Weather in San Juan
Puerto Rico 18.47° N, 66.11° W local time now
Weather in San Juan
Loading current weather for San Juan.
Current weather for San Juan is unavailable right now. Everything else on this page — local time, time zone rules, sunrise and sunset — is computed locally and unaffected.
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Feels like
- Today's high / low
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- Humidity
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- Wind
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- Tomorrow
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Measured · source Open-Meteo · cached for 30 minutes
Daylight in San Juan today
July 30, 2026 · computed from 18.4655°, -66.1057° — exact regardless of what loads above.
Sunrise
6:01 AM
Sunset
7:00 PM
Day length
12h 58m
Solar noon
12:30 PM
Sun at its highest
Civil twilight runs from 5:38 AM to sunrise in the morning and from sunset to 7:23 PM in the evening — the period when there is usable light without the sun being up.
Location and time
- Coordinates
- 18.4655° N, 66.1057° W
- Latitude band
- tropical, northern hemisphere
- Time zone
- America/Puerto_Rico
- Offset now
- UTC-4 (AST)
- Daylight saving time
- Not observed
- Day length across the year
- 11h 01m – 13h 14m
We publish only what we can source or compute. There is no climate summary here because we have no licensed climate dataset — see data sources.
Frequently asked questions
What time is it in San Juan while I read this?
San Juan uses America/Puerto_Rico, currently UTC-4 (AST). The current local time, with seconds, is on the San Juan time page — worth checking before you call, since a forecast for "tomorrow" there may still be today where you are.
Where does this weather data come from?
Open-Meteo, requested by your browser when you open this page. It needs no account or API key, so nothing about you is sent to us or to them beyond the coordinates of San Juan. Readings are cached in your browser for 30 minutes and always labelled with the time they were taken.
Why are sunrise and sunset here but the temperature has to load?
Because they are different kinds of fact. Sunrise and sunset follow from San Juan's latitude and longitude and the date, so we compute them locally and they are correct whether or not anything loads. Temperature is an observation — it has to come from someone measuring it, which means a network request that can fail.
How much does daylight vary in San Juan through the year?
Between about 11h 01m and 13h 14m. At 18.5° this is a tropical location in the northern hemisphere, so the swing between the solstices is pronounced.