Tampa in September: Weather, Sea Temperature and Hurricane Season

TAMPA · SEPTEMBER · NOAA STATION USW00012842

Whether Tampa will be warm in September is not the question. The NOAA gauge at Tampa International averages a 90.2°F high and a 75.3°F low for the month, and the Gulf off the coast runs 87.2°F. The real decision sits around two other figures: 6.09 inches of rain, and a hurricane season whose statistical peak falls on September 10.

Push the same trip four weeks later and the month changes shape: rain falls from 6.09 inches to 2.34, measurable-rain days from 8.2 to 4.4, and the Gulf cools from 87.2°F to 79.7°F. Those are the trade-offs to weigh, along with a 6% county rental tax that never flexes with the season and a refund clause that will matter more than the nightly rate.

On this page

• Tampa weather in September90.2°F days, 6.09 inches, 8.2 rain days
• Can you swim in September?87.2°F Gulf water, and how it is measured
• Hotel tax and booking termsThe 6% Hillsborough rental tax
• Things to do in SeptemberHillsborough River, Alafia River, Ybor City
• A two-day planTwo days keyed to a 7:14 a.m. sunrise
• September vs August and OctoberThe three months in one table
• Is September a good time to visit Tampa?Who should go, who should move the dates

Every figure here is attributed where it appears, and the neighboring months have pages of their own: Tampa in August and Tampa in October. The undated questions live elsewhere too, in Florida’s month-by-month verdict, getting around and what a Florida trip costs.

Tampa weather in September: average highs, lows and rain days

The 90.2°F high and the 75.3°F low come from NOAA’s 1991-2020 monthly normals for station USW00012842, listed as TAMPA INTL AP. That is one thermometer, not a reanalysis grid cell averaged over a wide box, and it sits at the airport, inland on the bay side rather than on a beach. Every figure here carries that limit: a balcony over the sand and a runway apron do not read the same at the same hour.

Across the month, 8.2 days record at least 0.10 inch, so measurable rain arrives roughly one day in four. Only 1.9 of those days reach a full inch, which is the distance between a wet hour and a canceled afternoon. The normals count days, not hours, so nobody here will tell you the storm shows up at four o’clock: that breakdown is not in the published record.

Day to night, the spread is 14.9°F, and the low turns up shortly before a 7:14 a.m. sunrise rather than at midnight. Nothing in that range calls for a jacket. Pack against the humidity instead: a second shirt for the afternoon, a dry bag for anything with a battery on a paddling day, and shoes you are willing to soak on one of those 1.9 inch-plus days.

September 15 gets 12 hours 21 minutes of daylight, with sunrise at 7:14 a.m. and sunset at 7:35 p.m. on Tampa’s clock (sunrise-sunset.org, converted from UTC). Light that lasts past 7:30 is what makes a late launch or a 5 p.m. walk work here, and it is the first thing the calendar takes back as fall goes on.

Can you swim in Tampa in September? Sea temperature and wind

87.2°F is the September figure, from the Open-Meteo Marine API averaged over 2015-2024. Read the definition before the number: it is the mean of daily maxima, so it describes the water at its warmest point of the day and runs a shade above a true 24-hour average. Tables built on 24-hour means will show Tampa a little cooler for the same month, and neither is wrong.

At that temperature there is no entry shock, no wetsuit question, and no reason to keep children moving to stay warm. What 87.2°F water will not do is cool you down after a 90.2°F afternoon. The nearest thing to refreshing in this month comes early, when the sea has spent the night under a 75.3°F low and the sun has not yet worked on it.

A monthly wind or swell series for Tampa Bay was not readable when we checked, so none is quoted here. The season is on the record, though: NOAA’s National Hurricane Center dates the Atlantic season June 1 to November 30, peaking September 10, with most activity between mid-August and mid-October. Check the Hurricane Center outlook the week you fly, then again on the morning you plan to swim.

How busy is Tampa in September? Crowds, prices and the Hillsborough rental tax

No monthly hotel-rate or occupancy series for Tampa was readable on September 11, 2026, so no ranking of the year’s room rates appears anywhere here. The calendar facts stand on their own: September falls after the summer school block and inside the Atlantic hurricane season, with the statistical peak on the 10th. Demand and risk move together in this window, and the second one is the one you can plan around.

Given that peak date, the clause to shop for is the refund clause rather than the earliest possible booking date. Take the room and the flight on terms you can move, and read the Hurricane Center outlook before the change deadline instead of after it. Seats are rarely the bottleneck: TPA boarded 12,075,591 passengers in calendar year 2024, an FAA large hub, so there are competing schedules to rebook onto if a system settles in the Gulf.

Hillsborough County levies a 6.0% transient rental tax on short stays, filed and paid alongside the 6% state sales tax on the same return, Florida Department of Revenue form DR-15TDT. That is twelve cents on every dollar of room rate. The rate is identical in September and in February. Property charges beyond those two lines were not readable for Tampa, so no resort or parking fee is quoted here.

One place a bigger budget changes this particular month: the car. Bus fares could not be read from the operator (gohart.org returned a 404 on September 11, 2026), and the three river parks worth the trip sit well outside downtown. A rental turns a 90.2°F midday into an air-conditioned drive between two water stops, as the getting-around guide sets out. The second place is the refundable rate, which almost always costs more than the locked one.

Things to do in Tampa in September: Hillsborough River, Alafia River and Ybor City

Water at 87.2°F is the month’s argument. October takes 7.5°F off that figure, so a trip built around swimming and paddling belongs to September rather than to the month after it. Daylight helps too: with sunset at 7:35 p.m. on the 15th, a launch at five still gets you off the river in good light, which the shorter evenings of late fall stop allowing.

