Yffiniac tides
Today, Thursday, October 29, 2026 · local time (CET) · Brittany, France- 8:37 am37.1 ft
- 9:02 pm35.8 ft
- 3:00 am5.0 ft
- 3:23 pm5.4 ft
- Tide now
- 13.9 ft ↓ falling · low 3:00 am (5.0 ft)
- Coefficient
- 94 · spring tides
- Range today
- 32.1 ft
Today there are high tides at 8:37 am (37.1 ft) and 9:02 pm (35.8 ft) and low tides at 3:00 am and 3:23 pm. Tide coefficient 94. Right now the tide is falling toward the low tide at 3:00 am. In Yffiniac 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 low tide 3:00 am 5.0 ft
- ▲ High tide 8:37 am 37.1 ft · coef. 94
- ▼ Low tide 3:23 pm 5.4 ft
- ▲ High tide 9:02 pm 35.8 ft · coef. 89
↓ Falling The tide is falling. 2 h 26 min to low tide at 3:00 am.
Tide coefficient 94 for the 8:37 am high tide and 89 for the 9:02 pm high tide. Spring tides. The water rises and falls 32.1 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 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Thu 29 | 7:52 am · 5:56 pm | Low tide 3:00 am · 5.0 ft | High tide 8:37 am · 37.1 ft | Low tide 3:23 pm · 5.4 ft | High tide 9:02 pm · 35.8 ft | Coef. 94 | 85% | Major periods 2:36 am · 3:09 pm | Medium |
| Fri 30 | 7:53 am · 5:55 pm | Low tide 3:43 am · 6.7 ft | High tide 9:18 am · 35.5 ft | Low tide 4:09 pm · 7.1 ft | High tide 9:46 pm · 33.6 ft | Coef. 84 | 76% | Major periods 3:41 am · 4:13 pm | Medium |
| Sat 31 | 7:55 am · 5:53 pm | Low tide 4:29 am · 9.0 ft | High tide 10:04 am · 33.2 ft | Low tide 4:59 pm · 9.3 ft | High tide 10:37 pm · 31.0 ft | Coef. 71 | 66% | Major periods 4:44 am · 5:14 pm | Medium |
| Sun 1 | 7:57 am · 5:51 pm | Low tide 5:22 am · 11.3 ft | High tide 10:59 am · 30.8 ft | Low tide 5:59 pm · 11.4 ft | High tide 11:44 pm · 28.6 ft | Coef. 57 | Last quarter | Major periods 5:43 am · 6:10 pm | Medium |
| Mon 2 | 7:58 am · 5:50 pm | Low tide 6:28 am · 13.2 ft | High tide 12:16 pm · 28.8 ft | Low tide 7:14 pm · 12.6 ft | — | Coef. 47 | 43% | Major periods 6:37 am · 7:02 pm | Medium |
| Tue 3 | 8:00 am · 5:48 pm | High tide 1:15 am · 27.5 ft | Low tide 7:50 am · 13.7 ft | High tide 1:51 pm · 28.5 ft | Low tide 8:39 pm · 12.2 ft | Coef. 46 | 33% | Major periods 7:26 am · 7:50 pm | Medium |
| Wed 4 | 8:01 am · 5:47 pm | High tide 2:44 am · 28.4 ft | Low tide 9:13 am · 12.4 ft | High tide 3:11 pm · 29.9 ft | Low tide 9:52 pm · 10.6 ft | Coef. 55 | 23% | Major periods 8:13 am · 8:35 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 26 to 28 (coefficient 100, 33.9 ft range). The smallest, on October 20 (coefficient 26, 9.2 ft).
Type of tide
In Yffiniac 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 March 21 (38.4 ft) and the lowest, on March 20 (2.2 ft).
Reference levels
- Highest astronomical tide (HAT)40.5 ft
- Mean higher high water (MHHW)32.6 ft
- Mean high water (MHW)32.4 ft
- Mean sea level (MSL)20.4 ft
- Mean low water (MLW)8.6 ft
- Mean lower low water (MLLW)8.2 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 Yffiniac
What time is high tide today in Yffiniac?
High tide today is at 8:37 am (37.1 ft) and 9:02 pm (35.8 ft). Low tide is at 3:00 am and 3:23 pm.
What time is high tide tomorrow in Yffiniac?
On Friday, October 30, high tide at 9:18 am and 9:46 pm and low tide at 3:43 am and 4:09 pm.
What is today's tide coefficient?
94: 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 9 to 11, after the new or full moon.
How many tides a day are there in Yffiniac?
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 Yffiniac today
Tides near Yffiniac
Each place with its own tide station; next to it, the time of its first high tide today.
Learn more
Yffiniac has no station of its own, so we use the tide at Saint-Quay-Portrieux (TICON-4), 13 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