Old Mystic tides
Today, Thursday, October 29, 2026 · local time (EDT) · Connecticut, United States- 11:54 am3.3 ft
- 5:58 am0.2 ft
- 6:54 pm0.0 ft
- Tide now
- 0.2 ft ↑ rising · high 11:54 am (3.3 ft)
- Coefficient
- 84 · average coefficient
- Range today
- 3.3 ft
Today there is high tide at 11:54 am (3.3 ft) and low tides at 5:58 am and 6:54 pm. Tide coefficient 84. Right now the tide is rising toward the high tide at 11:54 am. In Old Mystic the tide is mixed: two high and two low tides a day, but of quite different heights. The next spring tides: from November 9 to 11.
Today's high and low tides
- ▼ Low tide 5:58 am 0.2 ft
- ▲ Next high tide 11:54 am 3.3 ft · coef. 84
- ▼ Low tide 6:54 pm 0.0 ft
↑ Rising The tide is rising. 5 h 47 min to high tide at 11:54 am.
Tide coefficient 84 for the 11:54 am high tide. Average coefficient. The water rises and falls 3.3 ft between the highest high and the lowest low: a large 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 mean lower low water (MLLW), the zero of US nautical charts. 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 | 7:16 am · 5:47 pm | Low tide 5:58 am · 0.2 ft | High tide 11:54 am · 3.3 ft | Low tide 6:54 pm · 0.0 ft | — | Coef. 84 | 84% | Major periods 2:26 am · 2:58 pm | Medium |
| Fri 30 | 7:17 am · 5:45 pm | High tide 12:21 am · 2.5 ft | Low tide 6:57 am · 0.3 ft | High tide 12:53 pm · 3.1 ft | Low tide 7:52 pm · 0.2 ft | Coef. 80 | 74% | Major periods 3:31 am · 4:02 pm | Medium |
| Sat 31 | 7:18 am · 5:44 pm | High tide 1:21 am · 2.5 ft | Low tide 8:02 am · 0.4 ft | High tide 1:58 pm · 2.9 ft | Low tide 8:52 pm · 0.3 ft | Coef. 72 | 63% | Major periods 4:33 am · 5:02 pm | Medium |
| Sun 1 | 6:19 am · 4:43 pm | High tide 1:27 am · 2.4 ft | Low tide 8:10 am · 0.4 ft | High tide 2:06 pm · 2.8 ft | Low tide 8:52 pm · 0.3 ft | Coef. 66 | Last quarter | Major periods 4:31 am · 4:58 pm | Medium |
| Mon 2 | 6:21 am · 4:42 pm | High tide 2:36 am · 2.5 ft | Low tide 9:18 am · 0.4 ft | High tide 3:13 pm · 2.6 ft | Low tide 9:51 pm · 0.3 ft | Coef. 63 | 41% | Major periods 5:24 am · 5:49 pm | Medium |
| Tue 3 | 6:22 am · 4:40 pm | High tide 3:43 am · 2.6 ft | Low tide 10:22 am · 0.3 ft | High tide 4:17 pm · 2.6 ft | Low tide 10:46 pm · 0.3 ft | Coef. 66 | 30% | Major periods 6:12 am · 6:36 pm | Medium |
| Wed 4 | 6:23 am · 4:39 pm | High tide 4:44 am · 2.7 ft | Low tide 11:23 am · 0.2 ft | High tide 5:14 pm · 2.6 ft | Low tide 11:39 pm · 0.3 ft | Coef. 70 | 21% | Major periods 6:58 am · 7:20 pm | Medium |
▲ high tide · ▼ low tide · heights above MLLW. 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 26 to 27 (coefficient 94, 3.7 ft range). The smallest, on October 18 (coefficient 38, 1.5 ft).
Type of tide
In Old Mystic the tide is mixed: two high and two low tides a day, but of quite different heights. Types of tides
2026 extremes: the highest tide of the year is on June 14 (3.7 ft) and the lowest, on January 2 (-0.6 ft).
Reference levels
- Highest astronomical tide (HAT)3.8 ft
- Mean higher high water (MHHW)3.0 ft
- Mean high water (MHW)2.7 ft
- Mean sea level (MSL)1.5 ft
- Mean low water (MLW)0.2 ft
- Mean lower low water (MLLW)0.0 ft
- Lowest astronomical tide (LAT)-0.8 ft
Heights above mean lower low water (MLLW), the zero of US nautical charts.
Questions about the tides in Old Mystic
What time is high tide today in Old Mystic?
High tide today is at 11:54 am (3.3 ft). Low tide is at 5:58 am and 6:54 pm.
What time is high tide tomorrow in Old Mystic?
On Friday, October 30, high tide at 12:21 am and 12:53 pm and low tide at 6:57 am and 7:52 pm.
What is today's tide coefficient?
84: 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 Old Mystic?
The tide is mixed: two high and two low tides a day, but of quite different heights. Each high tide comes about 50 minutes later than the day before.
What are the heights measured from?
From mean lower low water (MLLW), the zero of US nautical charts. 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 Old Mystic today
Tides near Old Mystic
- Stonington ▲ 11:23 am
- Long Hill ▲ 12:11 pm
- Pawcatuck ▲ 11:50 am
- Gales Ferry ▲ 12:25 pm
- Misquamicut State Beach ▲ 11:09 am
- Fishers Island ▲ 12:22 pm
Each place with its own tide station; next to it, the time of its first high tide today.
Learn more
Old Mystic has no station of its own, so we use the tide at West Mystic (NOAA), 3.4 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)