Guam Weather Forecast
Guam weather: 82°F, clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Air quality and pollen in Guam
Air quality: Open-Meteo (CAMS). US AQI scale.
Health and safety today
| Skin and UV | No protection needed for most skin types. |
|---|---|
| Heat stress | The heat index is 88°F, higher than the air temperature because humidity is 79%. Sweat evaporates slowly, so drink before you feel thirsty and take shade breaks. |
| Pets | Pavement can be 20°C hotter than the air. Walk dogs early or late, never leave animals in cars, and carry water. |
| Older adults | Heat builds up slowly indoors. Check on anyone over 65 living alone and keep rooms ventilated. |
| Children | Small bodies overheat faster than adults. Shade, hats and frequent drinks; skip midday sport. |
Weather in Guam right now
Source: Open-Meteo. Updated 9:15 AM, Oct 22 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 82°F (28°C) with clear. Humidity is 79% and wind is 8 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 9:15 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 October 22, 2026 at 9:15 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
