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.

Sunday
11th Jan
30

26

6

8
Monday
12th Jan
29

26

6

8
Tuesday
13th Jan
29

26

5

8
Wednesday
14th Jan
29

26

5

9
Thursday
15th Jan
29

26

6

9

5-day weather forecast updated at 04:00 on Friday 9th 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 Sunday 11th January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 51% chance of some rain and a moderate breeze of 27 kph from the east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
8
UV index (Very High)
51
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
27
kph wind from E

Guam weather for Monday 12th 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 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 74% chance of some rain and a moderate breeze of 24 kph from the east.

29
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
8
UV index (Very High)
74
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
24
kph wind from E

Guam weather for Tuesday 13th 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 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 68% chance of some rain and a moderate breeze of 27 kph from the east.

29
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
8
UV index (Very High)
68
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
27
kph wind from E

Guam weather for Wednesday 14th January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 5 hours of bright sunshine. There are 5-10 mm of rainfall expected with 77% chance of some rain and a moderate breeze of 26 kph from the east.

29
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
9
UV index (Very High)
77
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
26
kph wind from E

Guam weather for Thursday 15th January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 10-20 mm of rainfall expected with 74% chance of some rain and a moderate breeze of 23 kph from the east.