Boryeong tides
Today, Thursday, October 29, 2026 · local time (GMT+9) · Chungcheongnam-do, South Korea- 5:00 am21.9 ft
- 5:37 pm25.1 ft
- 11:09 am-0.1 ft
- 11:50 pm3.4 ft
- Tide now
- 2.6 ft ↑ rising · high 5:37 pm (25.1 ft)
- Coefficient
- 100 · big spring tides
- Range today
- 25.2 ft
Today there are high tides at 5:00 am (21.9 ft) and 5:37 pm (25.1 ft) and low tides at 11:09 am and 11:50 pm. Tide coefficient 100. Right now the tide is rising toward the high tide at 5:37 pm. In Boryeong the tide is semidiurnal: two high and two low tides a day, of similar height. The next spring tides: from October 27 to 29.
Today's high and low tides
- ▲ High tide 5:00 am 21.9 ft · coef. 100
- ▼ Low tide 11:09 am -0.1 ft
- ▲ Next high tide 5:37 pm 25.1 ft · coef. 97
- ▼ Low tide 11:50 pm 3.4 ft
↑ Rising The tide is rising. 5 h 5 min to high tide at 5:37 pm.
Tide coefficient 100 for the 5:00 am high tide and 97 for the 5:37 pm high tide. Big spring tides. The water rises and falls 25.2 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 (CD), the zero of that port's 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 | 6:53 am · 5:41 pm | High tide 5:00 am · 21.9 ft | Low tide 11:09 am · -0.1 ft | High tide 5:37 pm · 25.1 ft | Low tide 11:50 pm · 3.4 ft | Coef. 100 | 88% | Major periods 1:36 am · 2:08 pm | Medium |
| Fri 30 | 6:54 am · 5:40 pm | High tide 5:40 am · 20.9 ft | Low tide 11:51 am · 0.7 ft | High tide 6:22 pm · 23.9 ft | — | Coef. 92 | 80% | Major periods 2:41 am · 3:13 pm | High |
| Sat 31 | 6:55 am · 5:39 pm | Low tide 12:36 am · 4.8 ft | High tide 6:24 am · 19.6 ft | Low tide 12:37 pm · 2.2 ft | High tide 7:14 pm · 22.3 ft | Coef. 80 | 69% | Major periods 3:45 am · 4:16 pm | Medium |
| Sun 1 | 6:56 am · 5:38 pm | Low tide 1:31 am · 6.4 ft | High tide 7:17 am · 18.0 ft | Low tide 1:32 pm · 4.0 ft | High tide 8:16 pm · 20.5 ft | Coef. 65 | 58% | Major periods 4:45 am · 5:14 pm | Medium |
| Mon 2 | 6:57 am · 5:37 pm | Low tide 2:39 am · 7.7 ft | High tide 8:27 am · 16.6 ft | Low tide 2:44 pm · 5.8 ft | High tide 9:34 pm · 19.1 ft | Coef. 51 | Last quarter | Major periods 5:41 am · 6:07 pm | Medium |
| Tue 3 | 6:58 am · 5:36 pm | Low tide 4:06 am · 8.2 ft | High tide 10:02 am · 16.0 ft | Low tide 4:18 pm · 6.9 ft | High tide 11:02 pm · 18.6 ft | Coef. 45 | 36% | Major periods 6:32 am · 6:56 pm | Medium |
| Wed 4 | 6:59 am · 5:35 pm | Low tide 5:35 am · 7.5 ft | High tide 11:41 am · 16.8 ft | Low tide 5:51 pm · 6.8 ft | — | Coef. 48 | 26% | Major periods 7:19 am · 7:42 pm | Medium |
▲ high tide · ▼ low tide · heights above chart datum (CD). 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 27 to 28 (coefficient 103, 25.9 ft range). The smallest, from October 19 to 20 (coefficient 27, 7.7 ft).
Type of tide
In Boryeong 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 April 20 (25.8 ft) and the lowest, on April 19 (-0.6 ft).
Reference levels
- Highest astronomical tide (HAT)26.7 ft
- Mean higher high water (MHHW)21.2 ft
- Mean high water (MHW)20.3 ft
- Mean sea level (MSL)12.4 ft
- Mean low water (MLW)4.5 ft
- Mean lower low water (MLLW)3.7 ft
- Lowest astronomical tide (LAT)-1.4 ft
Heights above chart datum (CD), the zero of that port's nautical charts.
Questions about the tides in Boryeong
What time is high tide today in Boryeong?
High tide today is at 5:00 am (21.9 ft) and 5:37 pm (25.1 ft). Low tide is at 11:09 am and 11:50 pm.
What time is high tide tomorrow in Boryeong?
On Friday, October 30, high tide at 5:40 am and 6:22 pm and low tide at 11:51 am.
What is today's tide coefficient?
100: 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 October 27 to 29, after the new or full moon, with the moon near perigee, so they will be bigger than usual.
How many tides a day are there in Boryeong?
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 chart datum (CD), the zero of that port's 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 Boryeong today
Tides near Boryeong
Each place with its own tide station; next to it, the time of its first high tide today.
Learn more
Boryeong has no station of its own, so we use the tide at Boryeong (KHOA), 7.4 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: Korea Hydrographic and Oceanographic Agency (해양수산부 국립해양조사원), harmonic constants of the TideBED reference ports (예측조위(타이드베드) 기준항 조화상수, 2025-08-12), station Boryeong (보령, DT_0025), https://www.data.go.kr/data/15145395/fileData.do. Free, no restrictions on use (이용허락범위 제한 없음). Modified by TidePlanet: M2, S2, K1 and O1 from KHOA, the other constituents of those bands inferred from them.