Hạ Long tides
Today, Thursday, October 29, 2026 · local time (GMT+7) · Quảng Ninh, Vietnam- 5:05 am12.5 ft
- 6:47 pm1.7 ft
- Tide now
- 1.7 ft ↑ rising · high 6:11 am (13.1 ft)
- Coefficient
- 103 · big spring tides
- Range today
- 10.8 ft
Today there is high tide at 5:05 am (12.5 ft) and low tide at 6:47 pm. Tide coefficient 103. Right now the tide is rising toward the high tide at 6:11 am. In Hạ Long the tide is diurnal: one high and one low tide a day most days. The next spring tides: from November 10 to 12.
Today's high and low tides
- ▲ High tide 5:05 am 12.5 ft · coef. 103
- ▼ Low tide 6:47 pm 1.7 ft
↑ Rising The tide is rising. 11 h 1 min to high tide at 6:11 am.
Tide coefficient 103 for the 5:05 am high tide. Big spring tides. The water rises and falls 10.8 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 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|
| Today, Thu 29 | 5:53 am · 5:18 pm | High tide 5:05 am · 12.5 ft | Low tide 6:47 pm · 1.7 ft | Coef. 103 | 87% | Major periods 12:58 am · 1:30 pm | Medium |
| Fri 30 | 5:53 am · 5:17 pm | High tide 6:11 am · 13.1 ft | Low tide 7:38 pm · 1.2 ft | Coef. 115 | 79% | Major periods 2:02 am · 2:35 pm | Medium |
| Sat 31 | 5:54 am · 5:17 pm | High tide 7:22 am · 13.3 ft | Low tide 8:29 pm · 1.1 ft | Coef. 119 | 68% | Major periods 3:06 am · 3:37 pm | Medium |
| Sun 1 | 5:54 am · 5:16 pm | High tide 8:35 am · 13.2 ft | Low tide 9:21 pm · 1.4 ft | Coef. 117 | 57% | Major periods 4:06 am · 4:35 pm | Medium |
| Mon 2 | 5:55 am · 5:16 pm | High tide 9:49 am · 12.8 ft | Low tide 10:13 pm · 2.1 ft | Coef. 109 | Last quarter | Major periods 5:02 am · 5:28 pm | Medium |
| Tue 3 | 5:55 am · 5:15 pm | High tide 10:58 am · 12.1 ft | Low tide 11:06 pm · 3.1 ft | Coef. 96 | 35% | Major periods 5:53 am · 6:16 pm | Medium |
| Wed 4 | 5:56 am · 5:15 pm | High tide 12:04 pm · 11.1 ft | — | Coef. 78 | 25% | Major periods 6:40 am · 7:02 pm | Low |
▲ 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 come on October 31 (coefficient 119, 12.2 ft range). The smallest, on October 25 (coefficient 20, 1.0 ft).
Type of tide
In Hạ Long the tide is diurnal: one high and one low tide a day most days. Types of tides
2026 extremes: the highest tide of the year is on November 28 (13.8 ft) and the lowest, on June 17 (-0.1 ft).
Reference levels
- Highest astronomical tide (HAT)13.8 ft
- Mean higher high water (MHHW)10.1 ft
- Mean high water (MHW)9.9 ft
- Mean sea level (MSL)6.8 ft
- Mean low water (MLW)3.7 ft
- Mean lower low water (MLLW)3.5 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 Hạ Long
What time is high tide today in Hạ Long?
High tide today is at 5:05 am (12.5 ft). Low tide is at 6:47 pm.
What time is high tide tomorrow in Hạ Long?
On Friday, October 30, high tide at 6:11 am and low tide at 7:38 pm.
What is today's tide coefficient?
103: 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 10 to 12, after the new or full moon.
How many tides a day are there in Hạ Long?
The tide is diurnal: one high and one low tide a day most days. 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 Hạ Long today
Tides near Hạ Long
- Cẩm Phả ▲ 5:27 am
- Thị Trấn Cái Rồng ▲ 5:37 am
- Thị Trấn Đầm Hà ▲ 6:08 am
- Cô Tô ▲ 5:44 am
- Jiangping ▲ 7:08 am
Each place with its own tide station; next to it, the time of its first high tide today.
Learn more
Hạ Long has no station of its own, so we use the tide at Hòn Dáu (TICON-4), 26 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