Guam weather live forecast

Today's maximum temperature in Guam is expected to be 30°C. Select a day from the live weather forecast for Guam (Agana) for more weather parameters.

Tuesday
20th Jan
30

26

7

10
Wednesday
21st Jan
29

26

3

8
Thursday
22nd Jan
29

26

5

4
Friday
23rd Jan
29

26

4

2

5-day weather forecast updated at 04:00 on Saturday 17th January 2026 GMT

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The 5-day weather forecast for Guam, represented by Agana, (Agana) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Guam weather forecast by day

Below are the detailed weather forecasts for Guam for the next 5 days. The forecasts shown are for Agana and may not represent the whole of Guam. Browse more destinations in Guam to view more weather forecasts.

Guam weather for Tuesday 20th January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 40% chance of some rain and a light breeze of 10 kph from the east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
10
UV index (Very High)
40
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
10
kph wind from E

Guam weather for Wednesday 21st January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 58% chance of some rain and a gentle breeze of 13 kph from the north-east.

29
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
8
UV index (Very High)
58
% chance of some rain
<30
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from NE

Guam weather for Thursday 22nd January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 20-30 mm of rainfall expected with 91% chance of some rain and a gentle breeze of 18 kph from the east.

29
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
4
UV index (Moderate)
91
% chance of some rain
<30
mm of rainfall expected
M
moderate heat & humidity
18
kph wind from E

Guam weather for Friday 23rd January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 30-40 mm of rainfall expected with 95% chance of some rain and a gentle breeze of 18 kph from the east.