World Resorts Northern Mariana Islands Guam Weather

Guam 14 Days Forecast

30.08
sun
Day
82°F
SE 11 mph
Precip.
36%
Night
79°F
E 14 mph
Precip.
61%
31.08
mon
Day
79°F
E 11 mph
Precip.
70%
Night
79°F
E 12 mph
Precip.
63%
01.09
tue
Day
81°F
E 15 mph
Precip.
73%
Night
79°F
SE 9 mph
Precip.
69%
02.09
wed
Day
81°F
SE 19 mph
Precip.
45%
Night
81°F
E 14 mph
Precip.
63%
03.09
thu
Day
81°F
NE 22 mph
Precip.
55%
Night
81°F
NE 18 mph
Precip.
52%
04.09
fri
Day
82°F
NE 22 mph
Precip.
31%
Night
82°F
NE 17 mph
Precip.
59%
05.09
sat
Day
84°F
NE 17 mph
Precip.
38%
Night
82°F
E 17 mph
Precip.
57%
06.09
sun
Day
82°F
E 19 mph
Precip.
55%
Night
82°F
NE 16 mph
Precip.
47%
07.09
mon
Day
82°F
NE 20 mph
Precip.
25%
Night
82°F
NE 16 mph
Precip.
53%
08.09
tue
Day
84°F
NE 20 mph
Precip.
21%
Night
82°F
NE 22 mph
Precip.
43%
09.09
wed
Day
82°F
NE 24 mph
Precip.
63%
Night
81°F
NE 27 mph
Precip.
61%
10.09
thu
Day
81°F
NE 25 mph
Precip.
74%
Night
81°F
NE 25 mph
Precip.
60%
11.09
fri
Day
82°F
NE 29 mph
Precip.
65%
Night
81°F
NE 27 mph
Precip.
64%
12.09
sat
Day
82°F
NE 27 mph
Precip.
43%
Night
82°F
NE 25 mph
Precip.
34%

Sea water temperature in August, °F

Show year:
2026
2025
2024

The average sea water temperature in August of 2026 was 84.7°F. The highest and lowest sea temperatures during the month were 85.8°F and 84.0°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 85.0°F. The highest and lowest sea temperatures during the month were 85.8°F and 84.0°F.

Air temperature in Guam, °F

Precipitation total in Guam, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Guam

Sunniest months:
July 5 days
September 5 days
May 4 days
Warmest months:
June 87.3 °F
July 87.1 °F
August 86.8 °F
Warmest sea temp:
September 85.4 °F
August 85.4 °F
July 85.3 °F
Coldest months:
February 83.1 °F
January 83.8 °F
March 84.0 °F
Rainiest months:
October 15 days
September 14 days
July 13 days
Windiest months:
February 17.3 mph
December 17.2 mph
January 16.5 mph

Guam on a weather map

Current weather
20:12
Guam
+79°F
SE 16 mph
Feels like: +84°F
Precip.: 26%
Places in Northern Mariana Islands:
Name
°F
Guam
+79°F
Rota
+79°F
Saipan
+82°F
Susupe
+82°F
Tinian
+82°F
24 Hours Forecast
Guam
Local time: 20:12
August 30, sunday
2100
79°F
SE
16 mph
August 31, monday
0000
79°F
E
14 mph
0300
79°F
E
12 mph
0600
79°F
E
12 mph
0900
79°F
E
11 mph
1200
79°F
E
11 mph
1500
81°F
E
14 mph
1800
79°F
E
14 mph
Units of measurement: °C / °F