San Juan Weather Forecast
San Juan weather: 82°F, mainly clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Will it rain in San Juan?
No - rain is unlikely in San Juan today.
Rain is very unlikely today - plans do not need a backup.
Over the next 7 days, about 0,5 in of precipitation is forecast, with the wettest days falling on Sat, Sun, Mon, Tue, Wed and Thu.
Rainfall over the next 7 days is close to normal for August (0,5 in against a typical 0,9 in).
16-day forecast for San Juan
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Aug 21 | 🌦️ Light drizzle | 85° / 82° | 4% · 0,0 in | 16 mph | 9 |
| Sat, Aug 22 | 🌦️ Light drizzle | 85° / 80° | 73% · 0,1 in | 17 mph | 8 |
| Sun, Aug 23 | ⛈️ Thunderstorm | 86° / 80° | 77% · 0,1 in | 16 mph | 9 |
| Mon, Aug 24 | 🌦️ Light drizzle | 85° / 80° | 58% · 0,0 in | 17 mph | 9 |
| Tue, Aug 25 | ⛈️ Thunderstorm | 86° / 77° | 89% · 0,3 in | 16 mph | 9 |
| Wed, Aug 26 | ⛅ Partly cloudy | 86° / 80° | 49% | 16 mph | 8 |
| Thu, Aug 27 | 🌦️ Light drizzle | 84° / 81° | 68% · 0,0 in | 17 mph | 9 |
| Fri, Aug 28 | 🌦️ Light drizzle | 85° / 81° | 76% · 0,1 in | 16 mph | 9 |
| Sat, Aug 29 | 🌦️ Drizzle | 83° / 81° | 81% · 0,2 in | 17 mph | 9 |
| Sun, Aug 30 | 🌦️ Light drizzle | 84° / 81° | 67% · 0,1 in | 12 mph | 9 |
| Mon, Aug 31 | ☀️ Clear sky | 84° / 79° | 93% | 8 mph | 7 |
| Tue, Sep 1 | 🌦️ Light drizzle | 83° / 76° | 74% · 0,0 in | 5 mph | 9 |
| Wed, Sep 2 | 🌦️ Drizzle | 83° / 78° | 42% · 0,1 in | 10 mph | 7 |
| Thu, Sep 3 | 🌦️ Light drizzle | 86° / 77° | 44% · 0,1 in | 15 mph | 9 |
| Fri, Sep 4 | ☁️ Overcast | 86° / 78° | 25% | 16 mph | 9 |
| Sat, Sep 5 | ☀️ Clear sky | -- / -- | 34% | -- | — |
What this means for San Juan
Today is about average for August. The forecast high of 85°F is in line with the 86°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 38°F - an unusually even climate through the year.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 6 of the next 7 days carry a real chance of rain
- If your dates are flexible, avoid February, October and November - historically the least comfortable months here.
See the San Juan forecast by time range
San Juan weather - more answers
Explore San Juan
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is San Juan?
San Juan is a city in Puerto Rico. Its coordinates are 18.4655, -66.1057. It lies in North America.
What is the weather like in San Juan right now?
It is currently 82°F (28°C) with mainly clear. Humidity is 76% and wind is 10 mph.
When is the best time to visit San Juan?
January, March, May, June, July and December offer the most comfortable conditions in San Juan, which has a temperate climate. February, October and November are usually the hardest months for outdoor plans.
What time zone is San Juan in?
San Juan observes America/Puerto_Rico (UTC-04:00). The local time is 2:57 PM.
How many people live in San Juan?
San Juan has a population of approximately 340.000.
What are the top things to do in San Juan?
Popular options include Virgin Islands National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (cities-world) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 21, 2026 at 2:57 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
