Port Antonio in March: Weather, Sea Temperature, Rain Days and a Two-Day Plan

JAMAICA · PORT ANTONIO IN MARCH · 18.18° N

Port Antonio in March runs afternoon highs of 80.4°F and nights of 72.2°F. The sea off town is warmer than both, at 81.8°F. March is also wetter than both its neighbors: 3.81 inches of rain, against 2.63 in February and 2.58 in April.

If you have already picked Port Antonio for your trip, the March question is about the calendar. You need to know how many wet days to plan around, and whether moving four weeks either way buys a drier or warmer vacation. For where to sleep and how to fly in, lean on our Jamaica where-to-stay guide and flights from the US.

On this page

• Port Antonio weather in March80.4°F highs, 72.2°F lows and 8.6 wet days
• Can you swim in Port Antonio in March?Sea at 81.8°F in daily maxima
• Crowds, room rates and lodging tax in MarchWhat we could verify before you book
• Things to do in Port Antonio in MarchFort George, Folly Point and the Blue and John Crow Mountains
• A two-day Port Antonio itineraryTwo days around a 6:16 p.m. sunset
• March vs February and AprilHow the three months compare on rain and sea
• Is March a good time to visit?Who March suits, and the month to pick instead

Every figure here comes from a model reanalysis computed for the grid cell at 18.18°N, 76.45°W, over Port Antonio at the wet north-eastern end of the island. Our climate source reads that corner as the rainiest in Jamaica, so these numbers belong to Port Antonio alone and should not be carried to Negril or Kingston. For the island-wide calendar, see the best time to visit Jamaica.

Port Antonio weather in March: average highs, lows and rain days

The 1991-2020 normals give March an average high of 80.4°F and an average low of 72.2°F, with 3.81 inches of precipitation. They are ERA5 reanalysis values served by Open-Meteo: a weather model’s reconstruction for the grid cell over town. No airport station thermometer sits behind them, so treat them as a close reading of the area rather than a measurement at one spot.

In an average March, 8.6 days record at least 0.10 inch of rain, a little more than one day in four. Only 0.3 day reaches an inch or more, roughly one heavy day every three Marches. On a seven-night trip that works out to about two wet days, and on nearly all of them the total stays under an inch.

From the 80.4°F afternoon to the 72.2°F night, the spread is 8.2°F. Pack for warm weather around the clock: light cotton, a thin long-sleeve layer for air-conditioned rooms and a packable rain shell for the wet days. A sweater can stay home. Our Jamaica packing list covers the rest of the bag.

On March 15 the sun rises at 6:12 a.m. and sets at 6:16 p.m. local time (UTC-5), for about 12 hours 5 minutes of daylight. Plan outdoor sightseeing to wrap up by 6 p.m., and book dinner for after dark.

Can you swim in Port Antonio in March? Sea temperature and what it feels like

Yes. The sea surface off Port Antonio averages 81.8°F in March, according to the Open-Meteo Marine API over 2015-2024. That figure is the mean of daily maxima, the warmest reading of each day, so a 24-hour average would come out a shade lower.

At 81.8°F, the water sits 1.4°F above the average afternoon high and 9.6°F above the 72.2°F night low. A midday swim feels close to the air temperature. Get in early in the morning or right after sunset and the water feels warm against the cooler air.

We could not verify wind or swell data for Port Antonio in March, so we give no wave height and no calm-sea pattern. Check the marine forecast when you arrive, and ask your hotel which shore is sheltered that day before you head out.

How busy is Port Antonio in March? Crowds and prices

We found no occupancy series and no monthly room-rate data for Port Antonio, so we place March in no price ranking against the other eleven months. To build a daily budget for the island, start with our Jamaica trip-cost guide.

Without a rate series, we won’t name a number of weeks to book ahead. The weather data does support one comparison: April is 1.23 inches drier and its sea runs 1.1°F warmer. Price the same room for a March week and an April week before you commit, and take a refundable rate if the two quotes land close. Getting from the airport is a separate step, covered in our airport-transfers guide.

We could not verify the lodging-tax rate for Port Antonio hotels, so we give no percentage. Before you pay a deposit, ask whether the quoted nightly rate includes taxes and service charges.

With 8.6 wet days in an average March, the upgrade that changes the trip is a room with a covered veranda or balcony. A shower then means an hour outside under a roof, with the sea still in view.

Things to do in Port Antonio in March

March afternoons average 80.4°F, 1.7°F under April’s. That margin helps on walking days in town and on a climb inland. Rain comes on 8.6 days, so leave one flexible slot in the itinerary for the day that turns wet.

The Titchfield Peninsula was the first place in the area settled by the English and holds Fort George, along with DeMontevin Lodge, an eclectic Victorian building. The Court House went up in 1895, and Christ Church, the Portland Parish Church, stands on land indentured on September 3, 1836. Folly Point Lighthouse dates from 1888, its masonry tower built fireproof. Inland, the Blue and John Crow Mountains became Jamaica’s first UNESCO World Heritage site in 2015: 26,251.6 hectares (about 64,900 acres), rising from 850 m to 2,256 m (roughly 2,790 to 7,400 feet).

