Arai tides
Today, Thursday, October 29, 2026 · local time (GMT+9) · Shizuoka, Japan- 8:11 am4.0 ft
- 6:54 pm4.2 ft
- 1:32 am0.2 ft
- 1:38 pm2.5 ft
- Tide now
- 3.2 ft ↓ falling · low 1:38 pm (2.5 ft)
- Coefficient
- 87 · average coefficient
- Range today
- 3.9 ft
Today there are high tides at 8:11 am (4.0 ft) and 6:54 pm (4.2 ft) and low tides at 1:32 am and 1:38 pm. Tide coefficient 87. Right now the tide is falling toward the low tide at 1:38 pm. In Arai the tide is mixed: two high and two low tides a day, but of quite different heights. The next spring tides: from October 27 to 29.
Today's high and low tides
- ▼ Low tide 1:32 am 0.2 ft
- ▲ High tide 8:11 am 4.0 ft · coef. 87
- ▼ Next low tide 1:38 pm 2.5 ft
- ▲ High tide 6:54 pm 4.2 ft · coef. 82
↓ Falling The tide is falling. 2 h 48 min to low tide at 1:38 pm.
Tide coefficient 87 for the 8:11 am high tide and 82 for the 6:54 pm high tide. Average coefficient. The water rises and falls 3.9 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 NLLW. 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 | 6:07 am · 4:59 pm | Low tide 1:32 am · 0.2 ft | High tide 8:11 am · 4.0 ft | Low tide 1:38 pm · 2.5 ft | High tide 6:54 pm · 4.2 ft | Coef. 87 | 88% | Major periods 12:50 am · 1:23 pm | Medium |
| Fri 30 | 6:08 am · 4:58 pm | Low tide 2:19 am · 0.3 ft | High tide 9:06 am · 3.8 ft | Low tide 2:21 pm · 2.7 ft | High tide 7:32 pm · 4.0 ft | Coef. 74 | 80% | Major periods 1:55 am · 2:27 pm | Medium |
| Sat 31 | 6:09 am · 4:57 pm | Low tide 3:10 am · 0.5 ft | High tide 10:13 am · 3.5 ft | Low tide 3:17 pm · 2.8 ft | High tide 8:20 pm · 3.7 ft | Coef. 60 | 69% | Major periods 2:59 am · 3:30 pm | Medium |
| Sun 1 | 6:10 am · 4:56 pm | Low tide 4:10 am · 0.8 ft | High tide 11:42 am · 3.3 ft | Low tide 4:44 pm · 2.8 ft | High tide 9:35 pm · 3.3 ft | Coef. 46 | 58% | Major periods 4:00 am · 4:28 pm | Medium |
| Mon 2 | 6:11 am · 4:55 pm | Low tide 5:23 am · 1.0 ft | High tide 1:17 pm · 3.3 ft | Low tide 6:50 pm · 2.6 ft | High tide 11:30 pm · 3.1 ft | Coef. 41 | Last quarter | Major periods 4:55 am · 5:21 pm | Medium |
| Tue 3 | 6:12 am · 4:55 pm | Low tide 6:46 am · 1.2 ft | High tide 2:15 pm · 3.4 ft | Low tide 8:17 pm · 2.2 ft | — | Coef. 45 | 36% | Major periods 5:46 am · 6:11 pm | Medium |
| Wed 4 | 6:13 am · 4:54 pm | High tide 1:22 am · 3.1 ft | Low tide 8:06 am · 1.3 ft | High tide 2:52 pm · 3.5 ft | Low tide 9:08 pm · 1.7 ft | Coef. 56 | 26% | Major periods 6:34 am · 6:57 pm | Medium |
▲ high tide · ▼ low tide · heights above NLLW. 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 26 to 27 (coefficient 99, 3.9 ft range). The smallest, from October 18 to 19 (coefficient 25, 1.8 ft).
Type of tide
In Arai the tide is mixed: two high and two low tides a day, but of quite different heights. Types of tides
2026 extremes: the highest tide of the year is on August 14 (4.4 ft) and the lowest, on December 25 (-0.6 ft).
Reference levels
- Highest astronomical tide (HAT)4.7 ft
- Mean higher high water (MHHW)3.7 ft
- Mean high water (MHW)3.6 ft
- Mean sea level (MSL)2.4 ft
- Mean low water (MLW)1.3 ft
- Mean lower low water (MLLW)0.7 ft
- Lowest astronomical tide (LAT)-0.7 ft
Heights above NLLW.
Questions about the tides in Arai
What time is high tide today in Arai?
High tide today is at 8:11 am (4.0 ft) and 6:54 pm (4.2 ft). Low tide is at 1:32 am and 1:38 pm.
What time is high tide tomorrow in Arai?
On Friday, October 30, high tide at 9:06 am and 7:32 pm and low tide at 2:19 am and 2:21 pm.
What is today's tide coefficient?
87: 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 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 Arai?
The tide is mixed: two high and two low tides a day, but of quite different heights. Each high tide comes about 50 minutes later than the day before.
What are the heights measured from?
From NLLW. 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 Arai today
Tides near Arai
- Hamamatsu ▲ 8:12 am
- Toyohashi ▲ 7:55 am
- Gamagōri ▲ 8:04 am
- Koiji Beach ▲ 7:45 am
- Ishiki ▲ 7:57 am
- Sagara ▲ 7:46 am
Each place with its own tide station; next to it, the time of its first high tide today.
Learn more
Tides from the Maisaka station (TICON-4), 2.4 mi from Arai. Times and heights are its predictions. 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