10.08
mon
mon
Day
84°F
E 17 mph
Precip.
32%
32%
Night
82°F
E 14 mph
Precip.
64%
64%
11.08
tue
tue
Day
84°F
E 19 mph
Precip.
18%
18%
Night
82°F
NE 16 mph
Precip.
48%
48%
12.08
wed
wed
Day
84°F
NE 21 mph
Precip.
11%
11%
Night
82°F
NE 13 mph
Precip.
22%
22%
13.08
thu
thu
Day
84°F
NE 14 mph
Precip.
8%
8%
Night
82°F
NE 9 mph
Precip.
11%
11%
14.08
fri
fri
Day
86°F
E 15 mph
Precip.
18%
18%
Night
82°F
E 9 mph
Precip.
23%
23%
15.08
sat
sat
Day
86°F
NE 11 mph
Precip.
23%
23%
Night
82°F
NE 9 mph
Precip.
16%
16%
16.08
sun
sun
Day
84°F
E 12 mph
Precip.
51%
51%
Night
82°F
SE 12 mph
Precip.
63%
63%
17.08
mon
mon
Day
84°F
SE 7 mph
Precip.
46%
46%
Night
82°F
S 7 mph
Precip.
20%
20%
18.08
tue
tue
Day
84°F
S 9 mph
Precip.
13%
13%
Night
82°F
S 7 mph
Precip.
22%
22%
19.08
wed
wed
Day
84°F
S 14 mph
Precip.
15%
15%
Night
82°F
NW 6 mph
Precip.
21%
21%
20.08
thu
thu
Day
84°F
E 1 mph
Precip.
20%
20%
Night
82°F
N 6 mph
Precip.
24%
24%
21.08
fri
fri
Day
84°F
N 14 mph
Precip.
49%
49%
Night
82°F
N 17 mph
Precip.
31%
31%
22.08
sat
sat
Day
82°F
N 18 mph
Precip.
65%
65%
Night
81°F
N 13 mph
Precip.
47%
47%
23.08
sun
sun
Day
82°F
N 12 mph
Precip.
50%
50%
Night
81°F
NE 8 mph
Precip.
68%
68%
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
Guam on a weather map
Places in Northern Mariana Islands:
Name
°F
24 Hours Forecast
Guam
Local time: 18:33
August 10, monday
2100
82°F
E
15 mph
15 mph
August 11, tuesday
0000
82°F
E
14 mph
14 mph
0300
82°F
E
16 mph
16 mph
0600
82°F
E
17 mph
17 mph
0900
82°F
E
19 mph
19 mph
1200
84°F
E
19 mph
19 mph
1500
84°F
NE
19 mph
19 mph
1800
82°F
NE
17 mph
17 mph
