Weather in Sintra - 14-day forecast

Detailed weather forecast for Sintra, Portugal: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Sintra

today🌤️ 27°💧 0.7 mm

Thu🌤️ 23°night 19°

Fri☁️ 23°💧 0.1 mm

Sat☀️ 23°💧 0.6 mm

Sun☁️ 22°💧 0.8 mm

Mon☁️ 22°💧 2.5 mm

Tue☁️ 22°💧 1.2 mm

Wed☀️ 22°💧 0.1 mm

⚠️ Weather warnings - Sintra

🌡️Heatorange level

from 6 Jul, 08:31 to 9 Jul, 20:00

Areas: Portugal

High temperatures and risk of overheating. Drink plenty of water, avoid the midday sun and look after the elderly.

Source: national weather service via Meteoalarm (EUMETNET). Yellow - be aware, orange - be prepared, red - take action.

14-day forecast - Sintra

📅 Sintra 30 & 45-day weather - long-range outlook

Next 16 days · forecast

23°

around 19° at night · days with rain: 2

Weeks 3-4 · avg for July

29°

around 17° at night · rain chance 6%

Weeks 5-7 · avg for August

30°

around 17° at night · rain chance 2%

The 30 & 45-day outlook for Sintra: the next 16 days are a numerical forecast updated daily - on average 23° by day and 19° at night. Further out we rely on multi-year climate averages: around 29° in July, and about 30° in August. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Sintra

Wednesday8 July 2026

🌤️27°scattered clouds

sunrise 06:20 · sunset 21:05 · night 18° · evening 23° · rain 0.69 mm · humidity 50% · wind 6 m/s · clouds 39%

Thursday9 July 2026

🌤️23°a few clouds

sunrise 06:20 · sunset 21:05 · night 19° · evening 21° · humidity 59% · wind 5 m/s · clouds 24%

Friday10 July 2026

☁️23°broken clouds

sunrise 06:21 · sunset 21:04 · night 18° · evening 21° · rain 0.12 mm · humidity 64% · wind 6 m/s · clouds 52%

Saturday11 July 2026

☀️23°clear sky

sunrise 06:22 · sunset 21:04 · night 19° · evening 21° · rain 0.6 mm · humidity 60% · wind 6 m/s · clouds 2%

Sunday12 July 2026

☁️22°overcast clouds

sunrise 06:22 · sunset 21:04 · night 19° · evening 21° · rain 0.84 mm · humidity 64% · wind 5 m/s · clouds 91%

Monday13 July 2026

☁️22°broken clouds

sunrise 06:23 · sunset 21:03 · night 18° · evening 21° · rain 2.52 mm · humidity 56% · wind 5 m/s · clouds 72%

Tuesday14 July 2026

☁️22°overcast clouds

sunrise 06:24 · sunset 21:03 · night 19° · evening 21° · rain 1.23 mm · humidity 68% · wind 4 m/s · clouds 88%

Wednesday15 July 2026

☀️22°clear sky

sunrise 06:24 · sunset 21:02 · night 19° · evening 21° · rain 0.12 mm · humidity 71% · wind 4 m/s · clouds 2%

Thursday16 July 2026

☀️22°clear sky

sunrise 06:25 · sunset 21:02 · night 19° · evening 21° · humidity 63% · wind 8 m/s · clouds 9%

Friday17 July 2026

☀️24°clear sky

sunrise 06:26 · sunset 21:01 · night 19° · evening 22° · rain 0.45 mm · humidity 56% · wind 9 m/s · clouds 7%

Saturday18 July 2026

☀️23°clear sky

sunrise 06:27 · sunset 21:00 · night 19° · evening 21° · humidity 62% · wind 7 m/s · clouds 2%

Sunday19 July 2026

☀️22°clear sky

sunrise 06:27 · sunset 21:00 · night 19° · evening 21° · humidity 60% · wind 6 m/s · clouds 16%

Monday20 July 2026

☀️22°clear sky

sunrise 06:28 · sunset 20:59 · night 19° · evening 21° · humidity 63% · wind 6 m/s · clouds 50%

Tuesday21 July 2026

☀️21°clear sky

sunrise 06:29 · sunset 20:58 · night 17° · evening 19° · humidity 55% · wind 9 m/s · clouds 14%

Wednesday22 July 2026

☀️22°clear sky

sunrise 06:30 · sunset 20:58 · night 18° · evening 20° · humidity 50% · wind 9 m/s · clouds 36%

Thursday23 July 2026

☀️25°clear sky

sunrise 06:31 · sunset 20:57 · night 25° · evening 25° · humidity 56% · wind 7 m/s

☀️ UV index in Sintra - is it safe to sunbathe?

Today the UV index in Sintra is 7 (high) - unprotected fair skin can burn in about 30 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.

🌿 Pollen in Sintra - info for allergy sufferers

Today grasses pollen is highest in Sintra - about 11 grains/m³, moderate level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

🌊 Sea temperature - Sintra

Water today

18°C

Week avg

19°C

Waves today

0.8 m

How's the water?

cold

16-day sea temperature forecast:

8.07 18°C9.07 18°C10.07 18°C11.07 18°C12.07 19°C13.07 19°C14.07 19°C15.07 20°C16.07 19°C

Average sea temperature through the year:

Jan 16°CFeb 15°CMar 15°CApr 16°CMay 16°CJun 18°CJul 18°CAug 17°CSep 17°COct 19°CNov 18°CDec 16°C

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Sintra

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Braga	14.4	22.6	good
Funchal Municipality	11.6	23.1	very good
Coimbra	10.8	17.1	very good
Porto	10.2	20	very good
Setúbal	9	15.1	very good
Lizbona	8.1	13.9	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-07-08, 02:00).

Sintra weather through the year

🎉 Public holidays in Sintra - when are the long weekends?

Next long weekend in Sintra: Republic Day (5 October, Monday) - Saturday–Monday (3 days off).

15 AugustSaturday

Assumption Day

falls on a weekend

5 OctoberMonday

Republic Day

🎈 long weekend

1 NovemberSunday

All Saints Day

falls on a weekend

1 DecemberTuesday

Restoration of Independence

🎈 long weekend + bridge day

8 DecemberTuesday

Immaculate Conception

🎈 long weekend + bridge day

25 DecemberFriday

Christmas Day

🎈 long weekend

1 JanuaryFriday 2027

New Year's Day

🎈 long weekend

26 MarchFriday 2027

Good Friday

🎈 long weekend

28 MarchSunday 2027

Easter Sunday

falls on a weekend

25 AprilSunday 2027

Freedom Day

falls on a weekend

1 MaySaturday 2027

Labour Day

falls on a weekend

27 MayThursday 2027

Corpus Christi

🎈 long weekend + bridge day

Public holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave.

Nearby places

Lisbon

FAQ - Sintra weather

What is the weather like in Sintra today?

Today it is about 27° during the day and 18° at night, scattered clouds.

How far ahead can I check the forecast for Sintra?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.