Antrim weather in August

In August, Antrim sees average daytime highs of 18°C and overnight lows near 12°C, with 84 mm of rain across 14.8 wet days and about 14.7 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 18°C through the month. The sky is clear or mostly clear about 4% of the time in August, and the air most often feels dry.

Daylight stretches from about 15 h 42 min at the start of August to 13 h 36 min by month's end. Set against the rest of the year, August is Antrim's 11th-clearest and 11th-windiest month. For the whole year in context, see Antrim's year-round climate.

Daytime high
18°
2nd warmest
Overnight low
12°
11th coldest
Rainfall
84 mm
14.8 wet days
Daylight
14 h 42 min
5:07 AM – 7:51 PM
Cloud cover
79%
11th clearest
Wind
13 km/h
11th windiest
Solar energy
3.77 kWh/m²
Travel score
4.9
out of 10

Antrim is town on the shore of Lough Neagh, in the baronies of Toome Upper and Toome Lower, Co. Antrim, in the northeast of Northern Ireland.

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 18°C through the month.

A typical August day in Antrim reaches about 18°C in the afternoon and slips back to 12°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 21°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)
11812
21812
31812
41812
51812
61812
71812
81812
91812
101812
111812
121812
131812
141812
151812
161812
171812
181812
191812
201812
211812
221812
231812
241811
251711
261711
271711
281711
291711
301711
311711

How August really feels in Antrim

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.

Antrim weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7314.21.47.60.9
Feb / 6112.61.49.31.1
Mar / 6213.90.911.51.7
Apr11° / 6513.70.213.72.6
May14° / 7014.50.115.83.6
Jun17° / 10°7714016.94.5
Jul18° / 12°8214.8016.55.0
Aug18° / 12°8414.8014.74.9
Sep16° / 10°6712.7012.54.4
Oct13° / 8113.8010.23.1
Nov10° / 7713.80.28.21.8
Dec / 7613.10.77.11.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11387
21387
31486
41486
51486
61486
71486
81585
91585
101585
111684
121684
131684
141684
151783
161783
171783
181684
191684
201783
211783
221882
231981
241981
251981
261981
271981
281981
291981
301981
312080

Chance of precipitation in August

Any precipitation

Antrim gets around 84 mm of rain over 14.8 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
150
250
350
449
549
649
748
848
948
1048
1148
1248
1348
1449
1549
1649
1750
1850
1950
2049
2149
2248
2348
2447
2546
2645
2744
2843
2943
3043
3142

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 67% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
161345
261345
362335
461336
561336
662326
762326
862326
962326
1062326
1163325
1263325
1364315
1464315
1565314
1665314
1766304
1867303
1968293
2069283
2171272
2272262
2372262
2473252
2574242
2675232
2777221
2877221
2978211
3077212
3178202

Wind in August

Winds average 13 km/h in August.

Across August, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3014light breeze
3114light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 42 min at the start of August to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 126 minutes over August. Sunrise moves from 4:40 AM to 5:36 AM, and sunset from 8:22 PM to 7:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.74:408:22
215.64:428:20
315.64:438:18
415.54:458:16
515.54:478:14
615.44:498:12
715.34:518:10
815.34:528:08
915.24:548:06
1015.14:568:04
1115.14:588:02
1215.05:008:00
1314.95:027:57
1414.95:047:55
1514.85:057:53
1614.75:077:51
1714.75:097:48
1814.65:117:46
1914.55:137:44
2014.45:157:41
2114.45:177:39
2214.35:197:36
2314.25:217:34
2414.25:227:32
2514.15:247:29
2614.05:267:27
2713.95:287:24
2813.95:307:22
2913.85:327:19
3013.75:347:17
3113.65:367:14

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.77 kWh/m².

For context, solar energy here swings from a low near 0.45 kWh/m² to a high of 4.99 kWh/m² in May across the year — August's 3.77 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.1Bright
34.1Bright
44.1Bright
54.0Bright
64.0Bright
74.0Moderate
84.0Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.8Moderate
143.8Moderate
153.8Moderate
163.8Moderate
173.7Moderate
183.7Moderate
193.7Moderate
203.7Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.4Moderate
303.3Moderate
313.3Moderate
Planning a trip in August

Is August a good time to visit Antrim?

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

4.9
Sightseeing
2nd-best month of the year
1.6
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Antrim for sightseeing.

What to pack for Antrim in August

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

In August, Antrim sees daytime highs around 18°C and nights near 12°C. Pack rain gear. About 15 days see rain.

rain gear

Sea temperature near Antrim in August

The nearest coast averages about 13°C 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 28 km away) is warmest in September at about 14°C and coldest in March near 8°C.

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

6°8°10°12°14°16°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr8Bracing
May9Bracing
Jun11Bracing
Jul12Bracing
Aug13Bracing
Sep14Bracing
Oct14Bracing
Nov12Bracing
Dec11Bracing

UV index in Antrim in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Antrim peaks around May 22 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 5 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowMay 22UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5Moderate
Jul5High
Aug5Moderate
Sep3Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Antrim?

Antrim sits at 54.7°N, 6.2°W, 33 m above sea level, in United Kingdom. The nearest listed city is Ballymena, 17 km away.

Topography around Antrim

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

Within 3 km, the terrain around Antrim has only modest variations in elevation — a maximum elevation change of 117 m around an average of 46 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 363 m; within 80 km, large variations in elevation — a maximum elevation change of 860 m.

The land around Antrim is covered by grassland (46%) and trees (22%) within 3 km, grassland (70%) within 16 km, and grassland (53%) and water (39%) within 80 km.

3 km
117 m
16 km
363 m
80 km
860 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Ballymena 17 km · Newtownabbey 20 km · Belfast 23 km · Lisburn 24 km · Carrickfergus 26 km · Castlereagh 26 km · Larne 29 km · Craigavon 32 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 Antrim (54.7175°, -6.211°, elevation 33 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).