Bosham Tide Tables

Plan ahead with predicted Bosham high tide times from 2026–2030.

For dates within the next seven days, BoshamTide uses official Admiralty predictions. Longer-range times in the yearly tables are generated using an independent open-source Bosham tide model.

LONG-RANGE MODEL

About these long-range predictions

These long-range tide times are calculated using an open-source mathematical tide model fitted specifically for Bosham. The model reports a typical timing error of around ±9 minutes (one standard deviation), so these times should be treated as estimates rather than exact predictions.

A simple 12 hour 25 minute tide clock is out by about 38 minutes on average. This model adds several sinusoidal terms to follow the real deviations from that cycle. Weather, pressure and harbour conditions can still move the actual tide. The tables are for planning, not navigation or safety-critical use.

For the next seven days, BoshamTide uses official Admiralty tide predictions where available. These long-range tables use a separate open-source model and are intended for forward planning. See how these tide predictions are calculated.

The model predicts tide times only. It does not produce reliable heights, so these tables do not include metres above Chart Datum and are not used for Shore Road flood warnings.

Long-range timing model based on the open-source drtonyr/tide project.

Long-range tide times are estimates. The open-source Bosham model reports a typical timing error of around ±9 minutes (one standard deviation). Weather and local harbour conditions can cause additional differences. For immediate tide and flood decisions, use the current Admiralty-based forecast on BoshamTide.