The sea barely moves around March: it holds within 1.5°F, from 81.4°F in February to 82.9°F in April. The air shifts more, from a 79.7°F average high in February to 80.4°F in March and 82.1°F in April, a 2.4°F rise. Walk Fort George and Folly Point in the morning or after 4 p.m., and expect the mountain air to cool as the road climbs above 850 m.

The Jamaica National Heritage Trust publishes no opening hours or admission fees for these sites, and we found none elsewhere, so we cannot confirm which ones cost nothing. We found no Rio Grande raft rate either. The peninsula’s streets are public, and you can see the exteriors of DeMontevin Lodge and the 1895 Court House from them.

Port Antonio in March: a two-day itinerary

Day one stays in town. Start at 7 a.m., under an hour after the 6:12 sunrise, with Fort George and DeMontevin Lodge on the Titchfield Peninsula during the coolest part of the day. Walk to the Court House and Christ Church before late morning. Swim from noon, when the 81.8°F sea runs close to the 80.4°F high, then reach Folly Point Lighthouse around 5 p.m. to catch it before the 6:16 p.m. sunset.

Day two goes inland, to the Blue and John Crow Mountains or to Moore Town. A Colonel governs Moore Town today, an honorary title his ancestors won, and UNESCO inscribed its Maroon heritage on the intangible-heritage list in 2008. Leave by 7 a.m. with a driver or a rental car (see driving in Jamaica). If the morning turns wet, swap in the town sites from day one and move the mountains to the next dry morning.

Port Antonio in March vs February and April

February averages 79.7°F highs, 72.0°F lows and 2.63 inches over 7.7 wet days, with the sea at 81.4°F. March climbs to 80.4°F and 72.2°F but takes 3.81 inches over 8.6 days, with the sea at 81.8°F. April reaches 82.1°F and 73.5°F on 2.58 inches over 7.6 days, and the Marine API puts its sea at 82.9°F.

Moving four weeks earlier to February costs 0.7°F of afternoon warmth and 0.4°F of sea, and buys 1.18 fewer inches of rain and about one fewer wet day. Moving to April gains 1.7°F in the afternoon, 1.1°F in the water and 1.23 fewer inches of rain, with nights 1.3°F warmer. We could not verify how room prices shift between the three, so compare quotes before you change the dates.

Is March a good time to visit Port Antonio?

Yes for swimmers and walkers who can shrug off a shower: the sea averages 81.8°F, and days with an inch or more of rain average 0.3 per March. No if a dry week is the point of the vacation. March carries 3.81 inches, while February and April both stay under 2.7.

If the answer is no, pick April: 2.58 inches over 7.6 wet days, 82.1°F highs and a sea at 82.9°F. February is nearly as dry at 2.63 inches but cooler, with 79.7°F highs. Both months have their own guide: Port Antonio in April and Port Antonio in February.

Of the three months, March holds the middle: afternoons 0.7°F warmer than February’s and 1.7°F cooler than April’s, with a sea within 0.4°F of February’s and 1.1°F under April’s.

The last word

Book March if warm water matters more to you than a dry forecast, and keep one day of the trip open for rain. Save a morning for the road west of town too: Orange Bay Railway Station shows Jamaica Georgian features, and Seaman’s Valley holds the ruins of a great house and the first European cemetery in the area.

Sources & data for Port Antonio in March

• March normals, rain days, February and April air normals · Open-Meteo / ECMWF ERA5 model reanalysis, 1991-2020, grid cell 18.1789N 76.4522W · checked Sep 24, 2026 · a model reconstruction for the cell over town; no station thermometer sits behind these values
• Sea surface temperature for February, March and April (mean of daily maxima) · Open-Meteo Marine API, 2015-2024 average · checked Sep 24, 2026
• Sunrise, sunset and daylight on March 15 · sunrise-sunset.org · checked Sep 24, 2026 · converted from UTC to local time (UTC-5)
• Titchfield Peninsula, Fort George, Court House, Folly Point Lighthouse, DeMontevin Lodge, Christ Church, Moore Town, Orange Bay Railway Station, Seaman’s Valley · Jamaica National Heritage Trust, Portland Heritage Sites · checked Sep 24, 2026
• Blue and John Crow Mountains and Moore Town Maroon heritage · UNESCO World Heritage Centre, property 1356 · checked Sep 24, 2026
• What we could not verify · opening hours, admission fees, Rio Grande raft rates, wind and swell, room-rate or occupancy series, lodging-tax rate · checked Sep 24, 2026 · we give no figure for any of them

To plan your stay

• Port Antonio: When to Go, When to Swim and Which Month to Avoid
• Port Antonio in February: Weather, Sea Temperature and Things to Do
• Port Antonio in April: Weather, Sea Temperature and Rain Days
• Port Antonio in January: Weather, Sea Temperature, Rain Days and Things to Do

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• Blue Mountains, Jamaica: Peak Hikes, Coffee Farms and the Two Ways In
• Kingston, Jamaica: The Bob Marley Museum, Devon House and Trench Town
• Dunns River Falls: Tickets, Timing and How to Beat the Cruise Crowds