WEEKI WACHEE SPRINGS · SEPTEMBER · THE MONTH IN FIGURES
September still runs hot here. NOAA’s 1991-2020 normals put the average afternoon at 89.5°F, the average night at 70.1°F, and the month’s rain at 5.79 inches spread over about eight wet days. The spring water is a separate matter: it has no season at all, and that is the reason anyone drives out in a month this warm.
So the date moves the air, not the water. September comes off August’s peak by 1.4°F and drops 2.33 inches of rain from the August total, while the swim area does exactly what it did in June. The one thing the calendar cannot loosen is the lot: Florida counts 255 parking spaces at the park, and a full lot closes the gate.
THE MONTH AT A GLANCE · SEPTEMBER
September buys you a drier month than August without touching the water temperature, provided you reach the 255-space lot early enough to park.
NOAA 1991-2020 NORMALS · BROOKSVILLE AIRPORT, 44 KM INLAND · 255 PARKING SPACES
Go for: water the calendar never touches, a canoe, kayak and tube launch on the Weeki Wachee River, and four fewer rain days than August.
Think twice before: driving out late on a clear Saturday. The state counts 255 spaces, and when they fill the gate closes.
Air normals: NOAA NCEI 1991-2020, Brooksville Hernando Co AP · Facilities: Florida DEP 2024 inventory · full sources at the end
On this page
- September weather at the spring89.5°F afternoons and 8.1 rain days
- How hot the afternoons getA 19.4°F gap between night and afternoon
- Crowds, parking and what a day costsThe 255-space lot, and the prices we could not verify
- Things to do in SeptemberOne swim area, one paddle launch
- A two-day plan for the springTwo days built on 12h 21m of light
- September against August and OctoberThree months of NOAA normals side by side
- Is September worth it, or should I wait?Who goes now and who waits for October
August sits in the same NOAA series and gets its own read in Weeki Wachee Springs in August. Everything that is not dated by the month belongs elsewhere: the drive and the rental car in getting around Florida, the budget in what a Florida trip costs, and the statewide dry-season case in the best time to visit Florida.
Weeki Wachee Springs weather in September: average highs, lows and rain days
| Measure | September normal |
|---|---|
| Average high | 89.5°F |
| Average low | 70.1°F |
| Precipitation | 5.79 in |
| Days with 0.10 in or more | 8.1 |
| Days with 1 in or more | 1.8 |
| Daylight, September 15 | 12h 21m · 7:14 am to 7:35 pm |
Every figure here comes from a real thermometer, not a grid cell: NOAA’s National Centers for Environmental Information, 1991-2020 monthly normals, station USW00012818 at Brooksville Hernando County Airport. That station sits roughly 44 km inland from the spring, so treat 89.5°F and 70.1°F as the air over this corner of Hernando County rather than a reading taken at the water’s edge. And they describe air only. The spring itself holds its temperature through the year, which is why a 90-degree month and a 60-degree one both end in the same swim.
Measurable rain reaches the gauge on 8.1 September days, roughly one day in four, and 1.8 of those days deliver an inch or more. In practice that means most days keep dry hours, and about two of them get a proper drenching. Florida’s wet-season rain builds with the heat and arrives in the second half of the afternoon far more often than it settles in for a gray morning, so a soaked 4 pm rarely says anything about the following 8 am.
Between the 70.1°F night and the 89.5°F afternoon sits 19.4°F of daily swing, and almost all of it lands before noon. Pack for the top of that range and one extra item for the bottom of it: a dry shirt, because a wet towel in a damp 5.79-inch month dries slowly, and something with sleeves for anyone sitting still in shade after a long swim. Nothing here calls for a jacket.
On September 15 the sun rises at 7:14 am and sets at 7:35 pm local time, giving 12 hours 21 minutes of daylight. Usable light runs out shortly after that sunset. A swim that starts at 5 pm still has two clear hours, while anything that starts after 6:30 pm is a dusk swim in a park whose closing time we could not verify.
