CastriesSt. Lucia · Caribbean · Year-round overview
BeachHiking

Castries

St. Lucia · Caribbean

Castries is most comfortable in the drier months around January to March. Typical daytime highs run about 82-86°F year-round. The climate is warm and humid. Rainy season runs roughly June to November.

Best time to go
Castries travel scene
12 mo · Typical year
Temperature range
75°F to 86°F
Rain
15 days/mo
Sunshine
11.2 h/day
Humidity feel
Humid year-round
When to visit

Month-by-month fit

Temperature

Hot by day, warm at night.

85°Ftypical Aug high
65°70°75°80°85°90°HighLow86°F82°F79°F75°FJanMarMayJulSepNovCurrent month · 85°F
Typical range

Precipitation

Rain most days.

71%wet-day frequency
012345678Amount (in)0%25%50%75%100%19%JanMarMayJulSepNovCurrent month · 71%71%
AmountWet-day chance

Sunshine

Cloudier spells limit sunshine.

11.4 hAug sunshine
0 h4 h8 h12 h16 hJanMarMayJulSepNovCurrent month · 11.4 h11.4 h

Heat & humidity by month

Hot afternoons occur, with humid air through much of the month.

80%Aug share of humid air hours
0%25%50%75%100%80% Humid air98% Humid airJanMarMayJulSepNov
Easy airWarm airHumid airVery humid air

Hourly comfort pattern

In August, afternoons feel about 87° and nights feel near 82°.

