FLORIDA · GINNIE SPRINGS · SEPTEMBER
The spring reads 72.7°F. The air above it, in September, normals at 88.1°F by afternoon and 69.4°F before dawn. That 15.4-degree gap is the entire case for visiting this month: you step out of Florida heat into water that has no opinion about the calendar, and you step back out into an afternoon that dries you in minutes.
What September takes back is 5.05 inches of rain, spread over 6.9 days that record at least a tenth of an inch. Daylight has shortened to 12 hours 22 minutes by the 15th. If you want the state-wide view of the seasons, our best-time page handles the twelve months. This one deals with the four weeks you are actually looking at.
THE MONTH AT A GLANCE · SEPTEMBER
September gives you a 72.7°F spring under 88.1°F afternoons, the last of the three warm months where that gap reads as relief rather than a plunge, paid for with 5.05 inches of rain.
NOAA 1991-2020 NORMALS · 88.1°F HIGH · 69.4°F LOW · 6.9 WET DAYS · SPRING AT 72.7°F
Go for: swimming and diving while the air is still hot enough to make 72.7°F water the coolest room in north Florida, with light holding until 7:36 p.m.
Think twice before: booking anything non-refundable. September normals carry 5.05 inches of rain and 1.4 days of an inch or more, and we could not verify the spring’s fee or its opening hours.
Air: NOAA NCEI 1991-2020, Gainesville Regional Airport · Water: USGS gauge 02322400 · full sources at the end
On this page
- Ginnie Springs weather in September88.1°F high, 69.4°F low, 6.9 wet days
- How cold is the spring water?72.7°F on the USGS gauge
- Crowds and prices in SeptemberNo fee, tax rate or occupancy series verified
- Things to do at Ginnie Springs in SeptemberSwimming, drifting and the dive water
- A two-day plan around the heatSunrise at 7:14, last light at 7:36
- September vs August and OctoberHow the three months compare, in degrees and inches
- Is September a good time to go?Yes for swimmers, no for dry-afternoon planners
Every figure here comes from two different instruments. The air normals below are NOAA NCEI 1991-2020 monthly normals from station USW00012816 at Gainesville Regional Airport, roughly 48 miles from the spring, so they describe the region’s air rather than the microclimate over the water. The water figure comes from a U.S. Geological Survey gauge sitting in the spring itself. The air changes with the month. The spring barely does.
Ginnie Springs weather in September: average highs, lows and rain days
| September normal | Value |
|---|---|
| Average high | 88.1°F |
| Average low | 69.4°F |
| Precipitation | 5.05 in |
| Days with 0.10 in or more | 6.9 |
| Days with 1.00 in or more | 1.4 |
| Daylight, Sept 15 | 12h 22m |
| Sunrise / sunset, Sept 15 | 7:14 a.m. / 7:36 p.m. |
| Spring water, single reading | 72.7°F (22.6°C) |
NOAA’s National Centers for Environmental Information publish the 1991-2020 normals used throughout: an 88.1°F average high, a 69.4°F average low and 5.05 inches of precipitation for the month. Station USW00012816 sits at Gainesville Regional Airport, about 48 miles away, which matters on a day of scattered storms: the airport can log a tenth of an inch while the parking lot at the spring stays dry, and the reverse happens just as often.
Of those 5.05 inches, 6.9 days record at least a tenth, roughly one day in four, and 1.4 days record a full inch or more. Divide the total by the wet days and an average soaking runs about three quarters of an inch. In practice that means one or two afternoons of real rain in a week’s stay, and several more where the sky darkens, empties for twenty minutes and moves on while you are already in the water.
Between the 69.4°F low and the 88.1°F high sits 18.7 degrees of daily swing, most of it arriving between nine and two. Pack for both ends: a long-sleeve layer for a 7 a.m. arrival, a hat and real sunscreen for the middle of the day, and a second towel, because the first one will not dry in that humidity. Anything electronic goes in a dry bag rather than a pocket.
On September 15 the sun clears the trees at 7:14 a.m. and sets at 7:36 p.m., Eastern Daylight Time, for 12 hours 22 minutes of light. Usable light on the water starts later than sunrise under a canopy and ends earlier, so treat 8 a.m. to 7 p.m. as the working day. That still leaves room for a swim, a long lunch in the shade and a second swim before the drive out.
