Open Data

UKHO Tidal API MCP Server

Chat with AI and run tools instantly.

Ask AI agents for official UK high and low water times, tide heights, and station details across 607 coastal stations — connect once and plan harbour windows, sailing trips, and coastal shoots from chat.

Best forMarina OperatorsSailing ClubsCoastal PlannersHarbour

Try this workflow

London Bridge tides this week

What are the high and low tides at London Bridge this week? List each event with time and height, and note that times are in GMT.

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Managed
5 tools
Agent guide included

Chat with AI and run tools instantly.

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What you can do with UKHO Tidal API

Built for

Marina Operators, Sailing Clubs, Coastal Planners, Harbour Teams, Film & Location Scouts

Example workflows

London Bridge tides this week

Resolves a named station, then returns the current week's HW/LW schedule.

Try this

What are the high and low tides at London Bridge this week? List each event with time and height, and note that times are in GMT.

Find a tidal station

Uses the station catalog with a name filter before tide lookups.

Try this

Find tidal stations near Plymouth and show coordinates, country, and station type for the best match.

Harbour window planning

Turns a station id into a week of structured tide events for operations.

Try this

For station 0113, list high and low water events for the next seven days with predicted heights so I can plan safe entry windows.

Continue the same station

Shows last-station memory for follow-up tidal questions in one conversation.

Try this

After checking Dover tides, ask for tomorrow's high and low water again without re-stating the station name.

Context to know first

What UK tidal data can AI agents retrieve?

Agents can list ADMIRALTY tidal stations around the United Kingdom, fetch station metadata, and return high water and low water predictions with times and heights for the current day plus six days ahead.

How do I get UK tidal predictions in chat?

Connect the UKHO Tidal server in your workspace, then ask for tides by place name — for example, high and low water at London Bridge this week.

Are tide times in GMT or British Summer Time?

Predicted times are published in GMT only. Agents should convert to BST when presenting summer schedules to people planning around local clock time.

Related editorial

UK Tidal Predictions Workflows with AI

How AI agents retrieve ADMIRALTY high and low water times, tide heights, and station metadata for 607 UK coastal stations from chat.

Read article

AI Skill
SKILL.md

Domain knowledge for UKHO Tidal API — workflow patterns, data models, and gotchas for your AI agent.

UKHO Tidal

Authoritative ADMIRALTY tidal height predictions for Standard and Secondary tidal level stations around the United Kingdom.

Data Model

  • Stations — 607 tidal stations around the UK with metadata (name, country, coordinates, type).
  • Tidal Events — High Water (HW) and Low Water (LW) events with predicted times and heights.

Key Patterns

  • Station IDs are alphanumeric strings (e.g. '0001', '0113').
  • Predictions cover the current day plus six days of HW/LW events.
  • All times are in GMT (Greenwich Mean Time) — BST is never applied.
  • Coordinates follow geoJSON convention: longitude first, then latitude.
  • Some stations only have High Water data (e.g. Rye Harbour dries out at low water).
  • Some south coast stations may show 4 high waters per day due to double-HW effects.
  • After the first station-scoped call, tools remember the last station_id on the credential for 24 hours — omit station_id on follow-up tidal-event calls when continuing the same station.

Snapshot caching

  • Station catalog responses are cached per credential. Filter by name locally without a new upstream call. Use refresh=true only when the user explicitly wants a fresh catalog pull.
  • Tidal event tools cache upstream payloads per (station_id, duration/start_date) fingerprint. Use allow_stale=true (default) to reuse cached tides when data is past fresh TTL.

Gotchas

  • Fair use: Upstream limits apply — pace repeat calls; agents rarely see throughput errors.
  • GMT only: All predicted times are GMT. Consumers must handle BST conversion.
  • Channel Islands excluded: Tidal data for Channel Island stations is not available.
  • Attribution: Every response includes Crown copyright attribution — preserve it when quoting data.

Tools in this Server (5)

Ukho Tidal Get Events Range

Get tidal events (high/low water) for a station within a specific date range. Specify a start date and duration in days. Returns predicted high and lo...

Ukho Tidal Get Station

Get detailed information about a specific UKHO tidal station by its ID. Returns station name, country, type (primary/secondary), coordinates (longitud...

Ukho Tidal Get Tidal Events

Get tidal events (high water and low water times and heights) for a specific UKHO station. Returns predicted high/low tide times and heights in metres...

Ukho Tidal List Snapshots

List cached UKHO tidal upstream snapshots stored for the connected credential: surface, argument fingerprint, fetch time, and payload size. Use this t...

Ukho Tidal List Stations

List tidal stations from the UK Hydrographic Office. Returns all 607 tidal stations around the United Kingdom with their IDs, names, countries, and co...

Frequently Asked Questions

What UK tidal data can AI agents retrieve?

Agents can list ADMIRALTY tidal stations around the United Kingdom, fetch station metadata, and return high water and low water predictions with times and heights for the current day plus six days ahead.

How do I get UK tidal predictions in chat?

Connect the UKHO Tidal server in your workspace, then ask for tides by place name — for example, high and low water at London Bridge this week.

Are tide times in GMT or British Summer Time?

Predicted times are published in GMT only. Agents should convert to BST when presenting summer schedules to people planning around local clock time.

How many UK tidal stations are covered?

The catalog covers 607 Standard and Secondary tidal level stations around the United Kingdom. Channel Island stations are excluded from this dataset.

Does this replace official navigation charts or pilotage?

No. It is authoritative prediction data for planning and research workflows, not a substitute for chart work, local pilotage, or safety-critical navigation decisions at sea.

How do I connect UKHO Tidal API to my AI agent?

Add the MCPBundles server URL to your MCP client configuration (Claude Desktop, Cursor, VS Code, etc.). The URL format is: https://mcp.mcpbundles.com/bundle/ukho-tidal. Authentication is handled automatically.

How many tools does UKHO Tidal API provide?

UKHO Tidal API provides 5 tools that can be called by AI agents, along with a SKILL.md that gives your AI agent domain knowledge about when and how to use them.

What authentication does UKHO Tidal API require?

UKHO Tidal API uses open data APIs — no authentication required.

Setup Instructions

Connect UKHO Tidal API to any MCP client in minutes

MCP URL
https://mcp.mcpbundles.com/bundle/ukho-tidal
Claude.aiCursorVS CodeVS Code InsidersGooseLM StudioCherry StudioChatGPT

One-click install:

Install on Claude.aiInstall for organization (admins)

The link prefills the Add custom connector dialog — you still review the values and click Add, then Connect to complete OAuth.

Or add manually

  1. Open claude.ai → Settings → Connectors.
  2. Click the + button and choose Add custom connector.
  3. Set Name to UKHO Tidal API and paste the MCP URL into Remote MCP server URL.
  4. Click Add. UKHO Tidal API will appear under Not connected — select it and click Connect to complete OAuth.
Name: UKHO Tidal API
Remote MCP server URL: https://mcp.mcpbundles.com/bundle/ukho-tidal
Authentication: OAuth

Custom connectors at claude.ai require a paid Claude plan (Pro, Max, Team, or Enterprise).

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Try UKHO Tidal API now

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