World Resorts

Northern Mariana Islands

Guam Weather

Guam 14 Days Forecast

18.08
tue

Day

84°F

SE 4 mph

Precip.
17%

Night

82°F

S 8 mph

Precip.
21%

19.08
wed

Day

84°F

S 15 mph

Precip.
36%

Night

82°F

SW 11 mph

Precip.
26%

20.08
thu

Day

86°F

SW 8 mph

Precip.
10%

Night

82°F

SW 5 mph

Precip.
29%

21.08
fri

Day

86°F

SW 6 mph

Precip.
15%

Night

81°F

NW 2 mph

Precip.
23%

22.08
sat

Day

84°F

E 12 mph

Precip.
24%

Night

82°F

NE 12 mph

Precip.
30%

23.08
sun

Day

84°F

NE 18 mph

Precip.
49%

Night

82°F

NE 19 mph

Precip.
35%

24.08
mon

Day

84°F

NE 24 mph

Precip.
46%

Night

82°F

NE 19 mph

Precip.
63%

25.08
tue

Day

84°F

NE 17 mph

Precip.
56%

Night

82°F

NE 13 mph

Precip.
50%

26.08
wed

Day

84°F

NE 17 mph

Precip.
43%

Night

79°F

NE 13 mph

Precip.
90%

27.08
thu

Day

79°F

NE 17 mph

Precip.
73%

Night

79°F

NE 16 mph

Precip.
74%

28.08
fri

Day

81°F

NE 19 mph

Precip.
73%

Night

77°F

NE 14 mph

Precip.
72%

29.08
sat

Day

82°F

N 12 mph

Precip.
22%

Night

81°F

NW 9 mph

Precip.
33%

30.08
sun

Day

84°F

W 9 mph

Precip.
30%

Night

81°F

SW 4 mph

Precip.
54%

31.08
mon

Day

84°F

W 7 mph

Precip.
19%

Night

82°F

NW 4 mph

Precip.
53%

sea water
temperature

Guam

monthly
weather

Guam

current
weather

Guam

7 days
forecast

Guam

January
February
March
April

May
June
July
August

September
October
November
December

Show year:

2026

2025

2024

The average sea water temperature in August of 2026 was 84.6°F. The highest and lowest sea temperatures during the month were 85.8°F and 84.0°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.