Ganghwa-gun tides
Today, Thursday, October 29, 2026 · local time (GMT+9) · Incheon, South Korea- 7:55 am19.5 ft
- 8:28 pm22.5 ft
- 2:00 am1.6 ft
- 2:02 pm-0.1 ft
- Tide now
- 3.0 ft ↑ rising · high 8:28 pm (22.5 ft)
- Coefficient
- 99 · spring tides
- Range today
- 22.6 ft
Today there are high tides at 7:55 am (19.5 ft) and 8:28 pm (22.5 ft) and low tides at 2:00 am and 2:02 pm. Tide coefficient 99. Right now the tide is rising toward the high tide at 8:28 pm. In Ganghwa-gun 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
- ▼ Low tide 2:00 am 1.6 ft
- ▲ High tide 7:55 am 19.5 ft · coef. 99
- ▼ Low tide 2:02 pm -0.1 ft
- ▲ Next high tide 8:28 pm 22.5 ft · coef. 97
↑ Rising The tide is rising. 4 h 53 min to high tide at 8:28 pm.
Tide coefficient 99 for the 7:55 am high tide and 97 for the 8:28 pm high tide. Spring tides. The water rises and falls 22.6 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 | 6:56 am · 5:39 pm | Low tide 2:00 am · 1.6 ft | High tide 7:55 am · 19.5 ft | Low tide 2:02 pm · -0.1 ft | High tide 8:28 pm · 22.5 ft | Coef. 99 | 88% | Major periods 1:37 am · 2:09 pm | Medium |
| Fri 30 | 6:57 am · 5:38 pm | Low tide 2:43 am · 2.3 ft | High tide 8:37 am · 18.8 ft | Low tide 2:44 pm · 0.5 ft | High tide 9:13 pm · 21.7 ft | Coef. 93 | 80% | Major periods 2:41 am · 3:14 pm | High |
| Sat 31 | 6:58 am · 5:37 pm | Low tide 3:30 am · 3.3 ft | High tide 9:22 am · 17.7 ft | Low tide 3:31 pm · 1.7 ft | High tide 10:04 pm · 20.4 ft | Coef. 83 | 69% | Major periods 3:45 am · 4:16 pm | Medium |
| Sun 1 | 6:59 am · 5:36 pm | Low tide 4:23 am · 4.6 ft | High tide 10:14 am · 16.5 ft | Low tide 4:25 pm · 3.1 ft | High tide 11:03 pm · 19.0 ft | Coef. 70 | 58% | Major periods 4:46 am · 5:14 pm | Medium |
| Mon 2 | 7:00 am · 5:35 pm | Low tide 5:27 am · 5.7 ft | High tide 11:20 am · 15.3 ft | Low tide 5:32 pm · 4.6 ft | — | Coef. 57 | Last quarter | Major periods 5:41 am · 6:07 pm | Medium |
| Tue 3 | 7:01 am · 5:34 pm | High tide 12:15 am · 17.7 ft | Low tide 6:46 am · 6.4 ft | High tide 12:45 pm · 14.7 ft | Low tide 6:57 pm · 5.7 ft | Coef. 52 | 36% | Major periods 6:32 am · 6:56 pm | Medium |
| Wed 4 | 7:02 am · 5:33 pm | High tide 1:37 am · 17.0 ft | Low tide 8:09 am · 6.1 ft | High tide 2:17 pm · 15.1 ft | Low tide 8:27 pm · 5.8 ft | Coef. 49 | 26% | Major periods 7:20 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 29 (coefficient 100, 22.8 ft range). The smallest, from October 20 to 21 (coefficient 30, 7.5 ft).
Type of tide
In Ganghwa-gun 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 May 19 (23.1 ft) and the lowest, on April 20 (-0.4 ft).
Reference levels
- Highest astronomical tide (HAT)23.8 ft
- Mean higher high water (MHHW)19.1 ft
- Mean high water (MHW)18.2 ft
- Mean sea level (MSL)11.0 ft
- Mean low water (MLW)3.7 ft
- Mean lower low water (MLLW)3.3 ft
- Lowest astronomical tide (LAT)-1.2 ft
Heights above chart datum (CD), the zero of that port's nautical charts.
Questions about the tides in Ganghwa-gun
What time is high tide today in Ganghwa-gun?
High tide today is at 7:55 am (19.5 ft) and 8:28 pm (22.5 ft). Low tide is at 2:00 am and 2:02 pm.
What time is high tide tomorrow in Ganghwa-gun?
On Friday, October 30, high tide at 8:37 am and 9:13 pm and low tide at 2:43 am and 2:44 pm.
What is today's tide coefficient?
99: 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 Ganghwa-gun?
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 Ganghwa-gun today
Tides near Ganghwa-gun
Each place with its own tide station; next to it, the time of its first high tide today.
Learn more
Tides from the Ganghwa Bridge station (KHOA), 2.3 mi from Ganghwa-gun. Times and heights are its predictions. 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 Ganghwa Bridge (강화대교, DT_0032), 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.