World Resorts Northern Mariana Islands Guam Weather

Guam 7 Days Forecast

14.08
fri
Day
84°F
E 14 mph
Precip.
9%
Night
82°F
E 9 mph
Precip.
26%
15.08
sat
Day
84°F
NE 11 mph
Precip.
8%
Night
82°F
NE 12 mph
Precip.
21%
16.08
sun
Day
84°F
NE 15 mph
Precip.
13%
Night
81°F
E 11 mph
Precip.
73%
17.08
mon
Day
84°F
NE 13 mph
Precip.
20%
Night
81°F
NE 6 mph
Precip.
13%
18.08
tue
Day
84°F
S 5 mph
Precip.
9%
Night
82°F
NE 9 mph
Precip.
28%
19.08
wed
Day
82°F
NE 15 mph
Precip.
42%
Night
81°F
NE 12 mph
Precip.
62%
20.08
thu
Day
82°F
S 8 mph
Precip.
34%
Night
81°F
NE 13 mph
Precip.
66%

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August 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
August 5 days
September 5 days
Warmest months:
June 87.3 °F
July 87.1 °F
August 87.0 °F
Warmest sea temp:
August 85.5 °F
September 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
August 14 days
September 14 days
Windiest months:
February 17.3 mph
December 17.2 mph
January 16.5 mph

Guam on a weather map

Current weather
01:23
Guam
+82°F
NE 9 mph
Feels like: +90°F
Precip.: 49%
Places in Northern Mariana Islands:
Name
°F
Guam
+82°F
Rota
+81°F
Saipan
+82°F
Susupe
+82°F
Tinian
+82°F
24 Hours Forecast
Guam
Local time: 01:23
August 14, friday
0300
81°F
NE
11 mph
0600
81°F
NE
11 mph
0900
84°F
NE
13 mph
1200
84°F
E
14 mph
1500
84°F
E
14 mph
1800
84°F
E
11 mph
2100
82°F
E
9 mph
August 15, saturday
0000
82°F
E
9 mph
Units of measurement: °C / °F