Algarve weather, month by month

In January, when Dublin gets to about 8°C, Algarve reaches 16°C. Warm, dry days, 24°C and over with little rain, come from June to September.

Algarve Dublin. Average daytime high.

Every month

Month	Daytime high	Night-time low	Sea	Rain a month	Dublin, for comparison
January	16°C	8°C	16°C	49mm	8°C
February	17°C	9°C	15°C	42mm	9°C
March	19°C	11°C	16°C	47mm	10°C
April	21°C	12°C	16°C	39mm	12°C
May	24°C	15°C	17°C	26mm	15°C
June	27°C	18°C	19°C	5mm	18°C
July	29°C	20°C	20°C	1mm	20°C
August	29°C	20°C	20°C	3mm	19°C
September	26°C	18°C	21°C	22mm	17°C
October	23°C	16°C	20°C	56mm	14°C
November	20°C	12°C	18°C	76mm	10°C
December	17°C	10°C	17°C	90mm	8°C

Hotels in Algarve

Measured at Faro (IPMA station 554), averaged over 1991 to 2020. Somewhere inland or up a mountain will differ.

Questions

What is the warmest month in Algarve?

July, with daytime highs around 29°C and nights around 20°C. The sea is warmest in September, at about 21°C.

Is Algarve warm in winter?

In January, the coolest month, daytime highs are around 16°C and nights drop to about 8°C. That is 8 degrees warmer than Dublin in the same month.

When is the sea warm enough to swim in Algarve?

It never quite reaches 21°C. The warmest it gets is about 21°C, in September.

When does it rain most in Algarve?

December, with about 90mm on average. Dublin gets about 72mm in December.

Averages for 1991 to 2020. Temperature and rainfall from Met Éireann, AEMET and IPMA. Sea temperature generated using Copernicus Climate Change Service information 2026, adapted, CC BY 4.0.

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