San Juan Weather Forecast
San Juan weather: 83°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
San Juan is a city in Puerto Rico. San Juan is known for Old San Juan forts and beaches. It has a population of about 340.000.
Right now it is 83°F (29°C) in San Juan with overcast. It feels like 90°F. Today runs from 81°F to 85°F. Chance of precipitation is 99%. Sightseeing conditions score 6.4/10 - fair - plan around the weather.
The best time to visit San Juan is January, March, May, June, July and December. The climate is temperate. February, October and November tend to be the least comfortable months. September is the warmest month with average highs near 87°F, while February is the coldest with lows near 73°F.
Nearby highlights include Virgin Islands National Park.
In plain terms. Today is about average for August. The forecast high of 85°F is in line with the 86°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. fishing is the strongest bet in San Juan today at 8.4/10. Wet roads are likely; braking distances roughly double in heavy rain.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Active alerts for San Juan
Heat Advisory issued August 23 at 3:27AM AST until August 23 at 4:00PM AST by NWS San Juan PR
Issued by NWS San Juan PR
Weather in San Juan right now
Source: Open-Meteo. Updated 8:06 AM, Aug 23 local time.
See the San Juan forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for San Juan
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Sat, Aug 22 | 🌦️ Drizzle | 85° / 81° | 99% · 0,1 in | 16 mph | 9 |
| Sun, Aug 23 | 🌦️ Light drizzle | 85° / 79° | 99% · 0,0 in | 16 mph | 8 |
| Mon, Aug 24 | 🌦️ Light drizzle | 87° / 79° | 43% · 0,0 in | 16 mph | 8 |
| Tue, Aug 25 | 🌦️ Light showers | 84° / 79° | 97% · 0,1 in | 24 mph | 9 |
| Wed, Aug 26 | 🌦️ Light drizzle | 86° / 81° | 53% · 0,0 in | 19 mph | 9 |
| Thu, Aug 27 | 🌦️ Light drizzle | 85° / 79° | 70% · 0,0 in | 17 mph | 9 |
| Fri, Aug 28 | 🌦️ Light drizzle | 86° / 81° | 59% · 0,0 in | 18 mph | 7 |
| Sat, Aug 29 | 🌦️ Light drizzle | 85° / 81° | 68% · 0,0 in | 15 mph | 9 |
| Sun, Aug 30 | 🌦️ Light drizzle | 85° / 81° | 74% · 0,1 in | 12 mph | 9 |
| Mon, Aug 31 | 🌦️ Drizzle | 83° / 79° | 84% · 0,2 in | 6 mph | 9 |
| Tue, Sep 1 | 🌦️ Light drizzle | 84° / 78° | 76% · 0,1 in | 4 mph | 9 |
| Wed, Sep 2 | 🌦️ Light drizzle | 86° / 79° | 67% · 0,0 in | 11 mph | 9 |
| Thu, Sep 3 | ☀️ Clear sky | 85° / 80° | 57% | 17 mph | 9 |
| Fri, Sep 4 | 🌦️ Light drizzle | 86° / 82° | 61% · 0,0 in | 14 mph | 9 |
| Sat, Sep 5 | 🌦️ Light drizzle | 86° / 80° | 66% · 0,1 in | 17 mph | 9 |
| Sun, Sep 6 | 🌦️ Light drizzle | 95° / 78° | 32% · 0,1 in | 15 mph | 9 |
Climate in San Juan month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 81° | 74° | 2,2 in | ★★★★☆ |
| February | 81° | 73° | 4,6 in | ★★★★☆ |
| March | 81° | 74° | 3,0 in | ★★★★☆ |
| April | 82° | 74° | 4,8 in | ★★★★☆ |
| May | 84° | 77° | 3,4 in | ★★★★☆ |
| June | 85° | 79° | 2,4 in | ★★★★☆ |
| July | 85° | 79° | 2,4 in | ★★★★☆ |
| August | 86° | 79° | 3,8 in | ★★★★☆ |
| September | 87° | 79° | 4,0 in | ★★★★☆ |
| October | 87° | 78° | 5,0 in | ★★★☆☆ |
| November | 84° | 77° | 5,3 in | ★★★☆☆ |
| December | 82° | 75° | 3,4 in | ★★★★☆ |
Climate type: Temperate. Source: Open-Meteo archive (ERA5).
Weather map for San Juan
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in San Juan
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit San Juan
Go in January, March, May, June, July and December. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: February, October and November - expect the least comfortable mix of heat, cold or rain.
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 83°F (29°C) with overcast. Humidity is 77% and wind is 11 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 8:06 AM.
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 23, 2026 at 8:06 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