How warm is Ginnie Springs in September?
Two temperatures run side by side all month. The air averages 88.1°F at its afternoon peak and 69.4°F at its overnight floor. The water, on the USGS gauge at station 02322400, read 72.7°F (22.6°C) on September 11, 2026. That is one instantaneous reading rather than a monthly mean of daily maxima, and it is the honest form of the number: a spring of this kind holds close to the same reading every day of the year, while the air above it moves 18.7 degrees before lunch.
At 7 a.m., with the air near 69°F, water at 72.7°F feels warmer than the morning and you will get in without hesitating. By two o’clock the ratio flips and the same water takes your breath for the first ten seconds. Dress accordingly: a rash guard or a thin wetsuit top for a long morning float, nothing at all by mid-afternoon, and dry clothes in the car for the ride home once the sun drops.
Freezing nights do not belong to this month. We read no freeze-day count in the NOAA normals we consulted, so we quote no figure, but the average low of 69.4°F sits 37 degrees above freezing and the coldest thing you will touch in September is the spring itself.
How busy is Ginnie Springs in September? Crowds, prices and the demand peak
September falls after Labor Day, with Florida’s school year back under way, and that is a calendar fact rather than a price signal. We found no occupancy series and no monthly room-rate series for this corner of north Florida, so we crown no month cheap and no month expensive. What we can measure about the month sits in the weather: 6.9 wet days, an 88.1°F normal high, and water that does not care either way.
Weekends move the traffic at any Florida spring, and the useful precaution costs nothing: confirm the gate before you drive. Our sources carry no entrance fee and no opening hour for Ginnie Springs, because floridastateparks.org returned an error to our automated reads on September 11, 2026, and a price found at another park does not transfer. Call ahead, and plan the drive with our getting-around guide if you are coming from a coast.
We could not verify the county lodging-tax rate, so no percentage appears anywhere in the budget below. For the shape of a Florida week, with rental cars, tolls and the resort-fee layer, our trip-cost guide does that arithmetic at state level.
One kind of spending genuinely changes September, and it is proximity. Sleeping within half an hour of the spring buys you the 7:14 a.m. start, when the air is at 69.4°F and the lot is empty, instead of arriving at noon into the 88.1°F part of the day. Where to stay in Florida sorts the regions, and for this trip the only useful criterion is drive time.
Things to do in Ginnie Springs in September
September does one thing better than the months on either side of it: it makes the water feel like a reward. With the air at 88.1°F and the spring at 72.7°F, the gap runs 15.4 degrees. In October that gap shrinks to 9.4 degrees, and the same swim becomes a decision rather than an obvious idea. Of the three months, September is the last one carrying a double-digit spread.
The spring itself is the attraction, and the USGS keeps a gauge in it, station 02322400, reading 72.7°F on September 11, 2026. Florida’s Department of Environmental Protection names Ginnie Springs, alongside Peacock Springs, among the most popular and interesting springs diving destinations in the state, which is the clearest signal we have about what people come here to do. We hold no verified entrance fee, no opening hour and no equipment rates, so none appear here.
The month changes the air, never the water. Come back four weeks later and the spring will still read close to 72.7°F while the afternoon has dropped 6.0 degrees and the night has dropped 8.8. That is why a September float can last two hours and an October one often lasts forty minutes. As for manatees, we could not verify any count for this stretch of river; our manatee guide covers where and when the state’s winter gatherings happen.
On what is free in September, we have nothing verified to report. Our reads on access and pricing came back empty in September 2026, so we list no free day, no free entry and no free launch rather than guess at one.
Ginnie Springs in September: a two-day itinerary
Day one runs on the sun. Leave early enough to be at the water by 7:30, half an hour after the 7:14 sunrise, with the air still near the 69.4°F overnight low. Swim from 8 to 11 while the heat builds. Eat in shade from noon to two, the hottest slice of an 88.1°F day. Back in the water at three, out at six, and you still have ninety minutes of light before the 7:36 p.m. sunset.
