yearsofweather

Honolulu in August:
seriously hot, little rain

Honolulu, United States · Records from 2006 to 2025. Not a forecast.

Mean high32°Hottest day 34.5° (2019)
Mean low24°Coldest night 21.5° (2008)
Rain days3 days0-10 by year
Rainfall28mmDaylight 13.1 → 12.6 h
Honolulu's 12 months iBest: December to February
Trip types Beach Goodwarm seaSightseeing on foot Poorhot and muggy
Humidity72%25 muggy days
Clear days8 days2 overcast days
Mean wind18 km/hRarely windy
Sea temperature26.9°26.5-27.2° by year (last 6)
Sunrise / sunset (15th)06:10 / 19:02Daylight 13.1 → 12.6 h

Honolulu in August

The sea is among its warmest of the year, which makes swimming and snorkeling easy. Tropical storms pass nearby in some years, so check before you fly. Summer holidays across Asia and North America keep airfares high.

August brought serious heat to Honolulu, 32°C on a typical afternoon and 24°C overnight. Early mornings were the best time to be outside. It stayed mostly dry, with 3 rain days on average. August was bone dry in 2 of 20 years, yet 2015 brought 10 rain days.

29 days past 30°C made it a month for early starts and a long lunch indoors.

Hurricanes i

3 of the last 20 years had a tropical storm pass within 300 km this month.

  • Iselle (2014), 193 km away tropical storm
  • Lane (2018), 223 km away hurricane strength
  • Hone (2024), 255 km away tropical storm
1 2 3 4 5 6 17 38 39 110 11 12

Date by date i

‹ July August 2027 September ›
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
1-7rain on 10% of days31° 24°
8-14rain on 6% of days32° 24°
15-21rain on 6% of days32° 24°
22-28rain on 16% of days32° 24°
29-31rain on 12% of days32° 24°

0-5/206-8/209-11/2012-20/20

1-7rain on 10% of days31° 24°
8-14rain on 6% of days32° 24°
15-21rain on 6% of days32° 24°
22-28rain on 16% of days32° 24°
29-31rain on 12% of days32° 24°
Tap another date to change

2006none
2007none
2008none
2009none
2010none
2011none
20122mm
2013none
2014none
201549mm
201618mm
2017none
201822mm
2019none
2020none
20211mm
20224mm
2023none
20242mm
2025none
Holidays in August (2027)
  • August 20 Statehood Day

1 Local public holiday or break (busier, pricier)

Your trip dates, the past 20 years

Trip dates ~

You can also click two dates on the axis. Hover a cell to see that day's rain.
Trip rain days Month rain days
2006
1 d 1 d
2007
0 d 1 d
2008
1 d 3 d
2009
0 d 4 d
2010
1 d 4 d
2011
0 d 0 d
2012
0 d 1 d
2013
1 d 2 d
2014
0 d 3 d
2015
0 d 10 d
2016
2 d 6 d
2017
0 d 2 d
2018
1 d 6 d
2019
2 d 3 d
2020
0 d 1 d
2021
0 d 2 d
2022
2 d 5 d
2023
0 d 0 d
2024
1 d 5 d
2025
2 d 2 d
Years with rain
Tap a date to start, tap another to end. Each cell is that date in one year.
'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
of 20
3
1
2
1
2
3
2
1
1
4
1
1
0
0
1
0
1
3
2
2
0
1
7
3
2
4
4
2
1
2
4
Rain days on trip
10101001002012002012

No rain1-9 mm10 mm or more Dates outside your trip are dimmed.

One row per year, one cell per day. 2011 had 0 rain days, 2015 had 10.

Honolulu through the year

MonthHighLowRain daysRainfallSea
JanuaryGood 27°19°5 days35mm 25°
FebruaryGood 27°20°6 days49mm 25°
March 28°20°7 days61mm 25°
April 29°21°6 days36mm 25°
May 29°22°3 days26mm 25°
June 31°23°2 days16mm 26°
July 31°24°3 days15mm 26°
August 32°24°3 days28mm 27°
September 31°24°3 days19mm 27°
October 31°23°5 days36mm 27°
November 29°22°5 days44mm 27°
DecemberGood 28°21°6 days71mm 26°

Common questions

Does it rain a lot in Honolulu in August?

Over the past 20 years August averaged 3 rain days (1 mm or more) out of 31. Individual years ran from 0 in the driest to 10 in the wettest.

What should I wear in Honolulu in August?

Days averaged 32°C and nights 24°C. Pack T-shirts, sunscreen plus a hat, a swimsuit, and insect repellent.

Can you swim in Honolulu in August?

Sea surface temperature averaged 26.9°C in August, comfortable for swimming. Year to year it ranged 26.5-27.2°C. Check local flags for waves and jellyfish on the day.

Is August a good time to visit Honolulu?

On warmth and rain days alone, Honolulu's easiest months were December to February. August ranked 10 of 12.

Is Honolulu humid in August?

Mean relative humidity was 72%, with about 25 muggy days (dew point of 20°C or more) in the month.