Clearwater in May: Weather, Sea Temperature, Crowds and Prices

CLEARWATER · MAY · GULF COAST

Clearwater’s May normal is an average high of 87.1°F, an average low of 69.8°F and 2.73 inches of rain for the whole month. The water off the beach averages 82.5°F. Four weeks later, June’s normal rainfall is 8.86 inches, more than triple, spread across 10.7 wet days instead of 4.2. Those two rainfall figures separate a May vacation from a June one on exactly the same sand.

What May takes back is the night air, with lows of 69.8°F against April’s 64.2°F, and afternoons running 5.3 degrees hotter than April’s 81.8°F. What it returns is the Gulf: 82.5°F in May against 76.5°F in April, a six-degree jump in four weeks. Anyone booking a beach week around a school calendar is making that trade, and the numbers below price it.

On this page

• Clearwater weather in MayHighs of 87.1°F, 4.2 wet days
• Sea temperature in May82.5°F, and how that figure is measured
• Crowds, lodging tax and bookingThe 12%, and what we could not price
• Things to do in Clearwater in MayHoneymoon Island, Caladesi, Anclote Key
• A two-day Clearwater itineraryHour by hour, plus the rain version
• May, April or June?How the three months compare
• Is May a good time to visit Clearwater?The verdict, traveler by traveler

The base itself, the rental-car question and the twelve-month view each have their own page: where to stay in Florida, getting around Florida and the best time to visit. Flights for this coast land at St. Petersburg-Clearwater International (PIE) or at Tampa. Every figure here is dated to May, and the April and June columns further down run on the same sources.

Clearwater weather in May: average highs, lows and rain days

Every figure here comes from one thermometer rather than a grid cell: NOAA’s 1991-2020 monthly normals for station USW00012873, listed as ST PETERSBURG INTL AP. The gauge sits at the airport between St. Petersburg and Clearwater, on the bay side of the peninsula. Clearwater Beach gets a sea breeze the airport does not feel, so the difference falls on the afternoon maximum and barely touches the overnight low of 69.8°F. Read 87.1°F as the inland-side number and expect the sand to run a little softer on a breezy afternoon.

Measurable rain falls on 4.2 days in an average May, roughly one day in seven, and 0.9 of a day reaches an inch or more, so a single real soaking is the average month’s share. The total of 2.73 inches sits far closer to April’s 2.57 than to June’s 8.86. In practice that means a wet hour rather than a wet week: a canceled boat morning, lunch pushed indoors, sand again by four o’clock.

The spread between the 87.1°F afternoon and the 69.8°F night is 17.3 degrees, and nearly all of it arrives after dark. A pool deck at ten in the evening is a different climate from the same deck at three in the afternoon. One light layer goes in the bag beside the swimsuits, and a hat does more work in May than a jacket ever will.

On May 15 the sun rises at 6:39 a.m. and sets at 8:15 p.m. local time, converted from the UTC times published by sunrise-sunset.org, for 13 hours 36 minutes of daylight. Dinner is where that lands: beach time runs to seven without hurrying anyone, and a Gulf-facing table at eight still gets the color. An early start pays twice, since a 7 a.m. walk on the sand happens in full light, close to the night’s 69.8°F.

Can you swim in Clearwater in May? Sea temperature and what it feels like

Sea surface off Clearwater averages 82.5°F in May in the Open-Meteo Marine record, taken as the mean of daily maxima over 2015-2024. The method matters: a daily maximum sits a shade above a 24-hour mean, so the water you meet at eight in the morning is slightly under the headline. That figure also comes from a marine model over a different decade than the air normals, which are station readings from 1991 to 2020.

At 82.5°F the Gulf asks nothing of you. Children stay in until somebody makes them come out, adults skip the first-two-minutes gasp, and no one is renting a wetsuit. April’s 76.5°F in the same record is the version where you walk in slowly and talk yourself down the last foot. The one designated swimming area the state counts at Honeymoon Island is where most families end up, because it is the island you can park on.