January 12 AM - 76° (Warm) - NighttimeJanuary 1 AM - 76° (Warm) - NighttimeJanuary 2 AM - 75° (Warm) - NighttimeJanuary 3 AM - 75° (Warm) - NighttimeJanuary 4 AM - 75° (Comfortable) - NighttimeJanuary 5 AM - 75° (Comfortable) - NighttimeJanuary 6 AM - 76° (Warm) - NighttimeJanuary 7 AM - 76° (Warm)January 8 AM - 77° (Warm)January 9 AM - 77° (Warm)January 10 AM - 78° (Warm)January 11 AM - 79° (Warm)January 12 PM - 79° (Warm)January 1 PM - 80° (Warm)January 2 PM - 80° (Warm)January 3 PM - 79° (Warm)January 4 PM - 79° (Warm)January 5 PM - 78° (Warm)January 6 PM - 78° (Warm)January 7 PM - 77° (Warm) - NighttimeJanuary 8 PM - 77° (Warm) - NighttimeJanuary 9 PM - 77° (Warm) - NighttimeJanuary 10 PM - 77° (Warm) - NighttimeJanuary 11 PM - 76° (Warm) - NighttimeFebruary 12 AM - 75° (Comfortable) - NighttimeFebruary 1 AM - 75° (Comfortable) - NighttimeFebruary 2 AM - 75° (Comfortable) - NighttimeFebruary 3 AM - 74° (Comfortable) - NighttimeFebruary 4 AM - 74° (Comfortable) - NighttimeFebruary 5 AM - 74° (Comfortable) - NighttimeFebruary 6 AM - 75° (Warm) - NighttimeFebruary 7 AM - 75° (Warm)February 8 AM - 76° (Warm)February 9 AM - 77° (Warm)February 10 AM - 78° (Warm)February 11 AM - 79° (Warm)February 12 PM - 79° (Warm)February 1 PM - 79° (Warm)February 2 PM - 79° (Warm)February 3 PM - 79° (Warm)February 4 PM - 78° (Warm)February 5 PM - 77° (Warm)February 6 PM - 77° (Warm)February 7 PM - 77° (Warm)February 8 PM - 77° (Warm) - NighttimeFebruary 9 PM - 76° (Warm) - NighttimeFebruary 10 PM - 76° (Warm) - NighttimeFebruary 11 PM - 75° (Warm) - NighttimeMarch 12 AM - 76° (Warm) - NighttimeMarch 1 AM - 76° (Warm) - NighttimeMarch 2 AM - 76° (Warm) - NighttimeMarch 3 AM - 76° (Warm) - NighttimeMarch 4 AM - 75° (Warm) - NighttimeMarch 5 AM - 75° (Comfortable) - NighttimeMarch 6 AM - 76° (Warm) - NighttimeMarch 7 AM - 77° (Warm)March 8 AM - 77° (Warm)March 9 AM - 78° (Warm)March 10 AM - 79° (Warm)March 11 AM - 80° (Warm)March 12 PM - 80° (Warm)March 1 PM - 81° (Warm)March 2 PM - 81° (Warm)March 3 PM - 80° (Warm)March 4 PM - 80° (Warm)March 5 PM - 79° (Warm)March 6 PM - 78° (Warm)March 7 PM - 78° (Warm)March 8 PM - 77° (Warm) - NighttimeMarch 9 PM - 77° (Warm) - NighttimeMarch 10 PM - 77° (Warm) - NighttimeMarch 11 PM - 76° (Warm) - NighttimeApril 12 AM - 78° (Warm) - NighttimeApril 1 AM - 78° (Warm) - NighttimeApril 2 AM - 78° (Warm) - NighttimeApril 3 AM - 78° (Warm) - NighttimeApril 4 AM - 78° (Warm) - NighttimeApril 5 AM - 77° (Warm) - NighttimeApril 6 AM - 79° (Warm)April 7 AM - 79° (Warm)April 8 AM - 80° (Warm)April 9 AM - 81° (Warm)April 10 AM - 81° (Warm)April 11 AM - 82° (Warm)April 12 PM - 83° (Warm)April 1 PM - 83° (Warm)April 2 PM - 83° (Warm)April 3 PM - 82° (Warm)April 4 PM - 82° (Warm)April 5 PM - 81° (Warm)April 6 PM - 80° (Warm)April 7 PM - 80° (Warm)April 8 PM - 79° (Warm) - NighttimeApril 9 PM - 79° (Warm) - NighttimeApril 10 PM - 79° (Warm) - NighttimeApril 11 PM - 79° (Warm) - NighttimeMay 12 AM - 81° (Warm) - NighttimeMay 1 AM - 80° (Warm) - NighttimeMay 2 AM - 80° (Warm) - NighttimeMay 3 AM - 80° (Warm) - NighttimeMay 4 AM - 80° (Warm) - NighttimeMay 5 AM - 80° (Warm) - NighttimeMay 6 AM - 81° (Warm)May 7 AM - 81° (Warm)May 8 AM - 82° (Warm)May 9 AM - 83° (Warm)May 10 AM - 84° (Warm)May 11 AM - 84° (Warm)May 12 PM - 85° (Hot)May 1 PM - 85° (Hot)May 2 PM - 85° (Hot)May 3 PM - 84° (Hot)May 4 PM - 84° (Warm)May 5 PM - 83° (Warm)May 6 PM - 82° (Warm)May 7 PM - 82° (Warm)May 8 PM - 82° (Warm) - NighttimeMay 9 PM - 81° (Warm) - NighttimeMay 10 PM - 81° (Warm) - NighttimeMay 11 PM - 81° (Warm) - NighttimeJune 12 AM - 81° (Warm) - NighttimeJune 1 AM - 81° (Warm) - NighttimeJune 2 AM - 80° (Warm) - NighttimeJune 3 AM - 80° (Warm) - NighttimeJune 4 AM - 80° (Warm) - NighttimeJune 5 AM - 80° (Warm) - NighttimeJune 6 AM - 81° (Warm)June 7 AM - 82° (Warm)June 8 AM - 82° (Warm)June 9 AM - 83° (Warm)June 10 AM - 84° (Warm)June 11 AM - 84° (Warm)June 12 PM - 85° (Hot)June 1 PM - 85° (Hot)June 2 PM - 84° (Hot)June 3 PM - 84° (Warm)June 4 PM - 84° (Warm)June 5 PM - 83° (Warm)June 6 PM - 82° (Warm)June 7 PM - 82° (Warm)June 8 PM - 82° (Warm) - NighttimeJune 9 PM - 81° (Warm) - NighttimeJune 10 PM - 81° (Warm) - NighttimeJune 11 PM - 81° (Warm) - NighttimeJuly 12 AM - 81° (Warm) - NighttimeJuly 1 AM - 81° (Warm) - NighttimeJuly 2 AM - 81° (Warm) - NighttimeJuly 3 AM - 