Saint Peter Port weather in August

In August, Saint Peter Port sees average daytime highs of 17°C and overnight lows near 16°C, with 50 mm of rain across 8.6 wet days and about 14.2 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 17°C through the month. The sky is clear or mostly clear about 35% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 15 hours at the start of August to 13 h 24 min by month's end. Set against the rest of the year, August is Saint Peter Port's 2nd-clearest and 11th-windiest month. For the whole year in context, see Saint Peter Port's year-round climate.

Daytime high: 17°; 1st warmest
Overnight low: 16°; 12th coldest
Rainfall: 50 mm; 8.6 wet days
Daylight: 14 h 12 min; 5:07 AM – 7:21 PM
Cloud cover: 55%; 2nd clearest
Wind: 22 km/h; 11th windiest
Solar energy: 5.16 kWh/m²
Travel score: 5.9; out of 10

Saint Peter Port is parish, port, and capital of Guernsey in the Channel Islands.

Density: 2,537/km²; people per km²

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

← July Saint Peter Port 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 17°C through the month.

A typical August day in Saint Peter Port reaches about 17°C in the afternoon and slips back to 16°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 19°C. Set against its neighbours, August runs about 1°C warmer than July and on par with 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 (°C)	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17
Avg low (°C)	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16

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

Saint Peter Port weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	10° / 8°	98	15.7	8.4	1.8
Feb	9° / 7°	74	13.3	9.8	1.7
Mar	10° / 8°	58	11.5	11.5	2.0
Apr	11° / 9°	50	9.7	13.4	2.6
May	13° / 11°	45	7.9	15.1	3.6
Jun	15° / 13°	42	7.5	16	4.7
Jul	17° / 15°	36	6.9	15.6	5.7
Aug	17° / 16°	50	8.6	14.2	5.9
Sep	17° / 15°	57	9.4	12.4	5.5
Oct	15° / 14°	107	15	10.5	4.1
Nov	13° / 11°	121	17.7	8.9	2.8
Dec	11° / 9°	121	17	8	2.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 46%.

	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 (%)	57	56	56	56	55	55	54	54	54	54	53	53	53	53	53	53	53	52	52	52	53	53	53	54	54	55	55	55	55	56	56
Cloudier (%)	43	44	44	44	45	45	46	46	46	46	47	47	47	47	47	47	47	48	48	48	47	47	47	46	46	45	45	45	45	44	44

	Clearer (%)	Cloudier (%)
1	57	43
2	56	44
3	56	44
4	56	44
5	55	45
6	55	45
7	54	46
8	54	46
9	54	46
10	54	46
11	53	47
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	53	47
18	52	48
19	52	48
20	52	48
21	53	47
22	53	47
23	53	47
24	54	46
25	54	46
26	55	45
27	55	45
28	55	45
29	55	45
30	56	44
31	56	44

Chance of precipitation in August

Any precipitation

Saint Peter Port gets around 50 mm of rain over 8.6 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 28% and peaks near 30% 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 (%)	23	23	24	24	25	25	26	26	27	27	27	28	28	29	29	29	30	30	30	30	30	30	30	29	29	28	28	28	27	27	27

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

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 57% 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 (%)	12	13	13	14	14	15	15	16	16	17	17	18	18	18	19	19	19	20	20	21	22	24	25	26	27	29	30	31	33	34	35
Comfortable (%)	66	64	64	62	62	61	60	59	59	58	58	57	57	58	57	57	57	56	57	56	56	55	54	54	54	53	52	52	50	50	49
Humid (%)	22	23	23	24	24	24	25	25	25	25	25	25	25	24	24	24	24	24	23	23	22	21	21	20	19	18	18	17	17	16	16

	Dry (%)	Comfortable (%)	Humid (%)
1	12	66	22
2	13	64	23
3	13	64	23
4	14	62	24
5	14	62	24
6	15	61	24
7	15	60	25
8	16	59	25
9	16	59	25
10	17	58	25
11	17	58	25
12	18	57	25
13	18	57	25
14	18	58	24
15	19	57	24
16	19	57	24
17	19	57	24
18	20	56	24
19	20	57	23
20	21	56	23
21	22	56	22
22	24	55	21
23	25	54	21
24	26	54	20
25	27	54	19
26	29	53	18
27	30	52	18
28	31	52	17
29	33	50	17
30	34	50	16
31	35	49	16

Wind in August

Winds average 22 km/h in August.