How warm is Weeki Wachee Springs in September?
The month’s two anchor numbers are 89.5°F and 70.1°F, 19.4°F apart. Compared with August’s 90.9°F and 72.1°F, September gives back 1.4°F by day and 2.0°F by night, which is small on paper and noticeable at 8 am. October is the real drop, and it waits in the comparison further down.
Dress for a morning that starts mild and an afternoon that does not. Swimsuit under whatever you drive in, a hat for the walk from the lot, and shoes you can wear wet. By 2 pm the shade matters more than the shirt. Anyone planning to stay out of the water in mid-afternoon should plan for sitting, not walking.
Freezing nights do not enter the picture at a normal low of 70.1°F, and we found no freeze-day count for September in the NOAA normals we read. Nor could we verify a published water temperature for the spring, so we quote no number for it. What the state and Florida law both establish is that the water runs at its own steady rate regardless of the month, and the air does all the seasonal work.
How busy is Weeki Wachee Springs in September? Crowds, prices and the demand peak
We found no occupancy series and no monthly room-rate figures for this corner of Florida, so we crown no month cheap and none expensive. The number the state does publish is a hard one: 255 parking spaces at Weeki Wachee Springs State Park. That cap does not change with the calendar, and it is what decides a clear Saturday. When the lot fills, the gate closes, whatever the date on your phone says.
That turns a booking question into an arrival question. We could not read the park’s own reservation page, since floridastateparks.org answers 403 to automated reads, so we cannot tell you whether timed tickets exist for September. Plan on the lot instead: aim for the first hours after opening rather than the drive that gets you there around lunch, and have a second stop in mind for the day the gate is already shut.
On the lodging side, we could not verify Hernando County’s tourist development tax rate, so we give no percentage and no total. Whatever it is, it lands on the room rate at checkout rather than on the park gate. Our Florida trip-cost guide carries the statewide picture on taxes, resort fees and parking, and those three lines move a week’s budget more than any September weather does.
If extra money buys one thing in September, it buys proximity. A bed close enough that you reach the gate early, rather than a cheaper room an hour off that costs you the coolest three hours of a 89.5°F day, is the single upgrade the month rewards. Where to stay in Florida sets out the regional trade-off; the local version is simply distance to the lot.
Things to do in Weeki Wachee Springs in September
What September adds over August is dry hours. Rain falls on 8.1 days at 0.10 inch or more against August’s 12.3, and the monthly total drops from 8.12 inches to 5.79, close to a third less water from the sky. That is four extra days in a month when a picnic, a paddle or a walk to the launch is not interrupted. The water you came for is identical in both months.
The Florida Department of Environmental Protection’s 2024 facilities inventory counts what the park holds: one designated swimming area, one canoe, kayak and tube launch, and the 255 spaces that feed both. One launch means a single put-in point for every hull and every tube on the river, so timing it early matters more than it would at a park with three.
September changes the contrast, not the swim. With the air near its annual ceiling, the step from 89.5°F into constant spring water is about as sharp as it gets all year, and the walk back to the car is the part people underestimate. By October that same step is milder on both ends. Manatee numbers are a winter question, and we could not verify a September count; our manatee guide handles where and when they gather.
On free entry, we could not confirm any fee-free day at this park in September, and we will not guess at one. What genuinely costs nothing is the daylight: 12 hours 21 minutes of it on the 15th, and the shaded riverbank around the launch. For everything beyond the park boundary, things to do in Florida is the wider list.
Weeki Wachee Springs in September: a two-day itinerary
Day one runs against the heat. Sunrise at 7:14 am, breakfast before it, and the drive timed so you are queuing for one of the 255 spaces early rather than circling at 11. Swim first, paddle second, since the single launch is easier at 9 than at noon. Take the middle of the day sitting in shade or indoors, when the air is working toward 89.5°F and the afternoon storm risk climbs. Return to the water around 4 pm, with three hours of light left.
