Oak Harbor weather in August

In August, Oak Harbor sees average daytime highs of 62°F and overnight lows near 57°F, with 1.4 in of rain across 5.3 wet days and about 14.1 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 62°F through the month. The sky is clear or mostly clear about 52% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 54 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Oak Harbor's 2nd-clearest and 11th-windiest month. For the whole year in context, see Oak Harbor's year-round climate.

Daytime high: 62°; 1st warmest
Overnight low: 57°; 12th coldest
Rainfall: 1.4 in; 5.3 wet days
Daylight: 14 h 06 min; 5:10 AM – 7:19 PM
Cloud cover: 43%; 2nd clearest
Wind: 6 mph; 11th windiest
Solar energy: 5.48 kWh/m²
Travel score: 6.3; out of 10

Oak Harbor is city on Whidbey Island in Island County, Washington State, United States.

Density: 925/km²; people per km²
Founded: 1915

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

← July Oak Harbor year-round climate September →Best places to visit in August

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 62°F through the month.

A typical August day in Oak Harbor reaches about 62°F in the afternoon and slips back to 57°F overnight — a 5°F spread between the day's warmth and the night's chill. On most days the high lands between 59°F and 66°F. Set against its neighbours, August runs on par with July and about 3°F warmer than September.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	63	63	63	63	63	63	63	63	63	63	63	63	63	63	63	63	62	62	62	62	62	62	62	62	62	62	62	62	61	61	61
Avg low (°F)	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	57	56	56	56

	Avg high (°F)	Avg low (°F)
1	63	57
2	63	57
3	63	57
4	63	57
5	63	57
6	63	57
7	63	57
8	63	57
9	63	57
10	63	57
11	63	57
12	63	57
13	63	57
14	63	57
15	63	57
16	63	57
17	62	57
18	62	57
19	62	57
20	62	57
21	62	57
22	62	57
23	62	57
24	62	57
25	62	57
26	62	57
27	62	57
28	62	57
29	61	56
30	61	56
31	61	56

Oak Harbor 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.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	45° / 42°	6.2	18.6	1.4	8.6	0.9
Feb	46° / 42°	4.2	14.7	1.3	9.9	1.1
Mar	48° / 44°	4.8	17.9	0.3	11.6	1.5
Apr	51° / 46°	3.3	14	0	13.4	2.3
May	55° / 50°	2.6	10.5	0	14.9	3.5
Jun	58° / 53°	2.1	9.4	0	15.8	4.4
Jul	62° / 56°	1.2	5.8	0	15.5	6.0
Aug	62° / 57°	1.4	5.3	0	14.1	6.3
Sep	59° / 55°	2.3	8.7	0	12.4	5.0
Oct	54° / 50°	4.7	13.8	0	10.6	3.1
Nov	49° / 45°	7.2	18.5	0.3	9	1.6
Dec	45° / 42°	6.4	18.1	1.4	8.2	0.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	75	74	74	73	72	71	71	71	70	69	69	69	68	68	68	68	67	67	67	65	65	64	63	62	62	62	62	62	62	62	62
Cloudier (%)	25	26	26	27	28	29	29	29	30	31	31	31	32	32	32	32	33	33	33	35	35	36	37	38	38	38	38	38	38	38	38

	Clearer (%)	Cloudier (%)
1	75	25
2	74	26
3	74	26
4	73	27
5	72	28
6	71	29
7	71	29
8	71	29
9	70	30
10	69	31
11	69	31
12	69	31
13	68	32
14	68	32
15	68	32
16	68	32
17	67	33
18	67	33
19	67	33
20	65	35
21	65	35
22	64	36
23	63	37
24	62	38
25	62	38
26	62	38
27	62	38
28	62	38
29	62	38
30	62	38
31	62	38

Chance of precipitation in August

Any precipitation

Oak Harbor gets around 1.4 in of rain over 5.3 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 17% and peaks near 23% on the wettest days. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	14	14	14	14	14	14	14	14	15	15	15	15	16	16	16	16	16	17	17	17	18	18	19	20	20	20	21	21	22	22	23

	Rain chance (%)
1	14
2	14
3	14
4	14
5	14
6	14
7	14
8	14
9	15
10	15
11	15
12	15
13	16
14	16
15	16
16	16
17	16
18	17
19	17
20	17
21	18
22	18
23	19
24	20
25	20
26	20
27	21
28	21
29	22
30	22
31	23