Across August, daily wind ranges from about 21 km/h on the calmest days to 24 km/h 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 (km/h)	21	21	21	21	21	21	21	21	21	21	22	22	22	22	22	22	22	22	22	23	23	23	23	23	23	23	23	24	24	24	24
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 hours at the start of August to 13 h 24 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 4:46 AM to 5:30 AM, and sunset from 7:47 PM to 6:51 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)	15.0	15.0	14.9	14.9	14.8	14.8	14.7	14.7	14.6	14.6	14.5	14.5	14.4	14.3	14.3	14.2	14.2	14.1	14.1	14.0	13.9	13.9	13.8	13.8	13.7	13.7	13.6	13.5	13.5	13.4	13.4
Sunrise (AM)	4:46	4:47	4:48	4:50	4:51	4:53	4:54	4:55	4:57	4:58	5:00	5:01	5:03	5:04	5:06	5:07	5:09	5:10	5:12	5:13	5:15	5:16	5:18	5:19	5:21	5:22	5:24	5:25	5:27	5:28	5:30
Sunset (PM)	7:47	7:45	7:44	7:42	7:41	7:39	7:37	7:36	7:34	7:32	7:30	7:29	7:27	7:25	7:23	7:21	7:19	7:17	7:16	7:14	7:12	7:10	7:08	7:06	7:03	7:01	6:59	6:57	6:55	6:53	6:51

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	15.0	4:46	7:47
2	15.0	4:47	7:45
3	14.9	4:48	7:44
4	14.9	4:50	7:42
5	14.8	4:51	7:41
6	14.8	4:53	7:39
7	14.7	4:54	7:37
8	14.7	4:55	7:36
9	14.6	4:57	7:34
10	14.6	4:58	7:32
11	14.5	5:00	7:30
12	14.5	5:01	7:29
13	14.4	5:03	7:27
14	14.3	5:04	7:25
15	14.3	5:06	7:23
16	14.2	5:07	7:21
17	14.2	5:09	7:19
18	14.1	5:10	7:17
19	14.1	5:12	7:16
20	14.0	5:13	7:14
21	13.9	5:15	7:12
22	13.9	5:16	7:10
23	13.8	5:18	7:08
24	13.8	5:19	7:06
25	13.7	5:21	7:03
26	13.7	5:22	7:01
27	13.6	5:24	6:59
28	13.5	5:25	6:57
29	13.5	5:27	6:55
30	13.4	5:28	6:53
31	13.4	5:30	6:51

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.16 kWh/m².

For context, solar energy here swings from a low near 0.8 kWh/m² to a high of 6.39 kWh/m² in June across the year — August's 5.16 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)	5.8	5.7	5.7	5.7	5.6	5.6	5.5	5.5	5.5	5.4	5.4	5.3	5.3	5.2	5.2	5.2	5.1	5.1	5.0	5.0	4.9	4.9	4.9	4.8	4.8	4.8	4.7	4.7	4.6	4.6	4.6
Level	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	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.8	Bright
2	5.7	Bright
3	5.7	Bright
4	5.7	Bright
5	5.6	Bright
6	5.6	Bright
7	5.5	Bright
8	5.5	Bright
9	5.5	Bright
10	5.4	Bright
11	5.4	Bright
12	5.3	Bright
13	5.3	Bright
14	5.2	Bright
15	5.2	Bright
16	5.2	Bright
17	5.1	Bright
18	5.1	Bright
19	5.0	Bright
20	5.0	Bright
21	4.9	Bright
22	4.9	Bright
23	4.9	Bright
24	4.8	Bright
25	4.8	Bright
26	4.8	Bright
27	4.7	Bright
28	4.7	Bright
29	4.6	Bright
30	4.6	Bright
31	4.6	Bright

Planning a trip in August

Hazard calendar for Saint Peter Port

In seasonPeak

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

Saint Peter Port's rainy season runs September–March, 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 Saint Peter Port?

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

5.9

Sightseeing

1st-best month of the year

1.6

Beach & pool

1st-best month of the year

August is a reasonable time to visit Saint Peter Port for sightseeing.

What to pack for Saint Peter Port in August

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

In August, Saint Peter Port sees daytime highs around 17°C and nights near 16°C. Worth packing: rain gear, sun protection and a windbreaker. About 9 days see rain.

rain gearsun protectiona windbreaker

Sea temperature near Saint Peter Port in August

The nearest coast averages about 17°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in September at about 17°C and coldest in March near 9°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	10	10	9	10	12	14	16	17	17	16	14	12
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	10	Bracing
Feb	10	Bracing
Mar	9	Bracing
Apr	10	Bracing
May	12	Bracing
Jun	14	Bracing
Jul	16	Cool
Aug	17	Cool
Sep	17	Cool
Oct	16	Cool
Nov	14	Bracing
Dec	12	Bracing

UV index in Saint Peter Port 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 Saint Peter Port peaks around August 12 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

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

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

Location & terrain

Where is Saint Peter Port?

Saint Peter Port sits at 49.5°N, 2.5°W, 10 m above sea level, in Guernsey. The nearest listed city is Saint Helier, 43 km away.

Topography around Saint Peter Port

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint Peter Port.

