Basseterre weather in August

In August, Basseterre sees average daytime highs of 28°C and overnight lows near 26°C, with 91 mm of rain across 17 wet days and about 12.6 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 51% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 12 h 48 min at the start of August to 12 h 24 min by month's end. Set against the rest of the year, August is Basseterre's 8th-clearest and 6th-windiest month. For the whole year in context, see Basseterre's year-round climate.

Daytime high
28°
1st warmest
Overnight low
26°
12th coldest
Rainfall
91 mm
17 wet days
Daylight
12 h 36 min
5:57 AM – 6:33 PM
Cloud cover
48%
8th clearest
Wind
26 km/h
6th windiest
Solar energy
6.4 kWh/m²
Travel score
5.5
out of 10

Basseterre is capital of Saint Kitts and Nevis.

Density
1,995/km²
people per km²
Founded
1627

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 28°C through the month.

A typical August day in Basseterre reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°C. Set against its neighbours, August runs on par with July and on par with September.

24°26°28°30°32°151015202531
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92826
102826
112826
122826
132826
142826
152826
162826
172826
182826
192826
202826
212826
222826
232826
242826
252826
262826
272826
282826
292826
302826
312826

How August really feels in Basseterre

Once humidity and wind are folded in, August averages 16 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
16
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Basseterre 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 daysDaylight (hours)Travel score
Jan26° / 24°3010.311.17.3
Feb25° / 24°217.311.47.7
Mar25° / 24°206.811.97.8
Apr26° / 25°338.512.47.3
May27° / 26°6111.912.86.4
Jun27° / 26°4710.9136.3
Jul28° / 26°7414.512.96.0
Aug28° / 26°911712.65.5
Sep28° / 26°11817.712.15.2
Oct28° / 26°12517.811.65.4
Nov27° / 26°10515.811.25.9
Dec26° / 25°5413.3116.6

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% 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 35%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
37030
47030
57030
67030
77030
86931
97030
107030
116931
126832
136832
146733
156733
166634
176535
186535
196436
206337
216337
226238
236139
246139
256139
266040
275941
285941
295842
305842
315743

Chance of precipitation in August

Any precipitation

Basseterre gets around 91 mm of rain over 17 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 55% and peaks near 56% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
153
253
353
454
554
654
754
854
955
1055
1155
1255
1356
1456
1556
1656
1756
1856
1956
2056
2156
2256
2356
2456
2556
2656
2755
2855
2955
3055
3154

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
16238
26139
36040
45941
55842
65743
75644
85545
95446
105347
115248
125149
135050
144951
154852
164753
174654
184654
194555
204555
214555
224555
234555
244555
254555
264555
274555
284654
294654
304753
314753

Wind in August

Winds average 26 km/h in August.

Across August, daily wind ranges from about 24 km/h on the calmest days to 27 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
127breezy
227breezy
327breezy
427breezy
527breezy
627breezy
727breezy
827breezy
927breezy
1026breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1626breezy
1726breezy
1826breezy
1926breezy
2025breezy
2125breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2724breezy
2824breezy
2924breezy
3024breezy
3124breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 h 48 min at the start of August to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over August. Sunrise moves from 5:53 AM to 6:00 AM, and sunset from 6:40 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:536:40
212.85:546:40
312.85:546:40
412.75:546:39
512.75:556:39
612.75:556:38
712.75:556:38
812.75:556:37
912.75:566:37
1012.75:566:36
1112.75:566:36
1212.65:566:35
1312.65:576:34
1412.65:576:34
1512.65:576:33
1612.65:576:33
1712.65:586:32
1812.65:586:31
1912.55:586:31
2012.55:586:30
2112.55:586:29
2212.55:596:29
2312.55:596:28
2412.55:596:27
2512.55:596:26
2612.45:596:26
2712.46:006:25
2812.46:006:24
2912.46:006:23
3012.46:006:22
3112.46:006:22

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.4 kWh/m².

For context, solar energy here swings from a low near 4.6 kWh/m² to a high of 6.71 kWh/m² in April across the year — August's 6.4 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in August

Hazard calendar for Basseterre

In seasonPeak

In August, Basseterre sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.

Basseterre sits in the Atlantic hurricane belt; the season peaks August–October.

Basseterre's rainy season runs July–November, when most of the year's rain falls.

Basseterre sees seasonal dust haze (July), heaviest in July.

Atlantic hurricane
Rainy season
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Basseterre?

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

5.5
Sightseeing
10th-best month of the year
5.9
Beach & pool
10th-best month of the year

August is a reasonable time to visit Basseterre for sightseeing.

What to pack for Basseterre in August

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

In August, Basseterre sees daytime highs around 28°C and nights near 26°C. Pack light clothes, rain gear and sun protection. Worth having: a windbreaker. About 17 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Basseterre in August

The nearest coast averages about 29°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 14 km away) is warmest in September at about 29°C and coldest in February near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb26Warm
Mar26Warm
Apr27Warm
May27Warm
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Basseterre in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Basseterre peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 10UV 13Dec 16UV 7
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7High

Air quality in Basseterre in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Basseterre is worst in June — around 25 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (December, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2225 µg/m³Dec 237 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb10Good
Mar9Good
Apr11Good
May15Moderate
Jun25Moderate
Jul25Moderate
Aug21Moderate
Sep16Moderate
Oct17Moderate
Nov10Good
Dec7Good
Location & terrain

Where is Basseterre?

Basseterre sits at 17.3°N, 62.7°W, -22 m above sea level, in Saint Kitts and Nevis. The nearest listed city is Gustavia, 68 km away.

Topography around Basseterre

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

Within 3 km, the terrain around Basseterre has significant variations in elevation — a maximum elevation change of 368 m around an average of 48 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,141 m; within 80 km, large variations in elevation — a maximum elevation change of 1,090 m.

The land around Basseterre is covered by water (40%), grassland (21%) and artificial surfaces (20%) within 3 km, water (81%) within 16 km, and water (98%) within 80 km.

3 km
368 m
16 km
1,141 m
80 km
1,090 m
treesshrubsgrasslandcroplandartificial surfaceswater
August weather nearby: Gustavia 68 km · Brades 78 km · Plymouth 85 km · Philipsburg 88 km · Marigot 94 km · St. John's 96 km · Codrington 103 km · Falmouth 105 km

Saint Kitts and Nevis travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / D / G
230 V · 60 Hz
Prices
≈ 69% of US
price level, 2025
GDP per capita
$25,223
2025
Homicide rate
64.2
per 100k, 2023
Income group
High
World Bank

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 Basseterre (17.2955°, -62.725°, elevation -22 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).