Guam, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Hagåtña, GU

The ideal ocean temperature of 84°F (28.9°C) makes May in Hagåtña, Guam, the best time for swimming and other water activities.

Ocean temperature

In May, the average ocean temperature is 84°F (28.9°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.


In May, the average length of the day is 12.7h.

What is the ocean temperature in May in Hagåtña?

In Hagåtña, the average seawater temperature in May is 84°F (28.9°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the average length of the day in May in Hagåtña?

The average length of the day in May in Hagåtña, Guam, is 12.7h.
Average sea temperature in May - Hagåtña, GU
  • Average sea temperature in May: 84°F

The best month for swimming (with the highest average sea temperature) is August (85.4°F).
The coldest month (with the lowest average sea temperature) is February (82°F).

Average daylight in May - Hagåtña, GU
  • Average daylight in May: 12.7h

The month with the longest days is June (Average daylight: 12.9h).
The month with shortest days is December (Average daylight: 11.3h).