FLORIDA · MIAMI · SEPTEMBER
Miami in September is hot, wet and warm in the water. The airport gauge averages an 89.0°F high, the sea off the city averages 87.8°F at its daily peak, and the Atlantic hurricane season reaches its calendar peak on September 10. Lummus Park, the free beach in front of Ocean Drive, keeps its lifeguards on duty through all of it, and a morning swim there is the best hour the month has to offer.
Miami International sits about 12 miles from South Beach, a 20 to 45 minute drive depending on traffic. Without a car, the MIA Mover takes you to the Miami Intermodal Center, where the Metrorail Orange Line leaves for Downtown about every 15 minutes, from roughly 5 a.m. to midnight, for $2.25 a ride. Two or three nights (est.) fit the two-day plan below with a travel day on either side.
MIAMI IN SEPTEMBER · AT A GLANCE
Go to Miami in September for warm-water swimming in the low-rate stretch of the year, book every night and flight on refundable terms, and keep outdoor plans for the morning, since the Atlantic hurricane season peaks on September 10.
HURRICANE SEASON PEAK · WET SEASON · REFUNDABLE BOOKINGS
Go for: sea swims in 87.8°F water, free evenings at the Perez Art Museum Miami, Vizcaya’s gardens at the 9:30 a.m. opening, and hotel rates in the August to October low stretch.
Think twice before: locking in non-refundable dates. September sits inside NOAA’s mid-August to mid-October window of peak storm activity, and measurable rain falls on 13.1 days of the month.
Climate: NOAA NCEI, Miami International station · Sea: Open-Meteo Marine · Storms: NOAA NHC · full sources at the end
On this page
- Miami weather in September89.0°F highs and 13.1 rain days
- Sea temperature in Miami in September87.8°F at the daily peak
- Hotel prices and taxes in SeptemberLow-season rates and 12% in room taxes
- Things to do in Miami in SeptemberVizcaya, PAMM, Lummus Park and Crandon Park
- A two-day Miami itinerary for SeptemberTwo days set between a 7:05 a.m. sunrise and a 7:25 p.m. sunset
- Miami in September vs August and OctoberHighs of 90.7°F, 89.0°F and 85.9°F
- Is September a good time to visit Miami?Yes for swimmers with flexible dates
Miami here means the whole trip: Wynwood, Little Havana and Coconut Grove on the mainland, inside the City of Miami, and South Beach on the island, part of the separate City of Miami Beach across Biscayne Bay. Coral Gables is a third, independent municipality, incorporated on April 29, 1925. Choosing a neighborhood is covered in our Florida where-to-stay guide, buses and rail in getting around Florida, and the twelve-month picture in the best time to visit Florida.
Miami weather in September: average highs, lows and rain days
| September in Miami | Normal |
|---|---|
| Average high | 89.0°F |
| Average low | 76.9°F |
| Precipitation | 10.22 in |
| Days with 0.10 in or more | 13.1 |
| Days with 1 in or more | 3.3 |
| Daylight on September 15 | 12 h 20 min |
| Sunrise / sunset, September 15 | 7:05 a.m. / 7:25 p.m. EDT |
NOAA’s National Centers for Environmental Information give Miami an average September high of 89.0°F, an average low of 76.9°F and 10.22 inches of rain, from the 1991 to 2020 normals of station USW00012839 at Miami International Airport. Every figure here is a station normal from a real thermometer on the mainland, rather than an ERA5 reanalysis grid cell, and the two methods can disagree by several degrees. At the same gauge, June is the wettest month of the year at 10.51 inches, only 0.29 inch above September.
Measurable rain (0.10 inch or more) falls on 13.1 days of an average September, roughly four days in nine. On 3.3 of those days the gauge collects an inch or more, about one day in nine. Our seasonal sources describe summer rain in South Florida as afternoon thunderstorms, so put the beach and the walking in the morning and keep a museum or a long lunch for mid-afternoon.
Only 12.1°F separates the average high from the average low, and summer humidity runs between 85 and 90 percent in the seasonal sources. Nights need no jacket. Pack light, breathable clothes you can change at midday, a compact umbrella or rain shell for the downpours, strong sunscreen and one thin layer for air-conditioned museums and restaurants.
September 15 brings about 12 hours 20 minutes of daylight. Sunrise-sunset.org puts sunrise at 11:05 and sunset at 23:25 UTC, or 7:05 a.m. and 7:25 p.m. Eastern Daylight Time. A swim before 9 a.m. gets nearly two hours of light at the cooler end of the day, and there is still enough daylight after the storm hours for a late beach session before 7:25 p.m.
Can you swim in Miami in September? Sea temperature
Open-Meteo’s Marine API puts the sea surface off Miami at 87.8°F in September, averaged over 2015 to 2024. That figure is the mean of each day’s maximum, so it runs a shade warmer than a 24-hour average would. Other tables use other methods: for January, our sources already split between about 72°F and 76°F. Read any single sea temperature as a value with its method attached.
