Grand Cayman weather and climate in 2025
January
February
March
April
May
June
July
August
September
October
November
December
Overview
May
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Overview
June >
Grand Cayman weather and climate in 2025
January
February
March
April
May
June
July
August
September
October
November
December
Overview
May
< April
Overview
June >
Day
31 °C
Night
24 °C
Sea
28 °C
Precipitation
142 mm
in month
Rainy days
10 days
in month
Daylight
13 hours
average
Sunshine
8 hours
average
Humidity
80 %
Day
31 °C
Night
24 °C
Sea
28 °C
Precipitation
142 mm
in month
Rainy days
10 days
in month
Daylight
13 hours
average
Sunshine
8 hours
average
Humidity
80 %
Overview: Grand Cayman
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We make the most from 40 years of historical weather data to predict the best weather conditions.Weather overview for Grand Cayman
Weather overview
The Grand Cayman, one of the beautiful Cayman Islands, boasts a tropical climate with temperatures reaching their zenith in July at 32 °C (90 °F) during the day and the mercury drops to a balmy 22 °C (71 °F) in January at night. The driest spell is noted in April when the islands see only 5 days of rainfall, while September heralds the onset of the heaviest rains, soaking the land for 15 days. The alluring Caribbean Sea reaches its highest temperatures in September at 30 °C (85 °F), and exhibits its coolest touch in the fresh March waters at 26 °C (80 °F).
January weather
The minimum daytime temperatures recorded, noted at 28 °C (82 °F), grace Grand Cayman during January, while sea temperatures mildly decrease from the prior month. Dry season ushers in with fewer rainy days counted at 7 days. Nightly temperatures reach their lowest at 22 °C (71 °F), and the island begins to see a rise in the number of sunlit hours.
February weather
February in Grand Cayman sees a gentle upward trend in daytime temperatures and a decrease in rainy days to 6 days, while the total rainfall drops. Pending the onset of the dry season, it's an invitation for a pleasant holiday getaway.
March weather
Each day grows warmer in March in Grand Cayman, with temps averaging 30 °C (85 °F), and the sea holds steady at a mild 26 °C (80 °F). Rainy days continue their decline to 5 days, and the amount of received rainfall is at its nadir. An increase in sunshine hours can be observed, coinciding with peak wind speeds of 5.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.April weather
April's temperatures in Grand Cayman continue their ascent, reaching 31 °C (87 °F) during the day, and the sea gradually warms. The fewest rainy days are noted this month at 5 days, while April showers are on a modest upturn. Night temperatures begin their gentle rise, cresting at 23 °C (73 °F), with sunlight peaking at 10 hours.
May weather
May's warmth in Grand Cayman mirrors the previous month, with 31 °C (88 °F) by day and an upward trajectory in sea temperatures at 28 °C (82 °F). Rainy days see a minor increase, and the month's rainfall significantly ascends to 142 mm (5.60 in). Nighttime temperatures also rise, and sunlight hours begin a slight reduction.
June weather
Grand Cayman's waters warm further to 28 °C (83 °F) in June, while the evening climate keeps escalating to 25 °C (77 °F). The quantity of precipitation continues its climb, with 171 mm (6.74 in) noted, and days of rain tallying up to 13 days. The count of sunshine hours begins a downward trend, corresponding to the longest days of the year at 13 hours.
July weather
July observes the sea's temperature at a new high of 29 °C (84 °F) in Grand Cayman, while the peak of daytime heat is reached at 32 °C (90 °F). The quantity of rainy days begins to dwindle, represented by 12 days. The maximum nighttime temperature is also achieved, with more sunlight hours noticeable.
We make the most from 40 years of historical weather data to predict the best weather conditions.August weather
As August sees a reduction in rainfall volume to 159 mm (6.27 in) in Grand Cayman, ironically, the count of rainy days takes an upswing to 13 days.
September weather
September in Grand Cayman marks the zenith of rainy days at 15 days, while rainfall accumulation begins its rise, registering 202 mm (7.94 in). The sea's warmth caps at 30 °C (85 °F), with a reduction in sunlit hours. Wind speeds touch their minimum, indicating calmer weather conditions.
October weather
A gradual cooling trend begins in Grand Cayman during October, with sea temperatures initiating a descent. The maximum rainfall for the year can be observed during this month, alongside the highest humidity levels seen at 84 %.
November weather
November's chill is felt in Grand Cayman's sea, cooling to 28 °C (83 °F), and the daytime warmth starts to ease. The number of rainy days begins a downward trajectory, while a commencement in the rainfall volume decline is noted.
December weather
December in Grand Cayman watches the sea temp drop to 27 °C (81 °F), while daytime temperatures continue their decline. The rainy day count also falls, alongside a minor reduction in precipitation. The least amount of sunlit hours for the year is recorded.
FAQs
How many rainy days are expected in January in Grand Cayman?
You can expect about 7 days of rain in January in Grand Cayman, translating to roughly 25 % of the month.
Is February a good month for a vacation in Grand Cayman?
Absolutely, February in Grand Cayman offers excellent conditions with comfortably warm 29 °C (84 °F) by day and enticing 26 °C (80 °F) sea temperatures. With minimal rainfall, indicated by 6 days, bringing an umbrella may be an afterthought.
How comfortable is the weather in Grand Cayman during March?
March offers a comfortably warm climate in Grand Cayman, ideal for those who wish to bask in the warmth without feeling overwhelmed by heat.
How high do day temperatures get in Grand Cayman in April?
Expect daytime temperatures to average around 31 °C (87 °F) in April in Grand Cayman. This is ideal for beach days by the seaside or poolside lounging, but do remember hydration is key to combating the heat.
We make the most from 40 years of historical weather data to predict the best weather conditions.Does May mark the beginning of the wet season in Grand Cayman?
The month of May is not classified within the wet season, predicting a total of 10 days of rain.
What is the average duration of sunshine in June in Grand Cayman?
June in Grand Cayman averages around 8 hours of sunshine per day.
Can you describe the wind conditions for Grand Cayman during July?
Expect moderate winds in July in Grand Cayman, with average speeds around 4.
Is August considered a dry month in Grand Cayman?
August in Grand Cayman is far from dry, with rain anticipated on approximately 13 days throughout the month.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.What is the level of precipitation like during September in Grand Cayman?
September in Grand Cayman brings the highest rainfall with an average of 15 days receiving precipitation.
How humid is October in Grand Cayman?
October's humidity in Grand Cayman is quite high, averaging at 84 %. Though it could be uncomfortable for certain individuals, it is generally tolerable.
What is the typical nighttime temperature in Grand Cayman in November?
Nights in November in Grand Cayman typically see temperatures hovering around a pleasant 24 °C (75 °F). Ideal for evening activities or early morning exercise, a climate-control feature in accommodation would be beneficial.
What is the sea temperature like in Grand Cayman in December?
In December, Grand Cayman's sea temperature is invitingly warm at 27 °C (81 °F); perfect for extended aquatic adventures.