Blue Spring in May: Weather, Water Temperature, Crowds and Parking

BLUE SPRING · MAY · 1991-2020 NORMALS

By mid-May the air over central Florida runs an average high of 88.2°F while the spring run below the boardwalk sits at 74.3°F, and those fourteen degrees are the whole reason to come now. Step off the walkway into water that has no season and the shock lasts about four seconds. In April, at 83.2°F, the air rarely pushes anyone in. In June it does, and so do 11.8 rainy days.

May also decides itself in the parking lot. The state counts 187 spaces at Blue Spring State Park, and when they fill, the gate closes: a 9 a.m. arrival on a Saturday is a different trip from a 2 p.m. one. The park’s year-round basics, cabins and boardwalk included, live on the main Blue Spring guide, and April has its own page.

On this page

• Blue Spring weather in MayHighs of 88.2°F, 3.66 inches, 5.3 wet days
• How warm the water is in May74.3°F at the vent, 88.2°F in the air
• Crowds and parking on a May weekend187 spaces, six cabins, and when to book
• Things to do at Blue Spring in MayThe swimming area, the paddle launch, the boardwalk
• A two-day plan for Blue SpringTwo days set to a 6:32 a.m. sunrise
• May, April or JuneHow the three months differ, month by month
• Is May a good time to visit Blue Spring?Our verdict, and who should shift to April

Three sources carry the month: NOAA for the air, a USGS gauge at the vent for the water, and Florida’s own facilities inventory for what the park holds. Where they stop, we say so, and they stop in two places that matter to anyone planning a drive.

Blue Spring weather in May: average highs, lows and rain days

The air figures come from NOAA’s National Centers for Environmental Information, 1991-2020 monthly normals, station USW00012841 at Orlando Executive Airport. That thermometer sits about 27 miles (44 km) from the spring, and every figure here describes the air, never the water: an average high of 88.2°F, an average low of 68.7°F, 3.66 inches of rain. A station normal is a real instrument with a thirty-year record behind it rather than a modeled grid cell, and the 27 miles are the only caveat to carry with it.

Measurable rain falls on 5.3 days in an average May, roughly one day in six. Of those, 1.3 days deliver an inch or more, so the month’s 3.66 inches arrive in a couple of heavy sittings rather than as gray drizzle spread over four weeks. Put the swim and the boardwalk in the morning and keep lunch or the drive for the hour the sky goes dark, and a wet May day costs an afternoon instead of a day.

Between the 88.2°F afternoon and the 68.7°F pre-dawn low there are 19.5 degrees, and you feel all of them at six in the morning on a shaded walkway. Pack a long-sleeve layer you will carry by nine, a hat for the unshaded platforms, and two towels rather than one: 74.3°F water plus oak shade is a chilly combination until the air catches up.

On May 15 the sun rises at 6:32 a.m. and sets at 8:11 p.m. local time, 13 hours 39 minutes of daylight, calculated from sunrise-sunset.org. That is a genuine after-work hour of light. We could not verify the park’s closing time, so do not build a plan on an 8 p.m. swim without checking the state park system first.

How warm is Blue Spring in May? Air highs and the 74.3°F water

Mid-afternoon air averages 88.2°F, dawn averages 68.7°F, and the spread is 19.5 degrees. The vent ignores both. On September 11, 2026 the USGS gauge at station 02235500 read 74.3°F (23.5°C), a single instantaneous reading rather than an average of daily maxima or a mean over 24 hours, and it reads close to that on every day of the year. The same gauge measured 168 cubic feet per second leaving the vent. That volume keeps the water clear: it is replaced faster than it can cloud.

In practice, you dress twice. A light layer goes on for the early walk down the boardwalk and comes off before nine. By one in the afternoon the swimsuit is the outfit, and the 74.3°F water reads as relief rather than as a dare. Water shoes beat flip-flops on wet planks, and a dry shirt in the car turns the drive home into a comfortable hour.

Our normals carry monthly means, not a count of nights at or below freezing, so we give no frost figure for May. The coldest number we can stand behind is the 68.7°F average low, which is a sweatshirt at 6:30 a.m. and nothing more.

How busy is Blue Spring in May? Parking, cabins and booking ahead

May opens Florida’s wet half of the year on paper while its rainfall still behaves like spring: 3.66 inches against June’s 8.17. Demand follows the school calendar more than the sky, and the month sits just ahead of the summer wave. We found no occupancy series and no monthly room-rate data for the area, so we crown no month cheap and no month expensive.

What we can count is capacity, and it is small. Six cabins is the park’s entire lodging inventory, and 187 parking spaces are the ceiling on a Saturday. Treat a May weekend as a booking problem rather than a driving problem: lock the dates as soon as they are firm. Check the booking system for the exact reservation window rather than trusting a rule of thumb.

On money, we are short. We could not verify the local lodging-tax rate, so we give no percentage, and we could not verify Blue Spring’s entrance fee or its opening hours either: floridastateparks.org returned a 403 to our automated reads on September 11, 2026. Fees vary by park and by season, so a price copied from another Florida park does not transfer here. Our Florida cost guide handles the rest of the budget.

One upgrade genuinely changes May: sleeping inside the gate. A cabin puts you past the parking math entirely, on the boardwalk at 6:45 a.m. with the run to yourself and the swimming area empty for two hours. Every other expense buys comfort. That one buys the morning.

