World Resorts Northern Mariana Islands Guam Weather

Guam Sea Temperature in August

Average sea water temperature in August:
+85.5°F
Minimum sea water temperature in August: 88.2°F
Maximum sea water temperature in August: 83.5°F

Daily 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.

Monthly sea water temperature in Guam, °F

Which Northern Mariana Islands resorts have warmest sea in August?

Place name August 2025 August 2024
Rota 85.6°F 86.0°F
Tinian 85.2°F 86.0°F
Saipan 85.2°F 86.0°F
Susupe 85.1°F 86.1°F
Guam 85.0°F 86.1°F

Best time for vacation in Guam

Sunniest months:
July 5 days
August 5 days
September 5 days
Warmest months:
June 87.5 °F
July 87.3 °F
August 87.0 °F
Warmest sea temp:
August 85.5 °F
September 85.4 °F
July 85.3 °F
Coldest months:
February 83.2 °F
January 83.8 °F
March 84.2 °F
Rainiest months:
October 15 days
August 14 days
September 14 days
Windiest months:
February 17.4 mph
December 17.2 mph
January 16.5 mph

Guam on a weather map

Current weather
11:51
Guam
+81°F
W 23 mph
Feels like: +86°F
Precip.: 100%
Places in Northern Mariana Islands:
Name
°F
Guam
+81°F
Rota
+81°F
Saipan
+79°F
Susupe
+79°F
Tinian
+79°F
24 Hours Forecast
Guam
Local time: 11:51
February 26, thursday
1200
81°F
W
23 mph
1500
81°F
W
22 mph
1800
79°F
W
22 mph
2100
79°F
W
22 mph
February 27, friday
0000
79°F
W
21 mph
0300
79°F
W
19 mph
0600
79°F
W
16 mph
0900
81°F
W
18 mph
Units of measurement: °C / °F