Plizio Visual Lab

Furnas Lake

Plizio editorial teamUpdated: Jun 2026Data Sources

Lake

Weather…

Furnas Lake is a volcanic crater lake located on the island of São Miguel in the Azores. It sits at an altitude of 281 meters and covers an area of approximately 4.25 square kilometers. The lake is part of an active volcanic complex, as evidenced by the numerous fumaroles and hot springs found along its northern shore. A unique culinary tradition here is the Cozido das Furnas, a stew cooked in the ground using natural geothermal heat near the lake. On the southern bank stands the Neo-Gothic Chapel of Nossa Senhora das Vitórias, completed in the late 19th century. Despite its scenic beauty, the lake has faced eutrophication issues, leading to extensive restoration programs aimed at improving its ecological health and water quality.

Location: Portugal
Top sights: Reserva Florestal de Recreio do Viveiro das Furnas · Banhos Férreos · Furnas Monitoring and Research Center

Best time to visit & climate

The most pleasant time to visit is Jun–Aug.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	16	15	15	16	17	19	21	23	22	20	18	17
Rain mm	67	68	65	56	43	30	18	27	56	74	66	105

📋 Practical info

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Getting there

Reaching this famous volcanic lake involves driving through beautifully winding mountain roads leading down into the distinct Furnas crater on the island of São Miguel. It is highly accessible by rental car or organized tour buses, with clearly marked routes guiding visitors directly to the various scenic geothermal points.

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Best season

The warm summer is undoubtedly the most popular time to visit, offering the highest chance of brilliantly clear skies to view the wooded slopes reflecting in the water. The lush, animated spring is also widely considered spectacular, as the unique flora surrounding the steaming geothermal fields heavily blooms.

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Terrain & paths

The primary paths near the famous bubbling geothermal caldeiras are mostly flat, comfortably paved, and thoughtfully designed to safely handle heavy tourist traffic. For those choosing to fully walk around the lake's perimeter, the terrain shifts into somewhat muddy, uneven forested dirt tracks.

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What to bring

Standard comfortable walking shoes are perfectly fine for merely visiting the steaming cooking holes, but genuinely waterproof hiking boots are strongly advised if walking the full lakeside circuit. A light rain jacket is always essential here, as the localized island weather can shift from intense sun to sudden showers.

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Parking

Organized, highly structured parking lots are reliably available directly adjacent to the main geothermal areas where the traditional local stews are buried and cooked. A nominal fee is typically required to park and enter these carefully maintained specific zones of high geological interest.

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Safety

It is absolutely crucial to stay securely behind the installed wooden fences and clearly marked barriers when observing the boiling mud pools and intensely steaming fumaroles. The ground directly surrounding these volatile geothermal features is extremely unstable, dangerously thin, and scalding hot.

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Time needed

A standard, brief stop simply to see the geothermal activity and take atmospheric photos generally requires about an hour of your travel schedule. Visitors choosing to complete the full, immersive hike completely around the lake's easy on the eye edge should realistically allocate up to three solid hours.