Georgetown tides
Today, Thursday, October 29, 2026 · local time (GMT) · Saint Helena, Saint Helena- 8:00 am3.2 ft
- 8:28 pm3.4 ft
- 1:46 am0.4 ft
- 2:01 pm0.5 ft
- Tide now
- 0.6 ft ↑ rising · high 8:00 am (3.2 ft)
- Coefficient
- 88 · average coefficient
- Range today
- 2.9 ft
Today there are high tides at 8:00 am (3.2 ft) and 8:28 pm (3.4 ft) and low tides at 1:46 am and 2:01 pm. Tide coefficient 88. Right now the tide is rising toward the high tide at 8:00 am. In Georgetown 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
- ▼ Low tide 1:46 am 0.4 ft
- ▲ Next high tide 8:00 am 3.2 ft · coef. 88
- ▼ Low tide 2:01 pm 0.5 ft
- ▲ High tide 8:28 pm 3.4 ft · coef. 81
↑ Rising The tide is rising. 5 h 28 min to high tide at 8:00 am.
Tide coefficient 88 for the 8:00 am high tide and 81 for the 8:28 pm high tide. Average coefficient. The water rises and falls 2.9 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 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 | 6:30 am · 6:53 pm | Low tide 1:46 am · 0.4 ft | High tide 8:00 am · 3.2 ft | Low tide 2:01 pm · 0.5 ft | High tide 8:28 pm · 3.4 ft | Coef. 88 | 85% | Major periods 2:25 am · 2:58 pm | Medium |
| Fri 30 | 6:30 am · 6:53 pm | Low tide 2:40 am · 0.6 ft | High tide 8:55 am · 2.9 ft | Low tide 2:50 pm · 0.7 ft | High tide 9:26 pm · 3.2 ft | Coef. 75 | 76% | Major periods 3:30 am · 4:02 pm | Low |
| Sat 31 | 6:30 am · 6:53 pm | Low tide 3:44 am · 0.8 ft | High tide 10:01 am · 2.7 ft | Low tide 3:49 pm · 1.0 ft | High tide 10:36 pm · 3.1 ft | Coef. 61 | 65% | Major periods 4:33 am · 5:03 pm | Medium |
| Sun 1 | 6:30 am · 6:53 pm | Low tide 5:02 am · 1.0 ft | High tide 11:24 am · 2.5 ft | Low tide 5:04 pm · 1.2 ft | High tide 11:58 pm · 3.1 ft | Coef. 52 | Last quarter | Major periods 5:32 am · 5:59 pm | Medium |
| Mon 2 | 6:29 am · 6:53 pm | Low tide 6:32 am · 1.1 ft | High tide 12:57 pm · 2.5 ft | Low tide 6:31 pm · 1.3 ft | — | Coef. 51 | 43% | Major periods 6:25 am · 6:51 pm | Medium |
| Tue 3 | 6:29 am · 6:53 pm | High tide 1:18 am · 3.2 ft | Low tide 7:52 am · 1.0 ft | High tide 2:14 pm · 2.7 ft | Low tide 7:49 pm · 1.2 ft | Coef. 57 | 32% | Major periods 7:15 am · 7:38 pm | Low |
| Wed 4 | 6:29 am · 6:54 pm | High tide 2:24 am · 3.4 ft | Low tide 8:51 am · 0.9 ft | High tide 3:11 pm · 2.9 ft | Low tide 8:50 pm · 1.1 ft | Coef. 66 | 23% | Major periods 8:01 am · 8:23 pm | Low |
▲ 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 27 (coefficient 101, 3.5 ft range). The smallest, from October 18 to 19 (coefficient 25, 0.6 ft).
Type of tide
In Georgetown 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 August 14 (4.2 ft) and the lowest, on November 25 (0.2 ft).
Reference levels
- Highest astronomical tide (HAT)4.5 ft
- Mean higher high water (MHHW)3.4 ft
- Mean high water (MHW)3.2 ft
- Mean sea level (MSL)2.0 ft
- Mean low water (MLW)0.9 ft
- Mean lower low water (MLLW)0.8 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 Georgetown
What time is high tide today in Georgetown?
High tide today is at 8:00 am (3.2 ft) and 8:28 pm (3.4 ft). Low tide is at 1:46 am and 2:01 pm.
What time is high tide tomorrow in Georgetown?
On Friday, October 30, high tide at 8:55 am and 9:26 pm and low tide at 2:40 am and 2:50 pm.
What is today's tide coefficient?
88: 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 Georgetown?
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 Georgetown today
Learn more
Tides from the Ascension station (UHSLC, TICON-4), 0.9 mi from Georgetown. 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