National Weather Service Forecast for: San Juan, Puerto Rico
| National Weather Service Forecast for:
San Juan PR Issued by: National Weather Service San Juan, PR |
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| Updated: 4:31 am AST Sep 8, 2026 | ||||||||||||||||||
| San Juan | ||||||||||||||||||
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| Today |
Scattered showers. Partly sunny, with a high near 89. Heat index values as high as 104. East wind 11 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. |
| Tonight |
Scattered showers. Mostly cloudy, with a low around 80. East wind 9 to 11 mph. Chance of precipitation is 40%. |
| Wednesday |
Scattered showers and thunderstorms. Partly sunny, with a high near 87. East wind 13 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible. |
| Wednesday Night |
Scattered showers. Mostly cloudy, with a low around 80. East wind around 11 mph. Chance of precipitation is 40%. |
| Thursday |
Scattered showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 89. East wind 13 to 18 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. |
| Thursday Night |
Isolated showers. Widespread haze. Partly cloudy, with a low around 79. East wind 9 to 11 mph. Chance of precipitation is 20%. |
| Friday |
Scattered showers, mainly before noon. Widespread haze after noon. Mostly sunny, with a high near 90. East wind 11 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 30%. |
| Friday Night |
Widespread haze. Mostly clear, with a low around 79. East wind around 10 mph. |
| Saturday |
Widespread haze. Sunny, with a high near 90. East northeast wind 11 to 16 mph. |
| Saturday Night |
Scattered showers. Partly cloudy, with a low around 80. Chance of precipitation is 30%. |
| Sunday |
Scattered showers. Mostly sunny, with a high near 90. Chance of precipitation is 30%. |
| Sunday Night |
Mostly clear, with a low around 79. |
| Monday |
Scattered showers. Mostly sunny, with a high near 91. Chance of precipitation is 30%. |
| Heat Advisory | Today High: 89 °F | Tonight Low: 80 °F | Wednesday High: 87 °F | Wednesday Night Low: 80 °F | Thursday High: 89 °F | Thursday Night  Low: 79 °F | Friday High: 90 °F | Friday Night  Low: 79 °F | Saturday High: 90 °F |
| Scattered Showers | Scattered Showers | Scattered Showers | Scattered Showers | Showers Likely | Isolated Showers | Scattered Showers then Haze | Haze | Haze |
National Weather Service Forecast Details