Guam weather live forecast

Today's maximum temperature in Guam is expected to be 26°C. Select a day from the live weather forecast for Guam (Agana) for more weather parameters.

Wednesday
7th Oct
26

24

2

8
Thursday
8th Oct
28

25

3

9
Friday
9th Oct
29

25

5

11
Saturday
10th Oct
29

25

4

11
Sunday
11th Oct
29

26

5

11

5-day weather forecast updated at 04:00 on Wednesday 7th October 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 Wednesday 7th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 2 hours of bright sunshine. There are 30-40 mm of rainfall expected with 93% chance of some rain and a gentle breeze of 17 kph from the west.

26
°C maximum temperature
24
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
8
UV index (Very High)
93
% chance of some rain
<40
mm of rainfall expected
L
low heat & humidity
17
kph wind from W

Guam weather for Thursday 8th October 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 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 73% chance of some rain and a gentle breeze of 14 kph from the west.

28
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
9
UV index (Very High)
73
% chance of some rain
<30
mm of rainfall expected
M
moderate heat & humidity
14
kph wind from W

Guam weather for Friday 9th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 5 hours of bright sunshine. There are 20-30 mm of rainfall expected with 87% chance of some rain and a gentle breeze of 14 kph from the south-west.

29
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
11
UV index (Extreme)
87
% chance of some rain
<30
mm of rainfall expected
M
moderate heat & humidity
14
kph wind from SW

Guam weather for Saturday 10th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 91% chance of some rain and a gentle breeze of 19 kph from the south-west.

29
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
11
UV index (Extreme)
91
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
19
kph wind from SW

Guam weather for Sunday 11th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 5 hours of bright sunshine. There are 20-30 mm of rainfall expected with 84% chance of some rain and a gentle breeze of 18 kph from the south-west.