Tough Tides St Peter Port · Guernsey
Height now · above Chart Datum
5.0 m
↑ Rising · 2.1 m/h
High water 20:22 9.0 m in 2 h 53 min
then Low water 02:50 0.9 m
Today's range 8.1 m Springs Waning gibbous, 92% lit Sunrise 06:21 · Sunset 19:59
to high 2 h 53 min
Low water was 14:28

Tide curve

6 h ago → next 30 h · 15-min model · night shaded

Sea conditions

model · 17:00
Sea state
Slight
significant wave 1.1 m
Waves
6 s
from WSW (254°)
Swell
0.8 m
6 s from W
Sea temperature
18.2 °C
surface, model
Wind · our station
13 kn
F4 Moderate breeze · SSW · gusts 16 kn
Pressure · our station
1,017 hPa
air 18.3 °C · UV 1

Sun & moon

Sunday 30 August
Sunrise06:21
Sunset19:59
Daylight13 h 38 min
Civil twilight05:49 – 20:31
Moon Waning gibbous
Illumination92% · day 17.5
Next full moonSat 26 Sep
Next new moonFri 11 Sep

Spring tides (largest ranges) follow new and full moon by a day or two; neaps follow the quarters. Currently springs.

Next 7 days

times local (BST) · heights above Chart Datum
DayHigh & low waterRangeSunMoon
Sun 30 Aug LW 02:15 0.9 m HW 08:09 8.6 m LW 14:28 1.1 m HW 20:22 9.0 m 8.1 m 06:21–19:59 93%
Mon 31 Aug LW 02:50 0.9 m HW 08:43 8.6 m LW 15:02 1.0 m HW 20:58 8.7 m 7.8 m 06:23–19:57 87%
Tue 1 Sep LW 03:20 1.0 m HW 09:15 8.3 m LW 15:35 1.2 m HW 21:31 8.3 m 7.4 m 06:24–19:55 79%
Wed 2 Sep LW 03:52 1.3 m HW 09:52 8.1 m LW 16:10 1.6 m HW 22:07 7.9 m 6.8 m 06:26–19:53 69%
Thu 3 Sep LW 04:30 1.8 m HW 10:31 7.7 m LW 16:49 2.1 m HW 22:52 7.4 m 5.9 m 06:27–19:51 59%
Fri 4 Sep LW 05:11 2.4 m HW 11:17 7.1 m LW 17:41 2.6 m HW 23:52 6.8 m 4.7 m 06:28–19:49 48%
Sat 5 Sep LW 06:07 3.0 m HW 12:22 6.7 m LW 18:57 3.2 m 3.7 m 06:30–19:47 38%

About this data

updated 17:00

Sea level is taken from the Open-Meteo marine model at 15-minute resolution for St Peter Port (49.4547, -2.535) and refreshed every 30 minutes; high and low water are found by parabolic interpolation of that curve. The model reports height relative to mean sea level; this site adds a fixed 5.1 m to show heights above Chart Datum, which is an approximation. Wave, swell and sea-temperature figures come from the same model; wind and pressure are live from our own weather station. Sea level, wave and sea-temperature data by Open-Meteo.com (CC BY 4.0).

Not for navigation. Model predictions ignore local harbour effects and weather surges can add or remove half a metre or more. Use official Admiralty tide tables for anything that matters.