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 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	80	80	79	78	78	77	77	76	76	76	75	76	76	76	77	78	78	79	79	80	80	81	82	82	83	83	84	85	85	85	86
Comfortable (%)	20	20	21	22	22	23	23	24	24	24	25	24	24	24	23	22	22	21	21	20	20	19	18	18	17	17	16	15	15	15	14

	Dry (%)	Comfortable (%)
1	80	20
2	80	20
3	79	21
4	78	22
5	78	22
6	77	23
7	77	23
8	76	24
9	76	24
10	76	24
11	75	25
12	76	24
13	76	24
14	76	24
15	77	23
16	78	22
17	78	22
18	79	21
19	79	21
20	80	20
21	80	20
22	81	19
23	82	18
24	82	18
25	83	17
26	83	17
27	84	16
28	85	15
29	85	15
30	85	15
31	86	14

Wind in August

Winds average 6 mph in August.

Across August, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (mph)	Feels
1	6	calm
2	6	calm
3	6	calm
4	6	calm
5	6	calm
6	6	calm
7	6	calm
8	6	calm
9	6	calm
10	6	calm
11	6	calm
12	6	calm
13	6	calm
14	6	calm
15	6	calm
16	6	calm
17	6	calm
18	6	calm
19	6	calm
20	6	calm
21	6	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm
31	6	calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 54 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 96 minutes over August. Sunrise moves from 4:50 AM to 5:32 AM, and sunset from 7:43 PM to 6:50 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	14.9	14.8	14.8	14.8	14.7	14.7	14.6	14.6	14.5	14.5	14.4	14.4	14.3	14.2	14.2	14.1	14.1	14.0	14.0	13.9	13.9	13.8	13.8	13.7	13.6	13.6	13.5	13.5	13.4	13.4	13.3
Sunrise (AM)	4:50	4:51	4:53	4:54	4:55	4:57	4:58	4:59	5:01	5:02	5:03	5:05	5:06	5:08	5:09	5:10	5:12	5:13	5:15	5:16	5:17	5:19	5:20	5:22	5:23	5:25	5:26	5:27	5:29	5:30	5:32
Sunset (PM)	7:43	7:42	7:40	7:39	7:37	7:36	7:34	7:33	7:31	7:29	7:28	7:26	7:24	7:23	7:21	7:19	7:17	7:15	7:13	7:12	7:10	7:08	7:06	7:04	7:02	7:00	6:58	6:56	6:54	6:52	6:50

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.9	4:50	7:43
2	14.8	4:51	7:42
3	14.8	4:53	7:40
4	14.8	4:54	7:39
5	14.7	4:55	7:37
6	14.7	4:57	7:36
7	14.6	4:58	7:34
8	14.6	4:59	7:33
9	14.5	5:01	7:31
10	14.5	5:02	7:29
11	14.4	5:03	7:28
12	14.4	5:05	7:26
13	14.3	5:06	7:24
14	14.2	5:08	7:23
15	14.2	5:09	7:21
16	14.1	5:10	7:19
17	14.1	5:12	7:17
18	14.0	5:13	7:15
19	14.0	5:15	7:13
20	13.9	5:16	7:12
21	13.9	5:17	7:10
22	13.8	5:19	7:08
23	13.8	5:20	7:06
24	13.7	5:22	7:04
25	13.6	5:23	7:02
26	13.6	5:25	7:00
27	13.5	5:26	6:58
28	13.5	5:27	6:56
29	13.4	5:29	6:54
30	13.4	5:30	6:52
31	13.3	5:32	6:50

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.48 kWh/m².

For context, solar energy here swings from a low near 0.88 kWh/m² to a high of 6.3 kWh/m² in July across the year — August's 5.48 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	6.2	6.2	6.1	6.1	6.0	6.0	5.9	5.9	5.8	5.8	5.7	5.7	5.7	5.6	5.5	5.5	5.5	5.4	5.3	5.3	5.2	5.2	5.2	5.1	5.0	5.0	5.0	4.9	4.9	4.8	4.8
Level	Intense	Intense	Intense	Intense	Intense	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	6.2	Intense
2	6.2	Intense
3	6.1	Intense
4	6.1	Intense
5	6.0	Intense
6	6.0	Bright
7	5.9	Bright
8	5.9	Bright
9	5.8	Bright
10	5.8	Bright
11	5.7	Bright
12	5.7	Bright
13	5.7	Bright
14	5.6	Bright
15	5.5	Bright
16	5.5	Bright
17	5.5	Bright
18	5.4	Bright
19	5.3	Bright
20	5.3	Bright
21	5.2	Bright
22	5.2	Bright
23	5.2	Bright
24	5.1	Bright
25	5.0	Bright
26	5.0	Bright
27	5.0	Bright
28	4.9	Bright
29	4.9	Bright
30	4.8	Bright
31	4.8	Bright