In the water, 87.8°F sits just 1.2°F below the 89.0°F average high in the air. Wading in brings no cold shock, and a long swim does little to cool you down, so take a shaded break every hour. Lummus Park, between 5th and 15th Streets on Ocean Drive, is free, open 24 hours and staffed by lifeguards, with public restrooms and picnic tables behind the sand.
We could not verify a September wind or swell series for Miami, so we give no wave height. The National Hurricane Center does publish the calendar: the Atlantic season runs June 1 to November 30, peaks on September 10 and concentrates most activity between mid-August and mid-October. Check the NHC outlook the day before any beach or boat plan, swim in front of a staffed lifeguard stand, and read our Florida safety guide for storm preparation.
How busy is Miami in September? Crowds and prices
Market data relayed by travel guides puts Miami hotel rates at their lowest from August to October and at their highest from February to April. That is a market trend rather than an official statistic. We found no monthly occupancy series, so we put no percentage on how quiet the city gets. September falls in Florida’s May to October wet season, while South Florida’s warm, dry stretch runs December to April.
We found no booking-lead data for September, so we name no number of weeks. With the September 10 peak inside the month, book a refundable room and a changeable fare, so you can move the trip if a storm tracks toward South Florida. Fort Lauderdale-Hollywood, about 25 miles from South Beach and 35 to 50 minutes on I-95, is the alternative airport to price. Our Florida flights guide compares the two.
Miami-Dade County levies a 6.0% transient rental tax on stays, filed and paid together with Florida’s 6% state sales tax, according to the Florida Department of Revenue’s form DR-15TDT. The two add up to 12% on the room rate. We could not verify any extra city-level charge on Miami Beach stays, so we give no combined figure beyond those two taxes. Our Florida trip-cost guide prices the rest of the budget.
Miami Beach hotels commonly add a nightly resort fee on top of the room rate, and published amounts diverge sharply: about $25 on average in one comparison, $35 to $95 depending on the property in others. Ask for the all-in nightly total before comparing two hotels. If you spend extra anywhere in September, spend it on the flexible version of the rate. It lets you shift the stay by a week, while an ocean-view upgrade changes nothing about the forecast.
Things to do in Miami in September
September gives Miami its warmest sea of the three late-summer months after August, and a sea only 1.2°F cooler than the air. Long swims at 7 or 8 a.m., a second session once the afternoon storms pass, and museum evenings when the rain comes early: the month rewards a day built around the water. Our Florida things-to-do guide covers the year-round list.
Vizcaya Museum and Gardens, in north Coconut Grove on Biscayne Bay, opens Wednesday to Monday at 9:30 a.m., takes last admission at 4:30 p.m. and closes on Tuesdays. Adults pay $20 during restoration work, down from $25, children 6 to 12 pay $5 and under-6s enter free, and the Vizcaya Metrorail station is a few minutes’ walk away. South Pointe Park, at the tip of South Beach, is free to enter, with a lot from $2 an hour and a $20 flat rate on weekends and holidays. Crandon Park on Key Biscayne charges $7 to park on weekdays and $10 at weekends.
The sea is where September differs most. Our winter sources put the water off Miami at about 72°F, measured by a different method than the 87.8°F daily-maxima figure, so Crandon Park and South Pointe offer swimming that feels nothing like a January dip. The gardens at Vizcaya are outdoors, which makes the 9:30 a.m. opening the time to walk them, before the heat and the afternoon storms.
The Perez Art Museum Miami is free every Thursday from 5 to 9 p.m., nearly two and a half hours of it before the 7:25 p.m. sunset, and free all day on the second Saturday of the month (September 12 in 2026), with art-making from 11 a.m. to 3 p.m. Lummus Park costs nothing at any hour. The Metromover is free across Downtown and Brickell, every 90 seconds at rush hour and every three minutes off-peak, though its published hours diverge (5:30 a.m. to 10 p.m. per Miami-Dade, 5 a.m. to midnight elsewhere). On Miami Beach, the free trolley runs five routes from 8 a.m. to 11 p.m., about every 20 minutes.
Miami in September: a two-day itinerary
Day one, Miami Beach. Be on the sand at Lummus Park soon after the 7:05 a.m. sunrise and swim in front of a lifeguard stand until about 9:30. Board the free trolley (first run at 8 a.m.) south to South Pointe Park for the late morning. From noon to about 3 p.m., the likeliest storm and heat hours, go indoors for a long lunch. Return to the beach around 4:30 and stay until the 7:25 p.m. sunset, then ride the Collins Express trolley along Collins Avenue to dinner.
