Cajueiro da Praia tides
Today, Thursday, October 29, 2026 · local time (GMT-3) · Piauí, Brazil- 5:30 am8.0 ft
- 5:45 pm9.0 ft
- 11:33 am0.7 ft
- Tide now
- 4.9 ft ↑ rising · high 5:30 am (8.0 ft)
- Coefficient
- 83 · average coefficient
- Range today
- 8.3 ft
Today there are high tides at 5:30 am (8.0 ft) and 5:45 pm (9.0 ft) and low tide at 11:33 am. Tide coefficient 83. Right now the tide is rising toward the high tide at 5:30 am. In Cajueiro da Praia the tide is semidiurnal: two high and two low tides a day, of similar height. The next spring tides: from November 9 to 11.
Today's high and low tides
- ▲ Next high tide 5:30 am 8.0 ft · coef. 83
- ▼ Low tide 11:33 am 0.7 ft
- ▲ High tide 5:45 pm 9.0 ft · coef. 78
↑ Rising The tide is rising. 2 h 40 min to high tide at 5:30 am.
Tide coefficient 83 for the 5:30 am high tide and 78 for the 5:45 pm high tide. Average coefficient. The water rises and falls 8.3 ft between the highest high and the lowest low: an average range for this place. 70 is an average tide here; 90 and above means spring tides; below 45, neap tides. What is the tide coefficient?
Heights above MLWS. Astronomical prediction: wind and air pressure can raise or lower the water by a few inches, and more in a storm. Not for navigation.
Tides for the next 7 days
| Day | Sun | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Thu 29 | 5:23 am · 5:35 pm | High tide 5:30 am · 8.0 ft | Low tide 11:33 am · 0.7 ft | High tide 5:45 pm · 9.0 ft | — | Coef. 83 | 84% | Major periods 1:18 am · 1:50 pm | Medium |
| Fri 30 | 5:23 am · 5:35 pm | Low tide 12:22 am · 0.2 ft | High tide 6:24 am · 7.5 ft | Low tide 12:23 pm · 1.3 ft | High tide 6:41 pm · 8.4 ft | Coef. 73 | 75% | Major periods 2:23 am · 2:54 pm | Low |
| Sat 31 | 5:23 am · 5:35 pm | Low tide 1:17 am · 0.8 ft | High tide 7:30 am · 7.0 ft | Low tide 1:21 pm · 2.0 ft | High tide 7:48 pm · 7.8 ft | Coef. 61 | 64% | Major periods 3:25 am · 3:55 pm | Medium |
| Sun 1 | 5:22 am · 5:35 pm | Low tide 2:22 am · 1.4 ft | High tide 8:47 am · 6.7 ft | Low tide 2:33 pm · 2.5 ft | High tide 9:06 pm · 7.5 ft | Coef. 51 | Last quarter | Major periods 4:23 am · 4:51 pm | Medium |
| Mon 2 | 5:22 am · 5:35 pm | Low tide 3:42 am · 1.8 ft | High tide 10:07 am · 6.8 ft | Low tide 4:03 pm · 2.6 ft | High tide 10:27 pm · 7.5 ft | Coef. 50 | 42% | Major periods 5:17 am · 5:42 pm | Medium |
| Tue 3 | 5:22 am · 5:36 pm | Low tide 5:04 am · 1.7 ft | High tide 11:17 am · 7.3 ft | Low tide 5:30 pm · 2.2 ft | High tide 11:40 pm · 7.7 ft | Coef. 58 | 31% | Major periods 6:06 am · 6:29 pm | Low |
| Wed 4 | 5:22 am · 5:36 pm | Low tide 6:10 am · 1.3 ft | High tide 12:16 pm · 7.9 ft | Low tide 6:34 pm · 1.6 ft | — | Coef. 63 | 22% | Major periods 6:52 am · 7:14 pm | Low |
▲ high tide · ▼ low tide · heights above MLWS. Major periods: start time; they last 2 hours. Activity: based on the moon phase and the solunar periods.
Tide coefficient and range in October
The biggest tides of the month came from October 10 to 11 (coefficient 103, 10.9 ft range). The smallest, on October 18 (coefficient 30, 3.8 ft).
Type of tide
In Cajueiro da Praia the tide is semidiurnal: two high and two low tides a day, of similar height. Types of tides
2026 extremes: the highest tide of the year is on August 14 (10.8 ft) and the lowest, on February 2 (-1.4 ft).
Reference levels
- Highest astronomical tide (HAT)11.0 ft
- Mean higher high water (MHHW)8.3 ft
- Mean high water (MHW)8.1 ft
- Mean sea level (MSL)4.6 ft
- Mean low water (MLW)0.9 ft
- Mean lower low water (MLLW)0.7 ft
- Lowest astronomical tide (LAT)-2.0 ft
Heights above MLWS.
Questions about the tides in Cajueiro da Praia
What time is high tide today in Cajueiro da Praia?
High tide today is at 5:30 am (8.0 ft) and 5:45 pm (9.0 ft). Low tide is at 11:33 am.
What time is high tide tomorrow in Cajueiro da Praia?
On Friday, October 30, high tide at 6:24 am and 6:41 pm and low tide at 12:22 am and 12:23 pm.
What is today's tide coefficient?
83: average coefficient. 70 is an average tide here; 90 and above means spring tides; below 45, neap tides.
When are the next spring tides?
From November 9 to 11, after the new or full moon.
How many tides a day are there in Cajueiro da Praia?
The tide is semidiurnal: two high and two low tides a day, of similar height. Each high tide comes about 50 minutes later than the day before.
What are the heights measured from?
From MLWS. That is why a low tide can be negative: that day the water drops below that zero.
Can I use these tides for navigation?
No. They are astronomical predictions for planning fishing and outings; for navigation use official publications and nautical charts.
More about Cajueiro da Praia today
Learn more
Cajueiro da Praia has no station of its own, so we use the tide at Luís Correia (TICON-4), 24 mi away. On the open coast the difference is usually a few minutes and inches; inside estuaries, rivers and enclosed bays it can be much larger. Station data attribution: Slackwater database (https://github.com/openwatersio/slackwater-database). Source: Hart-Davis, M., Dettmering, D., Seitz, F. (2025), TICON-4: TIdal CONstants based on GESLA-4 sea-level records, SEANOE, https://doi.org/10.17882/109129. Licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Modified: see https://github.com/openwatersio/slackwater-database#modifications-to-source-data