Weather in San Juan - 14-day forecast

Detailed weather forecast for San Juan, Puerto Rico: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in San Juan

today🌧️ 31°💧 0.5 mm

Thu🌤️ 31°💧 0.1 mm

Fri☁️ 31°💧 0.3 mm

Sat🌧️ 30°💧 0.3 mm

Sun🌧️ 30°💧 0.2 mm

Mon🌧️ 30°💧 1.1 mm

Tue🌧️ 31°💧 0.5 mm

Wed☁️ 30°💧 0.4 mm

14-day forecast - San Juan

📅 San Juan 30 & 45-day weather - long-range outlook

Next 15 days · forecast

31°

around 26° at night · days with rain: 2

Weeks 3-4 · avg for July

32°

around 26° at night · rain chance 50%

Weeks 5-7 · avg for August

32°

around 26° at night · rain chance 55%

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

Day-by-day forecast for San Juan

Wednesday8 July 2026

🌧️31°light rain

sunrise 05:54 · sunset 19:05 · night 27° · evening 28° · rain 0.46 mm · humidity 66% · wind 9 m/s · clouds 75%

Thursday9 July 2026

🌤️31°scattered clouds

sunrise 05:54 · sunset 19:05 · night 27° · evening 29° · rain 0.1 mm · humidity 61% · wind 9 m/s · clouds 49%

Friday10 July 2026

☁️31°broken clouds

sunrise 05:54 · sunset 19:05 · night 26° · evening 29° · rain 0.28 mm · humidity 58% · wind 9 m/s · clouds 52%

Saturday11 July 2026

🌧️30°light rain

sunrise 05:55 · sunset 19:05 · night 27° · evening 29° · rain 0.25 mm · humidity 62% · wind 9 m/s · clouds 78%

Sunday12 July 2026

🌧️30°light rain

sunrise 05:55 · sunset 19:05 · night 26° · evening 29° · rain 0.18 mm · humidity 59% · wind 8 m/s · clouds 6%

Monday13 July 2026

🌧️30°light rain

sunrise 05:55 · sunset 19:05 · night 26° · evening 29° · rain 1.05 mm · humidity 57% · wind 9 m/s · clouds 11%

Tuesday14 July 2026

🌧️31°light rain

sunrise 05:56 · sunset 19:04 · night 26° · evening 30° · rain 0.54 mm · humidity 60% · wind 9 m/s · clouds 41%

Wednesday15 July 2026

☁️30°broken clouds

sunrise 05:56 · sunset 19:04 · night 26° · evening 29° · rain 0.36 mm · humidity 58% · wind 9 m/s · clouds 52%

Thursday16 July 2026

🌧️30°light rain

sunrise 05:57 · sunset 19:04 · night 26° · evening 29° · rain 0.81 mm · humidity 62% · wind 8 m/s · clouds 33%

Friday17 July 2026

🌧️30°light rain

sunrise 05:57 · sunset 19:04 · night 26° · evening 30° · rain 0.54 mm · humidity 63% · wind 8 m/s · clouds 32%

Saturday18 July 2026

🌧️31°light rain

sunrise 05:57 · sunset 19:04 · night 26° · evening 30° · rain 0.3 mm · humidity 56% · wind 8 m/s · clouds 59%

Sunday19 July 2026

🌤️31°a few clouds

sunrise 05:58 · sunset 19:04 · night 26° · evening 30° · rain 0.18 mm · humidity 55% · wind 9 m/s · clouds 23%

Monday20 July 2026

☁️31°broken clouds

sunrise 05:58 · sunset 19:03 · night 27° · evening 30° · rain 1.17 mm · humidity 65% · wind 9 m/s · clouds 64%

Tuesday21 July 2026

🌧️31°light rain

sunrise 05:58 · sunset 19:03 · night 26° · evening 30° · rain 0.87 mm · humidity 57% · wind 8 m/s · clouds 95%

Wednesday22 July 2026

🌧️31°light rain

sunrise 05:59 · sunset 19:03 · night 27° · evening 30° · rain 0.12 mm · humidity 61% · wind 8 m/s · clouds 8%

☀️ UV index in San Juan - is it safe to sunbathe?

Today the UV index in San Juan is 9 (very high) - unprotected fair skin can burn in about 20 minutes. SPF 50, long sleeves and shade between 10:00 and 16:00.

🌊 Sea temperature - San Juan

Water today

28°C

Week avg

28°C

Waves today

1 m

How's the water?

very warm

16-day sea temperature forecast:

8.07 28°C9.07 28°C10.07 28°C11.07 28°C12.07 28°C13.07 28°C14.07 28°C15.07 28°C16.07 28°C

Average sea temperature through the year:

Jan 27°CFeb 27°CMar 27°CApr 27°CMay 28°CJun 29°CJul 29°CAug 30°CSep 30°COct 30°CNov 29°CDec 28°C

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

Air quality and smog in San Juan

Air quality in San Juan is currently very good. Fine particulate PM2.5: 9.2 µg/m³, PM10: 21.2 µg/m³.

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Carolina	9.2	21.2	very good
San Juan	9.2	21.2	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-07-07, 21:00).

San Juan weather through the year

Warmest, driest months on average: January, February, March, April.

🎉 Public holidays in San Juan - when are the long weekends?

Next long weekend in San Juan: Birthday of Don Luis Muñoz Rivera (20 July, Monday) - Saturday–Monday (3 days off).

20 JulyMonday

Birthday of Don Luis Muñoz Rivera

🎈 long weekend

25 JulySaturday

Puerto Rico Constitution Day

falls on a weekend

27 JulyMonday

Birthday of Dr. José Celso Barbosa

🎈 long weekend

7 SeptemberMonday

Labour Day

🎈 long weekend

12 OctoberMonday

Columbus Day

🎈 long weekend

11 NovemberWednesday

Veterans Day

19 NovemberThursday

Discovery of Puerto Rico

🎈 long weekend + bridge day

26 NovemberThursday

Thanksgiving Day

🎈 long weekend + bridge day

24 DecemberThursday

Christmas Eve

🎈 long weekend + bridge day

25 DecemberFriday

Christmas Day

🎈 long weekend

1 JanuaryFriday 2027

New Year's Day

🎈 long weekend

6 JanuaryWednesday 2027

Three Kings Day / Epiphany

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

CarolinaCaguas

FAQ - San Juan weather

What is the weather like in San Juan today?

Today it is about 31° during the day and 27° at night, light rain.

How far ahead can I check the forecast for San Juan?

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.