Harwich weather in August

In August, Harwich sees average daytime highs of 20°C and overnight lows near 15°C, with 62 mm of rain across 10.3 wet days and about 14.4 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 18% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 15 h 18 min at the start of August to 13 h 30 min by month's end. Set against the rest of the year, August is Harwich's 2nd-clearest and 10th-windiest month. For the whole year in context, see Harwich's year-round climate.

Daytime high
20°
1st warmest
Overnight low
15°
12th coldest
Rainfall
62 mm
10.3 wet days
Daylight
14 h 24 min
4:45 AM – 7:12 PM
Cloud cover
64%
2nd clearest
Wind
17 km/h
10th windiest
Solar energy
4.59 kWh/m²
Travel score
6.1
out of 10

Harwich is town in Essex, England.

Founded
1665

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 20°C through the month.

A typical August day in Harwich reaches about 20°C in the afternoon and slips back to 15°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 23°C. Set against its neighbours, August runs on par with July and about 2°C warmer than September.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12115
22115
32115
42115
52115
62115
72115
82115
92115
102015
112015
122015
132015
142015
152015
162015
172015
182015
192015
202015
212015
222015
232015
242015
252015
261915
271914
281914
291914
301914
311914

How August really feels in Harwich

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Harwich weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6012.20.88.10.9
Feb / 479.819.60.9
Mar / 4310.20.611.51.7
Apr11° / 419.3013.62.8
May14° / 10°519.7015.44.2
Jun17° / 12°5310.2016.45.4
Jul20° / 15°5711.40166.1
Aug20° / 15°6210.3014.46.1
Sep18° / 13°549.9012.45.6
Oct14° / 10°6711.7010.43.9
Nov10° / 6411.80.28.62.3
Dec / 6512.10.67.61.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34357
44357
54357
64258
74258
84159
94159
104159
114159
124159
134159
144159
154159
164060
173961
183961
193961
203862
213862
223862
233763
243763
253763
263763
273763
283763
293763
303763
313862

Chance of precipitation in August

Any precipitation

Harwich gets around 62 mm of rain over 10.3 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 34% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
335
435
535
635
735
835
935
1035
1136
1236
1336
1436
1536
1636
1736
1836
1935
2035
2134
2234
2333
2432
2532
2631
2731
2830
2929
3029
3129

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 41% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13245221
23345221
33345211
43344211
53444212
63443212
73543202
83542202
93642202
103641203
113741203
123740203
133740203
143840202
153840192
163840192
173941192
183941192
194041181
204041181
214141171
224240171
234340161
244539150
254639150
264838140
274938130
285137120
295137120
305336110
315436100

Wind in August

Winds average 17 km/h in August.

Across August, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3018light breeze
3118light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 18 min at the start of August to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 108 minutes over August. Sunrise moves from 4:21 AM to 5:10 AM, and sunset from 7:40 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.34:217:40
215.34:237:39
315.24:257:37
415.24:267:35
515.14:287:34
615.04:297:32
715.04:317:30
814.94:327:28
914.94:347:26
1014.84:367:24
1114.84:377:22
1214.74:397:21
1314.64:417:19
1414.64:427:17
1514.54:447:14
1614.44:457:12
1714.44:477:10
1814.34:497:08
1914.34:507:06
2014.24:527:04
2114.14:547:02
2214.14:557:00
2314.04:576:57
2413.94:596:55
2513.95:006:53
2613.85:026:51
2713.75:046:49
2813.75:056:46
2913.65:076:44
3013.55:096:42
3113.55:106:39

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.59 kWh/m².

For context, solar energy here swings from a low near 0.63 kWh/m² to a high of 5.63 kWh/m² in June across the year — August's 4.59 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.0Bright
65.0Bright
75.0Bright
84.9Bright
94.9Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.5Bright
184.5Bright
194.5Bright
204.4Bright
214.4Bright
224.3Bright
234.3Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.0Bright
294.0Bright
304.0Moderate
313.9Moderate
Planning a trip in August

Is August a good time to visit Harwich?

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

6.1
Sightseeing
1st-best month of the year
3.2
Beach & pool
1st-best month of the year

August is a reasonable time to visit Harwich for sightseeing.

What to pack for Harwich in August

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

In August, Harwich sees daytime highs around 20°C and nights near 15°C. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Harwich in August

The nearest coast averages about 18°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 August at about 18°C and coldest in February near 6°C.

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

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan7Bracing
Feb6Bracing
Mar7Bracing
Apr9Bracing
May12Bracing
Jun15Bracing
Jul17Cool
Aug18Cool
Sep17Cool
Oct15Bracing
Nov12Bracing
Dec9Bracing

UV index in Harwich 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 Harwich peaks around June 22 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 22UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May6High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Harwich?

Harwich sits at 51.9°N, 1.3°E, 1 m above sea level, in United Kingdom. The nearest listed city is Felixstowe, 5.0 km away.

Topography around Harwich

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

Within 3 km, the terrain around Harwich has only modest variations in elevation — a maximum elevation change of 28 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 63 m; within 80 km, only modest variations in elevation — a maximum elevation change of 153 m.

The land around Harwich is covered by water (56%) and artificial surfaces (22%) within 3 km, water (44%) and cropland (27%) within 16 km, and cropland (37%) and water (34%) within 80 km.

3 km
28 m
16 km
63 m
80 km
153 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Felixstowe 5.0 km · Walton-on-the-Naze 10 km · Frinton-on-Sea 13 km · Ipswich 16 km · Clacton-on-Sea 19 km · Colchester 27 km · Stowmarket 34 km · Sudbury 39 km

United Kingdom travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G / M
230 V · 50 Hz
Prices
≈ 89% of US
price level, 2025
GDP per capita
$57,602
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
3.2
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 60%none 26%Muslim 4%other 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 Harwich (51.9419°, 1.2844°, elevation 1 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).