Planning a trip in August

Hazard calendar for Oak Harbor

In seasonPeak

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

Oak Harbor'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 Oak Harbor?

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

6.3

Sightseeing

1st-best month of the year

1.4

Beach & pool

1st-best month of the year

August is a reasonable time to visit Oak Harbor for sightseeing.

What to pack for Oak Harbor in August

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

In August, Oak Harbor sees daytime highs around 62°F and nights near 57°F. Worth packing: a warm layer and sun protection. About 5 days see rain.

a warm layersun protection

Sea temperature near Oak Harbor in August

The nearest coast averages about 54°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 12 mi away) is warmest in August at about 54°F and coldest in February near 46°F.

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°F)	46	46	47	48	50	52	53	54	53	50	49	47
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°F)	Comfort
Jan	46	Bracing
Feb	46	Bracing
Mar	47	Bracing
Apr	48	Bracing
May	50	Bracing
Jun	52	Bracing
Jul	53	Bracing
Aug	54	Bracing
Sep	53	Bracing
Oct	50	Bracing
Nov	49	Bracing
Dec	47	Bracing

UV index in Oak Harbor 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 Oak Harbor 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	4	5	7	6	8	6	4	3	1	1
Level	Low	Low	Moderate	Moderate	High	High	Very high	High	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	4	Moderate
Apr	5	Moderate
May	7	High
Jun	6	High
Jul	8	Very high
Aug	6	High
Sep	4	Moderate
Oct	3	Moderate
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Oak Harbor?

Oak Harbor sits at 48.3°N, 122.6°W, 95 ft above sea level, in United States. The nearest listed city is Anacortes, 15 mi away.

Topography around Oak Harbor

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

Within 2 miles, the terrain around Oak Harbor has only modest variations in elevation — a maximum elevation change of 354 ft around an average of 89 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 771 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,780 ft.

The land around Oak Harbor is covered by water (29%), trees (28%) and grassland (24%) within 2 miles, water (61%) and trees (23%) within 10 miles, and trees (53%) and water (34%) within 50 miles.

2 miles

354 ft

water 29%

10 miles

771 ft

water 61%

50 miles

9,780 ft

trees 53%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← July Oak Harbor year-round climate September →Best places to visit in August

August weather nearby: Anacortes 15 mi · Mount Vernon 17 mi · Arlington 25 mi · Marysville 27 mi · Mukilteo 29 mi · Everett 30 mi · Oak Bay 32 mi · West Lake Stevens 32 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

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 Oak Harbor (48.2932°, -122.6432°, elevation 95 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°F)	Avg low (°F)
1	63	57
2	63	57
3	63	57
4	63	57
5	63	57
6	63	57
7	63	57
8	63	57
9	63	57
10	63	57
11	63	57
12	63	57
13	63	57
14	63	57
15	63	57
16	63	57
17	62	57
18	62	57
19	62	57
20	62	57
21	62	57
22	62	57
23	62	57
24	62	57
25	62	57
26	62	57
27	62	57
28	62	57
29	61	56
30	61	56
31	61	56

	Clearer (%)	Cloudier (%)
1	75	25
2	74	26
3	74	26
4	73	27
5	72	28
6	71	29
7	71	29
8	71	29
9	70	30
10	69	31
11	69	31
12	69	31
13	68	32
14	68	32
15	68	32
16	68	32
17	67	33
18	67	33
19	67	33
20	65	35
21	65	35
22	64	36
23	63	37
24	62	38
25	62	38
26	62	38
27	62	38
28	62	38
29	62	38
30	62	38
31	62	38

	Rain chance (%)
1	14
2	14
3	14
4	14
5	14
6	14
7	14
8	14
9	15
10	15
11	15
12	15
13	16
14	16
15	16
16	16
17	16
18	17
19	17
20	17
21	18
22	18
23	19
24	20
25	20
26	20
27	21
28	21
29	22
30	22
31	23