Within 3 km, the terrain around Saint Peter Port has only modest variations in elevation — a maximum elevation change of 105 m around an average of 24 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 108 m; within 80 km, only modest variations in elevation — a maximum elevation change of 191 m.

The land around Saint Peter Port is covered by water (41%) and trees (25%) within 3 km, water (91%) within 16 km, and water (88%) within 80 km.

3 km

105 m

water 41%

16 km

108 m

water 91%

80 km

191 m

water 88%

treesgrasslandcroplandartificial surfaceswater

← July Saint Peter Port year-round climate September →Best places to visit in August

August weather nearby: Saint Helier 43 km · Octeville 67 km · Équeurdreville-Hainneville 67 km · Cherbourg 69 km · Tourlaville 73 km · Saint-Malo 98 km · Lannion 105 km · Saint-Brieuc 106 km

Guernsey travel facts

Power plugs: Type G; 230 V · 50 Hz

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 Saint Peter Port (49.4598°, -2.5353°, elevation 10 m), 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 (°C)	Avg low (°C)
1	17	16
2	17	16
3	17	16
4	17	16
5	17	16
6	17	16
7	17	16
8	17	16
9	17	16
10	17	16
11	17	16
12	17	16
13	17	16
14	17	16
15	17	16
16	17	16
17	17	16
18	17	16
19	17	16
20	17	16
21	17	16
22	17	16
23	17	16
24	17	16
25	17	16
26	17	16
27	17	16
28	17	16
29	17	16
30	17	16
31	17	16

	Clearer (%)	Cloudier (%)
1	57	43
2	56	44
3	56	44
4	56	44
5	55	45
6	55	45
7	54	46
8	54	46
9	54	46
10	54	46
11	53	47
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	53	47
18	52	48
19	52	48
20	52	48
21	53	47
22	53	47
23	53	47
24	54	46
25	54	46
26	55	45
27	55	45
28	55	45
29	55	45
30	56	44
31	56	44

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

	Dry (%)	Comfortable (%)	Humid (%)
1	12	66	22
2	13	64	23
3	13	64	23
4	14	62	24
5	14	62	24
6	15	61	24
7	15	60	25
8	16	59	25
9	16	59	25
10	17	58	25
11	17	58	25
12	18	57	25
13	18	57	25
14	18	58	24
15	19	57	24
16	19	57	24
17	19	57	24
18	20	56	24
19	20	57	23
20	21	56	23
21	22	56	22
22	24	55	21
23	25	54	21
24	26	54	20
25	27	54	19
26	29	53	18
27	30	52	18
28	31	52	17
29	33	50	17
30	34	50	16
31	35	49	16

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

	Clearer (%)	Cloudier (%)
1	57	43
2	56	44
3	56	44
4	56	44
5	55	45
6	55	45
7	54	46
8	54	46
9	54	46
10	54	46
11	53	47
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	53	47
18	52	48
19	52	48
20	52	48
21	53	47
22	53	47
23	53	47
24	54	46
25	54	46
26	55	45
27	55	45
28	55	45
29	55	45
30	56	44
31	56	44

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

	Dry (%)	Comfortable (%)	Humid (%)
1	12	66	22
2	13	64	23
3	13	64	23
4	14	62	24
5	14	62	24
6	15	61	24
7	15	60	25
8	16	59	25
9	16	59	25
10	17	58	25
11	17	58	25
12	18	57	25
13	18	57	25
14	18	58	24
15	19	57	24
16	19	57	24
17	19	57	24
18	20	56	24
19	20	57	23
20	21	56	23
21	22	56	22
22	24	55	21
23	25	54	21
24	26	54	20
25	27	54	19
26	29	53	18
27	30	52	18
28	31	52	17
29	33	50	17
30	34	50	16
31	35	49	16

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

	Clearer (%)	Cloudier (%)
1	57	43
2	56	44
3	56	44
4	56	44
5	55	45
6	55	45
7	54	46
8	54	46
9	54	46
10	54	46
11	53	47
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	53	47
18	52	48
19	52	48
20	52	48
21	53	47
22	53	47
23	53	47
24	54	46
25	54	46
26	55	45
27	55	45
28	55	45
29	55	45
30	56	44
31	56	44

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

	Dry (%)	Comfortable (%)	Humid (%)
1	12	66	22
2	13	64	23
3	13	64	23
4	14	62	24
5	14	62	24
6	15	61	24
7	15	60	25
8	16	59	25
9	16	59	25
10	17	58	25
11	17	58	25
12	18	57	25
13	18	57	25
14	18	58	24
15	19	57	24
16	19	57	24
17	19	57	24
18	20	56	24
19	20	57	23
20	21	56	23
21	22	56	22
22	24	55	21
23	25	54	21
24	26	54	20
25	27	54	19
26	29	53	18
27	30	52	18
28	31	52	17
29	33	50	17
30	34	50	16
31	35	49	16