West Bay in Fall
In fall (September, October and November), West Bay sees average daytime highs around 28°C and overnight lows near 26°C, with 462 mm of rain over about 51 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Over the season highs ease from about 29°C in early September to 27°C by late November. The sky is clear or mostly clear about 43% of the time across fall, and the air most often feels miserable.
Fall is West Bay's weakest season of the year to visit on our travel score. West Bay has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see West Bay's year-round climate.
- Avg daytime high
- 28°C
- 2nd-warmest season
- Avg overnight low
- 26°C
- Rainfall
- 462 mm
- 51 wet days
- Avg wind
- 22 km/h
- Travel score
- 5.2
- weakest season of the year
- Months
- Sep · Oct · Nov
Temperature in West Bay in Fall
Over the season highs ease from about 29°C in early September to 27°C by late November.
A typical fall day in West Bay reaches about 28°C and drops to 26°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in West Bay
Once humidity and wind are folded in, fall brings about 53 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
West Bay weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 25° | 28 | 6.6 | 11 | 7.7 |
| Feb | 26° / 25° | 13 | 2.8 | 11.3 | 8.4 |
| Mar | 26° / 25° | 16 | 3.9 | 11.9 | 8.3 |
| Apr | 27° / 26° | 18 | 3.7 | 12.4 | 8.0 |
| May | 28° / 26° | 95 | 11.2 | 12.9 | 6.5 |
| Jun | 28° / 27° | 104 | 13.2 | 13.1 | 5.4 |
| Jul | 29° / 27° | 60 | 12.3 | 13.1 | 5.4 |
| Aug | 29° / 27° | 93 | 15.3 | 12.7 | 5.0 |
| Sep | 29° / 27° | 139 | 18.6 | 12.1 | 4.5 |
| Oct | 28° / 27° | 214 | 20 | 11.6 | 4.7 |
| Nov | 27° / 26° | 108 | 12.1 | 11.1 | 6.4 |
| Dec | 26° / 25° | 44 | 8.5 | 10.9 | 7.2 |
Cloud cover in Fall
The sky is clear or mostly clear about 43% of the time across fall.
Chance of precipitation in Fall
West Bay gets around 462 mm of rain over 51 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 22 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early September to 10 h 54 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 5.0 kWh/m².
Hazard calendar for West Bay
In fall, West Bay overlaps its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.
West Bay sits in the Atlantic hurricane belt; the season peaks August–October.
West Bay's rainy season runs September–November, when most of the year's rain falls.
Is fall a good time to visit West Bay?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit West Bay for sightseeing.
What to pack for West Bay in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, West Bay sees daytime highs around 28°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 51 days see rain.
Sea temperature near West Bay in Fall
The nearest coast averages about 29°C across fall — 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 30°C and coldest in February near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 27 | 27 | 28 | 29 | 29 | 30 | 30 | 29 | 28 | 28 |
| Comfort | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 27 | Warm |
| May | 28 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 28 | Warm |
UV index in West Bay in Fall
Clear-sky midday UV across fall averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in West Bay peaks around May 13 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 12 | 12 | 12 | 12 | 11 | 11 | 12 | 10 | 8 | 7 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 12 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in West Bay in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in West Bay is worst in June — around 27 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (January, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 8 | 8 | 10 | 14 | 27 | 25 | 19 | 13 | 10 | 7 | 7 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 8 | Good |
| Mar | 8 | Good |
| Apr | 10 | Good |
| May | 14 | Moderate |
| Jun | 27 | Moderate |
| Jul | 25 | Moderate |
| Aug | 19 | Moderate |
| Sep | 13 | Moderate |
| Oct | 10 | Good |
| Nov | 7 | Good |
| Dec | 7 | Good |
Where is West Bay?
West Bay sits at 19.4°N, 81.4°W, 5 m above sea level, in Cayman Islands. The nearest listed city is George Town, 11 km away.
Topography around West Bay
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of West Bay.
Within 3 km, the terrain around West Bay has only modest variations in elevation — a maximum elevation change of 10 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 21 m; within 80 km, only modest variations in elevation — a maximum elevation change of 24 m.
The land around West Bay is covered by water (59%) within 3 km, water (91%) within 16 km, and water (97%) within 80 km.
Cayman Islands travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 113% of US
- price level, 2024
- GDP per capita
- $104,293
- 2024
- Homicide rate
- 4.4
- per 100k, 2020
- Income group
- High
- World Bank
- Religion
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 West Bay (19.382°, -81.3928°, elevation 5 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.