	Dry (%)	Comfortable (%)
1	80	20
2	80	20
3	79	21
4	78	22
5	78	22
6	77	23
7	77	23
8	76	24
9	76	24
10	76	24
11	75	25
12	76	24
13	76	24
14	76	24
15	77	23
16	78	22
17	78	22
18	79	21
19	79	21
20	80	20
21	80	20
22	81	19
23	82	18
24	82	18
25	83	17
26	83	17
27	84	16
28	85	15
29	85	15
30	85	15
31	86	14

	Avg high (°F)	Avg low (°F)
1	63	57
2	63	57
3	63	57
4	63	57
5	63	57
6	63	57
7	63	57
8	63	57
9	63	57
10	63	57
11	63	57
12	63	57
13	63	57
14	63	57
15	63	57
16	63	57
17	62	57
18	62	57
19	62	57
20	62	57
21	62	57
22	62	57
23	62	57
24	62	57
25	62	57
26	62	57
27	62	57
28	62	57
29	61	56
30	61	56
31	61	56

	Clearer (%)	Cloudier (%)
1	75	25
2	74	26
3	74	26
4	73	27
5	72	28
6	71	29
7	71	29
8	71	29
9	70	30
10	69	31
11	69	31
12	69	31
13	68	32
14	68	32
15	68	32
16	68	32
17	67	33
18	67	33
19	67	33
20	65	35
21	65	35
22	64	36
23	63	37
24	62	38
25	62	38
26	62	38
27	62	38
28	62	38
29	62	38
30	62	38
31	62	38

	Rain chance (%)
1	14
2	14
3	14
4	14
5	14
6	14
7	14
8	14
9	15
10	15
11	15
12	15
13	16
14	16
15	16
16	16
17	16
18	17
19	17
20	17
21	18
22	18
23	19
24	20
25	20
26	20
27	21
28	21
29	22
30	22
31	23

	Dry (%)	Comfortable (%)
1	80	20
2	80	20
3	79	21
4	78	22
5	78	22
6	77	23
7	77	23
8	76	24
9	76	24
10	76	24
11	75	25
12	76	24
13	76	24
14	76	24
15	77	23
16	78	22
17	78	22
18	79	21
19	79	21
20	80	20
21	80	20
22	81	19
23	82	18
24	82	18
25	83	17
26	83	17
27	84	16
28	85	15
29	85	15
30	85	15
31	86	14

	Avg high (°F)	Avg low (°F)
1	63	57
2	63	57
3	63	57
4	63	57
5	63	57
6	63	57
7	63	57
8	63	57
9	63	57
10	63	57
11	63	57
12	63	57
13	63	57
14	63	57
15	63	57
16	63	57
17	62	57
18	62	57
19	62	57
20	62	57
21	62	57
22	62	57
23	62	57
24	62	57
25	62	57
26	62	57
27	62	57
28	62	57
29	61	56
30	61	56
31	61	56

	Clearer (%)	Cloudier (%)
1	75	25
2	74	26
3	74	26
4	73	27
5	72	28
6	71	29
7	71	29
8	71	29
9	70	30
10	69	31
11	69	31
12	69	31
13	68	32
14	68	32
15	68	32
16	68	32
17	67	33
18	67	33
19	67	33
20	65	35
21	65	35
22	64	36
23	63	37
24	62	38
25	62	38
26	62	38
27	62	38
28	62	38
29	62	38
30	62	38
31	62	38

	Rain chance (%)
1	14
2	14
3	14
4	14
5	14
6	14
7	14
8	14
9	15
10	15
11	15
12	15
13	16
14	16
15	16
16	16
17	16
18	17
19	17
20	17
21	18
22	18
23	19
24	20
25	20
26	20
27	21
28	21
29	22
30	22
31	23

	Dry (%)	Comfortable (%)
1	80	20
2	80	20
3	79	21
4	78	22
5	78	22
6	77	23
7	77	23
8	76	24
9	76	24
10	76	24
11	75	25
12	76	24
13	76	24
14	76	24
15	77	23
16	78	22
17	78	22
18	79	21
19	79	21
20	80	20
21	80	20
22	81	19
23	82	18
24	82	18
25	83	17
26	83	17
27	84	16
28	85	15
29	85	15
30	85	15
31	86	14