August weather forecast
Guam, USA

In August, Guam remains deeply entrenched within the wet season. The temperatures during this period hover between 82°F (27.8°C) and 90°F (32.2°C). Along with July, August stands as one of the most humid and rain-drenched months for Guam, asserting the dominance of its tropical rainforest climate.

Across the breadth of Guam, the intensity of the rainfall is consistently felt. The island, having been under the influence of the wet season for a couple of months now, witnesses its landscapes frequently bathed in showers. This month continues the legacy of July's moisture-laden patterns, with the environment echoing the full force of the monsoon.

Compared to the preceding month of July, August often sees even more days of rainfall. Its standing as a peak month for precipitation is evident in the frequency of downpours. Yet, the northeast trade winds, flowing between 10mph (16.1km/h) and 20mph (32.2km/h), persist in their duty, providing intermittent breezy intervals amidst the persistent rain and humidity.

The surrounding ocean waters, although warm, become more turbulent due to the increased weather activity, including potential storms. Such conditions demand vigilance from those partaking in sea-based adventures. As August comes to a close, September's approach hints at a gradual transition towards the end phase of the wet season, but not without its fair share of heavy rains and potential storms.

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• Hagåtña - August »
  August is the month with the warmest seawater in Hagåtña, with an average ocean temperature of 85.5°F (29.7°C). The least humid month in Hagåtña is August, with an average relative humidity of 76%.
• Dededo - August »
  August is the least humid month in Dededo, Guam, with an average relative humidity of 76%. The least humid month in Dededo is August, with an average relative humidity of 76%.
• Santa Rita - August »
  August is the least humid month in Santa Rita with an average relative humidity of 76%. August is the least humid month in Santa Rita, with an average relative humidity of 76%.
• Agat - August »
  With an average relative humidity of 76%, August is the least humid month in Agat. August carries forward the weather profile of July in Agat, with high rainfall and temperature.
• Piti - August »
  The month with the warmest seawater in Piti, Guam, is August, with an average ocean temperature of 85.5°F (29.7°C). The least humid month in Piti is August, with an average relative humidity of 76%.
• Talofofo - August »
  July and August, with an average high-temperature of 84.7°F (29.3°C), are marked as the warmest months in Talofofo, Guam. August is the least humid month in Talofofo, with an average relative humidity of 76%.
• Inarajan - August »
  In Inarajan during August, the rain falls for 28.9 days and regularly aggregates up to 9.76" (248mm) of precipitation. August is the least humid month in Inarajan, with an average relative humidity of 76%.
• Merizo - August »
  With an average ocean temperature of 85.5°F (29.7°C), August is the month with the warmest seawater in Merizo. The month with the warmest seawater in Merizo is August, with an average ocean temperature of 85.5°F (29.7°C).
• Umatac - August »
  With an average relative humidity of 76%, August is the least humid month in Umatac, Guam. January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Umatac, Guam.
• Guam National Wildlife Refuge - August »
  August is the month with the warmest seawater in Guam National Wildlife Refuge, with an average ocean temperature of 85.5°F (29.7°C). With an average ocean temperature of 85.5°F (29.7°C), August is the month with the warmest seawater in Guam National Wildlife Refuge.