Climate and monthly weather forecast
Ewa Beach, HI

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The climate of Ewa Beach

Ewa Beach, Hawaii, USA falls under the Köppen climate classification of As, recognized as a Tropical wet and dry or savanna type of climate. Geographically, it is situated around the same latitude as the Tropic of Cancer. This locale is nestled in a subtropical belt, well-known for its tropical climate.

Throughout the year, Ewa Beach enjoys a warm tropical climate. Variability in weather conditions can be seen with the different weather parameters. High temperatures range from 75.9°F (24.4°C) to 81.5°F (27.5°C), while lows hover between 70.5°F (21.4°C) and 76.3°F (24.6°C), signifying minimal deviation. Relative humidity stands consistently from 74 to 76%. Sea temperatures are also warm, oscillating from 75.7°F (24.3°C) to 80.6°F (27°C).

Ewa Beach experiences rainfall year-round with an emphasis on heavier rain from February to March. The highest recorded rainfall is 1.77" (45mm) in March, while July sees the driest conditions with merely 0.43" (11mm). Daylight hours span from 10.9 to 13.4 hours with January having the shortest days and June enjoys the longest ones. Sunshine hours range from a minimum of 6.7 hours in November to a maximum of 11 hours in June.

Interestingly, Ewa Beach exhibits distinct weather patterns. A clear illustration is cloud cover, which moves from 30 to 37% through the year. Simultaneously, wind speeds also show fluctuations- reaching up to 11.9mph (19.2km/h) in July and clocking at 9.1mph (14.6km/h) in January.

The best time to visit Ewa Beach

The best time to visit Ewa Beach can be considered from June to July. With an average temperature peaking at 81.5°F (27.5°C) in August, the pleasant weather provides suitable conditions for outdoor oceanic and beach activities. Moreover, sea temperatures hit an agreeable high of 80.6°F (27°C), ideal for water activities including swimming, snorkeling, and surfing. Furthermore, both June and July record the maximum sunshine duration of 13.4 hours making it the perfect time for vacationers to relish the Hawaiian beach ambiance.

The worst time to visit Ewa Beach

However, February and March represent the least favorable period for a visit. This time witnesses peak rainfall measurements of 1.77" (45mm), creating damp conditions. Furthermore, these months bring a high number of rainfall days, reaching up to 18.1 days in March. These criteria combined with the reduced sunshine hours compared to the summer months, mark this period as the least alluring to visitors.

Spring weather in Ewa Beach

Spring unfolds in Ewa Beach from March to May, with temperatures shifting from 75.2°F (24°C) to 78.6°F (25.9°C). This period experiences a significant increase in rainfall from 1.77" (45mm) to 1.14" (29mm). Sunlight durations embark on an upward trend, going from 12 hours to 13.2 hours per day. This amalgamation of moderately warm temperatures, increased rainfall, and elongating daylight frames the quintessential springtime experience.

Summer weather in Ewa Beach

Summer stretches from June to August, with temperature highs soaring from 79.7°F (26.5°C) to 81.5°F (27.5°C) and lows varying from 74.8°F (23.8°C) to 76.3°F (24.6°C). Rainfall hits the lowest level at 0.43" (11mm), making it the driest season. Furthermore, sunshine extends up to a maximum of 13.4 hours a day, catering to long island beach days.

Autumn weather in Ewa Beach

Autumn in Ewa Beach runs from September through November, with temperature highs wavering from 81.5°F (27.5°C) to 78.8°F (26°C), and lows alternately between 76.3°F (24.6°C) and 74.5°F (23.6°C). Rainfall increases steadily, reaching up to 1.42" (36mm) in November, indicating the beginning of the wetter season. Daylight hours gradually decrease, standing at 11.1 hours per day by November.

