Avonmouth Tide Times

About Avonmouth Tide Times

Avonmouth is a major port complex situated at the mouth of the River Avon where it meets the Severn Estuary, approximately 7 miles north-west of Bristol. The site handles significant container, break-bulk and RoRo cargo traffic, serving as a critical gateway for UK imports and exports. The Avon Gorge creates a naturally confined tidal channel with extreme tidal ranges typical of the Bristol Channel—among the highest in the world. The harbour experiences rapid tidal streams and substantial water level variations, which dictate operational windows for vessel movements. Beyond commercial shipping, the surrounding area includes public riverside walks and local communities. Tidal conditions here are demanding and require careful passage planning.. The tide predictions shown above cover 7 days of high and low tide times, updated daily using professional-grade harmonic tidal analysis. Tide heights are displayed in metres above Chart Datum (CD), the standard reference level used in marine navigation charts.

Tidal patterns at Avonmouth are driven by the gravitational forces of the Moon and Sun acting on the local ocean. The timing and height of each tide depends on the shape of the local coastline, water depth, and the position of celestial bodies relative to Earth. Like all coastal locations, Avonmouth experiences a full tidal cycle approximately every 24 hours and 50 minutes.

Spring tides — which occur at new moon and full moon — produce the largest tidal ranges at Avonmouth, with higher high tides and lower low tides than average. Neap tides, at the quarter moons, produce the smallest ranges. This fortnightly cycle is an important consideration for anyone planning coastal activities in the area.

What to Do at Avonmouth

Avonmouth is located in Bristol, Bristol Channel.

Who Uses Tide Predictions for Avonmouth?

How to Read the Avonmouth Tide Chart

The tide chart above plots predicted water height (in metres) against time for Avonmouth. The curved line rises to peaks (high tide) and falls to troughs (low tide). The height shown is measured above Chart Datum — a reference level set near the lowest predicted astronomical tide level for the area.

• HWHigh Water — the peak of the tide. This is when the sea is at its highest level. The exact time and height changes each day.
• LWLow Water — the trough of the tide. The sea is at its lowest level, often exposing rocks, sand, and mudflats.
• ↑Flood tide — the period when the tide is rising from low water to high water. Currents flow onshore or up estuaries during this phase.
• ↓Ebb tide — the period when the tide is falling from high water to low water. Currents flow offshore or down estuaries during this phase.

All times shown are in the local timezone for Avonmouth (Europe/London). Remember that tide times advance by roughly 50 minutes each day, so always check the chart for your specific visit date.

Frequently Asked Questions — Avonmouth Tides