On wind and swell there is nothing to give you for May. No wave-height or wind series for this stretch of coast could be read, and no amount is invented in its place. Check the marine forecast on the morning of a boat day, especially before committing to the crossing to Caladesi Island or Anclote Key, where the return trip depends on a boat.

How busy is Clearwater in May? Crowds, prices and the demand peak

May falls between the spring-break weeks and the start of the summer school holidays, and that calendar position is all we can state with data in hand. No monthly occupancy series and no monthly room-rate series for Pinellas County could be read, so the months go unranked by price here. The twelve-month shape of Florida’s season is laid out in the best time to visit Florida.

On lead time, be concrete about supply instead. Honeymoon Island holds 2,021 parking spaces, the largest count of any state park in Florida’s 2024 inventory, and that lot is why the island absorbs a Saturday that Caladesi cannot. Caladesi has no parking at all, so its limit is the boat. Lock the room and the rental car as soon as the dates are certain, and keep a cancelation window on anything that floats.

Pinellas County levies a 6.0% transient rental tax on every night booked, collected alongside the 6% state sales tax, so 12% lands on the nightly rate you were quoted. Florida’s Department of Revenue publishes the county rate in form DR-15TDT, revision 03/25. A resort fee is something else: the property sets it, and it carries no tax status. On a seven-night stay the 12% alone moves the real cost enough to change which quote wins, so compare them after tax.

The one upgrade that changes the month is a bed with the Gulf on its doorstep. With sunset at 8:15 p.m. and water at 82.5°F, a beachfront room buys the swim at seven in the morning and the second one after dinner, with no parking lot in between. Everywhere else the money is interchangeable: a rental car, a mid-island motel and a cooler produce the same beach day. Our lodging guide handles the base question in full.

Things to do in Clearwater in May: Honeymoon Island, Caladesi and Anclote Key

In May both halves of the day work at once: water at 82.5°F, air topping out at 87.1°F, and 2.73 inches of rain across the whole month. June warms the sea to 86.3°F and pushes rainfall to 8.86 inches over 10.7 wet days, which reshuffles every outdoor plan on the trip. April keeps rainfall low at 2.57 inches but leaves the Gulf at 76.5°F, cool enough that swimming becomes a decision instead of a default.

Honeymoon Island State Park, as the state counts it in the 2024 inventory: 4 miles of beach, 2,021 parking spaces, 3.4 miles of hiking trail, 1,671 feet of boardwalk and one designated swimming area. Caladesi Island State Park: 3 miles of beach, 2.5 miles of trail, one canoe, kayak and tube launch, and zero parking spaces, since it is reached by ferry or by your own boat. Anclote Key Preserve adds 6.7 miles of beach and 1,408 feet of boardwalk, also boat-only. Entrance fees and opening hours could not be verified for any of the three.

Trail miles become a morning proposition in this month. Walk Honeymoon’s 3.4 miles before ten and you do it closer to the night’s 69.8°F than to the afternoon’s 87.1°F; start at two and the sun is doing the deciding. The beach miles go the other way. Four at Honeymoon, three at Caladesi, 6.7 at Anclote, all of them improved by a sea at 82.5°F against April’s 76.5°F. Same sand in both months, different water.

On what costs nothing, the record is thin: no park entrance fee and no ferry fare for these islands could be read from the operators, so budget for all of them. The free part is the daylight. Thirteen hours 36 minutes on the fifteenth, and a sunset at 8:15 p.m. that adds a full beach hour to any afternoon that started late.

Clearwater in May: a two-day itinerary

Day one runs on the light. Sunrise at 6:39 a.m. puts a 7 a.m. walk on Clearwater Beach close to the night’s 69.8°F. Drive to Honeymoon Island early and take one of the 2,021 spaces, swim in the designated area while the Gulf reads 82.5°F, then cover the 3.4 miles of trail before the afternoon settles toward its 87.1°F normal. Eat indoors from noon to three. Back on the sand by four, with dinner timed so the 8:15 p.m. sunset arrives at the table.

