Portugal Temperature Map

Temperature
Feels like
Rain
Wind
Updated
See the 7-day forecast

Lagos weather forecast and sea temperature

Right now in Lagos: clear skies, 22°C, feels like 21°C.

Expect a mostly clear week in Lagos, with temperatures staying fairly steady between 15°C and 32°C.

Daytime highs this week are close to the August average of 30°C.

Sunrise: 07:02 · Sunset: 20:09 · Day length: 13h 7m

Lagos sea temperature today

Sea water: 17.7°C, practically unchanged all week

Wave height: 0.8m (min 0.5m on 2026-09-03, max 0.8m on 2026-08-28)

Lagos water temperature for the next 7 days · Sea temperature along the whole coast

Next 24 hours

20:00 22°
21:00 21°
22:00 20°
23:00 20°
00:00 20°
01:00 20°
02:00 20°
03:00 20°
04:00 20°
05:00 19°
06:00 19°
07:00 19°
08:00 19°
09:00 21°
10:00 23°
11:00 26°
12:00 27°
13:00 29°
14:00 29°
15:00 29°
16:00 28°
17:00 26°
18:00 25°
19:00 24°
  1. Fri 28/08 clear skies 26°15°
  2. Sat 29/08 sunny and clear 29°19°
  3. Sun 30/08 bright and clear 31°20°
  4. Mon 31/08 clear skies 32°21°
  5. Tue 01/09 sunny and clear 28°20°
  6. Wed 02/09 bright and clear 32°18°
  7. Thu 03/09 clear skies 31°20°

Lagos shares the Algarve headline numbers, around 3,000 hours of sun a year and summers with essentially no rain, but with a western twist. Sitting closer to the Atlantic corner of the coast, it catches more of the northerly wind that wraps around the Sagres headland, so summer afternoons are usually a pleasant 27–28 °C, a touch fresher and breezier than in the central Algarve resorts.

The same west-facing position affects the sea. Summer winds pull deep, cold water toward the surface along the west coast, so the ocean at Lagos typically peaks around 17–18 °C, one or two degrees below the eastern Algarve. Winters are mild and bright, with 16 °C sunny days the norm and rain confined to short spells between November and February.

Climate through the year

Month Min (°C) Max (°C) Rainy days
January 9.7 16.4 6.5
February 10.4 17.2 6.8
March 11.0 18.1 11.4
April 12.7 20.1 9.6
May 14.9 23.6 4.9
June 17.2 26.2 3.0
July 18.7 29.0 0.5
August 19.4 29.8 0.0
September 18.2 27.2 2.9
October 16.5 24.1 7.0
November 12.9 19.5 8.8
December 10.8 17.3 9.0

Going by Lagos's own averages, May is the most balanced month: highs near 24 °C and about 5 rainy days. The hottest month is August at 30 °C, and the wettest is March with 11 rainy days.

Averages for 2016–2025. A rainy day is one with at least 1 mm of precipitation.

Why is the sea colder in Lagos than in the eastern Algarve?

Summer northerlies push surface water away from the west coast and draw cold deeper water up to replace it. Lagos sits close to that upwelling zone, while beaches further east are sheltered from it and warm up more.

When is the sea warmest in Lagos?

In August and September, when it reaches roughly 17–18 °C after a summer of heating. A few days of strong westerly wind can temporarily cool it several degrees at any point in the season.

Does it rain in Lagos in summer?

Almost never. From June to September measurable rain falls on only a handful of days, which is why the western Algarve can promise sunshine with such confidence.