World Resorts Northern Mariana Islands Guam Weather

Guam Sea Temperature in August

Average sea water temperature in August:
+85.4°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:
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.

Monthly sea water temperature in Guam, °F

Which Northern Mariana Islands resorts have warmest sea in August?

Place name August 2026 August 2025
Saipan 85.4°F 85.2°F
Tinian 85.4°F 85.2°F
Susupe 85.3°F 85.1°F
Rota 85.3°F 85.6°F
Guam 84.6°F 85.0°F

Best time for vacation in Guam

Sunniest months:
July 5 days
September 5 days
May 4 days
Warmest months:
June 87.3 °F
July 87.1 °F
August 86.8 °F
Warmest sea temp:
September 85.4 °F
August 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
September 14 days
July 13 days
Windiest months:
February 17.3 mph
December 17.2 mph
January 16.5 mph

Guam on a weather map

Current weather
20:40
Guam
+81°F
NE 6 mph
Feels like: +88°F
Precip.: 31%
Places in Northern Mariana Islands:
Name
°F
Guam
+81°F
Rota
+82°F
Saipan
+84°F
Susupe
+84°F
Tinian
+84°F
24 Hours Forecast
Guam
Local time: 20:40
August 26, wednesday
2100
81°F
NE
6 mph
August 27, thursday
0000
81°F
NE
8 mph
0300
81°F
E
11 mph
0600
81°F
E
11 mph
0900
82°F
E
11 mph
1200
81°F
E
9 mph
1500
79°F
E
11 mph
1800
77°F
NE
5 mph
Units of measurement: °C / °F