NEGRIL · SEPTEMBER · 18.27° N
The sea off Negril runs 88.9°F in September, the warmest of the three late-summer months, and the same page of the calendar carries 4.43 inches of rain and the statistical peak of the Atlantic hurricane season on the 10th. That pairing decides almost everything about a September vacation here: swimming is never the question, and the flight you book should be one you can move.
What you trade for the warm water is certainty. Seven Mile Beach is at its quietest, seats from the US are easy to find on short notice, and the sand at eight in the morning can be close to yours alone. Measurable rain falls on roughly two days in five, and a named storm anywhere in the western Caribbean can rearrange a week. Refundable rates and travel insurance are what this month costs.
THE MONTH AT A GLANCE · NEGRIL · SEPTEMBER
September buys the warmest water of the three late-summer months and a beach with room on it, at the cost of 11.8 wet days and a trip booked inside the hurricane season’s peak week.
SEA 88.9°F · 11.8 RAIN DAYS · STORM PEAK SEPTEMBER 10 · SUNSET 6:16 PM
Go for: bath-warm water at 88.9°F, a low-season beach, and short-notice flights into Montego Bay.
Think twice before: booking September non-refundable, or fixing a wedding week around September 10.
Climate: Open-Meteo ERA5 reanalysis, 1991-2020 · Sea: Open-Meteo Marine · Storms: NOAA NHC · full sources at the end
On this page
- Negril weather in SeptemberHighs of 85.8°F and 11.8 rain days
- Sea temperature in September88.9°F at the surface
- Crowds, prices and when to bookLow season inside the storm window
- Things to do in Negril in SeptemberSeven Mile Beach, the West End cliffs, Royal Palm Reserve
- A two-day Negril itineraryTwo days built around a 6:16 pm sunset
- September vs August and OctoberHow the three months compare, in one table
- Is September a good time to visit Negril?Our verdict, and the month to switch to
- Hurricane risk by month in JamaicaThe season month by month
Every figure here comes from one of four places: ERA5 reanalysis for the grid cell over Negril (1991-2020), the Open-Meteo Marine series for sea surface, sunrise-sunset.org for daylight, and NOAA’s National Hurricane Center for the storm calendar. None of the temperatures below is an airport station reading, and we repeat that where it changes how you should read them.
Negril weather in September: average highs, lows and rain days
| Measure | Negril in September |
|---|---|
| Average high | 85.8°F |
| Average low | 78.7°F |
| Precipitation | 4.43 in |
| Days with 0.10 in or more | 11.8 |
| Sea surface (mean of daily maxima) | 88.9°F |
| Daylight on September 15 | 12h 16m |
Those normals come from ERA5, the ECMWF reanalysis, computed over the grid cell at 18.2683° N, 78.3475° W for 1991-2020. It is a model’s reconstruction of the air above Negril rather than a thermometer at an airport, and the two can part company by a degree or more on the overnight low. Read 85.8°F by day and 78.7°F before dawn as the shape of the month, not as a number you could check against a station log.
Measurable rain shows up on 11.8 days in an average September, about two days in five. Spread 4.43 inches across those days and a typical wet day holds a little over a third of an inch, which is a shower you wait out under a bar roof rather than a day written off. Plan the week around the count instead of the total: most days of the month record no measurable rain at all.
Day and night are 7.1 degrees apart, and that gap barely moves. Nothing in the suitcase needs to be warm. Pack a rain shell that folds to nothing, two swimsuits so one is always dry, and shoes you can rinse in the sea. Our Jamaica packing list covers the rest, including what the humidity does to anything made of leather.
On September 15 the sun rises at 6:00 in the morning and sets at 6:16 in the evening, 12 hours and 16 minutes apart. Jamaica keeps one clock all year, so there is no stretched northern evening to count on. Dinner on West End Road happens after dark, and any boat trip you want to finish in daylight has to be back at the dock before a quarter past six.
