Measurements:
°C
°F
CURRENT WEATHER
20:55
Guam
86°F
SW 11 mph
Feels like: 96°F
Precip: 79%
World Resorts Northern Mariana Islands Guam Weather

7 Day Weather Forecast

08.19
wed
DAY
88°F
S 19 mph
precip
8%
NIGHT
86°F
SW 9 mph
precip
28%
08.20
thu
DAY
90°F
SW 9 mph
precip
20%
NIGHT
86°F
W 7 mph
precip
41%
08.21
fri
DAY
90°F
NW 6 mph
precip
9%
NIGHT
86°F
NW 6 mph
precip
25%
08.22
sat
DAY
88°F
E 12 mph
precip
22%
NIGHT
86°F
NE 13 mph
precip
32%
08.23
sun
DAY
88°F
NE 21 mph
precip
63%
NIGHT
86°F
NE 14 mph
precip
56%
08.24
mon
DAY
84°F
NE 11 mph
precip
71%
NIGHT
82°F
NE 12 mph
precip
63%
08.25
tue
DAY
84°F
NE 9 mph
precip
80%
NIGHT
80°F
E 9 mph
precip
75%

Guam Sea Water Temperature in August, °F

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Guam was 29.2°F. The maximum and minimum values were 28.9°F and 29.9°F respectively.

Guam on the Weather Map

Best Time to Visit Guam
The most sunny months:
July 5 days
August 5 days
September 5 days
The most warm months:
June 91.4 °F
July 91.2 °F
August 91.1 °F
Warmest sea temperature:
August 89.4 °F
September 89.4 °F
July 89.2 °F
The most cold months:
February 86.8 °F
January 87.5 °F
March 87.8 °F
The most rainy months:
October 15 days
August 14 days
September 14 days
The most windy months:
February 17 mph
December 17 mph
January 16 mph
more details