Current Conditions

San Juan, San Juan

79°F26°C

Showers

Wind

ESE 3 mph4 km/h

Humidity

91%

Cloud Cover

57%

As of Tuesday, September 22, 2026 at 2:47 AM AST

Today's Outlook

Day

Mostly cloudy and hot, with a high of 87°F30°C and morning low of 81°F27°C — feels like 95°F35°C. Light wind from the ESE around 6 mph9 km/h. 92% chance of showers throughout the day. Heat risk in the afternoon.

Night

Partly cloudy, with a low around 78°F25°C. Light wind from the ESE around 4 mph6 km/h. 27% chance of drizzle in the evening.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Showers	High 87°F30°CFeels 95°F35°C	Low 78°F25°C	Precip 0.14 in3.6 mm92%	Cloud 44%	Wind ESE 5 mph7 km/h	Tuesday: Mostly cloudy and hot, with a high of 87°F30°C and morning low of 81°F27°C — feels like 95°F35°C. Light wind from the ESE around 6 mph9 km/h. 92% chance of showers throughout the day. Heat risk in the afternoon. Tuesday Night: Partly cloudy, with a low around 78°F25°C. Light wind from the ESE around 4 mph6 km/h. 27% chance of drizzle in the evening.
Showers	High 87°F31°CFeels 97°F36°C	Low 78°F25°C	Precip 0.14 in3.5 mm87%	Cloud 33%	Wind ESE 5 mph8 km/h	Wednesday: Partly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the ESE at 6 to 7 mph9 to 11 km/h. 87% chance of showers throughout the day. Heat risk in the afternoon. Wednesday Night: Partly cloudy, with a low around 78°F25°C. Light wind from the E around 4 mph6 km/h. 49% chance of drizzle throughout the night.
Showers	High 87°F30°CFeels 97°F36°C	Low 77°F25°C	Precip 0.17 in4.2 mm94%	Cloud 36%	Wind SE 4 mph7 km/h	Thursday: Partly cloudy and hot, with a high of 87°F30°C and morning low of 80°F27°C — feels like 97°F36°C. Light wind from the SE around 5 mph9 km/h. 94% chance of showers throughout the day. Heat risk in the afternoon. Thursday Night: Partly cloudy, with a low around 77°F25°C. Light wind from the ESE around 3 mph5 km/h. 18% chance of drizzle throughout the night.
Showers	High 88°F31°CFeels 97°F36°C	Low 76°F25°C	Precip 0.07 in1.8 mm64%	Cloud 30%	Wind SE 4 mph6 km/h	Friday: Partly cloudy and hot, with a high of 88°F31°C and morning low of 80°F27°C — feels like 97°F36°C. Breezy from the SE at 5 to 7 mph9 to 11 km/h. 64% chance of showers throughout the day. Heat risk in the afternoon. Friday Night: Partly cloudy, with a low around 76°F25°C. Light wind from the SE around 2 mph4 km/h. 20% chance of drizzle overnight.
Showers	High 88°F31°CFeels 97°F36°C	Low 76°F25°C	Precip 0.05 in1.2 mm47%	Cloud 38%	Wind ESE 4 mph6 km/h	Saturday: Partly cloudy and hot, with a high of 88°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Light wind from the SE around 5 mph8 km/h. 47% chance of showers throughout the day. Heat risk in the afternoon. Saturday Night: Partly cloudy, with a low around 76°F25°C. Light wind from the ESE around 3 mph5 km/h.
Showers	High 87°F31°CFeels 97°F36°C	Low 77°F25°C	Precip 0.12 in3.1 mm74%	Cloud 50%	Wind E 5 mph8 km/h	Sunday: Mostly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the ESE at 6 to 8 mph10 to 12 km/h. 74% chance of showers throughout the day. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 77°F25°C. Light wind from the E around 4 mph6 km/h. 16% chance of drizzle in the evening.
Showers	High 87°F31°CFeels 98°F36°C	Low 78°F25°C	Precip 0.1 in2.5 mm74%	Cloud 63%	Wind E 6 mph9 km/h	Monday: Mostly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the E at 7 to 8 mph11 to 13 km/h. 74% chance of showers throughout the day. Heat risk in the afternoon. Monday Night: Mostly cloudy, with a low around 78°F25°C. Light wind from the E around 4 mph7 km/h. 20% chance of drizzle in the evening.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 22	87°F30°C Feels 95°F35°C	78°F25°C	0.14 in3.6 mm· 92%	44%	Showers	ESE 5 mph7 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 81°F27°C — feels like 95°F35°C. Light wind from the ESE around 6 mph9 km/h. 92% chance of showers throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 78°F25°C. Light wind from the ESE around 4 mph6 km/h. 27% chance of drizzle in the evening.
	WednesdaySep 23	87°F31°C Feels 97°F36°C	78°F25°C	0.14 in3.5 mm· 87%	33%	Showers	ESE 5 mph8 km/h
DayPartly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the ESE at 6 to 7 mph9 to 11 km/h. 87% chance of showers throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 78°F25°C. Light wind from the E around 4 mph6 km/h. 49% chance of drizzle throughout the night.
	ThursdaySep 24	87°F30°C Feels 97°F36°C	77°F25°C	0.17 in4.2 mm· 94%	36%	Showers	SE 4 mph7 km/h
DayPartly cloudy and hot, with a high of 87°F30°C and morning low of 80°F27°C — feels like 97°F36°C. Light wind from the SE around 5 mph9 km/h. 94% chance of showers throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 77°F25°C. Light wind from the ESE around 3 mph5 km/h. 18% chance of drizzle throughout the night.
