Old Harbour Bay tides
Today, Thursday, October 29, 2026 · local time (EST) · Saint Catherine Parish, Jamaica- 1:06 pm1.3 ft
- 4:06 am0.4 ft
- Tide now
- 0.5 ft ↓ falling · low 4:06 am (0.4 ft)
- Coefficient
- 107 · big spring tides
- Range today
- 1.0 ft
Today there is high tide at 1:06 pm (1.3 ft) and low tide at 4:06 am. Tide coefficient 107. Right now the tide is falling toward the low tide at 4:06 am. In Old Harbour Bay the tide is mixed, mainly diurnal: on many days there is only one high and one low tide. The next spring tides: from November 9 to 11.
Today's high and low tides
- ▼ Next low tide 4:06 am 0.4 ft
- ▲ High tide 1:06 pm 1.3 ft · coef. 107
↓ Falling The tide is falling. 2 h 35 min to low tide at 4:06 am.
Tide coefficient 107 for the 1:06 pm high tide. Big spring tides. The water rises and falls 1.0 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 chart datum: the lowest astronomical tide (LAT), the zero of nautical charts in Europe. 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 | 6:06 am · 5:38 pm | Low tide 4:06 am · 0.4 ft | High tide 1:06 pm · 1.3 ft | — | — | Coef. 107 | 83% | Major periods 1:47 am · 2:20 pm | Medium |
| Fri 30 | 6:07 am · 5:37 pm | Low tide 5:11 am · 0.4 ft | High tide 2:24 pm · 1.3 ft | Low tide 10:43 pm · 0.5 ft | — | Coef. 102 | 74% | Major periods 2:52 am · 3:24 pm | Medium |
| Sat 31 | 6:07 am · 5:37 pm | High tide 3:38 am · 0.6 ft | Low tide 6:38 am · 0.5 ft | High tide 3:33 pm · 1.3 ft | Low tide 11:19 pm · 0.5 ft | Coef. 97 | 63% | Major periods 3:54 am · 4:24 pm | Medium |
| Sun 1 | 6:08 am · 5:36 pm | High tide 4:46 am · 0.7 ft | Low tide 8:33 am · 0.6 ft | High tide 4:31 pm · 1.3 ft | Low tide 11:52 pm · 0.5 ft | Coef. 86 | Last quarter | Major periods 4:52 am · 5:19 pm | Medium |
| Mon 2 | 6:08 am · 5:36 pm | High tide 5:39 am · 0.8 ft | Low tide 10:20 am · 0.6 ft | High tide 5:20 pm · 1.3 ft | — | Coef. 71 | 41% | Major periods 5:45 am · 6:10 pm | Medium |
| Tue 3 | 6:08 am · 5:35 pm | Low tide 12:22 am · 0.5 ft | High tide 6:26 am · 1.0 ft | Low tide 11:43 am · 0.7 ft | High tide 6:03 pm · 1.2 ft | Coef. 52 | 30% | Major periods 6:34 am · 6:57 pm | Medium |
| Wed 4 | 6:09 am · 5:35 pm | Low tide 12:48 am · 0.5 ft | High tide 7:10 am · 1.1 ft | Low tide 12:58 pm · 0.7 ft | High tide 6:40 pm · 1.1 ft | Coef. 38 | 21% | Major periods 7:19 am · 7:42 pm | Medium |
▲ high tide · ▼ low tide · heights above chart datum (LAT). 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 28 to 29 (coefficient 107, 1.0 ft range). The smallest, on October 8 (coefficient 27, 0.6 ft).
Type of tide
In Old Harbour Bay the tide is mixed, mainly diurnal: on many days there is only one high and one low tide. Types of tides
2026 extremes: the highest tide of the year is on September 7 (1.6 ft) and the lowest, on December 23 (0.0 ft).
Reference levels
- Highest astronomical tide (HAT)1.7 ft
- Mean higher high water (MHHW)1.2 ft
- Mean high water (MHW)0.9 ft
- Mean sea level (MSL)0.7 ft
- Mean low water (MLW)0.6 ft
- Mean lower low water (MLLW)0.4 ft
- Lowest astronomical tide (LAT)0.0 ft
Heights above chart datum: the lowest astronomical tide (LAT), the zero of nautical charts in Europe.
Questions about the tides in Old Harbour Bay
What time is high tide today in Old Harbour Bay?
High tide today is at 1:06 pm (1.3 ft). Low tide is at 4:06 am.
What time is high tide tomorrow in Old Harbour Bay?
On Friday, October 30, high tide at 2:24 pm and low tide at 5:11 am and 10:43 pm.
What is today's tide coefficient?
107: big spring tides. 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 Harbour Bay?
The tide is mixed, mainly diurnal: on many days there is only one high and one low tide. Each high tide comes about 50 minutes later than the day before.
What are the heights measured from?
From chart datum: the lowest astronomical tide (LAT), the zero of nautical charts in Europe. 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 Harbour Bay today
Tides near Old Harbour Bay
- Alligator Pond ▲ 12:42 pm
- Ocho Rios ▲ 2:32 pm
- Yallahs ▲ 2:04 pm
- Treasure Beach ▲ 12:36 pm
- Black River ▲ 3:05 pm
- Savanna-la-Mar ▲ 7:02 pm
Each place with its own tide station; next to it, the time of its first high tide today.
Learn more
Old Harbour Bay has no station of its own, so we use the tide at Port Royal (TICON-4), 16 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