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
4th Jan
30

25

7

7
Monday
5th Jan
28

25

5

9
Tuesday
6th Jan
29

25

3

8
Wednesday
7th Jan
29

25

6

8
Thursday
8th Jan
29

26

6

8

5-day weather forecast updated at 04:00 on Sunday 4th 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 4th January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 75% chance of some rain and a gentle breeze of 19 kph from the north-east.

30
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
7
UV index (High)
75
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
19
kph wind from NE

Guam weather for Monday 5th January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 41% chance of some rain and a gentle breeze of 17 kph from the east.

28
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
9
UV index (Very High)
41
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
17
kph wind from E

Guam weather for Tuesday 6th 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 2-5 mm of rainfall expected with 61% chance of some rain and a gentle breeze of 18 kph from the east.

29
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
8
UV index (Very High)
61
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
18
kph wind from E

Guam weather for Wednesday 7th 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 2-5 mm of rainfall expected with 59% chance of some rain and a gentle breeze of 19 kph from the east.

29
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
8
UV index (Very High)
59
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
19
kph wind from E

Guam weather for Thursday 8th 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 0-2 mm of rainfall expected with 56% chance of some rain and a gentle breeze of 19 kph from the east.