High tide occurs approximately 05:10 after the Moon passes over the local meridian of São Luís / Itaqui.
Tidal predictions and solunar activity are mathematically estimated for recreational and tide watch calibration purposes only. This constant-based method is designed for semidiurnal tidal regimes (two high tides a day). Regions with diurnal or mixed tides will experience significant deviations. During lunar quarters (First and Third Quarter), natural variations may shift times by 1.5 to 2 hours compared to official tables.Strictly not for maritime navigation or safety-critical planning.
7-Day Tide & Activity Forecast
| Date | Moon Phase | Activity | High Tides (Estimated) |
|---|---|---|---|
| Today | Waning gibbous |
|
09:47 & 22:17 |
| Sun, Nov 1 | Last quarter |
|
10:45 & 23:12 |
| Mon, Nov 2 | Last quarter |
|
11:38 & -- |
| Tue, Nov 3 | Waning crescent |
|
00:03 & 12:28 |
| Wed, Nov 4 | Waning crescent |
|
00:51 & 13:14 |
| Thu, Nov 5 | Waning crescent |
|
01:36 & 13:58 |
| Fri, Nov 6 | Waning crescent |
|
02:20 & 14:42 |
Today's Solunar Activity & Feeding Curve
24-hour continuous biological activity score with estimated high tide alignments.
Official Port Data
This port relies on official hydrographic data and does not require community calibration.