Best time to visit Grand Cayman

Month-by-month weather averages for Grand Cayman.

Grand Cayman, Cayman Islands

°C

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Average daily high and low
Precipitation
Good month
Best month
Made good or best by an event

Average daily high and low temperature, average precipitation and each month's verdict
Month	Average daily high	Average daily low	Precipitation	Verdict
January	26.1 °C / 79 °F	25 °C / 77 °F	25 mm / 1 in	good month
February	26.1 °C / 79 °F	24.9 °C / 77 °F	16 mm / 0.6 in	good month
March	26.3 °C / 79 °F	25.1 °C / 77 °F	18 mm / 0.7 in	good month
April	27 °C / 81 °F	25.8 °C / 78 °F	22 mm / 0.9 in	good month
May	27.8 °C / 82 °F	26.4 °C / 80 °F	88 mm / 3.5 in	neither best nor good
June	28.4 °C / 83 °F	27 °C / 81 °F	116 mm / 4.6 in	neither best nor good
July	29 °C / 84 °F	27.5 °C / 82 °F	63 mm / 2.5 in	neither best nor good
August	29.3 °C / 85 °F	27.6 °C / 82 °F	93 mm / 3.7 in	neither best nor good
September	29.1 °C / 84 °F	27.4 °C / 81 °F	110 mm / 4.3 in	neither best nor good
October	28.5 °C / 83 °F	26.7 °C / 80 °F	196 mm / 7.7 in	neither best nor good
November	27.5 °C / 82 °F	26.1 °C / 79 °F	127 mm / 5 in	neither best nor good
December	26.9 °C / 80 °F	25.6 °C / 78 °F	45 mm / 1.8 in	good month

Good and best months depend on more than temperature, rain and events. How they are chosen

Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:

Daytime highs
Night-time lows
How warm it feels
Humidity
How much of the day is sunny
Hours of daylight
Monthly rainfall
How many days it rains
Days of heavy rain
Wind
Snowfall and days with snow
Major events, such as festivals

The chart shows the good and best months for exploring outdoors.

The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.

Best months by activity

Exploring outdoors

Mild days and nights, mostly dry and bright. The default for 'when should I go'.

JJanuary: good
FFebruary: good
MMarch: good
AApril: good
MMay: neither
JJune: neither
JJuly: neither
AAugust: neither
SSeptember: neither
OOctober: neither
NNovember: neither
DDecember: good

Good: December–April

Why these months

January · good
In its favour: feels like (high) 27.6 °C / 82 °F, precipitation 25 mm / 1 in, share of daylight that is sunny 94%, average daily high 26.1 °C / 79 °F, days with heavy rain 0.2 days, wet days 7.1 days, relative humidity 76%.
Against: average daily low 25 °C / 77 °F.
February · good
In its favour: feels like (high) 28 °C / 82 °F, precipitation 16 mm / 0.6 in, share of daylight that is sunny 93%, average daily high 26.1 °C / 79 °F, wet days 4.8 days, days with heavy rain 0.1 days, relative humidity 76%.
Against: average daily low 24.9 °C / 77 °F.
March · good
In its favour: feels like (high) 28.6 °C / 83 °F, precipitation 18 mm / 0.7 in, share of daylight that is sunny 92%, average daily high 26.3 °C / 79 °F, wet days 4.8 days, days with heavy rain 0.1 days, relative humidity 76%.
Against: average daily low 25.1 °C / 77 °F.
April · good
In its favour: precipitation 22 mm / 0.9 in, share of daylight that is sunny 96%, average daily high 27 °C / 81 °F, feels like (high) 30.5 °C / 87 °F, wet days 5.7 days, days with heavy rain 0.3 days.
Against: average daily low 25.8 °C / 78 °F, relative humidity 78%.
December · good
In its favour: feels like (high) 28.4 °C / 83 °F, precipitation 45 mm / 1.8 in, share of daylight that is sunny 94%, average daily high 26.9 °C / 80 °F, days with heavy rain 1.1 days, wet days 9.3 days.
Against: average daily low 25.6 °C / 78 °F, relative humidity 77%.

Beach and swimming

Hot, dry and sunny. Penalises the monsoon hard.

JJanuary: best
FFebruary: best
MMarch: best
AApril: best
MMay: good
JJune: neither
JJuly: good
AAugust: good
SSeptember: good
OOctober: neither
NNovember: neither
DDecember: best

