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.

Monday
5th Jan
30

26

6

9
Tuesday
6th Jan
28

25

4

8
Wednesday
7th Jan
29

25

3

7
Thursday
8th Jan
29

25

7

8
Friday
9th Jan
30

26

6

9

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

Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 26% chance of some rain and a gentle breeze of 18 kph from the east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
9
UV index (Very High)
26
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
18
kph wind from E

Guam weather for Tuesday 6th January 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 63% chance of some rain and a gentle breeze of 13 kph from the east.

28
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
8
UV index (Very High)
63
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
13
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 7 (High) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 69% chance of some rain and a moderate breeze of 20 kph from the east.

29
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
7
UV index (High)
69
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
20
kph wind from E

Guam weather for Thursday 8th January 2026

Expect broken clouds in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the north-east.

29
°C maximum temperature
25
°C minimum temperature
broken clouds
7
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
21
kph wind from NE

Guam weather for Friday 9th January 2026

Expect broken clouds in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 27 kph from the north-east.