Kingston in May: Weather, Sea Temperature and How It Compares to April and June

KINGSTON · MAY · 17.99° N

May in Kingston averages 85.3°F by afternoon and 74.5°F before dawn, and drops 4.11 inches of rain across the month. April, four weeks earlier, manages 1.62 inches. The temperature barely moves between spring and early summer on this coast, while the rain multiplies by roughly two and a half. What comes with it is water at 84.6°F and a day that runs 13 hours and 2 minutes on the 15th.

You have already picked the city, so the question is the date. May hands you a sea 1.7°F warmer than April’s and charges 8.9 days of measurable rain for it. Where to sleep sits in the Kingston guide, the storm calendar in hurricane season, and the bag in what to pack.

On this page

• Kingston weather in May85.3°F days, 74.5°F nights, 8.9 wet days
• Sea temperature in May84.6°F off the harbor
• Crowds and prices in MayWhat we could verify, and what we could not
• Things to do in Kingston in MayThe Blue Mountains, Port Royal, the in-town museums
• A two-day Kingston planBuilt on a 5:32 am sunrise and a 6:34 pm sunset
• May compared with April and JuneHow the three months compare, in inches and degrees
• Is May a good time to visit Kingston?Yes for the water, with a rain caveat

Every figure here comes from a model grid cell centered on Kingston at 17.997° N, 76.794° W, on the island’s sheltered south coast. That is the drier side of Jamaica, and these numbers describe the harbor city and its hills. The north-shore resort strip reads differently, and the country calendar and the Montego Bay guide carry their own readings.

Kingston weather in May: average highs, lows and rain days

The 1991-2020 normals for May give Kingston an average high of 85.3°F, an average low of 74.5°F and 4.11 inches of precipitation. They come from Open-Meteo’s ECMWF ERA5 reanalysis, computed for the grid cell at 17.997° N, 76.794° W. No airport thermometer produced them, and a reanalysis can sit a few degrees off a station record, with the overnight low the most exposed of the two.

Rain reaches the gauge on 8.9 days in an average May, close to three days in ten, and 4.11 inches spread over those days averages just under half an inch each. That is an hour of serious water and then a street drying in the sun. The month’s total runs two and a half times April’s 1.62 inches, on more than double the number of wet days.

Between the 85.3°F afternoon and the 74.5°F small hours lies a spread of 10.8°F, a narrow day by continental standards. In practice that means one light layer: a rain shell for the 8.9 wet days and something with sleeves for an evening up the hill, where the temperature falls with altitude. The packing list covers the rest of the bag.

On May 15 the sun clears the horizon at 5:32 am and sets at 6:34 pm local time, 13 hours and 2 minutes apart, from the sunrise-sunset.org calculation for the city. Jamaica keeps one clock all year, so those hours shift only slightly across the month. Plan anything that needs daylight to finish by 6:30 pm, and treat 6 am as a usable start.

Can you swim in Kingston in May? Sea temperature at 84.6°F

The sea surface off Kingston averages 84.6°F in May in the Open-Meteo Marine API, taken as the mean of daily maxima over 2015-2024. That last detail matters: a mean of daily peaks runs a shade warmer than a figure averaged over 24 hours, so an early-morning swim will read slightly below the number above.

At 84.6°F there is no entry shock and no case for a wetsuit. The water sits within a degree of the average May afternoon air at 85.3°F, so stepping out costs you nothing in comfort, and an hour in is an hour of no consequence for an adult swimmer.

We found no wind or swell series for Kingston Harbour, so we give no figures on chop or surf. The swimming most visitors mean happens off the cays past Port Royal, at the far end of the airport spit, and we could not verify boat fares or departure times out there either. Ask at the dock the day before you want to go, and see getting around Jamaica for how the rest of the coast connects.

How busy is Kingston in May? Crowds and prices

We hold no occupancy series and no monthly room-rate series for Kingston, so we crown no month cheap or expensive. The only monthly series we have is climate, and it puts May above four inches of rain, ahead of both April and June. For what a Jamaica trip costs by category, our trip cost guide does that arithmetic, and flights from the US covers the airfare side.

Since 8.9 days in an average May record measurable rain, a refundable rate does more for you than an early one. Book the nights you cannot move, then leave one or two open if the trip depends on a clear morning on the water.

On the room tax, we could not verify Jamaica’s rate or how it lands on a Kingston hotel bill, so we give no percentage. The same goes for service charges added at checkout. What we can point you to is the practical paperwork side, in entry requirements and know before you go.

Pay up for one thing in May: a room with air conditioning you can test in the first five minutes. Nights average 74.5°F, only 10.8°F under the afternoon peak, so the city stays warm around the clock. A car or a hired driver takes the second line, because the road into the hills is where the month’s rain matters most. Driving in Jamaica and airport transfers set out both, and rates for either stayed unverified in our reading.

Things to do in Kingston in May

May puts 84.6°F water under a 13-hour day, a combination April cannot offer at 82.9°F and a shorter afternoon. It also keeps the nights 1.6°F below June’s 76.1°F, which is the difference between sleeping with the windows open and running the unit until dawn. The trade for both is the 8.9 wet days.

