's-Gravenzande tides
Today, Thursday, October 29, 2026 · local time (CET) · South Holland, Netherlands- 4:38 am8.0 ft
- 4:58 pm8.3 ft
- 9:29 am1.8 ft
- 9:55 pm1.7 ft
- Tide now
- 4.6 ft ↑ rising · high 4:38 am (8.0 ft)
- Coefficient
- 75 · average coefficient
- Range today
- 6.6 ft
Today there are high tides at 4:38 am (8.0 ft) and 4:58 pm (8.3 ft) and low tides at 9:29 am and 9:55 pm. Tide coefficient 75. Right now the tide is rising toward the high tide at 4:38 am. In 's-Gravenzande the tide is semidiurnal: two high and two low tides a day, of similar height. The next spring tides: from November 9 to 11.
Today's high and low tides
- ▲ Next high tide 4:38 am 8.0 ft · coef. 75
- ▼ Low tide 9:29 am 1.8 ft
- ▲ High tide 4:58 pm 8.3 ft · coef. 74
- ▼ Low tide 9:55 pm 1.7 ft
↑ Rising The tide is rising. 1 h 52 min to high tide at 4:38 am.
Tide coefficient 75 for the 4:38 am high tide and 74 for the 4:58 pm high tide. Average coefficient. The water rises and falls 6.6 ft between the highest high and the lowest low: an average 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 | 7:33 am · 5:21 pm | High tide 4:38 am · 8.0 ft | Low tide 9:29 am · 1.8 ft | High tide 4:58 pm · 8.3 ft | Low tide 9:55 pm · 1.7 ft | Coef. 75 | 85% | Major periods 2:08 am · 2:40 pm | Medium |
| Fri 30 | 7:34 am · 5:19 pm | High tide 5:22 am · 7.7 ft | Low tide 10:11 am · 1.6 ft | High tide 5:44 pm · 8.3 ft | Low tide 10:44 pm · 2.0 ft | Coef. 73 | 76% | Major periods 3:13 am · 3:44 pm | Medium |
| Sat 31 | 7:36 am · 5:17 pm | High tide 6:09 am · 7.3 ft | Low tide 11:00 am · 1.5 ft | High tide 6:34 pm · 8.2 ft | — | Coef. 71 | 66% | Major periods 4:16 am · 4:46 pm | Medium |
| Sun 1 | 7:38 am · 5:15 pm | Low tide 2:52 am · 2.2 ft | High tide 7:00 am · 6.9 ft | Low tide 11:53 am · 1.5 ft | High tide 7:30 pm · 7.8 ft | Coef. 67 | Last quarter | Major periods 5:14 am · 5:42 pm | Medium |
| Mon 2 | 7:40 am · 5:13 pm | Low tide 3:36 am · 2.3 ft | High tide 8:00 am · 6.4 ft | Low tide 12:53 pm · 1.7 ft | High tide 8:38 pm · 7.4 ft | Coef. 62 | 43% | Major periods 6:08 am · 6:34 pm | Medium |
| Tue 3 | 7:42 am · 5:11 pm | Low tide 4:25 am · 2.3 ft | High tide 9:17 am · 6.0 ft | Low tide 4:41 pm · 1.7 ft | High tide 10:05 pm · 7.1 ft | Coef. 58 | 33% | Major periods 6:58 am · 7:21 pm | Medium |
| Wed 4 | 7:43 am · 5:10 pm | Low tide 5:20 am · 2.3 ft | High tide 10:46 am · 6.0 ft | Low tide 5:44 pm · 1.4 ft | High tide 11:36 pm · 7.3 ft | Coef. 64 | 23% | Major periods 7:44 am · 8:07 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 9 to 11 (coefficient 83, 7.2 ft range). The smallest, from October 20 to 21 (coefficient 49, 4.3 ft).
Type of tide
In 's-Gravenzande 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 December 27 (8.5 ft) and the lowest, on February 23 (0.1 ft).
Reference levels
- Highest astronomical tide (HAT)8.8 ft
- Mean higher high water (MHHW)7.4 ft
- Mean high water (MHW)5.5 ft
- Mean sea level (MSL)3.8 ft
- Mean low water (MLW)1.5 ft
- Mean lower low water (MLLW)1.1 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 's-Gravenzande
What time is high tide today in 's-Gravenzande?
High tide today is at 4:38 am (8.0 ft) and 4:58 pm (8.3 ft). Low tide is at 9:29 am and 9:55 pm.
What time is high tide tomorrow in 's-Gravenzande?
On Friday, October 30, high tide at 5:22 am and 5:44 pm and low tide at 10:11 am and 10:44 pm.
What is today's tide coefficient?
75: 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 's-Gravenzande?
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: 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 's-Gravenzande today
Tides near 's-Gravenzande
- Monster ▲ 5:03 am
- Hoek van Holland ▲ 4:54 am
- Oostvoorne ▲ 4:35 am
- Stuifakker ▲ 4:28 am
- Vlaardingen ▲ 4:46 am
- Spijkenisse ▲ 5:40 am
Each place with its own tide station; next to it, the time of its first high tide today.
Learn more
's-Gravenzande has no station of its own, so we use the tide at Maasmond Stroommeetpaal (TICON-4), 6.7 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