---
title: "Water height time series"
method: GET
path: "/v1/tides/heights/"
tags: ["Tides"]
---

# Water height time series

`GET /v1/tides/heights/`

## Request

- Base URL: `https://thirdtrail.life`
- URL: `https://thirdtrail.life/v1/tides/heights/`
- Auth: one of:
  - HTTP bearer
  - API key in cookie `sessionid`

Predicted astronomical water height at any coastal point, from the FES2022 global tide atlas. Heights are metres relative to **mean sea level, not chart datum** — do not use for navigation.

## Query parameters

- `days` integer
- `lat` number, double, required
- `lon` number, double, required
- `start_date` string
- `step` string
- `tz` string

## Response `200`

No response body

---

[API](https://skmtc.dev/thirdtrail/apis/thirdtrail-api.md) · [All operations](https://skmtc.dev/thirdtrail/apis/thirdtrail-api/llms.txt) · [OpenAPI document](https://skmtc.dev/thirdtrail/apis/thirdtrail-api/revisions/742040ec3db6?raw)