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.
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 82°F (28°C) in San Juan with mainly clear. It feels like 88°F. Today runs from 80°F to 90°F. Chance of precipitation is 63%. Sightseeing conditions score 7.6/10 - good conditions.
The best time to visit San Juan is January, March, May, June, July, September and December. The climate is temperate. August, October and November tend to be the least comfortable months. October 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 slightly warmer than average for October. The forecast high of 90°F is 3.4°F above the 87°F typical for this month. The best window to be outside is roughly 6 PM to 9 PM, when temperature, rain chance and wind line up best. family time is the strongest bet in San Juan today at 7.9/10. 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
High Surf Advisory issued October 26 at 5:51PM AST until October 27 at 6:00AM AST by NWS San Juan PR
Issued by NWS San Juan PR
Rip Current Statement issued October 26 at 5:51PM AST until October 28 at 6:00AM AST by NWS San Juan PR
Issued by NWS San Juan PR
Weather in San Juan right now
Source: Open-Meteo. Updated 6:57 PM, Oct 26 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 |
|---|---|---|---|---|---|
| Sun, Oct 25 | ☁️ Overcast | 90° / 80° | 63% | 12 mph | 7 |
| Mon, Oct 26 | ☁️ Overcast | 89° / 79° | 75% | 12 mph | 8 |
| Tue, Oct 27 | 🌦️ Drizzle | 89° / 79° | 69% · 0,0 in | 12 mph | 7 |
| Wed, Oct 28 | ⛈️ Thunderstorm | 87° / 78° | 47% · 0,2 in | 11 mph | 7 |
| Thu, Oct 29 | ☀️ Clear sky | 87° / 78° | 47% | 13 mph | 7 |
| Fri, Oct 30 | 🌦️ Light drizzle | 85° / 76° | 63% · 0,1 in | 15 mph | 7 |
| Sat, Oct 31 | ⛈️ Thunderstorm | 84° / 76° | 65% · 0,3 in | 14 mph | 6 |
| Sun, Nov 1 | 🌦️ Light drizzle | 85° / 79° | 80% · 0,1 in | 10 mph | 7 |
| Mon, Nov 2 | 🌦️ Drizzle | 85° / 77° | 80% · 0,2 in | 12 mph | 7 |
| Tue, Nov 3 | 🌦️ Drizzle | 86° / 75° | 87% · 0,2 in | 8 mph | 7 |
| Wed, Nov 4 | 🌦️ Drizzle | 82° / 76° | 82% · 0,3 in | 4 mph | 7 |
| Thu, Nov 5 | 🌦️ Light drizzle | 82° / 75° | 85% · 0,1 in | 8 mph | 7 |
| Fri, Nov 6 | 🌦️ Light drizzle | 83° / 75° | 87% · 0,1 in | 7 mph | 7 |
| Sat, Nov 7 | 🌦️ Light drizzle | 83° / 75° | 67% · 0,0 in | 6 mph | 7 |
| Sun, Nov 8 | 🌦️ Light drizzle | 82° / 74° | 81% · 0,1 in | 4 mph | 7 |
| Mon, Nov 9 | 🌦️ Light showers | 87° / 74° | 48% · 0,3 in | 5 mph | 6 |
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° | 80° | 4,6 in | ★★★★☆ |
| September | 86° | 79° | 3,1 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, September and December. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: August, 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 82°F (28°C) with mainly clear. Humidity is 81% and wind is 10 mph.
When is the best time to visit San Juan?
January, March, May, June, July, September and December offer the most comfortable conditions in San Juan, which has a temperate climate. August, 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 6:57 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 October 26, 2026 at 6:57 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