	FridaySep 25	88°F31°C Feels 97°F36°C	76°F25°C	0.07 in1.8 mm· 64%	30%	Showers	SE 4 mph6 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 80°F27°C — feels like 97°F36°C. Breezy from the SE at 5 to 7 mph9 to 11 km/h. 64% chance of showers throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 76°F25°C. Light wind from the SE around 2 mph4 km/h. 20% chance of drizzle overnight.
	SaturdaySep 26	88°F31°C Feels 97°F36°C	76°F25°C	0.05 in1.2 mm· 47%	38%	Showers	ESE 4 mph6 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Light wind from the SE around 5 mph8 km/h. 47% chance of showers throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 76°F25°C. Light wind from the ESE around 3 mph5 km/h.
	SundaySep 27	87°F31°C Feels 97°F36°C	77°F25°C	0.12 in3.1 mm· 74%	50%	Showers	E 5 mph8 km/h
DayMostly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the ESE at 6 to 8 mph10 to 12 km/h. 74% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 77°F25°C. Light wind from the E around 4 mph6 km/h. 16% chance of drizzle in the evening.
	MondaySep 28	87°F31°C Feels 98°F36°C	78°F25°C	0.1 in2.5 mm· 74%	63%	Showers	E 6 mph9 km/h
DayMostly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the E at 7 to 8 mph11 to 13 km/h. 74% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 78°F25°C. Light wind from the E around 4 mph7 km/h. 20% chance of drizzle in the evening.
	TuesdaySep 29	87°F31°C Feels 97°F36°C	77°F25°C	0.11 in2.8 mm· 82%	68%	Showers	E 6 mph10 km/h
DayMostly cloudy and hot, with a high of 87°F31°C and morning low of 81°F27°C — feels like 97°F36°C. Breezy from the E at 7 to 8 mph12 to 14 km/h. 82% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 77°F25°C. Light wind from the E around 5 mph7 km/h. 22% chance of drizzle throughout the night.
	WednesdaySep 30	87°F30°C Feels 97°F36°C	77°F25°C	0.1 in2.6 mm· 79%	56%	Showers	E 7 mph11 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 80°F27°C — feels like 97°F36°C. Breezy from the E at 8 to 9 mph13 to 15 km/h. 79% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 77°F25°C. Light wind from the E around 5 mph8 km/h. 28% chance of drizzle throughout the night.
	ThursdayOct 1	86°F30°C Feels 96°F36°C	77°F25°C	0.12 in3 mm· 89%	55%	Showers	E 7 mph11 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 80°F27°C — feels like 97°F36°C. Breezy from the E at 8 to 9 mph13 to 15 km/h. 89% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 77°F25°C. Light wind from the E around 5 mph8 km/h. 30% chance of drizzle throughout the night.
	FridayOct 2	87°F30°C Feels 96°F36°C	77°F25°C	0.14 in3.5 mm· 78%	64%	Showers	ESE 6 mph9 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 80°F27°C — feels like 97°F36°C. Breezy from the ESE at 7 to 8 mph11 to 13 km/h. 78% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 77°F25°C. Light wind from the E around 4 mph7 km/h. 27% chance of drizzle throughout the night.
	SaturdayOct 3	86°F30°C Feels 95°F35°C	77°F25°C	0.15 in3.9 mm· 84%	63%	Showers	E 5 mph8 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 80°F27°C — feels like 95°F35°C. Breezy from the ESE at 6 to 7 mph10 to 12 km/h. 84% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 77°F25°C. Light wind from the E around 4 mph6 km/h. 25% chance of drizzle throughout the night.
	SundayOct 4	86°F30°C Feels 95°F35°C	76°F25°C	0.16 in4 mm· 82%	59%	Showers	ESE 5 mph8 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 80°F27°C — feels like 95°F35°C. Light wind from the ESE around 6 mph9 km/h. 82% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 76°F25°C. Light wind from the E around 4 mph6 km/h. 20% chance of drizzle in the evening.
	MondayOct 5	87°F30°C Feels 96°F36°C	76°F25°C	0.16 in4 mm· 81%	58%	Showers	ESE 4 mph7 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 80°F27°C — feels like 97°F36°C. Light wind from the ESE around 6 mph9 km/h. 81% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 76°F25°C. Light wind from the E around 3 mph5 km/h. 30% chance of drizzle before dawn.
	TuesdayOct 6	87°F30°C Feels 96°F36°C	76°F25°C	0.17 in4.4 mm· 86%	60%	Showers	ESE 4 mph7 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 80°F27°C — feels like 97°F36°C. Light wind from the ESE around 5 mph8 km/h. 86% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 76°F25°C. Light wind from the ESE around 3 mph5 km/h. 33% chance of drizzle in the evening.

Nearby Cities

Cataño2 mi3 km Levittown5 mi8 km Bayamón6 mi9 km Guaynabo8 mi12 km Candelaria8 mi13 km Trujillo Alto10 mi16 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 18.4663°N, 66.1057°W·Elevation: 7m·Timezone: America/Puerto_Rico·Population: 418,140