Lagos Portugal Weather | Canada Edition

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By Liam O’Connor, Managing EditorReviewed by Grace PattersonForecast data: Open-Meteo & Environment and Climate Change Canada

Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Edition Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.

Lagos, on Portugal’s southern Algarve coast, enjoys a mild Mediterranean climate. The live forecast above shows current conditions; expect daytime highs near 20°C in October, dropping to around 15°C in January, with most rain falling between November and February.

What is the weather in Lagos, Portugal, by month?

Lagos weather by month follows a classic Mediterranean rhythm. Summers (June–September) are hot and dry, with July and August averaging 28°C. Autumn brings warmth into October (highs near 22°C) before cooling in November (17°C). Winters are mild: December and January see highs of 15–16°C, while February stays similar. Spring (March–May) warms quickly, reaching 20°C by May. For those using Fahrenheit, summer highs hover around 82°F, winter lows around 50°F.

How does the Atlantic influence Lagos?

Lagos sits on the Atlantic-facing Barlavento Algarve, so sea breezes moderate summer heat and keep winter chill at bay. Water temperatures peak at 22°C in August and dip to 15°C in February. The Atlantic also drives the region’s rainfall: November and December are the wettest months, while July and August are nearly rainless. A 30-day forecast for Lagos is less reliable than shorter-range outlooks due to shifting Atlantic systems.

Average annual temperature17.5°C

Hottest monthAugust (28°C average high)

Coolest monthJanuary (15°C average high)

Wettest monthDecember (95 mm rainfall)

What is the weather in Lagos, Portugal, in October?

October is a pleasant transition month. Daytime highs reach 22°C, nights cool to 15°C. Sea temperatures remain warm enough for swimming at 20°C. Rainfall increases but still averages only 60 mm over the month.

What is the weather in Lagos, Portugal, in January?

January is the coolest month, with highs around 15°C and lows of 9°C. Rain is common (80 mm), but sunny spells still occur. The Atlantic water temperature drops to 15°C, so swimming is for the hardy.

Is Lagos weather warm in December?

December in Lagos is mild rather than warm. Daytime highs average 16°C, with overnight lows near 10°C. It’s the wettest month, but many days remain partly sunny. A light jacket is usually enough.