Ewa Beach
Hawaii, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Ewa Beach, HI

September, the first month of the autumn, in Ewa Beach, is still a hot month, with temperature in the range of an average high of 88.3°F (31.3°C) and an average low of 70.3°F (21.3°C).
An excellent water temperature of 80.6°F (27°C) and 0.7" (17.8mm) of accumulated rainfall makes September a prime for swimming and other water activities.

Temperature

The warmest months are August and September, with an average high-temperature of 88.3°F (31.3°C).

Rainfall

During September, Ewa Beach regularly aggregates up to 0.7" (17.8mm) of precipitation. Throughout the year, in Ewa Beach, 19.7" (500.5mm) of rain is accumulated.

Ocean temperature

September is the month with the warmest seawater in Ewa Beach, with an average ocean temperature of 80.6°F (27°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in September is 12.3h.

What is the warmest month in Ewa Beach?

August and September, with an average high-temperature of 88.3°F (31.3°C), are warmest months in Ewa Beach, Hawaii.

What is the temperature in September in Ewa Beach?

In Ewa Beach, Hawaii, in September, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 70.3°F (21.3°C).

How much does it rain in Ewa Beach in September?

During September, Ewa Beach regularly aggregates up to 0.7" (17.8mm) of precipitation.

What month is the ocean warmest in Ewa Beach?

With an average ocean temperature of 80.6°F (27°C), September is the month with the warmest seawater.

What is the ocean temperature in September in Ewa Beach?

In Ewa Beach, the average seawater temperature in September is 80.6°F (27°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Ewa Beach have in September?

The average length of the day in September is 12.3h.
Average temperature in September - Ewa Beach, HI
  • Average high temperature in September: 88.3°F

Warmest months (with the highest average high temperature) are August and September (88.3°F).
The month with the lowest average high temperature is January (80.5°F).

  • Average low temperature in September: 70.4°F

The month with the highest average low temperature is August (71.4°F).
The coldest month (with the lowest average low temperature) is February (62.7°F).

Average rainfall in September - Ewa Beach, HI
  • Average rainfall in September: 0.7"

The wettest month (with the highest rainfall) is December (3.3").
Driest months (with the lowest rainfall) are June and August (0.4").

Average sea temperature in September - Ewa Beach, HI
  • Average sea temperature in September: 80.6°F

The best month for swimming (with the highest average sea temperature) is September (80.6°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).

Average daylight in September - Ewa Beach, HI
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).