81° (Warm) - NighttimeJuly 4 AM - 81° (Warm) - NighttimeJuly 5 AM - 80° (Warm) - NighttimeJuly 6 AM - 82° (Warm)July 7 AM - 82° (Warm)July 8 AM - 83° (Warm)July 9 AM - 83° (Warm)July 10 AM - 84° (Warm)July 11 AM - 85° (Hot)July 12 PM - 85° (Hot)July 1 PM - 85° (Hot)July 2 PM - 85° (Hot)July 3 PM - 85° (Hot)July 4 PM - 84° (Hot)July 5 PM - 84° (Warm)July 6 PM - 84° (Warm)July 7 PM - 83° (Warm)July 8 PM - 83° (Warm) - NighttimeJuly 9 PM - 82° (Warm) - NighttimeJuly 10 PM - 82° (Warm) - NighttimeJuly 11 PM - 82° (Warm) - NighttimeAugust 12 AM - 83° (Warm) - NighttimeAugust 1 AM - 83° (Warm) - NighttimeAugust 2 AM - 83° (Warm) - NighttimeAugust 3 AM - 82° (Warm) - NighttimeAugust 4 AM - 82° (Warm) - NighttimeAugust 5 AM - 82° (Warm) - NighttimeAugust 6 AM - 83° (Warm)August 7 AM - 84° (Warm)August 8 AM - 84° (Hot)August 9 AM - 85° (Hot)August 10 AM - 86° (Hot)August 11 AM - 87° (Hot)August 12 PM - 87° (Hot)August 1 PM - 87° (Hot)August 2 PM - 87° (Hot)August 3 PM - 87° (Hot)August 4 PM - 87° (Hot)August 5 PM - 86° (Hot)August 6 PM - 85° (Hot)August 7 PM - 85° (Hot)August 8 PM - 84° (Hot) - NighttimeAugust 9 PM - 84° (Warm) - NighttimeAugust 10 PM - 84° (Warm) - NighttimeAugust 11 PM - 83° (Warm) - NighttimeSeptember 12 AM - 84° (Hot) - NighttimeSeptember 1 AM - 84° (Warm) - NighttimeSeptember 2 AM - 84° (Warm) - NighttimeSeptember 3 AM - 84° (Warm) - NighttimeSeptember 4 AM - 83° (Warm) - NighttimeSeptember 5 AM - 83° (Warm) - NighttimeSeptember 6 AM - 84° (Hot) - NighttimeSeptember 7 AM - 85° (Hot)September 8 AM - 86° (Hot)September 9 AM - 87° (Hot)September 10 AM - 87° (Hot)September 11 AM - 88° (Hot)September 12 PM - 89° (Hot)September 1 PM - 89° (Hot)September 2 PM - 89° (Hot)September 3 PM - 88° (Hot)September 4 PM - 88° (Hot)September 5 PM - 87° (Hot)September 6 PM - 86° (Hot)September 7 PM - 86° (Hot)September 8 PM - 86° (Hot) - NighttimeSeptember 9 PM - 85° (Hot) - NighttimeSeptember 10 PM - 85° (Hot) - NighttimeSeptember 11 PM - 85° (Hot) - NighttimeOctober 12 AM - 83° (Warm) - NighttimeOctober 1 AM - 83° (Warm) - NighttimeOctober 2 AM - 83° (Warm) - NighttimeOctober 3 AM - 83° (Warm) - NighttimeOctober 4 AM - 83° (Warm) - NighttimeOctober 5 AM - 83° (Warm) - NighttimeOctober 6 AM - 84° (Warm) - NighttimeOctober 7 AM - 84° (Hot)October 8 AM - 85° (Hot)October 9 AM - 86° (Hot)October 10 AM - 87° (Hot)October 11 AM - 87° (Hot)October 12 PM - 88° (Hot)October 1 PM - 88° (Hot)October 2 PM - 88° (Hot)October 3 PM - 87° (Hot)October 4 PM - 86° (Hot)October 5 PM - 85° (Hot)October 6 PM - 85° (Hot)October 7 PM - 85° (Hot) - NighttimeOctober 8 PM - 84° (Hot) - NighttimeOctober 9 PM - 84° (Hot) - NighttimeOctober 10 PM - 84° (Warm) - NighttimeOctober 11 PM - 84° (Warm) - NighttimeNovember 12 AM - 81° (Warm) - NighttimeNovember 1 AM - 81° (Warm) - NighttimeNovember 2 AM - 81° (Warm) - NighttimeNovember 3 AM - 81° (Warm) - NighttimeNovember 4 AM - 81° (Warm) - NighttimeNovember 5 AM - 80° (Warm) - NighttimeNovember 6 AM - 82° (Warm) - NighttimeNovember 7 AM - 82° (Warm)November 8 AM - 83° (Warm)November 9 AM - 83° (Warm)November 10 AM - 84° (Hot)November 11 AM - 85° (Hot)November 12 PM - 85° (Hot)November 1 PM - 85° (Hot)November 2 PM - 85° (Hot)November 3 PM - 85° (Hot)November 4 PM - 84° (Warm)November 5 PM - 83° (Warm)November 6 PM - 83° (Warm)November 7 PM - 83° (Warm) - NighttimeNovember 8 PM - 82° (Warm) - NighttimeNovember 9 PM - 82° (Warm) - NighttimeNovember 10 PM - 82° (Warm) - NighttimeNovember 11 PM - 81° (Warm) - NighttimeDecember 12 AM - 78° (Warm) - NighttimeDecember 1 AM - 78° (Warm) - NighttimeDecember 2 AM - 78° (Warm) - NighttimeDecember 3 AM - 78° (Warm) - NighttimeDecember 4 AM - 78° (Warm) - NighttimeDecember 5 AM - 77° (Warm) - NighttimeDecember 6 AM - 79° (Warm) - NighttimeDecember 7 AM - 79° (Warm)December 8 AM - 79° (Warm)December 9 AM - 80° (Warm)December 10 AM - 81° (Warm)December 11 AM - 82° (Warm)December 12 PM - 82° (Warm)December 1 PM - 82° (Warm)December 2 PM - 82° (Warm)December 3 PM - 82° (Warm)December 4 PM - 81° (Warm)December 5 PM - 80° (Warm)December 6 PM - 80° (Warm)December 7 PM - 80° (Warm) - NighttimeDecember 8 PM - 80° (Warm) - NighttimeDecember 9 PM - 79° (Warm) - NighttimeDecember 10 PM - 79° (Warm) - NighttimeDecember 11 PM - 79° (Warm) - Nighttime12 AM6 AM12 PM6 PM11 PMJanFebMarAprMayJunJulAugSepOctNovDec
ComfortableWarmHotNight shading