Day two goes deeper: a longer drift, or dive water if you are certified and equipped, in the same 72.7°F all morning. Rain changes the surface, not the swim. With 1.4 days a month delivering an inch or more, the realistic disruption is thunder and the drive rather than the float, so keep the afternoon loose, watch the sky from noon, and move the second session to four o’clock if a cell parks overhead.
Ginnie Springs in September vs August and October
| Normal (1991-2020) | August | September | October |
|---|---|---|---|
| Average high | 90.5°F | 88.1°F | 82.1°F |
| Average low | 72.0°F | 69.4°F | 60.6°F |
| Precipitation | 6.40 in | 5.05 in | 2.68 in |
| Days with 0.10 in or more | 10.4 | 6.9 | 4.0 |
| Gap to the 72.7°F spring reading | 17.8°F | 15.4°F | 9.4°F |
August runs 2.4 degrees hotter by day, 2.6 warmer at night, and dumps 1.35 inches more rain across 3.5 extra wet days. October goes the other way: 6.0 degrees cooler in the afternoon, 8.8 cooler before dawn, 2.68 inches of rain on 4.0 wet days. The spring sat at 72.7°F for all of it, and we read no monthly water series for August or October, so no seasonal trend is claimed for the water.
Shift four weeks earlier and you gain the hottest afternoons of the three, which sharpens the swim, and you pay with more than ten wet days; our August page makes that case in full. Shift four weeks later and you gain 2.9 fewer wet days and much drier nights, but a 60.6°F dawn turns a 72.7°F spring into the warmest thing in sight, which is a different trip entirely.
Is September a good time to visit Ginnie Springs?
For swimmers, tubers and divers who can start early, yes. The month hands you hot air, constant water and a 15.4-degree gap between them, which is exactly what people drive here for. For anyone who needs dry afternoons, a firm price before booking, or a fixed schedule, no: 6.9 wet days and a fact base with no verified fee or hours make September a month for flexible plans.
If the rain is what worries you, October is the month to pick. It carries 2.68 inches over 4.0 wet days, less than half of September’s load, and the 82.1°F afternoons are still warm enough to want the water. The trade is the morning: at a 60.6°F normal low, an 8 a.m. swim stops being a pleasure and becomes an act of will.
What September alone offers is August’s swimming with 1.35 inches less rain and 3.5 fewer wet days, under twelve hours and twenty-two minutes of light.
The last word
Book the bed close and set an alarm: the 7:14 sunrise is the whole difference between a September day here and a September day anywhere else in Florida. One more thing worth carrying in your head as you float: Florida law protects a category it calls Outstanding Florida Springs, covering every historic first-magnitude spring as the Florida Geological Survey determines them, plus six more written by name into the statute. The water holding you at 72.7°F belongs to a list the legislature writes.
Sources & data for this guide
- September, August and October air normals (1991-2020), station USW00012816 at Gainesville Regional Airport, FL · NOAA NCEI monthly normals · checked Sep 24, 2026
- Rain-day counts, 0.10 in and 1.00 in thresholds · NOAA NCEI monthly normals, same station · checked Sep 24, 2026
- Daylight, sunrise and sunset for September 15 (11:14 and 23:36 UTC, converted to Eastern Daylight Time) · sunrise-sunset.org · checked Sep 24, 2026
- Spring water at 72.7°F (22.6°C), single instantaneous reading · USGS National Water Information System, station 02322400 Ginnie Springs · read Sep 11, 2026
- Outstanding Florida Springs definition · Florida Statutes 373.802(5), leg.state.fl.us · checked Sep 24, 2026
- Ginnie Springs and Peacock Springs named among popular springs diving destinations · Florida Department of Environmental Protection, Visit a Spring · checked Sep 24, 2026
- Editorial admission: we could not verify an entrance fee, an opening hour or a manatee count. floridastateparks.org returned a 403 to our automated reads on Sep 11, 2026, and the FWC manatee pages render client-side. Fees and hours change · confirm with the operator before you drive.
To plan your stay
- Best Time to Visit Ginnie Springs: Monthly Highs, Rainfall and the Month to Skip
- Ginnie Springs in August: Weather, Water Temperature and How It Compares to July and September
- Ginnie Springs in October: Water Temperature, Air Highs and Rain Days
- Ginnie Springs in July: Heat, Rain Days and 72°F Spring Water