Can you swim in Negril in September? The sea averages 88.9°F
That 88.9°F is a ten-year average for 2015-2024 from the Open-Meteo Marine series, and it is the mean of daily maxima rather than a round-the-clock average, so it reads a shade warmer than the water you meet at seven in the morning. Against August’s 88.7°F and October’s 88.4°F, September takes the three-month high by a fraction of a degree that no swimmer will ever detect.
At that temperature the sea stops being a decision. Children stay in until somebody makes them come out, snorkeling off Long Bay needs nothing but a mask, and there is no gasp on entry at any hour of the day. The catch is that 88.9°F water does not cool you down, which makes shade rather than the sea the thing to build a midday around.
We could not verify a wind or swell series for Negril in September, so we give no figures for either. What we can date is the storm calendar: NOAA’s National Hurricane Center runs the Atlantic season from June 1 to November 30, with the peak on September 10 and most activity between mid-August and mid-October. Surf is a forecast question rather than a normals question, and our hurricane page carries the monthly risk.
How busy is Negril in September? Crowds, prices and when to book
September sits in the low season for calendar reasons more than weather ones: American school terms have restarted, and the month falls inside a hurricane window that runs to November 30. Those two facts, not the rain, are why the beach is quieter than it was in July. We found no occupancy or room-rate series for Negril, so we crown no month the cheapest and quote no percentage off.
Book the refundable rate even when the non-refundable one winks at you. Lead times are short in September, and four to six weeks ahead is usually enough for a room and a seat (est.). Spend your attention on the change rules instead. Flights from the US land at Montego Bay, and the Negril leg is a road transfer at the end of a long day, so a delayed arrival costs you daylight as well as patience. Our transfer guide lays out the options.
We could not verify Jamaica’s lodging-tax rate or the tax line resorts add at checkout, so we give no percentage. Ask for the all-in total including taxes and any resort fee at the time you book, then compare those totals rather than the advertised nightly rate. Our Jamaica trip-cost guide handles the wider budget.
One line of the budget genuinely repays an upgrade this month, and it is the roof. A property with a covered terrace, an indoor restaurant and a bar with walls turns 11.8 wet days into background noise, while a cheaper room with an open-air dining deck turns every shower into a negotiation. Look at the restaurant photographs for walls before you reserve.
Things to do in Negril in September: Seven Mile Beach, the West End cliffs and Royal Palm Reserve
The month’s edge over its neighbors is small and it is entirely aquatic: 88.9°F is the warmest of the three, and the beach is thin enough that a long swim involves dodging nobody. Anything that depends on being in the water rather than near it works better now than in August or October. Anything that depends on a dry sky has a worse month than August.
Seven Mile Beach runs north through Long Bay and Bloody Bay, with the sea at 88.9°F along all of it and public access points worth locating before you set out. West End Road follows the limestone cliffs south to the Negril Lighthouse. Booby Cay lies offshore from Bloody Bay and is reached by boat. Inland, the Royal Palm Reserve occupies part of the Great Morass. We could not verify current admission prices or opening hours for the lighthouse or the reserve, so we quote none: our things-to-do guide has the wider list.
The sea barely registers the calendar, moving half a degree between September and October, so the air does all the seasonal work. At 85.8°F by day the cliff stone is hot from mid-morning, and the ladder into the water is the comfortable way out of the sun until the 6:16 pm sunset takes the heat off. In the morass, September’s 4.43 inches mean standing water and insects at the Royal Palm Reserve, which makes it a first-hour errand rather than a two-in-the-afternoon one.
Free in September is what is free in any month here: the sand, the water, and the sunset from a cliff bar where the purchase is a drink and not a ticket. We found no evidence that a Negril attraction waives admission for the low season, so build no plan around one.
Negril in September: a two-day itinerary
Day one runs on the 6:00 am sunrise. Walk the beach and take the first swim before eight, eat afterward, then go back in while the sand is still barefoot-friendly. From noon to three, move under a roof or under palms, because 85.8°F with September humidity stops being pleasant. Back in the sea around four, then west to the cliffs for the 6:16 pm sunset, with dinner after dark on West End Road.