Things to do in Blue Spring in May: the swimming area, the paddle launch and the boardwalk

Nobody needs talking into the water at 88.2°F. That is May’s advantage over April, where an average high of 83.2°F still leaves the 74.3°F run feeling like a decision, and over June, whose 11.8 wet days interrupt the afternoons you would otherwise spend floating. Paddling works all three months, but May is when the swim and the paddle fit into the same day without a jacket at either end.

Florida’s 2024 facilities inventory counts 3,050 feet of boardwalk along the spring run, 3 observation platforms, 1 designated swimming area, 1 launch for canoes, kayaks and tubes, 6 cabins and 187 parking spaces. The USGS gauge adds the two numbers you meet in the water itself: 74.3°F and 168 cubic feet per second coming out of the vent, which is why you can see your own feet from the surface.

None of that moves with the calendar, and neither does the water. The air is the only variable. At 88.2°F the shaded stretches of boardwalk become the parts you linger on, the open platforms turn into brief stops, and the run stops being scenery on the way to something else. Manatees are a separate question: we could not verify any count or season dates, so start with our manatee guide and the park’s own updates.

With no entrance fee verified, we name no free day. What costs nothing extra once you are through the gate is the full 3,050 feet of boardwalk and all three observation platforms, which is the dry-shoe version of this month and takes under an hour at a slow pace.

Blue Spring in May: a two-day itinerary

Day one runs on the light. Sunrise at 6:32 a.m. means the 187 spaces are a non-issue if you are in the lot by eight, and the boardwalk is at its coolest for the first walk down to the vent. Swim between ten and noon, once the air has climbed well past the 68.7°F overnight low. Take lunch and any driving in the early afternoon, then come back for the long tail of light that runs to 8:11 p.m.

Day two puts the boat first. The launch takes canoes, kayaks and tubes, and the run is calmest before the swimming area fills. If the sky turns, remember the shape of May’s rain: 5.3 wet days, 1.3 of them bringing an inch or more. That is a hard hour, not a lost day. Sit it out over a long lunch, then take the platforms and the shaded boardwalk while the water is still 74.3°F and the lot has thinned.

Blue Spring in May vs April and June

Five degrees separate April’s 83.2°F from May’s 88.2°F, and another 2.5 separate May from June’s 90.7°F. Rain is where the three stop resembling each other: 2.70 inches, then 3.66, then 8.17, with wet days climbing from 3.9 to 5.3 to 11.8. The vent takes no notice at 74.3°F, so the swim is identical in all three months and only the walk to it changes.

Shift back four weeks and you trade 5 degrees of afternoon air for 1.4 fewer wet days and cooler 62.8°F mornings. Shift forward four weeks and you gain 2.5 degrees and pay 6.5 extra wet days plus 4.51 inches of rain. Anyone timing a wider Florida trip around this should read the twelve-month state view before locking flights.

Is May a good time to visit Blue Spring?

Yes, for swimmers, paddlers and anyone who wants hot air over cold water without a summer rain calendar. An 88.2°F afternoon makes the 74.3°F run feel engineered for the day. No, for travelers who need wildlife certainty, or who want long midday hikes: at that temperature, the unshaded parts of the park are a morning activity and nothing else.

If the answer is no, April is the swap. It runs 83.2°F by day, 62.8°F at night, 2.70 inches of rain across 3.9 wet days, which means more usable midday hours and fewer people in a lot of 187 spaces. Families juggling school dates will find the trade-offs laid out in our Florida with kids guide.

May alone gives you the hottest air the boardwalk sees before wet days more than double, 88.2°F over just 5.3 of them.

The last word

Book a cabin or set an alarm: with six cabins and 187 spaces, the May day you actually want starts in the parking lot before nine and ends with the sun still up at eight. And the run you swim in carries a legal title on top of its temperature. Florida statute 373.802(5) classes every historic first-magnitude spring, plus six more named by hand in the law, as an Outstanding Florida Spring, and the 168 cubic feet per second leaving that vent is what the designation is built on.

Sources & data for this guide

• Air normals for April, May and June, station USW00012841 at Orlando Executive Airport, about 27 miles from the spring · NOAA NCEI monthly normals 1991-2020 · checked Sep 24, 2026
• Sunrise 6:32 a.m., sunset 8:11 p.m. and 13 h 39 min of daylight on May 15, converted from UTC to local time · sunrise-sunset.org · checked Sep 24, 2026
• Water temperature 74.3°F (23.5°C) and flow of 168 cubic feet per second, a single instantaneous reading rather than a monthly average · USGS National Water Information System, station 02235500 Blue Spring · checked Sep 24, 2026
• 187 parking spaces, 1 designated swimming area, 1 paddle launch, 3,050 feet of boardwalk, 3 observation platforms, 6 cabins · Florida Department of Environmental Protection, Recreational Facilities Inventory, 2024 annual report · checked Sep 24, 2026
• Outstanding Florida Springs definition · Florida Statutes 373.802(5) · checked Sep 24, 2026
• We could not verify an entrance fee, an opening hour or a manatee count: floridastateparks.org returned 403 to our automated reads and the FWC manatee page renders client-side · checked Sep 24, 2026

To plan your stay

• Best Time to Visit Blue Spring: Weather by Month, Manatee Season and the Quiet Weeks
• Blue Spring in April: Weather, Water Temperature, Crowds and Parking
• Blue Spring in June: Water Temperature, Rain Days and Parking
• Blue Spring in March: Weather, Water Temperature and Parking

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• Wekiwa Springs: Water Temperature, Swimming Area and the 325-Space Lot
• Silver Glen Springs, Florida: Swimming, Clear Water and Weekend Crowds