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Vitamin D in Cayman Islands: best months for sun and a travel guide

The best months for vitamin D in Cayman Islands are April, May, August, December to February. In May, a full dose of about 1,000 IU takes around 6 minutes at midday for skin type III at age 30, with 9.1 usable sun hours a day. For a beach stay it is rainy or stormy in March and from June to July and from September to November.

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Cayman Islands month by month

Cayman Islands is rated at its median coastal place, for skin type III at age 30. Click a month for the details.

MonthRatingSun windowPeak UVFull dose, age 30Full dose, age 65Afternoon highRainy days
JanuaryGood6.8 h6.48 min16 min28°C16/30
FebruaryExcellent7.2 h7.37 min14 min27°C12/30
MarchBad weather8.4 h8.66 min12 min29°C19/30
AprilExcellent8.8 h8.96 min11 min30°C14/30
MayExcellent9.1 h9.06 min11 min31°C11/30
JuneBad weather7.3 h7.47 min14 min30°C26/30
JulyBad weather8.8 h8.66 min12 min31°C20/30
AugustExcellent8.7 h8.76 min11 min32°C12/30
SeptemberBad weather7.6 h7.97 min13 min31°C24/30
OctoberBad weather7.2 h7.47 min14 min30°C18/30
NovemberBad weather6.1 h6.19 min16 min28°C21/30
DecemberGood5.8 h5.510 min18 min28°C16/30

Sun window is the number of hours a day with UV Index 2.5 or higher. Full dose is the minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, for skin type III. Rainy days are days with at least 1 mm out of 30.

Travel guide: why go to Cayman Islands

Why go

The Cayman Islands are a polished, safe island group with a seven-mile white beach and world-class diving.

Best for

Divers, couples and families who like comfort.

What to expect

A dry season from December to April, hot, wet and stormier weather from June to November, and high prices. English is spoken and driving is on the left.

Compare stays in Cayman Islands

Places in Cayman Islands

Each place has its own climate, so its best months can differ from the country as a whole.

George Town best: Excellent

Cruise port and capital with duty-free shops.

Best for short stays, shoppers

Best months April, May, August, December to February · Avoid rainy or stormy in March and from June to July and from September to November

The capital

Seven Mile Beach best: Excellent

Long white beach lined with resorts.

Best for couples, families

Best months April, May, August, December to February · Avoid rainy or stormy in March and from June to July and from September to November

Cayman Brac best: Excellent

Quiet sister island with bluffs and caves.

Best for divers, nature lovers

Best months July, August, December to May · Avoid rainy or stormy in June and from September to November

Stingray City best: Excellent

Shallow sandbar where friendly stingrays come to you.

Best for families, snorkellers

Best months April, May, August, December to February · Avoid rainy or stormy in March and from June to July and from September to November

West Bay best: Excellent

Home to the turtle centre and a quiet coast.

Best for families, locals-style travellers

Best months April, May, August, December to February · Avoid rainy or stormy in March and from June to July and from September to November

Some short descriptions come from Wikivoyage (CC BY-SA 4.0).

Questions about vitamin D in Cayman Islands

When is the best time to visit Cayman Islands for vitamin D?

The best months for vitamin D in Cayman Islands are April, May, August, December to February. In May, a full dose of about 1,000 IU takes around 6 minutes at midday for skin type III at age 30, with 9.1 usable sun hours a day.

Can you get vitamin D from the sun in Cayman Islands in December?

Yes, but slowly. In December a full dose takes about 10 minutes at midday for skin type III at age 30, with 5.8 usable hours a day.

How long do I need in the sun in Cayman Islands?

In May, the best month, about 6 minutes at midday with a quarter of the body bare, for skin type III at age 30; about 11 minutes at age 65. Darker skin needs longer and fair skin burns sooner, so keep sessions short. This is an estimate for planning, not medical advice.

Which months should I avoid in Cayman Islands?

For a beach stay, avoid the months when it is rainy or stormy in March and from June to July and from September to November.

What is the best place in Cayman Islands for vitamin D?

In May the strongest sun of the places we rate is around Cayman Brac. Each place has its own rating, so open the place list to compare them.

Plan by month

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Best places for vitamin D in May · Vitamin D explained