Coos Bay weather in August

In August, Coos Bay sees average daytime highs of 68°F and overnight lows near 55°F, with 0.4 in of rain across 1.9 wet days and about 13.8 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 68°F through the month. The sky is clear or mostly clear about 69% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 24 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Coos Bay's 2nd-clearest and 11th-windiest month. For the whole year in context, see Coos Bay's year-round climate.

Daytime high: 68°; 1st warmest
Overnight low: 55°; 12th coldest
Rainfall: 0.4 in; 1.9 wet days
Daylight: 13 h 48 min; 5:27 AM – 7:15 PM
Cloud cover: 33%; 2nd clearest
Wind: 8 mph; 11th windiest
Solar energy: 6.32 kWh/m²
Travel score: 8.0; out of 10

Coos Bay is city in Coos County, Oregon, United States.

Density: 393/km²; people per km²
Founded: 1853

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

← July Coos Bay 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 68°F through the month.

A typical August day in Coos Bay reaches about 68°F in the afternoon and slips back to 55°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 64°F and 72°F. Set against its neighbours, August runs on par with July and about 1°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)	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68	68
Avg low (°F)	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55	55

	Avg high (°F)	Avg low (°F)
1	68	55
2	68	55
3	68	55
4	68	55
5	68	55
6	68	55
7	68	55
8	68	55
9	68	55
10	68	55
11	68	55
12	68	55
13	68	55
14	68	55
15	68	55
16	68	55
17	68	55
18	68	55
19	68	55
20	68	55
21	68	55
22	68	55
23	68	55
24	68	55
25	68	55
26	68	55
27	68	55
28	68	55
29	68	55
30	68	55
31	68	55

Coos Bay 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	51° / 43°	8.1	17.3	0.4	9.2	2.1
Feb	52° / 43°	6.2	14.8	0.5	10.2	2.4
Mar	53° / 44°	6.6	16.8	0.4	11.6	2.6
Apr	56° / 45°	4.6	14.8	0.1	13.2	3.3
May	60° / 49°	2.5	9.5	0	14.5	4.8
Jun	63° / 52°	1.3	5.9	0	15.2	6.3
Jul	67° / 54°	0.2	1.4	0	14.9	8.0
Aug	68° / 55°	0.4	1.9	0	13.8	8.0
Sep	67° / 53°	1.1	4.2	0	12.3	7.4
Oct	61° / 50°	3.5	9.4	0	10.8	5.4
Nov	55° / 46°	7.6	16.8	0.1	9.5	2.9
Dec	51° / 43°	9.5	17.6	0.2	8.8	2.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 14% of August, with mostly cloudy or overcast conditions the remaining 17%.

	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 (%)	83	83	83	82	82	82	82	82	82	82	82	82	82	83	83	83	84	84	84	84	84	83	83	84	83	83	83	84	83	83	83
Cloudier (%)	17	17	17	18	18	18	18	18	18	18	18	18	18	17	17	17	16	16	16	16	16	17	17	16	17	17	17	16	17	17	17

	Clearer (%)	Cloudier (%)
1	83	17
2	83	17
3	83	17
4	82	18
5	82	18
6	82	18
7	82	18
8	82	18
9	82	18
10	82	18
11	82	18
12	82	18
13	82	18
14	83	17
15	83	17
16	83	17
17	84	16
18	84	16
19	84	16
20	84	16
21	84	16
22	83	17
23	83	17
24	84	16
25	83	17
26	83	17
27	83	17
28	84	16
29	83	17
30	83	17
31	83	17

Chance of precipitation in August

Any precipitation

Coos Bay gets around 0.4 in of rain over 1.9 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 6% and peaks near 9% on the wettest days.

