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Weather in San Juan — today

Tomorrow Day after tomorrow 3 days Week 14 days Month forecast Weather archive

Now in San Juan

⛅

+28°

Partly cloudy

Feels like +32° · humidity 80%

Today 12.9: +29° / +27°

🕐 01:25

Wind

12 km/h

UV index

Air (AQI)

42 · Moderate

Precipitation

37%

Humidity

80%

Pressure

1016 hPa

Sunrise / sunset

06:11 / 18:29

Sea temperature

🌊 +30°

👕 What to wear today

Warm — a T-shirt and light trousers or shorts.

💨 WindyFeels warmer by 4°

Weather for an activity:

🎣 fishing 🏖️ the beach 🏃 a run 📸 a photo shoot 🚶 a walk

Detailed weather information for San Juan

Today, 12 September, Saturday, in San Juan (Puerto Rico): cloudy, light rain in places, warm. During the day the air will warm up to +29°, at night around +27°. Due to high humidity it feels like +32°. Wind up to 23 km/h. Brief rain is possible — an umbrella won't hurt. Light summer clothing will do — a T-shirt and shorts or light trousers. The sea has warmed up to +30° — great for swimming. The sun will rise at 06:11 and set at 18:29 — daylight lasts 12 hours.

Hourly weather in San Juan

💧 The bars at the bottom show the hourly precipitation probability. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).

Weather in San Juan for 14 days

Tap a day to expand it by time of day and open the full forecast. The bar shows the range from the night low (left) to the day high (right).

▶

Today 12.9

🌦️

💧 37%

+27° +29°

Morning

🌤️

+28°

Day

🌦️

+29°

Evening

🌇

+29°

Night

🌙

+27°

Drizzle · precipitation 37% · wind up to 23 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Tomorrow 13.9

⛈️

💧 90%

+27° +29°

Morning

☀️

+28°

Day

⛈️

+29°

Evening

🌇

+28°

Night

🌙

+27°

Thunderstorm · precipitation 90% · wind up to 21 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Mon 14.9

🌦️

💧 78%

+25° +30°

Morning

🌦️

+27°

Day

🌦️

+30°

Evening

🌇

+29°

Night

🌙

+25°

Drizzle · precipitation 78% · wind up to 25 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Tue 15.9

🌦️

💧 69%

+25° +30°

Morning

🌦️

+27°

Day

🌦️

+30°

Evening

🌇

+29°

Night

🌙

+25°

Drizzle · precipitation 69% · wind up to 26 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Wed 16.9

🌦️

💧 42%

+24° +29°

Morning

🌦️

+26°

Day

🌦️

+29°

Evening

🌇

+28°

Night

🌙

+24°

Drizzle · precipitation 42% · wind up to 26 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Thu 17.9

🌦️

💧 94%

+26° +30°

Morning

🌦️

+27°

Day

🌦️

+30°

Evening

🌇

+29°

Night

🌙

+26°

Drizzle · precipitation 94% · wind up to 20 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Fri 18.9

🌦️

💧 65%

+26° +29°

Morning

🌦️

+27°

Day

🌦️

+29°

Evening

🌇

+28°

Night

🌙

+26°

Drizzle · precipitation 65% · wind up to 16 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Sat 19.9

☁️

💧 48%

+26° +29°

Morning

☁️

+27°

Day

☁️

+29°

Evening

🌇

+28°

Night

🌙

+26°

Overcast · precipitation 48% · wind up to 19 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Sun 20.9

🌦️

💧 54%

+26° +29°

Morning

🌦️

+27°

Day

🌦️

+29°

Evening

🌇

+28°

Night

🌙

+26°

Drizzle · precipitation 54% · wind up to 7 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Mon 21.9

🌦️

💧 61%

+26° +29°

Morning

🌦️

+27°

Day

🌦️

+29°

Evening

🌇

+28°

Night

🌙

+26°

Drizzle · precipitation 61% · wind up to 6 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Tue 22.9

🌦️

💧 68%

+26° +29°

Morning

🌦️

+27°

Day

🌦️

+29°

Evening

🌇

+28°

Night

🌙

+26°

Drizzle · precipitation 68% · wind up to 6 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Wed 23.9

🌦️

💧 56%

+26° +29°

Morning

🌦️

+27°

Day

🌦️

+29°

Evening

🌇

+28°

Night

🌙

+26°

Rain showers · precipitation 56% · wind up to 19 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Thu 24.9

🌦️

💧 70%

+27° +29°

Morning

🌦️

+28°

Day

🌦️

+29°

Evening

🌇

+29°

Night

🌙

+27°

Drizzle · precipitation 70% · wind up to 23 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

▶

Fri 25.9

🌦️

💧 74%

+27° +29°

Morning

🌦️

+28°

Day

🌦️

+29°

Evening

🌇

+29°

Night

🌙

+27°

Drizzle · precipitation 74% · wind up to 14 km/h.
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.

🗺️ Precipitation radar

Precipitation radar (RainViewer) over a clean base map — updates every 5–10 minutes. Colours show nearby precipitation; if there is none, the map is simply clear — that is normal. Zoom with + / −.

