Guam Weather Forecast
Guam weather: 80°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Next 48 hours
Hour-by-hour temperature, precipitation chance and wind.
Best time to go outside today
7 AM - 10 AM · comfort score 5/10
The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best.
Weather in Guam right now
Source: Open-Meteo. Updated 9:07 AM, Aug 23 local time.
See the Guam forecast by time range
Guam weather - more answers
Explore Guam
Every topic we hold for this place, and the same topic for the places around it.
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Frequently asked questions
Where is Guam?
Guam is a country in Oceania. Its coordinates are 13.4443, 144.7937. It lies in Oceania.
What is the weather like in Guam right now?
It is currently 80°F (27°C) with overcast. Humidity is 89% and wind is 12 mph.
When is the best time to visit Guam?
January, February and December offer the most comfortable conditions in Guam, which has a tropical climate. July, August and September are usually the hardest months for outdoor plans.
What time zone is Guam in?
Guam observes Pacific/Guam (UTC+10:00). The local time is 9:07 AM.
How many people live in Guam?
Guam has a population of approximately 170.000.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (countries-v1) - 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. |
| 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 9:07 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