	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 (%)	4	4	4	4	4	4	4	4	4	4	4	4	4	5	5	5	5	6	6	7	7	7	8	8	8	9	9	9	9	8	8

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

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 65% 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 (%)	70	70	69	68	67	66	65	64	63	63	62	62	61	61	61	62	62	63	63	64	65	65	66	67	67	68	68	69	69	70	70
Comfortable (%)	30	30	31	32	33	34	35	36	37	37	38	38	39	39	39	38	38	37	37	36	35	35	34	33	33	32	32	31	31	30	30

	Dry (%)	Comfortable (%)
1	70	30
2	70	30
3	69	31
4	68	32
5	67	33
6	66	34
7	65	35
8	64	36
9	63	37
10	63	37
11	62	38
12	62	38
13	61	39
14	61	39
15	61	39
16	62	38
17	62	38
18	63	37
19	63	37
20	64	36
21	65	35
22	65	35
23	66	34
24	67	33
25	67	33
26	68	32
27	68	32
28	69	31
29	69	31
30	70	30
31	70	30

Wind in August

Winds average 8 mph in August.

Across August, daily wind ranges from about 8 mph on the calmest days to 9 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)	9	9	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 24 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 5:10 AM to 5:44 AM, and sunset from 7:35 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)	14.4	14.4	14.3	14.3	14.3	14.2	14.2	14.1	14.1	14.1	14.0	14.0	13.9	13.9	13.8	13.8	13.8	13.7	13.7	13.6	13.6	13.5	13.5	13.4	13.4	13.3	13.3	13.2	13.2	13.1	13.1
Sunrise (AM)	5:10	5:12	5:13	5:14	5:15	5:16	5:17	5:18	5:19	5:20	5:21	5:23	5:24	5:25	5:26	5:27	5:28	5:29	5:30	5:32	5:33	5:34	5:35	5:36	5:37	5:38	5:40	5:41	5:42	5:43	5:44
Sunset (PM)	7:35	7:34	7:33	7:32	7:31	7:29	7:28	7:27	7:25	7:24	7:22	7:21	7:19	7:18	7:16	7:15	7:13	7:12	7:10	7:09	7:07	7:05	7:04	7:02	7:00	6:58	6:57	6:55	6:53	6:51	6:50

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.4	5:10	7:35
2	14.4	5:12	7:34
3	14.3	5:13	7:33
4	14.3	5:14	7:32
5	14.3	5:15	7:31
6	14.2	5:16	7:29
7	14.2	5:17	7:28
8	14.1	5:18	7:27
9	14.1	5:19	7:25
10	14.1	5:20	7:24
11	14.0	5:21	7:22
12	14.0	5:23	7:21
13	13.9	5:24	7:19
14	13.9	5:25	7:18
15	13.8	5:26	7:16
16	13.8	5:27	7:15
17	13.8	5:28	7:13
18	13.7	5:29	7:12
19	13.7	5:30	7:10
20	13.6	5:32	7:09
21	13.6	5:33	7:07
22	13.5	5:34	7:05
23	13.5	5:35	7:04
24	13.4	5:36	7:02
25	13.4	5:37	7:00
26	13.3	5:38	6:58
27	13.3	5:40	6:57
28	13.2	5:41	6:55
29	13.2	5:42	6:53
30	13.1	5:43	6:51
31	13.1	5:44	6:50

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.32 kWh/m².

For context, solar energy here swings from a low near 1.32 kWh/m² to a high of 7.22 kWh/m² in July across the year — August's 6.32 kWh/m² sits near the top of that range.

