---
title: Instituto Hidrográfico
summary: The Portuguese Navy's hydrographic institute: wave buoys, tide gauges and the official tide predictions.
mount: <div class="card"><p class="kicker">Bodies</p><div class="wx-scroll" tabindex="0"><svg class="mg" viewBox="0 0 994 96" width="994" height="96" role="img" aria-label="Instituto Hidrográfico: what it is connected to"><style>.mg text{font:12px var(--sans);fill:var(--ink)}.mg .mg-sub,.mg .mg-verb{font-size:10px;fill:var(--ink-2)}.mg-node rect{fill:var(--surface);stroke:var(--line-2)}.mg-node.me rect{stroke:var(--focus);stroke-width:2}.mg-node.unstated rect{stroke-dasharray:2 3;fill:var(--paper)}a.mg-node:hover rect,a.mg-node:focus rect{stroke:var(--focus);stroke-width:2}.mg-edge{fill:none;stroke:var(--ink-2);stroke-opacity:.55;stroke-width:1}.mg-edge.unv{stroke-dasharray:5 4}</style><path class="mg-edge" d="M610 48C685 48 685 23 760 23"><title>stated on the page: hidrografico.pt</title></path><text class="mg-verb" x="752" y="19" text-anchor="end">operates</text><a class="mg-node " href="obs-ih-buoys.html"><rect x="760" y="8" width="230" height="30" rx="4"/><text x="767" y="21">Instituto Hidrográfico&#39;s wave buoys</text><text class="mg-sub" x="767" y="33">Observing systems</text></a><path class="mg-edge" d="M610 48C685 48 685 63 760 63"><title>stated on the page: hidrografico.pt</title></path><text class="mg-verb" x="752" y="59" text-anchor="end">publishes</text><a class="mg-node " href="data-ih-tides.html"><rect x="760" y="48" width="230" height="30" rx="4"/><text x="767" y="61">Tide predictions (Instituto Hidrogr…</text><text class="mg-sub" x="767" y="73">Open data and APIs</text></a><g class="mg-node me"><rect x="380" y="33" width="230" height="30" rx="4"/><text x="387" y="46">Instituto Hidrográfico</text><text class="mg-sub" x="387" y="58">Bodies</text></g></svg></div><p class="wx-legend meta">Left: what points at it. Right: what it points at. Each line carries its verb; a dashed line was not confirmed on the page cited, or the site does not say; the table below gives the page and the time read for each. <span class="prov">From <a href="body-ih.json">body-ih.json</a></span></p></div>
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# Instituto Hidrográfico

> Kept by incident.meteorology@web-summit.dinis, 11 November 2026, 11:36 UTC

[Where a forecast comes from](../index.md) · Bodies · id `body-ih` · [as data](body-ih.json)

The Portuguese Navy's hydrographic institute: wave buoys, tide gauges and the official tide predictions.

**Address:** [https://www.hidrografico.pt/](https://www.hidrografico.pt/) (leaves this site)  
**Our page about the site** (by incident.weatherwatch@): [research/weather-sites](../../research/weather-sites/sites/hidrografico.md)

## What it is connected to, and who says so

| This | Verb | That | The page that says so | Read | Check |
|---|---|---|---|---|---|
| Instituto Hidrográfico | **operates** | [Instituto Hidrográfico's wave buoys](obs-ih-buoys.md) | [hidrografico.pt](https://www.hidrografico.pt/): "Hidrográfico comemora o 66.º Aniversário Anterior Seguinte Recrutamento Consultar recrutamento Junta-te a nós! --> Rede de Bóias Fechar Os dados das boias estão temporariamente indisponíveis. Tenta novamente mais tarde. " | 11:28 UTC, 11 Nov | stated on the page |
| Instituto Hidrográfico | **publishes** | [Tide predictions (Instituto Hidrográfico)](data-ih-tides.md) | [hidrografico.pt](https://www.hidrografico.pt/): "temporariamente indisponíveis. Tenta novamente mais tarde. Os dados são obtidos através da plataforma: Fechar Previsão de Marés Fechar Dia: Período 1 2 3 4 5 6 7 Os dados de marés estão temporariamente indisponíveis. Ten" | 11:28 UTC, 11 Nov | stated on the page |

## Licence: what we may do with it

No licence row yet covers this node: **unclear** until one does. [The licence table](../licences.md).

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Not a warning service: this page explains where data comes from. For warnings follow [IPMA](https://www.ipma.pt/pt/otempo/prev-sam/) and ANEPC.