |
Today on the water at Grand Bay
Today at Grand Bay: high tide at 2:56 AM (1.7 ft), low tide at 3:07 PM (-0.3 ft). Sunrise is at 7:09 AM and sunset at 6:13 PM.
Forecast: National Weather Service point forecast for this location.
Where Grand Bay is
Grand Bay sits at 29.3866° N, 89.3801° W on the northern Gulf of Mexico, about 3 mi north of Boothville, LA. The station here is a historical NOAA reference station: a gauge measured the tide at this spot from 1985 until 2009, and NOAA still publishes harmonic predictions from that record. There is no live reading here today. The closest gauge measuring live water level is Pilottown (NOAA 8760721), 16.1 mi away, and high and low water here run on average about 59 min later than there. The nearest weather station is Pilottown, LA, a shore station reporting wind and, at most sites, water temperature, 16.1 mi away.
The tide at Grand Bay
Grand Bay has a diurnal tide: usually one high and one low a day, with the daily rhythm shifting about 50 minutes later each day and fading near the moon's equatorial crossing. This month's predictions average 1.1 high tides a day here. The mean range from lower low to higher high is 1.3 ft, a small tide. For the water around it: Northern Gulf tides are diurnal, one high and one low most days with ranges of 1 to 2 ft, so wind and river stage move the water as much as the moon.
Datum and source
Heights on this page are feet above mean lower low water (MLLW), the zero NOAA's nautical charts use for soundings. A predicted 0.0 ft low is the average of the lower low each day; a minus tide is water below chart datum, and a 2 ft high means 2 ft more water than the chart shows. NOAA fixes MLLW at Grand Bay from the 2012-2016 National Tidal Datum Epoch; mean higher high water is 1.3 ft above it and mean sea level 0.7 ft. These datums are controlled from NOAA's Grand Isle, LA gauge. Source: NOAA CO-OPS station 8760889, established 1985, gauge removed 2009. The tide times and heights are NOAA's official harmonic predictions for this station; TidalMap republishes them daily and does not alter them.
Tide stations near Grand Bay
- Jack Bay: 2.5 mi, tides about 12 min later
- Breton Islands: 14.5 mi, tides about 40 min earlier
- Pilottown: 16.1 mi, tides about 59 min earlier
- Bastian Island: 18.4 mi, tides about 56 min earlier
- Bay Gardene: 20.5 mi, tides about 76 min later
TidalMapMonthly tide calendar
🌊 Biggest flood tides at Grand Bay this month: Oct 1, Oct 2, Oct 3, Oct 4, Oct 27, Oct 29, Oct 30, Oct 31. These spring highs push water up into the grass and over the oyster rock; prime for poling into flooded marsh for tailing reds.
🔻 Negative (minus) low tides at Grand Bay this month: Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 13, Oct 14, Oct 15, Oct 16, Oct 17, Oct 26, Oct 27 …. These drain the flats and expose the oyster rock, prime for sight-fishing and clamming.
Best fishing times (solunar)
Major and minor solunar windows for Grand Bay, peak feeding activity is around the moon overhead/underfoot (majors) and moonrise/moonset (minors). Score is the day's activity coefficient (0–100).
| Day | Major windows | Minor windows | Score |
|---|---|---|---|
| Today 🌖 | 4:38–6:38 AM 5:03–7:03 PM | 10:26–12:26 AM 11:56–1:56 PM | 55 |
| Sun Nov 1 🌗 | 5:38–7:38 AM 6:03–8:03 PM | — 12:43–2:43 PM | 42 |
| Mon Nov 2 🌗 | 6:34–8:34 AM 6:59–8:59 PM | 11:36–1:36 AM 1:23–3:23 PM | 33 |
| Tue Nov 3 🌗 | 7:25–9:25 AM 7:50–9:50 PM | 12:44–2:44 AM 1:58–3:58 PM | 47 |
| Wed Nov 4 🌗 | 8:13–10:13 AM 8:38–10:38 PM | 1:48–3:48 AM 2:30–4:30 PM | 61 |
| Thu Nov 5 🌘 | 8:59–10:59 AM 9:24–11:24 PM | 2:50–4:50 AM 3:01–5:01 PM | 73 |
| Fri Nov 6 🌘 | 9:44–11:44 AM 10:09–12:09 AM | 3:50–5:50 AM 3:31–5:31 PM | 83 |
Predictions & observations: NOAA CO-OPS station 8760889. Solunar windows computed from the moon's position for this location. Times shown in the station's local time. Not for navigation.
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