	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)	6.9	6.9	6.8	6.8	6.8	6.7	6.7	6.7	6.6	6.6	6.5	6.5	6.5	6.4	6.4	6.4	6.3	6.3	6.2	6.2	6.2	6.1	6.1	6.0	6.0	6.0	5.9	5.9	5.8	5.8	5.8
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	6.9	Intense
2	6.9	Intense
3	6.8	Intense
4	6.8	Intense
5	6.8	Intense
6	6.7	Intense
7	6.7	Intense
8	6.7	Intense
9	6.6	Intense
10	6.6	Intense
11	6.5	Intense
12	6.5	Intense
13	6.5	Intense
14	6.4	Intense
15	6.4	Intense
16	6.4	Intense
17	6.3	Intense
18	6.3	Intense
19	6.2	Intense
20	6.2	Intense
21	6.2	Intense
22	6.1	Intense
23	6.1	Intense
24	6.0	Intense
25	6.0	Intense
26	6.0	Bright
27	5.9	Bright
28	5.9	Bright
29	5.8	Bright
30	5.8	Bright
31	5.8	Bright

Planning a trip in August

Hazard calendar for Coos Bay

In seasonPeak

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

Coos Bay's rainy season runs November–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 Coos Bay?

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

8.0

Sightseeing

1st-best month of the year

4.2

Beach & pool

1st-best month of the year

August is one of the better times to visit Coos Bay for general sightseeing.

What to pack for Coos Bay in August

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

In August, Coos Bay sees daytime highs around 68°F and nights near 55°F. Pack sun protection.

sun protection

Sea temperature near Coos Bay in August

The nearest coast averages about 56°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 8 mi away) is warmest in September at about 56°F and coldest in February near 51°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)	51	51	51	52	53	55	55	56	56	55	53	52
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°F)	Comfort
Jan	51	Bracing
Feb	51	Bracing
Mar	51	Bracing
Apr	52	Bracing
May	53	Bracing
Jun	55	Bracing
Jul	55	Bracing
Aug	56	Bracing
Sep	56	Bracing
Oct	55	Bracing
Nov	53	Bracing
Dec	52	Bracing

UV index in Coos Bay in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Coos Bay peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	2	4	5	9	8	9	7	5	4	2	1
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Very high	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	2	Low
Feb	2	Moderate
Mar	4	Moderate
Apr	5	High
May	9	Very high
Jun	8	Very high
Jul	9	Very high
Aug	7	Very high
Sep	5	Moderate
Oct	4	Moderate
Nov	2	Low
Dec	1	Low

Location & terrain

Where is Coos Bay?

Coos Bay sits at 43.4°N, 124.2°W, 23 ft above sea level, in United States. The nearest listed city is Roseburg, 45 mi away.

Topography around Coos Bay

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

Within 2 miles, the terrain around Coos Bay has only modest variations in elevation — a maximum elevation change of 600 ft around an average of 112 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,742 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,088 ft.

The land around Coos Bay is covered by trees (54%) and water (20%) within 2 miles, trees (65%) and water (23%) within 10 miles, and trees (64%) and water (27%) within 50 miles.

2 miles

600 ft

trees 54%

10 miles

1,742 ft

trees 65%

50 miles

4,088 ft

trees 64%

treesgrasslandartificial surfacesbare terrainwaterwetland

← July Coos Bay year-round climate September →Best places to visit in August

August weather nearby: Roseburg 45 mi · Eugene 74 mi · Springfield 76 mi · Grants Pass 78 mi · Central Point 95 mi · Corvallis 96 mi · Medford 99 mi · Albany 104 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 Coos Bay (43.3665°, -124.2179°, elevation 23 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	68	55
2	68	55
3	68	55
4	68	55
5	68	55
6	68	55
7	68	55
8	68	55
9	68	55
10	68	55
11	68	55
12	68	55
13	68	55
14	68	55
15	68	55
16	68	55
17	68	55
18	68	55
19	68	55
20	68	55
21	68	55
22	68	55
23	68	55
24	68	55
25	68	55
26	68	55
27	68	55
28	68	55
29	68	55
30	68	55
31	68	55

