Weather in São Luís - 14-day forecast

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

Forecast for the next days in São Luís

today🌧️ 29°💧 4.3 mm

Thu🌧️ 27°💧 6.6 mm

Fri🌧️ 30°💧 4.4 mm

Sat🌧️ 29°💧 13.6 mm

Sun🌧️ 28°💧 4.5 mm

Mon🌧️ 28°💧 2.8 mm

Tue🌧️ 28°💧 0.8 mm

Wed🌧️ 28°💧 5.2 mm

14-day forecast - São Luís

📅 São Luís 30 & 45-day weather - long-range outlook

Next 15 days · forecast

28°

around 26° at night · days with rain: 12

Weeks 3-4 · avg for July

31°

around 25° at night · rain chance 31%

Weeks 5-7 · avg for August

32°

around 25° at night · rain chance 9%

The 30 & 45-day outlook for São Luís: the next 15 days are a numerical forecast updated daily - on average 28° by day and 26° at night. Further out we rely on multi-year climate averages: around 31° in July, and about 32° in August. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for São Luís

Wednesday8 July 2026

🌧️29°moderate rain

sunrise 06:03 · sunset 18:02 · night 27° · evening 27° · rain 4.33 mm · humidity 71% · wind 6 m/s · clouds 61%

Thursday9 July 2026

🌧️27°moderate rain

sunrise 06:03 · sunset 18:02 · night 26° · evening 27° · rain 6.6 mm · humidity 80% · wind 7 m/s · clouds 100%

Friday10 July 2026

🌧️30°light rain

sunrise 06:03 · sunset 18:02 · night 27° · evening 27° · rain 4.38 mm · humidity 66% · wind 8 m/s · clouds 2%

Saturday11 July 2026

🌧️29°moderate rain

sunrise 06:03 · sunset 18:02 · night 27° · evening 27° · rain 13.58 mm · humidity 72% · wind 8 m/s · clouds 4%

Sunday12 July 2026

🌧️28°light rain

sunrise 06:03 · sunset 18:02 · night 27° · evening 27° · rain 4.45 mm · humidity 75% · wind 7 m/s · clouds 98%

Monday13 July 2026

🌧️28°light rain

sunrise 06:03 · sunset 18:02 · night 27° · evening 27° · rain 2.82 mm · humidity 78% · wind 8 m/s · clouds 14%

Tuesday14 July 2026

🌧️28°light rain

sunrise 06:03 · sunset 18:03 · night 26° · evening 27° · rain 0.81 mm · humidity 74% · wind 7 m/s · clouds 88%

Wednesday15 July 2026

🌧️28°light rain

sunrise 06:03 · sunset 18:03 · night 26° · evening 27° · rain 5.16 mm · humidity 74% · wind 7 m/s · clouds 41%

Thursday16 July 2026

🌧️28°light rain

sunrise 06:04 · sunset 18:03 · night 26° · evening 27° · rain 2.34 mm · humidity 74% · wind 7 m/s · clouds 30%

Friday17 July 2026

🌧️28°light rain

sunrise 06:04 · sunset 18:03 · night 26° · evening 27° · rain 1.44 mm · humidity 73% · wind 7 m/s · clouds 64%

Saturday18 July 2026

🌧️28°light rain

sunrise 06:04 · sunset 18:03 · night 26° · evening 27° · rain 2.07 mm · humidity 73% · wind 7 m/s · clouds 29%

Sunday19 July 2026

🌧️30°light rain

sunrise 06:04 · sunset 18:03 · night 27° · evening 27° · rain 1.14 mm · humidity 67% · wind 8 m/s · clouds 52%

Monday20 July 2026

☀️28°clear sky

sunrise 06:04 · sunset 18:03 · night 26° · evening 27° · rain 0.18 mm · humidity 66% · wind 7 m/s · clouds 4%

Tuesday21 July 2026

🌧️28°light rain

sunrise 06:04 · sunset 18:03 · night 26° · evening 27° · rain 0.93 mm · humidity 74% · wind 6 m/s · clouds 76%

Wednesday22 July 2026

🌧️28°light rain

sunrise 06:04 · sunset 18:03 · night 27° · evening 27° · rain 3.6 mm · humidity 73% · wind 6 m/s · clouds 100%

☀️ UV index in São Luís - is it safe to sunbathe?

Today the UV index in São Luís is 8 (high) - unprotected fair skin can burn in about 25 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.

🌊 Sea temperature - São Luís

Water today

30°C

Week avg

30°C

How's the water?

very warm

16-day sea temperature forecast:

8.07 30°C9.07 30°C10.07 30°C11.07 30°C12.07 30°C13.07 30°C14.07 30°C15.07 29°C16.07 29°C

Average sea temperature through the year:

Jan 30°CFeb 30°CMar 30°CApr 30°CMay 31°CJun 30°CJul 30°CAug 30°CSep 29°COct 29°CNov 29°CDec 29°C

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

Air quality and smog in São Luís

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Kurytyba	32.4	33.3	good
Salvador	21.3	22.9	good
Campinas	20.3	21	good
Belo Horizonte	15.7	16.2	good
Maceio	15.4	19.2	good
Manaus	15.1	15.5	good
São Paulo	14.1	15.4	good
Fortaleza	11.4	18.2	very good
Rio de Janeiro	11.1	13.7	very good
Duque de Caxias	11.1	13.7	very good
Brasília	10.3	10.5	very good
Guarulhos	10.2	11.7	very good
Porto Alegre	8.7	8.7	very good
Nova Iguaçu	7.9	10.6	very good
Natal	7.4	11.8	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-07-07, 22:00).

São Luís weather through the year

🎉 Public holidays in São Luís - when are the long weekends?

Next long weekend in São Luís: Independence Day (7 September, Monday) - Saturday–Monday (3 days off).

7 SeptemberMonday

Independence Day

🎈 long weekend

12 OctoberMonday

Our Lady of Aparecida

🎈 long weekend

2 NovemberMonday

All Souls' Day

🎈 long weekend

15 NovemberSunday

Republic Proclamation Day

falls on a weekend

20 NovemberFriday

Black Awareness Day

🎈 long weekend

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

21 AprilWednesday 2027

Tiradentes

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

TeresinaBelém

FAQ - São Luís weather

What is the weather like in São Luís today?

Today it is about 29° during the day and 27° at night, moderate rain.

How far ahead can I check the forecast for São Luís?

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.