The Blue Mountains start at the city’s northern edge and climb fast, so a Kingston day can hold sea level and mountain air; our Blue Mountains guide covers the roads and the coffee estates. Port Royal sits at the end of the Palisadoes spit past the airport. Devon House, Hope Gardens, Emancipation Park and the Bob Marley Museum are the in-town names.

Across April, May and June the sea moves only 2.3°F, from 82.9°F to 85.2°F. The air swings 10.8°F between the May low and the May high, and that is what changes the outing: the mountain road at 7 am and the same road at 2 pm are two different mornings. Measurable rain on 8.9 days is the reason to take the hills early and hold the museums for the afternoon.

Walking costs nothing, and the 6:34 pm sunset on the 15th gives a long late-afternoon window for the harbor front and the streets around Emancipation Park. We found no dated May event in Kingston and no confirmed free-admission day at any museum, so we name none. The wider list lives in things to do in Jamaica.

Kingston in May: a two-day itinerary

Day one: up with the 5:32 am sunrise and onto the mountain road by 7, while the air still sits near the 74.5°F overnight low. Come back down for a late lunch in town, then keep 2 to 5 pm under a roof, since 8.9 days in an average May carry measurable rain and each wet day averages just under half an inch. Sunset lands at 6:34 pm, which leaves a full evening outdoors at a temperature a few degrees off the afternoon peak.

Day two goes to the water. At 84.6°F, a mean of daily maxima, the sea asks nothing of you at nine in the morning. The cays past Port Royal are the usual route out of the harbor, with fares and departures to confirm at the dock. If the sky turns, swap in the in-town museums and move the swim to the next dry morning. Only 0.6 day in an average May brings an inch or more, and the other wet days are half-inch affairs.

Kingston in May vs April and June

April, May and June sit within 1.4°F of each other on the afternoon high, at 85.0, 85.3 and 86.4°F. The nights separate them a little more: 72.6°F in April against 76.1°F in June, with May in between. The gap widens on rain. April takes 1.62 inches over 4.1 measurable days, May 4.11 inches over 8.9, June 3.17 inches over 7.3. The sea climbs steadily through the three, 82.9 to 84.6 to 85.2°F, each read as a mean of daily maxima.

Shift four weeks earlier and you gain 2.49 inches of dry sky and 4.8 fewer wet days, giving up 1.7°F of sea warmth and some evening light. Shift four weeks later and June returns 0.94 inch and 1.6 fewer wet days than May, with the warmest water of the three at 85.2°F, in exchange for nights at 76.1°F and a storm calendar that has its own page.

Is May a good time to visit Kingston?

May works if the trip is built around water and evenings: an 84.6°F sea, 13 hours and 2 minutes of daylight on the 15th, nights at 74.5°F. It works less well on a fixed seven-day window with every day booked outdoors, because 8.9 wet days in a 31-day month put the odds of a soaked afternoon close to three in ten.

If dry weeks matter more than warm water, take April: 1.62 inches, 4.1 measurable days, and a sea still at 82.9°F, only 1.7°F below May. Our April page runs the same figures in full, and the country calendar sets Kingston against the rest of the island.

Of the three months here, May moves the water most, adding 1.7°F on April while keeping nights 1.6°F below June’s 76.1°F.

The last word

Settle the room before anything else: at 74.5°F overnight, air conditioning that runs properly is worth more in May than any tour, and it is the one thing you can test in the first five minutes. Then read the rain the way the record does. Only 0.6 day in an average May delivers an inch or more, so most wet days pass in half an inch and a bright street afterward. Pack the shell, hold your mornings free, and check the marine reading the week you fly.

Sources & data for this guide

• May air normals, 85.3°F high / 74.5°F low / 4.11 in · Open-Meteo, ECMWF ERA5 1991-2020 for the grid cell at 17.997° N, 76.794° W · checked Sep 20, 2026 · model reanalysis, with no airport station record behind it
• Wet days, 8.9 at 0.10 in or more and 0.6 at 1 in or more · same ERA5 series · checked Sep 20, 2026
• Sea surface 84.6°F, mean of daily maxima 2015-2024 · Open-Meteo Marine API · checked Sep 20, 2026
• Daylight of 13 h 02 on May 15, sunrise 10:32 UTC and sunset 23:34 UTC converted to Jamaica time · sunrise-sunset.org · checked Sep 20, 2026
• April and June figures in the comparison table, air from the same ERA5 series, sea from the Open-Meteo Marine API · checked Sep 20, 2026
• We could not verify occupancy, room rates, the lodging-tax rate, museum admissions and hours, boat fares off Port Royal or any dated May event in Kingston, so we quote no figures for them.
• The grid cell sits over Kingston on the sheltered south coast, and our figures carry no information about the north shore.

To plan your stay

• Kingston vs Montego Bay: Weather, Daylight, Room Tax and Ticket Prices
• Best Time to Visit Kingston: Weather, Sea Temperature and the Quiet Months
• Kingston in April: Weather, Rain Days, Sea Temperature and Heritage Sites
• Kingston in June: Weather, Sea Temperature, Crowds and Things to Do

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