Winter weather in Ewa Beach

Winter envelopes Ewa Beach from December to February, characterized by high temperatures dropping to 75.9°F (24.4°C) and lows down to 70.5°F (21.4°C), marking the coolest time of the year. Rainfall climbs to a year-high of 1.42" (36mm) in February, signifying the wettest season. The shorter days with 10.9 hours of daylight in December make for shorter beach visits and activities.

Weather in January

Donning the crown for the month with the highest relative humidity on average, January in Ewa Beach brings a moist charm. The consistent light of approximately 11 hours a day sets the stage for frequent nighttime relaxation. The balmy trade winds dance throughout the town, maintaining a soothing flow of air. Weather in January »

Weather in February

As the calendar turns to February, Ewa Beach experiences subtle changes in the weather. The generally unchanged temperature gives way to the anticipation of a slightly wetter season. With increased average monthly rainfall and prevalent humidity, indoor activities become more favorable. Weather in February »

Weather in March

March claims the title for the peak month for rainfall in Ewa Beach, with an average of 1.77" (45mm). However, the variation in temperature is barely perceptible, underpinning the region's typical tropical climate. Still, the residents find respite in the slowly expanding daily duration of sunlight. Weather in March »

Weather in April

By April, Ewa Beach sees the beginning of a pattern of declining rainfall. A notable characteristic of April is the increased daylight, which amplifies outdoor activities and beach visits. As the ocean begins to warm up, it beckons to the community for refreshing dips. Weather in April »

Weather in May

May brings a significant shift in Ewa Beach, with the longest hours of sunshine peaking at 10.5 hours per day. Consequently, it becomes a prime month for beach sports and soaking up the Hawaiian sun. The rainfall continues to recede, and the winds moderate, further harmonizing the climatic conditions. Weather in May »

Weather in June

June marks the formal arrival of summer in Ewa Beach, accentuated by the longest days of the year. The reduced rainfall goes hand in hand with the exciting feel of the season. Parallely, the town sports the highest sea temperature, further enhancing the beach festivities. Weather in June »

Weather in July

July in Ewa Beach is characterized by the zenith of the summer heat, with high temperatures reaching 80.6°F (27°C) on average. Concomitant with the elevated temperatures is the all-time low monthly rainfall, making it the driest month of the year. Weather in July »

Weather in August

The weather script in Ewa Beach continues its summer glory in August. The month sees minor augmentations in the temperature, but the climate remains predominantly warm and enjoyable. The town exhibits the highest temperatures, both sea and land, during this month. Weather in August »

Weather in September

September in Ewa Beach witnesses an exquisite balance between the receding summer and the upcoming fall. The maintained ocean temperature underlines the persistent allure of the beachfront. The weather upholds the summer charm, facilitated by the pleasant temperatures and long beaches. Weather in September »

Weather in October

As October rolls in, Ewa Beach commences its descent into the cooler season. However, the most impressive feature of October is not the dropping temperatures, but the equal duration of day and night. Along with this fascinating phenomenon, rainfall sees an upward shift, making the evenings more refreshing. Weather in October »

Weather in November

November marks the initiation of the cooler season in Ewa Beach. The reduced temperature paves the way for enjoyable outdoor ventures without the summer heat. Coupled with the changing foliage, the town takes on a new hue. On the flip side, November experiences one of the lowest sunshine durations of 6.7 hours per day. Weather in November »

Weather in December

December, the last month of the year, offers Ewa Beach a cooler reprieve from the draining summer heat. As the island veers towards its coldest, the city wraps up the year with soothing weather and festive vibrance. The mild drop in sea temperature slightly curtails water activities. Weather in December »
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Frequently asked questions

What are the least humid months in Ewa Beach?

January, April through June, August through November, with an average relative humidity of 74%, are the least humid months.

How many days does it rain in Ewa Beach?

Throughout the year, in Ewa Beach, Hawaii, there are 172.2 rainfall days, and 12.72" (323mm) of precipitation is accumulated.

When is the lowest UV index in Ewa Beach?

