Weather in Kailua Beach, Kailua, United States in September

Search

Best
Best
Best
Best
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Tan
Sea
26°
Swim
Sea
25°
Swim
Sea
24°
Swim
Sea
25°
Swim
Sea
26°
Swim
Sea
26°
Swim
Sea
27°
Swim
Sea
27°
Swim
Sea
27°
Swim
Sea
27°
Swim
Sea
26°
Swim
Sea
25°
Swim

Visiting Kailua Beach, Kailua, United States in September

September is one of the best months to visit Kailua Beach for the best beach weather. It has the most sunshine and best sunbathing and swimming conditions of the year.

The weather in September is slightly warmer than the previous month. September has average maximum temperatures of 29°C (84°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 57% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day.

September has total rainfall of 2.3cm (0.9inches) making it mostly dry with very rare light showers although there are 19 days with some rainfall, so on the days it does rain it is only light and intermittent and shouldn't affect your beach enjoyment too much.

Sea temperatures are a very warm 27°C (81°F). September is an excellent month for swimming in Kailua Beach with very comfortable temperatures for bathing all day. The sea temperature in September is slightly warmer than the previous month.

In September, Kailua Beach experiences warm, sunny days with occasional rain showers. The ocean remains calm and inviting, making it perfect for swimming, snorkeling, and stand-up paddleboarding. Surfing conditions may start to improve, and windsurfing and kitesurfing remain popular activities due to the consistent trade winds. Also consider visiting Kailua Beach in one of the other best months of June, July, August, for the best beach weather. Also consider one of our other suggestions for September.

Can you sunbathe in Kailua Beach in September?

Yes, September is a good time for sunbathing in Kailua Beach.

September has average maximum temperatures of 29°C (84°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 57% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day. September has total rainfall of 2.3cm (0.9inches) making it mostly dry with very rare light showers although there are 19 days with some rainfall, so on the days it does rain it is only light and intermittent and shouldn't affect your beach enjoyment too much.

More about September temperature and sunshine.

Can you swim in Kailua Beach in September?

Yes, September is an excellent month for swimming in Kailua Beach with very warm sea temperatures 27°C (81°F).

More about September sea temperatures.

Is September a good time to holiday in Kailua Beach?

Yes, September is a good time for a holiday in Kailua Beach.

September has average maximum temperatures of 29°C (84°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 57% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day. September has total rainfall of 2.3cm (0.9inches) making it mostly dry with very rare light showers although there are 19 days with some rainfall, so on the days it does rain it is only light and intermittent and shouldn't affect your beach enjoyment too much. Sea temperatures are a very warm 27°C (81°F). September is an excellent month for swimming in Kailua Beach with very comfortable temperatures for bathing all day.

More about the September temperatures and sunshine.

Is Kailua Beach warm in September?

Yes, Kailua Beach is very warm and perfect for sunbathing on clear days in September.

The average maximum temperature in Kailua Beach in September is 29°C (84°F). The average maximum temperature is 29°C (84°) in the previous month and 28°C (83°F) in the next month.

The average temperature in Kailua Beach in September is 27°C (80°F). The average temperature is 27°C (80°F) in the previous month and 26°C (79°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is Kailua Beach in September?

The average day light hours per day in Kailua Beach in September are 12.3. The sunshine percentage is 57% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day.

More about September sunshine.

Crowds in Kailua Beach in September

September sees a slight decrease in visitors at Kailua Beach as the peak season starts to wind down. The weather is still warm and sunny, but the beach is not as crowded as it is during the summer months. Labor Day weekend can bring an influx of visitors, but overall, the beach is moderately crowded during this month.

Temperature in Kailua Beach in September

The weather in September is slightly warmer than the previous month. The average maximum temperature in Kailua Beach in September is 29°C (84°F). The average maximum temperature is 29°C (84°F) in the previous month and 28°C (83°F) in the next month.

The average temperature in Kailua Beach in September is 27°C (80°F). The average temperature is 27°C (80°F) in the previous month and 26°C (79°F) in the next month.

The average minimum temperature in Kailua Beach in September is 24°C (75°F). The minimum temperature is 24°C (75°F) in the previous month and 24°C (75°F) in the next month.

Sunshine in Kailua Beach in September

The days in September are slightly shorter than the previous month and days continue to get slightly shorter into October. September has less hours of sunshine than the previous month and hours of sunshine continue to drop into October. During September the average day light hours are 12.3 per day in Kailua Beach. The sunshine percentage is 57% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day.

The ultraviolet index in Kailua Beach in September is typically 11.8 during September. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Kailua Beach in September

The average sea water temperature in Kailua Beach in September is 27.4°C (81.3°F) which is very warm and ideal for relaxing and swimming for the whole day. The sea temperature in September is slightly warmer than the previous month.

Rainfall in Kailua Beach in September

September weather is slightly drier than the previous month. September has fewer days of rain than the previous month. The average total rainfall in Kailua Beach in September is 2.3cm (0.9inches) and on average there are 19 rainy days in September making it a wet time to visit the beach.

Humidity in Kailua Beach in September

The maximum dew point (an indicator of humidity) in Kailua Beach in September is 22°C (72°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan. The dew point is 22°C (72°F) in the previous month and 22°C (22°F) in the next month.

The average maximum relative humidity in Kailua Beach in September is typically 84.9%. The maximum relative humidity is 85.2% in the previous month and 85.9% in the next month.

The average relative humidity in Kailua Beach in September is typically 73.3%. The average relative humidity is 73.3% in the previous month and 74.5% in the next month.

Wind Speed in Kailua Beach in September

The average maximum wind speed in Kailua Beach in September is typically 20KM/H (12MPH). The average maximum wind speed is 22KM/H (14MPH) in the previous month and 20KM/H (12MPH) in the next month.

The average wind speed in Kailua Beach in September is typically 12KM/H (7MPH). The average wind speed is 13KM/H (8MPH) in the previous month and 11KM/H (7MPH) in the next month.

The average wind direction in Kailua Beach in September is from the East-Northeast.

Monthly Averages

Suggested Beaches in September

Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.

Booking.com Search FlightsImage

Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.