Day two repeats the early start and adds distance on the river, keeping the paddle in the first half of the day. If the sky turns, remember the shape of September rain: 1.8 days in the month bring an inch or more, and those are the days to shift indoors by early afternoon and come back at 5 pm rather than to write off the whole date. Sunset at 7:35 pm leaves room for a late swim after a wet hour.
Weeki Wachee Springs in September vs August and October
| Normal | August | September | October |
|---|---|---|---|
| Average high | 90.9°F | 89.5°F | 84.5°F |
| Average low | 72.1°F | 70.1°F | 61.7°F |
| Precipitation | 8.12 in | 5.79 in | 2.79 in |
| Days with 0.10 in or more | 12.3 | 8.1 | 4.0 |
Across the three months the air falls steadily and the rain falls faster. September sheds 1.4°F of afternoon heat and 2.33 inches of rain from August. October then takes another 5.0°F off the afternoon, 8.4°F off the night, and cuts rain to 2.79 inches over 4.0 wet days. Through all of it the spring holds its own temperature, so the only variable in a swim is what the air does to you before and after it.
Shift four weeks later and you gain four drier days and a genuinely comfortable afternoon. You lose the warm exit: a 61.7°F October night means an early swim ends colder than it does now, and a towel matters. Shift four weeks earlier and August hands back 12.3 rain days for the same water. September sits between the two, closer to August in heat and closer to October in rain.
Is September a good time to visit Weeki Wachee Springs?
Yes, if your day is built around being in the water and you can be at the gate early. The heat that makes 89.5°F unpleasant on a boardwalk is exactly what makes a spring swim feel extraordinary, and the month gives four more dry days than August. No, if you want long dry hours out of the water, or if your schedule only allows a midday arrival at a park with 255 spaces.
If that is your situation, October is the month to move to. Rain drops to 2.79 inches across 4.0 wet days, afternoons settle at 84.5°F, and walking, picnicking and photographing all become comfortable. The cost is a 61.7°F night and a cooler climb out of the water. Families who want both the swim and the dry afternoon usually find that trade worth taking.
What September gives that no other month can: the widest gap of the year between the air you walk through and the water you step into, with four more usable days than August offered.
The last word
Decide your arrival time before you decide anything else, then let the swim set the rest. One detail worth carrying: Florida law gives springs like this one a category of their own, Outstanding Florida Springs under Florida Statutes 373.802(5), covering every historic first-magnitude spring identified by the Florida Geological Survey plus six more named in the statute itself. That protection is the reason the water you swim in during a 5.79-inch September looks the way it does.
Sources & data for this guide
- September air normals, 89.5°F / 70.1°F / 5.79 in, and rain-day counts · NOAA NCEI monthly normals 1991-2020, station USW00012818, Brooksville Hernando Co AP · checked Sep 24, 2026
- August and October normals used in the comparison · same NOAA NCEI 1991-2020 series and station · checked Sep 24, 2026
- Daylight, sunrise 7:14 am and sunset 7:35 pm on September 15, converted from UTC · sunrise-sunset.org · checked Sep 24, 2026
- 255 parking spaces, 1 designated swimming area, 1 canoe, kayak and tube launch · Florida Department of Environmental Protection, Recreational Facilities Inventory 2024 · checked Sep 24, 2026
- Outstanding Florida Springs definition · Florida Statutes 373.802(5), leg.state.fl.us · checked Sep 24, 2026
- Editorial note: floridastateparks.org returned 403 to our reads and the FWC manatee pages render client-side, so we carry no entrance fee, no opening hour and no manatee count · checked Sep 24, 2026
To plan your stay
- Best Time to Visit Weeki Wachee Springs: Month-by-Month Highs, Lows, Rain Days and the Swim Season
- Weeki Wachee Springs in August: Heat, Rain Days and the 255-Space Parking Lot
- Weeki Wachee Springs in October: Weather, Crowds, Parking and a Two-Day Plan
- Weeki Wachee Springs in July: Heat, Rain Days and the 255-Space Lot