Guam weather live forecast

Today's maximum temperature in Guam is expected to be 31°C. Select a day from the live weather forecast for Guam (Agana) for more weather parameters.

Friday
16th Oct
31

26

8

10
Saturday
17th Oct
30

26

5

9
Sunday
18th Oct
28

25

0

7
Monday
19th Oct
29

25

3

7
Tuesday
20th Oct
29

26

6

10

5-day weather forecast updated at 04:00 on Friday 16th 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 Friday 16th October 2026

Expect broken clouds in Guam with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-east.

31
°C maximum temperature
26
°C minimum temperature
broken clouds
8
hours of sunshine
10
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
14
kph wind from NE

Guam weather for Saturday 17th October 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 5 hours of bright sunshine. There are 10-20 mm of rainfall expected with 91% chance of some rain and a moderate breeze of 28 kph from the north.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
9
UV index (Very High)
91
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
28
kph wind from N

Guam weather for Sunday 18th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 7 (High) and no hours of bright sunshine. There are 50 mm or more of rainfall expected with 93% chance of some rain and a strong breeze of 51 kph from the south.

28
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
7
UV index (High)
93
% chance of some rain
>50
mm or more of rainfall expected
L
low heat & humidity
51
kph wind from S

Guam weather for Monday 19th October 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 20-30 mm of rainfall expected with 82% chance of some rain and a fresh breeze of 35 kph from the south.

29
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
7
UV index (High)
82
% chance of some rain
<30
mm of rainfall expected
M
moderate heat & humidity
35
kph wind from S

Guam weather for Tuesday 20th October 2026

Expect isolated thunderstorms in Guam with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 6 hours of bright sunshine. There are 10-20 mm of rainfall expected with 85% chance of some rain and a moderate breeze of 22 kph from the south-east.