Guam weather live forecast

Today's maximum temperature in Guam is expected to be 29°C. Select a day from the live weather forecast for Guam (Agana) for more weather parameters.

Wednesday
31st Dec
29

26

6

8
Thursday
1st Jan
29

26

6

8
Friday
2nd Jan
29

26

6

8
Saturday
3rd Jan
29

25

7

9
Sunday
4th Jan
29

25

6

9

5-day weather forecast updated at 04:00 on Tuesday 30th December 2025 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 Wednesday 31st December 2025

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 50% chance of some rain and a moderate breeze of 20 kph from the east.

29
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
8
UV index (Very High)
50
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
20
kph wind from E

Guam weather for Thursday 1st 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 44% chance of some rain and a gentle breeze of 18 kph from the east.

29
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
8
UV index (Very High)
44
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
18
kph wind from E

Guam weather for Friday 2nd 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 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the east.

29
°C maximum temperature
26
°C minimum temperature
broken clouds
6
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
16
kph wind from E

Guam weather for Saturday 3rd January 2026

Expect scattered clouds in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the east.

29
°C maximum temperature
25
°C minimum temperature
scattered clouds
7
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
8
kph wind from E

Guam weather for Sunday 4th January 2026

Expect scattered clouds 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 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-east.