Sea temperature

84°Aug sea temp
78°82°86°80°JanMarMayJulSepNovCurrent month · 84°84°
More detailIncludes sky, daypart comfort, and wind

Cloud cover

Partly cloudy across the month.

45%Aug clear sky
0%25%50%75%100%65%JanMarMayJulSepNovCurrent month · 45%45%
ClearCloud cover
Typical August day

August late afternoons are around 84°F, easing to about 81°F in early evening.

Avg temp Typical range
Morning83°F
Feels 86°F
Rain45%
Cloud55%
Humid airVery high
Sun intensityModerate
Midday85°F
Feels 87°F
Rain49%
Cloud58%
Humid airVery high
Sun intensityStrong
Late afternoon84°F
Feels 87°F
Rain45%
Cloud58%
Humid airVery high
Sun intensityModerate
Early evening81°F
Feels 85°F
Rain25%
Cloud51%
Humid airVery high
Sun intensityMinimal
Best window

Wind pattern

August's typical breeze keeps the air from feeling as stagnant.

11 mphAug Breezy
0 mph5 mph10 mph15 mph20 mph25 mph14 mphJanMarMayJulSepNovCurrent month · 11 mph11 mph
Typical wind speed (mph)

Similar

Similar things to doSt. JohnUS Virgin IslandsSimilar things to doEl NidoPhilippinesSimilar things to doLabuan BajoIndonesiaSimilar things to doSanta MartaColombia

Want a side-by-side climate view? Compare Castries with St. John.

Climate data notePlanning guidance, not a forecast

Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.

Local microclimates can vary by beach, neighborhood, trail, or elevation.

Last updated: Jun 1, 2026

Data & methodology