Day two takes the boat to Booby Cay or the snorkeling off Bloody Bay in the morning and keeps the afternoon uncommitted. If the sky closes in, flip the plan inland: the morass handles rain better than the beach does, and the drive out to the reserve fills the hour a shower needs to pass. With rain on 11.8 days out of 30, a two-day stay has better-than-even odds of catching one.
Negril in September vs August and October
| Measure | August | September | October |
|---|---|---|---|
| Average high | 86.6°F | 85.8°F | 84.2°F |
| Average low | 78.9°F | 78.7°F | 77.8°F |
| Precipitation | 3.37 in | 4.43 in | 4.39 in |
| Days with 0.10 in or more | 10.2 | 11.8 | 11.9 |
| Sea surface | 88.7°F | 88.9°F | 88.4°F |
Across the three months the air cools steadily while the rain climbs: 86.6°F, then 85.8, then 84.2 by day, against 3.37 inches, 4.43 and 4.39. Wet days go 10.2, 11.8, 11.9. The sea declines to participate, holding 88.7°F, 88.9 and 88.4, a spread of half a degree that nobody has ever felt with their skin.
Shift four weeks earlier and you gain a month drier by 1.06 inches and 1.6 fewer wet days, paying 0.8°F more daytime heat for it and staying inside the same storm window. Shift four weeks later and October hands back 1.6°F of heat while keeping essentially September’s rainfall, with the season still running to November 30. Both neighbors are written up in full at August and October.
Is September a good time to visit Negril?
Yes for swimmers, snorkelers and anyone whose vacation is mostly horizontal in warm water, and yes for travelers who can move their dates on a few days’ notice. No for a wedding party, a milestone anniversary or any trip built on one immovable week, because September 10 is the peak of the Atlantic season and most of the activity falls between mid-August and mid-October.
If the answer is no, the month to aim at is not October, which is wetter by the day count and no further from the storms. Step out of the season entirely: our best-time-to-visit page makes the case for the winter dry months, and the hurricane page shows where the risk drops away. You pay for that safety in company on the beach.
What September alone puts together is 88.9°F water, a beach with space on it, and a room you can still book a month out.
The last word
Settle refundability before you settle on the resort, because in Negril in September that single checkbox outranks the view from the balcony. Then let the rain go. An average September records 0.3 days with an inch or more of water, which works out to roughly one September in three getting a single real soaking, while the other two spread 4.43 inches across showers you can sit out with a coffee. Read our notes after Hurricane Melissa before you pack, and keep the NHC forecast open the week you fly.
Sources & data for this guide
- September normals (85.8°F / 78.7°F, 4.43 in) and wet-day counts · Open-Meteo / ECMWF ERA5, 1991-2020, grid cell 18.2683° N 78.3475° W · model reanalysis, not an airport station record · checked Sep 21, 2026
- August and October normals used in the comparison table · same ERA5 series, 1991-2020 · checked Sep 21, 2026
- Sea surface 88.9°F, mean of daily maxima 2015-2024 · Open-Meteo Marine API · checked Sep 21, 2026
- Daylight, sunrise and sunset for September 15 (11:00 and 23:16 UTC, converted to America/Jamaica) · sunrise-sunset.org · checked Sep 21, 2026
- Atlantic hurricane season dates and the September 10 peak · NOAA National Hurricane Center · checked Sep 21, 2026
- We could not verify admission prices, opening hours, occupancy series or Jamaica’s lodging-tax rate, so we give no figures for them. Booking lead times are marked (est.) where we offer one.
To plan your stay
- Things to Do in Negril: Reef Snorkeling, the West End Cliffs, Mayfield Falls and Free Beach Days
- Where to Stay in Negril: Zones, Evening Noise and the Walk to the Sand
- Montego Bay Airport to Negril: Shuttles, Private Transfers and the Departure-Day Return
- Things to Know Before Going to Negril: Norman Manley Boulevard, the West End Cliffs, Sunset Crowds and the Airport Run