The state counts what it owns. Hillsborough River State Park has 350 parking spaces, 3 canoe, kayak and tube launches, and 5 miles of hiking trail. Little Manatee River State Park has 109 spaces, 1 launch and 8.4 miles of trail. Alafia River State Park is the small one, 50 spaces, 1 launch, 1.2 miles. In town, Ybor City Museum State Park counts 311 feet of boardwalk. Admission prices and opening hours are not in that inventory and the park pages did not render for us, so none is quoted.

An hour or so north, the spring parks work on a different thermostat: Weeki Wachee Springs State Park (255 parking spaces, one designated swimming area), Ellie Schiller Homosassa Springs Wildlife State Park (197 spaces) and Crystal River Preserve State Park (77). Their water holds its temperature all year. The air above it does not, running 90.2°F in September against 85.6°F in October, so the same spring feels colder in September by exactly the 4.6°F the air has lost.

No free-admission day for Tampa in September turned up in the sources we could read, and none is invented here. What comes free with the date is light until 7:35 p.m. on the 15th and Gulf water at 87.2°F from any public access. The year-round shortlist, priced where prices exist, sits in things to do in Florida.

Tampa in September: a two-day itinerary

Day one keys off the 7:14 a.m. sunrise. On the road by seven, into Hillsborough River State Park early enough to take one of the 350 spaces and one of the three launches while the air is still near the 75.3°F low. Paddle first, walk a stretch of the 5 miles of trail before eleven, and be indoors for the middle of the day. Ybor City from five, with sunset at 7:35 p.m. and an evening warm enough for shirtsleeves.

Day two opens in the water, when the Gulf has not yet reached its daily maximum and the contrast with the night low is at its best. Afterward, Little Manatee River State Park for the 8.4 miles of trail, or Alafia River State Park if a 1.2-mile walk to a single launch suits the group better. If the sky turns, the counts help: 8.2 days at 0.10 inch against only 1.9 at a full inch, so the usual fallback is a two-hour indoor detour, not a scrapped day.

Tampa in September vs August and October

August runs 1.0°F hotter by day and 1.5°F hotter by night, and it delivers 9.03 inches across 11.2 measurable days against September’s 6.09 across 8.2. October is the larger step in every column: 85.6°F days, 69.2°F nights, 2.34 inches, 4.4 rain days, and a Gulf down to 79.7°F. Air normals for all three months come from the same NOAA station; the three sea figures come from the Open-Meteo Marine API over 2015-2024.

Shift the trip four weeks later and you collect 3.8 dry days back, 3.75 inches less rain, nights 6.1°F cooler, and a date past the September 10 peak, though still inside a season that closes November 30. You give up 7.5°F of sea temperature. Going the other way costs you rain: August’s water is warmer at 89.2°F, and it comes with three more measurable-rain days than September.

Is September a good time to visit Tampa?

Yes for swimmers and paddlers who can travel on terms they are able to move. Water at 87.2°F, afternoons at 90.2°F and measurable rain on 8.2 days out of thirty are workable figures for a trip built around water, shade and early starts. No if your dates are locked, if the plan depends on midday hours outdoors, or if a canceled week would take the whole vacation budget with it.

When the answer is no, October is where to move, and it wins on paper by a distance: 85.6°F days, 2.34 inches of rain, 4.4 measurable-rain days, and a calendar past the statistical peak. Its Gulf at 79.7°F still swims for most people. August moves the wrong way on every line except the sea.

Among these three months, September is the only one pairing Gulf water above 87°F with a rain column three days shorter than August’s.

The last word

Decide on one line: if the water is the reason for the trip, September holds it at 87.2°F, and October does not. One fact that changes a September cruise booking in particular: Port Tampa Bay is a homeport rather than a port of call, with eight vessels from five cruise lines. You fly in and sail out of the same city, so the flight and the sailing are a single chain in the month the Hurricane Center marks as its peak. Book both links of it refundable.

Sources & data for this guide

• September normals (90.2°F / 75.3°F / 6.09 in) · NOAA NCEI monthly normals 1991-2020, station USW00012842, Tampa International Airport · checked Sep 12, 2026
• Rain-day counts (8.2 days at 0.10 in, 1.9 days at 1.00 in) · same NOAA normals · checked Sep 12, 2026
• Station identity and siting, “TAMPA INTL AP” · NCEI Search service · checked Sep 12, 2026
• Sea surface 87.2°F, mean of daily maxima 2015-2024 · Open-Meteo Marine API · checked Sep 12, 2026
• Daylight and sun times for September 15 · sunrise-sunset.org, UTC converted to America/New_York · checked Sep 12, 2026
• Hurricane season dates and the September 10 peak · NOAA National Hurricane Center · checked Sep 12, 2026
• August and October normals and sea temperatures · same NOAA station and same marine API · checked Sep 12, 2026
• Transient rental tax 6.0% filed with 6% state sales tax · Florida Department of Revenue, form DR-15TDT · checked Sep 12, 2026
• Parking spaces, launches, trail miles and boardwalk feet · Florida Department of Environmental Protection, Recreational Facilities Inventory, 2024 annual report · checked Sep 12, 2026
• TPA boardings, 12,075,591 in CY2024 · Federal Aviation Administration passenger boardings · checked Sep 12, 2026
• Homeport status, eight vessels from five lines · Port Tampa Bay · checked Sep 12, 2026
• Editorial admission: no bus or train fare, no park admission price and no opening hour appear here because the operators’ pages could not be read on Sept 11, 2026 (gohart.org returned 404, tampaairport.com returned 403). No amount was estimated in their place.