Day two, the mainland. Take route 120, the Beach MAX, over the MacArthur Causeway to Downtown for $2.25, then Metrorail to the Vizcaya station for the 9:30 a.m. opening (never on a Tuesday). Afternoon belongs to Downtown and Brickell on the free Metromover, and a Thursday puts PAMM’s free 5 to 9 p.m. hours in reach. Fare capping stops at $5.65 a day. If the NHC flags a system or the rain sets in, Vizcaya’s house and PAMM keep you indoors, and a clear weekday swaps in Crandon Park for $7 of parking. Longer loops start in our 7-day Florida itinerary.
Miami in September vs August and October
| NOAA normals, MIA station | August | September | October |
|---|---|---|---|
| Average high | 90.7°F | 89.0°F | 85.9°F |
| Average low | 77.7°F | 76.9°F | 74.2°F |
| Precipitation | 9.58 in | 10.22 in | 7.65 in |
| Days with 0.10 in or more | 13.3 | 13.1 | 9.0 |
| Sea surface (daily maxima) | 88.3°F | 87.8°F | 84.5°F |
Against August, September runs 1.7°F cooler at the high and 0.8°F cooler at the low, gets 0.64 inch more rain on 0.2 fewer rain days, and loses 0.5°F of sea. October drops the high to 85.9°F, 3.1°F below September, and the low to 74.2°F. It also cuts the rain to 7.65 inches over 9.0 days, 4.1 fewer than September, while the sea holds at 84.5°F. The same NOAA station and 1991 to 2020 period sit behind all three months.
Moving four weeks earlier into Miami in August buys half a degree of sea and the same low-rate window, at the cost of the month’s hottest air. Moving four weeks later into Miami in October buys drier days, cooler nights and an exit from the peak storm window by mid-month, in exchange for sea that is 3.3°F cooler. Both neighbors sit inside the June 1 to November 30 hurricane season.
Is September a good time to visit Miami?
Yes, if you want to swim, can shift dates and book refundable, and plan your outdoor hours before noon. No, if your dates are fixed around a wedding or a school calendar, if a hike or a day in the Everglades ($35 per vehicle for seven days, entrances an hour or more apart) sits at the center of the trip, or if 85 to 90 percent humidity ruins your day.
If the answer is no, pick October for the same city with 4.1 fewer rain days and a high of 85.9°F, still in the August to October low-rate stretch. For dry weather, South Florida’s warm, dry season runs December to April, with highs roughly between 65°F and 80°F. Hotel rates reach their peak from February to April, according to the same market data.
Among August, September and October, September brings the sea closest to the air, 87.8°F water against an 89.0°F average high.
The last word
Miami in September comes down to one decision: the flexible fare and the refundable room, booked with the NHC calendar in mind. Everything else is warm water and a morning start. Landing at MIA, skip the taxi line and take route 150, the Miami Beach Airport Express. It runs from the airport Metrorail station across the Julia Tuttle Causeway to Mid Beach about every 30 minutes, from roughly 5 a.m. to midnight, for $2.25 with a luggage rack on board.
Sources & data for this guide
- September, August and October normals (highs, lows, precipitation, rain days), 1991 to 2020 · NOAA NCEI, station USW00012839, Miami International Airport · checked Sep 24, 2026
- June and January precipitation (10.51 in, 1.83 in) · NOAA NCEI 1991 to 2020, via seasonal climate sources · checked Sep 24, 2026
- Sea surface temperature, mean of daily maxima, 2015 to 2024 · Open-Meteo Marine API · checked Sep 24, 2026 · winter values from seatemperature.org and Current Results diverge (about 72°F to 76°F for January), and we did not settle the gap
- Daylight, sunrise and sunset on September 15 · sunrise-sunset.org, converted from UTC to Eastern Daylight Time · checked Sep 24, 2026
- Hurricane season dates and September 10 peak · NOAA National Hurricane Center · checked Sep 24, 2026
- Miami-Dade 6.0% transient rental tax and 6% state sales tax · Florida Department of Revenue, form DR-15TDT · checked Sep 24, 2026 · we could not verify any Miami Beach city-level charge
- Hotel rate pattern (lowest August to October, highest February to April) · market data relayed by travel guides · checked Sep 24, 2026 · a trend, not an official statistic
- Resort fees · fee comparison sites and local guides · checked Sep 24, 2026 · published amounts diverge strongly, so we give a range only
- Vizcaya hours, admission and location · vizcaya.org · checked Sep 24, 2026
- PAMM free hours · pamm.org · checked Sep 24, 2026
- Lummus Park, South Pointe Park and free trolley · City of Miami Beach · Crandon Park parking · Miami-Dade Parks · checked Sep 24, 2026 · parking rates change
- Metrorail, Metromover, routes 120 and 150, fares and fare capping · Miami-Dade Transit and Miami International Airport · checked Sep 24, 2026 · Metromover hours diverge between sources, confirm on arrival
- Airport distances and drive times · airport transport sources · checked Sep 24, 2026 · indicative, not official schedules
- Nights (two or three) are our editorial estimate. We found no wind, swell or booking-lead data for September and give none.