Day two belongs to the boat: the crossing to Caladesi for 3 miles of beach with no car within reach, or the longer run to Anclote Key’s 6.7 miles and 1,408 feet of boardwalk. Fares and departure times could not be verified, so call the concession the day before. If the sky turns, recall what 4.2 wet days across 31 usually buys you, an hour of rain inside a long day. Keep the island for the next clear morning and give the gray stretch to Tampa or St. Petersburg indoors, with our Florida things to do list for options.

Clearwater in May vs April and June

April holds 81.8°F afternoons, 2.57 inches of rain and a Gulf at 76.5°F. May adds 5.3 degrees to the afternoon and six degrees to the water for 0.16 inch more rain, a bargain in anyone’s arithmetic. June adds another 2.5 degrees of air and 3.8 of water, then more than triples the rainfall to 8.86 inches over 10.7 wet days. Air normals for all three come from the same NOAA station and the same 1991-2020 period; the sea figures come from the marine model, 2015-2024.

Shift four weeks back to April and you trade six degrees of water for cooler afternoons and one fewer wet day. Shift four weeks forward to June and you buy the warmest sea of the three at 86.3°F, paying 6.13 more inches of rain and 6.5 more wet days for it. Sleeping is the quiet variable: June nights average 74.6°F against May’s 69.8, which changes how a fan-only rental feels at two in the morning.

Is May a good time to visit Clearwater?

For a family whose swim matters more than the sky, May is a yes: 82.5°F water, 4.2 wet days and 13 hours 36 minutes of daylight to spend on it. For anyone planning midday hiking, cycling or a long boardwalk walk, the month is a harder sell at an 87.1°F normal afternoon, and the 17.3-degree drop after dark arrives too late to help.

When the answer comes back no, move the trip to April: 81.8°F afternoons, 3.1 wet days, 2.57 inches, with the whole trade sitting in a 76.5°F sea. Waiting for June gets the warmest water of the three at 86.3°F, but rainfall goes to 8.86 inches and wet days to 10.7, so a beach week arrives with an indoor plan attached to it.

Among April, May and June, May is the one month pairing a sea above 80°F with under three inches of rain.

The last word

Decide the water first and the rest of the trip sorts itself. If 82.5°F is the point, book May and take the 87.1°F afternoons with it; if the afternoons are the point, book April and accept a slower walk into the Gulf. One note for the flight: St. Petersburg-Clearwater International boarded 1,228,048 passengers in 2024, a small hub in the FAA’s classification, with Tampa the larger option a short drive away. Whichever airport wins, add the 12% to the room quote before you call the booking done.

Sources & data for this guide

• May normals (87.1°F, 69.8°F, 2.73 in, 4.2 days at 0.10 in, 0.9 day at 1 in) · NOAA NCEI monthly normals 1991-2020, station USW00012873 “ST PETERSBURG INTL AP” · checked Sep 13, 2026
• April and June normals · same NOAA station and period, not estimates · checked Sep 13, 2026
• Sea surface 82.5°F (May), 76.5°F (April), 86.3°F (June), mean of daily maxima 2015-2024 · Open-Meteo Marine API · checked Sep 13, 2026
• Daylight of 13 h 36 min and sun times for May 15, converted from UTC to local time · sunrise-sunset.org · checked Sep 13, 2026
• Park counts for Honeymoon Island, Caladesi Island and Anclote Key Preserve · Florida Department of Environmental Protection, Recreational Facilities Inventory, 2024 annual report · checked Sep 13, 2026
• Transient rental tax of 6.0% for Pinellas County alongside 6% state sales tax · Florida Department of Revenue, form DR-15TDT, revision 03/25 · checked Sep 13, 2026
• PIE passenger boardings, 1,228,048 in calendar year 2024, small-hub classification · Federal Aviation Administration · checked Sep 13, 2026
• Editorial admission: no bus, ferry or park fee and no opening hour could be verified for Clearwater. The operator pages tried on Sep 11, 2026 returned errors or rendered only in a browser, so no amount appears above. Check operators when you book.