Best: December–April
Good: May, July–September

Why these months

January · best
In its favour: average daily high 26.1 °C / 79 °F, precipitation 25 mm / 1 in, share of daylight that is sunny 94%, feels like (high) 27.6 °C / 82 °F, days with heavy rain 0.2 days, wet days 7.1 days, average daily low 25 °C / 77 °F.
Against: wind (daily max) 31 km/h / 19 mph.
February · best
In its favour: average daily high 26.1 °C / 79 °F, precipitation 16 mm / 0.6 in, share of daylight that is sunny 93%, feels like (high) 28 °C / 82 °F, days with heavy rain 0.1 days, wet days 4.8 days, average daily low 24.9 °C / 77 °F, wind (daily max) 30 km/h / 19 mph.
March · best
In its favour: average daily high 26.3 °C / 79 °F, precipitation 18 mm / 0.7 in, share of daylight that is sunny 92%, feels like (high) 28.6 °C / 83 °F, days with heavy rain 0.1 days, wet days 4.8 days, average daily low 25.1 °C / 77 °F, wind (daily max) 29 km/h / 18 mph.
April · best
In its favour: average daily high 27 °C / 81 °F, precipitation 22 mm / 0.9 in, share of daylight that is sunny 96%, feels like (high) 30.5 °C / 87 °F, days with heavy rain 0.3 days, wet days 5.7 days, average daily low 25.8 °C / 78 °F, wind (daily max) 26 km/h / 16 mph.
May · good
In its favour: average daily high 27.8 °C / 82 °F, share of daylight that is sunny 92%, feels like (high) 32 °C / 90 °F, precipitation 88 mm / 3.5 in, days with heavy rain 2.8 days, average daily low 26.4 °C / 80 °F, wind (daily max) 25 km/h / 15 mph.
Against: wet days 12.5 days.
July · good
In its favour: average daily high 29 °C / 84 °F, share of daylight that is sunny 94%, precipitation 63 mm / 2.5 in, feels like (high) 34.2 °C / 94 °F, days with heavy rain 1.3 days, wind (daily max) 25 km/h / 15 mph, average daily low 27.5 °C / 82 °F.
Against: wet days 12.6 days.
August · good
In its favour: average daily high 29.3 °C / 85 °F, share of daylight that is sunny 93%, feels like (high) 34.6 °C / 94 °F, precipitation 93 mm / 3.7 in, days with heavy rain 2.1 days, wind (daily max) 25 km/h / 15 mph, average daily low 27.6 °C / 82 °F.
Against: wet days 15.5 days.
September · good
In its favour: average daily high 29.1 °C / 84 °F, share of daylight that is sunny 89%, feels like (high) 34.4 °C / 94 °F, days with heavy rain 2.6 days, wind (daily max) 22 km/h / 14 mph, average daily low 27.4 °C / 81 °F.
Against: wet days 16.8 days, precipitation 110 mm / 4.3 in.
December · best
In its favour: average daily high 26.9 °C / 80 °F, precipitation 45 mm / 1.8 in, share of daylight that is sunny 94%, feels like (high) 28.4 °C / 83 °F, days with heavy rain 1.1 days, average daily low 25.6 °C / 78 °F.
Against: wet days 9.3 days, wind (daily max) 32 km/h / 20 mph.

An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Sugar Mountain Resort, 1871 km away.

Weather averages

Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Feels like (high)	27.6 °C	28 °C	28.6 °C	30.5 °C	32 °C	32.9 °C	34.2 °C	34.6 °C	34.4 °C	32.5 °C	29.7 °C	28.4 °C
Days with heavy rain	0.2 days	0.1 days	0.1 days	0.3 days	2.8 days	3 days	1.3 days	2.1 days	2.6 days	6.6 days	3.5 days	1.1 days
Time rain usually falls	4 am	3 am	7 am	6 am	3 am	4 am	6 am	8 am	3 am	11 pm	2 pm	4 am
Sunshine per day	10.5 h	10.7 h	11.1 h	12.1 h	12.1 h	11.6 h	12.4 h	11.8 h	10.9 h	10 h	9.9 h	10.3 h
Relative humidity	76%	76%	76%	78%	80%	82%	80%	80%	80%	81%	78%	77%
Wet days	7.1 days	4.8 days	4.8 days	5.7 days	12.5 days	14.5 days	12.6 days	15.5 days	16.8 days	20.8 days	14.8 days	9.3 days
Daylight per day	11.1 h	11.5 h	12 h	12.6 h	13.1 h	13.3 h	13.2 h	12.8 h	12.2 h	11.7 h	11.2 h	11 h
Days with snow	0 days	0 days	0 days	0 days	0 days	0 days	0 days	0 days	0 days	0 days	0 days	0 days
Snowfall	0 cm	0 cm	0 cm	0 cm	0 cm	0 cm	0 cm	0 cm	0 cm	0 cm	0 cm	0 cm
Wind (daily mean)	26 km/h	25 km/h	24 km/h	21 km/h	20 km/h	22 km/h	20 km/h	19 km/h	17 km/h	20 km/h	26 km/h	27 km/h
Wind gusts (daily max)	42 km/h	41 km/h	40 km/h	36 km/h	35 km/h	37 km/h	35 km/h	35 km/h	32 km/h	37 km/h	42 km/h	43 km/h

Sea temperature

Averaged over a shorter period (2022–2025) than the twenty-year averages above.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature 2022–2025	27.5 °C	27.1 °C	27.4 °C	28 °C	29.1 °C	29.5 °C	29.9 °C	30.6 °C	30.8 °C	30.4 °C	29.2 °C	28.3 °C
Sea temperature (daily max) 2022–2025	27.6 °C	27.1 °C	27.6 °C	28.1 °C	29.3 °C	29.7 °C	30.1 °C	30.8 °C	31 °C	30.5 °C	29.3 °C	28.4 °C

Very cold 10 °C or less
Cold 10 to 15 °C
Cool 15 to 20 °C
Comfortable 20 to 25 °C
Warm 25 to 28 °C
Very warm over 28 °C

The words describe how the water feels to swim in. They are ours, not an official standard.

Air quality

Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Air pollution (PM2.5) 2022–2025	8.3 µg/m³	9.1 µg/m³	9.4 µg/m³	8.4 µg/m³	7.9 µg/m³	12.9 µg/m³	14.7 µg/m³	10.1 µg/m³	6.9 µg/m³	6.4 µg/m³	6.4 µg/m³	6.6 µg/m³
Air pollution (PM2.5, daily peak) 2022–2025	10.2 µg/m³	11.2 µg/m³	11.8 µg/m³	10.2 µg/m³	10 µg/m³	16.8 µg/m³	19.9 µg/m³	13.4 µg/m³	9.1 µg/m³	8.3 µg/m³	8.2 µg/m³	8.4 µg/m³

Good 15 µg/m³ or less
Fair 15 to 25 µg/m³
Moderate 25 to 37.5 µg/m³
Poor 37.5 to 50 µg/m³
Very poor 50 to 75 µg/m³
Extremely poor over 75 µg/m³

Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.