Bainbridge Island weather in August

In August, Bainbridge Island sees average daytime highs of 72°F and overnight lows near 58°F, with 1.4 in of rain across 5.7 wet days and about 14.1 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 73°F in the first days to 70°F by the end. The sky is clear or mostly clear about 48% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 48 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Bainbridge Island's 2nd-clearest and 11th-windiest month. For the whole year in context, see Bainbridge Island's year-round climate.

Daytime high
72°
1st warmest
Overnight low
58°
12th coldest
Rainfall
1.4 in
5.7 wet days
Daylight
14 h 06 min
5:11 AM – 7:17 PM
Cloud cover
44%
2nd clearest
Wind
4 mph
11th windiest
Solar energy
5.32 kWh/m²
Travel score
7.7
out of 10

Bainbridge Island is city in Kitsap County, Washington, United States.

Density
141/km²
people per km²
Founded
1841

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 73°F in the first days to 70°F by the end.

A typical August day in Bainbridge Island reaches about 72°F in the afternoon and slips back to 58°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 79°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17358
27358
37358
47358
57358
67359
77359
87359
97358
107358
117358
127358
137358
147258
157258
167258
177258
187258
197258
207258
217158
227158
237158
247157
257157
267157
277057
287057
297057
307057
317057

Bainbridge Island weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan46° / 40°6.217.71.98.71.0
Feb48° / 40°4.114.51.49.91.4
Mar51° / 42°4.7170.811.62.1
Apr55° / 45°3.714.80.113.33.1
May61° / 49°2.611.9014.94.8
Jun65° / 53°2.410.3015.75.9
Jul71° / 57°1.36.2015.47.5
Aug72° / 58°1.45.7014.17.7
Sep66° / 55°2.49012.46.4
Oct58° / 49°4.814.9010.63.8
Nov50° / 43°6.917.70.59.11.8
Dec45° / 40°6.617.42.28.30.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17327
27228
37129
47129
57030
66931
76931
86832
96832
106634
116634
126634
136535
146535
156535
166436
176436
186436
196337
206238
216238
226238
236139
246040
256040
266040
276139
286139
296040
306040
316238

Chance of precipitation in August

Any precipitation

Bainbridge Island gets around 1.4 in of rain over 5.7 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 18% and peaks near 27% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
113
213
313
413
513
614
714
814
914
1015
1115
1215
1315
1416
1516
1616
1717
1817
1918
2018
2119
2220
2321
2422
2523
2624
2725
2825
2926
3027
3127

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 56% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
153443
253443
352453
452453
552453
651463
751463
850473
950473
1050473
1149473
1250473
1350473
1451463
1552453
1653443
1754433
1855423
1957412
2057412
2158402
2259392
2361381
2462371
2563361
2664351
2765341
2866331
2967321
3068311
3168311

Wind in August

Winds average 4 mph in August.

Across August, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 48 min at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over August. Sunrise moves from 4:52 AM to 5:32 AM, and sunset from 7:41 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.84:527:41
214.84:537:39
314.74:547:38
414.74:557:37
514.64:577:35
614.64:587:34
714.54:597:32
814.55:017:30
914.45:027:29
1014.45:037:27
1114.35:057:26
1214.35:067:24
1314.25:077:22
1414.25:097:20
1514.15:107:19
1614.15:117:17
1714.05:137:15
1814.05:147:13
1913.95:167:12
2013.95:177:10
2113.85:187:08
2213.85:207:06
2313.75:217:04
2413.75:227:02
2513.65:247:00
2613.55:256:58
2713.55:276:56
2813.45:286:54
2913.45:296:52
3013.35:316:50
3113.35:326:48

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.32 kWh/m².

For context, solar energy here swings from a low near 0.86 kWh/m² to a high of 6.07 kWh/m² in July across the year — August's 5.32 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Bright
35.9Bright
45.9Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.6Bright
115.6Bright
125.5Bright
135.5Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
254.9Bright
264.9Bright
274.8Bright
284.8Bright
294.8Bright
304.7Bright
314.7Bright
Planning a trip in August

Hazard calendar for Bainbridge Island

In seasonPeak

None of Bainbridge Island's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Bainbridge Island's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Bainbridge Island?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.7
Sightseeing
1st-best month of the year
5.4
Beach & pool
1st-best month of the year

August is one of the better times to visit Bainbridge Island for general sightseeing.

What to pack for Bainbridge Island in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Bainbridge Island sees daytime highs around 72°F and nights near 58°F. Worth packing: light clothes and sun protection. About 6 days see rain.

light clothessun protection

Sea temperature near Bainbridge Island in August

The nearest coast averages about 53°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 38 mi away) is warmest in August at about 53°F and coldest in February near 46°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

45°50°55°JanFebMarAprMayJunJulAugSepOctNovDecbracing
Sea temperature (°F)Comfort
Jan46Bracing
Feb46Bracing
Mar47Bracing
Apr48Bracing
May50Bracing
Jun52Bracing
Jul53Bracing
Aug53Bracing
Sep53Bracing
Oct50Bracing
Nov49Bracing
Dec47Bracing

UV index in Bainbridge Island in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bainbridge Island peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Bainbridge Island in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Bainbridge Island is worst in August — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodModerateGoodAug 2119 µg/m³Dec 157 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar12Moderate
Apr12Good
May13Moderate
Jun11Good
Jul10Good
Aug20Moderate
Sep18Moderate
Oct11Good
Nov7Good
Dec6Good
Location & terrain

Where is Bainbridge Island?

Bainbridge Island sits at 47.6°N, 122.5°W, 89 ft above sea level, in United States. The nearest listed city is Bremerton, 6.8 mi away.

Topography around Bainbridge Island

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Bainbridge Island.

Within 2 miles, the terrain around Bainbridge Island has only modest variations in elevation — a maximum elevation change of 453 ft around an average of 144 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 623 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,589 ft.

The land around Bainbridge Island is covered by trees (64%) and water (26%) within 2 miles, water (44%) and trees (40%) within 10 miles, and trees (70%) within 50 miles.

2 miles
453 ft
10 miles
623 ft
50 miles
7,589 ft
treesgrasslandartificial surfacesbare terrainwater
August weather nearby: Bremerton 6.8 mi · Silverdale 8.1 mi · Seattle 8.7 mi · Columbia City 12 mi · Shoreline 12 mi · Burien 14 mi · Edmonds 14 mi · Mercer Island 14 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Bainbridge Island (47.6262°, -122.5212°, elevation 89 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).