Rain intensity:lightmoderateheavy

🎯 What to do in this weather — indices of the day

Comfort score from 0 (bad) to 100 (excellent), calculated from the day's weather. For “rain” and “UV” a percentage/risk level is shown.

🏖️ Beach

70 / 100

for sea and sun · Good

🏊 Swimming

39 / 100

water 30° · So-so

🏃 Running

10 / 100

comfort for running · Bad

🧴 UV

moderate · low

☂️ Rain

37%

possible · moderate

✨ Stars

62 / 100

evening visibility · Average

🧺 Laundry drying

25 / 100

will dry outside · So-so

🚗 Car wash

51 / 100

no rain expected · Average

🌫️ Air quality

Moderate air

European AQI

PM2.5: 18PM10: 52O₃: 37NO₂: 1

Moderate. Those sensitive to dust should be more careful during long outdoor exercise.

🌅 Sun, moon and sea

Sunrise

06:11

Sunset

18:29

Golden hour

18:00

Daylight

12 h (-1 min vs yesterday)

Sea temperature

+30°

🌊 slight, waves 0.8 m.

San Juan climate by month

Long-term averages. Hover over a bar for details. The forecast for a specific month is a combination of the climate normal and the model forecast for the coming weeks.

+28°

+21°

Jan

+28°

+21°

Feb

+29°

+21°

Mar

+30°

+22°

Apr

+30°

+23°

May

+31°

+24°

Jun

+31°

+25°

Jul

+31°

+25°

Aug

+31°

+24°

Sep

+30°

+24°

Oct

+29°

+23°

Nov

+28°

+22°

Dec

swipe sideways →

Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit

Month	Day	Night	Sea	Precipitation	What to pack and what makes the month notable (events, nuances)
January	+28°	+21°	+27°	43 mm	Gentle warmth — about +28° daytime, great walking weather. 😊 light summer clothing. Water at +27° — great for swimming. This is the coldest month of the year.
February	+28°	+21°	+27°	31 mm	A comfortable month: +28° by day without exhausting heat. 😊 light summer clothing. Water at +27° — great for swimming. Weather-wise, one of the three best months to visit.
March	+29°	+21°	+27°	41 mm	Warm and comfortable: +29° by day, +21° at night. 😊 light summer clothing. Water at +27° — great for swimming.
April	+30°	+22°	+27°	73 mm	Gentle warmth — about +30° daytime, great walking weather. Frequent rain (73 mm over the month) — keep indoor backup plans. 😊 light summer clothing. Water at +27° — great for swimming.
May	+30°	+23°	+28°	108 mm	A comfortable month: +30° by day without exhausting heat. One of the wettest months (108 mm): downpours can derail plans. 😊 light summer clothing. Water at +28° — great for swimming.
June	+31°	+24°	+29°	62 mm	Warm and comfortable: +31° by day, +24° at night. It's a rainy month (62 mm) — an umbrella is a must. 😊 light summer clothing. Water at +29° — great for swimming. The longest daylight hours of the year — more time for everything.
July	+31°	+25°	+29°	68 mm	Gentle warmth — about +31° daytime, great walking weather. Frequent rain (68 mm over the month) — keep indoor backup plans. 😊 light summer clothing. Water at +29° — great for swimming.
August	+31°	+25°	+30°	82 mm	A comfortable month: +31° by day without exhausting heat. One of the wettest months (82 mm): downpours can derail plans. 😊 light summer clothing. The sea is +30° — like a warm bath. This is the hottest month of the year in San Juan.
September	+31°	+24°	+30°	128 mm	Warm and comfortable: +31° by day, +24° at night. It's a rainy month (128 mm) — an umbrella is a must. 😊 light summer clothing. The sea is +30° — like a warm bath. Statistically the wettest month of the year.
October	+30°	+24°	+30°	114 mm	Gentle warmth — about +30° daytime, great walking weather. Frequent rain (114 mm over the month) — keep indoor backup plans. 😊 light summer clothing. The sea is +30° — like a warm bath. The sea is at its warmest of the year this month.
November	+29°	+23°	+29°	105 mm	A comfortable month: +29° by day without exhausting heat. One of the wettest months (105 mm): downpours can derail plans. 😊 light summer clothing. Water at +29° — great for swimming.
December	+28°	+22°	+28°	48 mm	Warm and comfortable: +28° by day, +22° at night. 😊 light summer clothing. Water at +28° — great for swimming. The shortest daylight of the year — it gets dark early.

When to visit San Juan

✅ Recommended time to visit

🌟 Best time: January, February, December

Daytime air+28…+28°

Sea temperature+27…+28°

Precipitationoften

Why: comfortable +28…+28° by day, little rain, warm sea (+27…28°).

⚠️ Doable, with caveats

🌤️ Shoulder season: March, April, June, July, August, November

Daytime air+29…+31°

Sea temperature+27…+30°

Precipitationoften

Why: noticeable rain risk (41–105 mm/month) — pack an umbrella and backup plans.

🔴 Not the best time

🌤️ Shoulder season: May, September, October

Daytime air+30…+31°

Sea temperature+28…+30°

Precipitationoften

Why: the rainy season (108–128 mm/month) — downpours almost daily.

Bottom line: the best time to visit San Juan is December – February, and the most comfortable months are January, February, December. The toughest months to visit are May, September, October: frequent rain.