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Present Weather Conditions for
Tropical Storm Tracking for
Located 19.18°North and 81.22°West,
Grand Cayman, Cayman Islands enjoy mainly tropical weather
with slight seasonal variation. Climatically, the year divides
into two seasons - the summer or rainy season,
generally from mid-May
through October, and the dry, winter season, from November to April. The
mostly from the east-northeast in winter and east-southeast in
summer. The temperature in the Cayman Islands,
summer or winter, seldom goes
lower than 70°F or higher than 90°F with the daily average varying between
77°F and 84°F. The average relative humidity is a comfortable 77%.
averages 80° throughout the year.
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National Weather Service - Cayman Islands Government
Want to know
if rain is on the way?
Data from Grand
Cayman’s new Doppler radar weather system is now available for anyone to
The radar dish, which
is based in East End, resembles a giant soccer ball atop a concrete tower.
It sends out pulses
across a 250-mile radius, providing detailed
surveillance of weather affecting all three of the Cayman
Islands and the
The radar system,
which cost around $4.5 million to build and was funded largely through a
European Union grant,
officially opened in April. Meteorologists have been
able to access data from the system for several months and it will be used
help storm trackers keep a closer eye on hurricanes developing in the
The weather service
redesigned and relaunched its website last month to make some of that
information available to the public.
Visitors to the site,
www.weather.gov.ky, can view a map of the islands and the location and
intensity of areas of rainfall as far as 250 miles away.
“Our new website
represents the display, to the general public, of live ‘Weather Radar Data’
coming from Cayman’s own Doppler Weather Radar in East End.
“In addition, the site
also displays the full range of weather information for the Cayman Islands.
Thankfully, this greatly enhances our preparedness for the hurricane
season,” the weather service said in a press release.
The Cayman Islands is in the
northeast trade wind belt of the Caribbean and enjoys a stable climate.
Cool winter nights and hot summer days are the year-round norm,
influenced only occasionally by winter storms known as Nor'westers, or,
a tropical storm or hurricane threat every few years. Summer humidity
can be uncomfortable, but the cool sea breezes at night usually bring
Rainfall is seasonal, from May to
November, with May/June and September/October typically being the
wettest months. The driest months are usually February and March.
Rainfall is generally the result either tropical thunderstorms which
develop in the summer months, or, localized rain resulting from the
evaporation of water in the central mangroves of the main island.
"Tropical Waves" drift through the Caribbean in the summer months, often
depositing large amounts of rainfall before they dissipate. On occasion
they organize to form tropical storms or even hurricanes. Localized
rainfall usually results when the summer heat causes evaporation of
water in the central mangrove wetlands and rain clouds are formed. These
clouds generally drift to the west, depositing rain on the western side
of the island. The wettest day on record is November 30, 1993 with 7.8
inches. Although unconfirmed, it is said that a hurricane in 1909 dumped
an estimated 12 inches of rain in a 24 hour period.
January and February are the
coolest months with daytime high's in the upper 70's to low 80's and
nighttime low's in the mid 60's to low 70's. Summer temperatures peak in
July and August with daytime highs in the upper 80's to low 90's and
nighttime low's in the low 80's. High humidity in the summer months can
often make the days and nights feel hotter. On January 19th, 2000, we
registered a low temperature of 58°F, with no wind.
Occasional "Cold Fronts" pass
through the islands in the winter months, the remnants of more intense
winter weather moving south through the southeast US and northwest
Caribbean. If strong enough, the resulting local winter storms known as
Nor'westers may be accompanied by extremely rough seas which can cause
coastline damage and beach erosion.
Grand Cayman's tide table is based
on that of Galveston, Texas, minus 8 hours 1 minute. Spring tides range
from 10 to 12 inches and autumn/fall tides from 15 to 20 inches.