January through May, October through December, with an average maximum UV index of 6, are months with the lowest UV index.

What are the coldest months in Ewa Beach?

With an average high-temperature of 74.8°F (23.8°C) and an average low-temperature of 69.4°F (20.8°C), February is the coldest month.

What is the rainiest month in Ewa Beach?

March is the month with the most rainfall. Rain falls for 18.1 days and accumulates 1.77" (45mm) of precipitation.

When is the ocean coldest in Ewa Beach?

March is the month with the coldest seawater in Ewa Beach, Hawaii, with an average ocean temperature of 75.7°F (24.3°C).

When are the longest days in Ewa Beach?

The month with the longest days is June, with an average of 13h and 24min of daylight.

What month has the most sunshine in Ewa Beach?

The month with the most sunshine in Ewa Beach is June, with an average of 11h of sunshine.

What is the month with the highest UV index in Ewa Beach?

The months with the highest UV index in Ewa Beach are June through September, with an average maximum UV index of 7.

What is the driest month in Ewa Beach?

July is the month with the least rainfall in Ewa Beach. Rain falls for 11.3 days and accumulates 0.43" (11mm) of precipitation.

What part of the year is the hottest in Ewa Beach?

The warmest period in Ewa Beach falls in August and September, when the average high-temperature reaches 81.5°F (27.5°C).

What is the month with the warmest ocean in Ewa Beach?

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

What is the month with the least sunshine in Ewa Beach?

November has the least sunshine of the year, with an average of 6.7h of sunshine.

What is the most humid month in Ewa Beach?

The most humid month in Ewa Beach, Hawaii, is December, with an average relative humidity of 76%.

What is the month with the shortest days in Ewa Beach?

With an average of 10h and 54min of daylight, December has the shortest days of the year in Ewa Beach.

Is there Daylight Saving Time (DST) in Ewa Beach?

Ewa Beach, Hawaii, does not observe Daylight Saving Time (DST). HST timezone is used throughout the entire year.

Average temperature
Ewa Beach, HI

Average temperature - Ewa Beach, HI

The warmest months (with the highest average high temperature) are August and September (81.5°F).
The month with the lowest average high temperature is February (74.8°F).

The months with the highest average low temperature are August and September (76.3°F).
The coldest month (with the lowest average low temperature) is February (69.4°F).

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Average pressure
Ewa Beach, HI

Average pressure - Ewa Beach, HI

The months with the highest atmospheric pressure are March and April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).

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Average wind speed
Ewa Beach, HI

Average wind speed - Ewa Beach, HI

The windiest month (with the highest average wind speed) is July (11.9mph).
The calmest months (with the lowest average wind speed) are January and October (9.1mph).

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Average humidity
Ewa Beach, HI

Average humidity - Ewa Beach, HI

The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are January, April, May, June, August, September, October and November (74%).

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Average rainfall
Ewa Beach, HI

Average rainfall - Ewa Beach, HI

The wettest month (with the highest rainfall) is March (1.77").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days
Ewa Beach, HI

Average rainfall days - Ewa Beach, HI

The month with the highest number of rainy days is March (18.1 days).
The month with the least rainy days is July (11.3 days).

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Average sea temperature
Ewa Beach, HI

Average sea temperature - Ewa Beach, HI

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).

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Average daylight / Average sunshine
Ewa Beach, HI

Average daylight / Average sunshine - Ewa Beach, HI

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).

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Average sunshine days
Ewa Beach, HI

Average sunshine days - Ewa Beach, HI

The months with the most sunshine days are July and August (15.3 days).
The month with the least sunshine days is March (6.8 days).

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Average UV index
Ewa Beach, HI

Average UV index - Ewa Beach, HI

The months with the highest UV index are June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 6).

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Average visibility
Ewa Beach, HI

Average visibility - Ewa Beach, HI

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Ewa Beach, Hawaii, USA

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