	Clearer (%)	Cloudier (%)
1	83	17
2	83	17
3	83	17
4	82	18
5	82	18
6	82	18
7	82	18
8	82	18
9	82	18
10	82	18
11	82	18
12	82	18
13	82	18
14	83	17
15	83	17
16	83	17
17	84	16
18	84	16
19	84	16
20	84	16
21	84	16
22	83	17
23	83	17
24	84	16
25	83	17
26	83	17
27	83	17
28	84	16
29	83	17
30	83	17
31	83	17

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

	Dry (%)	Comfortable (%)
1	70	30
2	70	30
3	69	31
4	68	32
5	67	33
6	66	34
7	65	35
8	64	36
9	63	37
10	63	37
11	62	38
12	62	38
13	61	39
14	61	39
15	61	39
16	62	38
17	62	38
18	63	37
19	63	37
20	64	36
21	65	35
22	65	35
23	66	34
24	67	33
25	67	33
26	68	32
27	68	32
28	69	31
29	69	31
30	70	30
31	70	30

	Avg high (°F)	Avg low (°F)
1	68	55
2	68	55
3	68	55
4	68	55
5	68	55
6	68	55
7	68	55
8	68	55
9	68	55
10	68	55
11	68	55
12	68	55
13	68	55
14	68	55
15	68	55
16	68	55
17	68	55
18	68	55
19	68	55
20	68	55
21	68	55
22	68	55
23	68	55
24	68	55
25	68	55
26	68	55
27	68	55
28	68	55
29	68	55
30	68	55
31	68	55

	Clearer (%)	Cloudier (%)
1	83	17
2	83	17
3	83	17
4	82	18
5	82	18
6	82	18
7	82	18
8	82	18
9	82	18
10	82	18
11	82	18
12	82	18
13	82	18
14	83	17
15	83	17
16	83	17
17	84	16
18	84	16
19	84	16
20	84	16
21	84	16
22	83	17
23	83	17
24	84	16
25	83	17
26	83	17
27	83	17
28	84	16
29	83	17
30	83	17
31	83	17

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

	Dry (%)	Comfortable (%)
1	70	30
2	70	30
3	69	31
4	68	32
5	67	33
6	66	34
7	65	35
8	64	36
9	63	37
10	63	37
11	62	38
12	62	38
13	61	39
14	61	39
15	61	39
16	62	38
17	62	38
18	63	37
19	63	37
20	64	36
21	65	35
22	65	35
23	66	34
24	67	33
25	67	33
26	68	32
27	68	32
28	69	31
29	69	31
30	70	30
31	70	30

	Avg high (°F)	Avg low (°F)
1	68	55
2	68	55
3	68	55
4	68	55
5	68	55
6	68	55
7	68	55
8	68	55
9	68	55
10	68	55
11	68	55
12	68	55
13	68	55
14	68	55
15	68	55
16	68	55
17	68	55
18	68	55
19	68	55
20	68	55
21	68	55
22	68	55
23	68	55
24	68	55
25	68	55
26	68	55
27	68	55
28	68	55
29	68	55
30	68	55
31	68	55

	Clearer (%)	Cloudier (%)
1	83	17
2	83	17
3	83	17
4	82	18
5	82	18
6	82	18
7	82	18
8	82	18
9	82	18
10	82	18
11	82	18
12	82	18
13	82	18
14	83	17
15	83	17
16	83	17
17	84	16
18	84	16
19	84	16
20	84	16
21	84	16
22	83	17
23	83	17
24	84	16
25	83	17
26	83	17
27	83	17
28	84	16
29	83	17
30	83	17
31	83	17

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

	Dry (%)	Comfortable (%)
1	70	30
2	70	30
3	69	31
4	68	32
5	67	33
6	66	34
7	65	35
8	64	36
9	63	37
10	63	37
11	62	38
12	62	38
13	61	39
14	61	39
15	61	39
16	62	38
17	62	38
18	63	37
19	63	37
20	64	36
21	65	35
22	65	35
23	66	34
24	67	33
25	67	33
26	68	32
27	68	32
28	69	31
29	69	31
30	70	30
31	70	30