Crystal River Weather by Month: Air, Springs and Manatee Season

Crystal River has two weather reports, and visitors need both. The first is the air: hot, wet summers, and mild, mostly dry winters broken by cold fronts. The second is the water. The springs that feed Kings Bay run at 72 degrees year-round, according to the Southwest Florida Water Management District, while the Gulf beside them swings from summer bathwater down to around 50 degrees in winter.

That gap is what drives the town’s calendar. When the Gulf drops below 68°F, manatees crowd into the springs, so the coldest weeks of the year are the best for seeing them. The warmest months bring scalloping, swimming and paddling instead. Below: NOAA’s monthly averages, what each season is like on and in the water, how hurricane season fits in, and how to pick your month by what you want to do.

Crystal River weather at a glance

NOAA’s 1991-2020 climate normals do not include a station in Crystal River itself. The nearest with full temperature records is Inverness 3 SE, inland in the same county on the Highway 44 road from Orlando. Treat these as a guide to the area rather than the waterfront.

Month	Average high	Average low	Rainfall	On the water
January	69.3°F	42.6°F	2.97 in	Peak manatee season
February	72.3°F	45.6°F	2.69 in	Peak manatee season
March	76.8°F	49.4°F	3.29 in	Season ends March 31
April	82.0°F	54.9°F	2.69 in	Paddle craft allowed into Three Sisters
May	87.9°F	61.8°F	3.09 in	Warm and fairly dry
June	90.1°F	69.2°F	8.13 in	Rainy season and hurricane season begin
July	90.6°F	70.9°F	7.80 in	Scallop season opens July 1
August	90.4°F	71.1°F	8.69 in	Wettest month
September	88.8°F	69.0°F	5.81 in	Scallop season closes Sept. 24
October	83.7°F	61.2°F	2.92 in	Cooling, drier
November	76.9°F	51.7°F	1.83 in	Driest month; season starts November 15
December	72.4°F	45.7°F	2.48 in	Manatee season

The pattern is simple. From June to September the highs sit around 90°F and those four months bring more rain than the other eight put together. From November to March the days are mild and the nights cool, with the driest month, November, right at the start of manatee season.

Two temperatures that matter: the springs and the Gulf

For most visitors the most important number is not the air temperature but the gap between the springs and the sea:

The springs: 72 degrees all year. The water district explains that the water comes from the limestone aquifer, giving a cool break in summer and a warm bath in winter. The City of Crystal River gives the same 72°F (22°C) for the spring off Hunter Springs Park. Citrus County’s tourism office quotes 72° to 74° F for the county’s main spring systems.
The Gulf: as low as around 50 degrees in winter. That is the water manatees are escaping.

Three thresholds sit between those two figures:

68°F: FWC says manatees cannot tolerate prolonged exposure to water below about 68°F and move to warm water; the City’s Three Sisters Springs Center says a cold day with the Gulf below 68 degrees is your best chance of manatees inside the spring.
62.2°F: when the Gulf drops below 62.2 degrees Fahrenheit, the Fish and Wildlife Service can close in-water access to Three Sisters Springs to protect the crowd of manatees inside.
Extreme cold: the refuge may also temporarily close Three Sisters, House and Jurassic springs, or widen its sanctuaries, during severe cold events.

So the best manatee weather and the best swimming weather are opposites. A sharp cold front fills the springs with manatees and may close the most famous one to swimmers at the same time. If you are booking a swim, our guide to swimming with manatees explains where the tours go when a spring is shut.

Winter (December to February): manatee season at its peak

Winter is short and mild by northern standards. NOAA’s Inverness normals give highs of 69.3°F in January, 72.3°F in February and 72.4°F in December, with lows in the low to mid 40s. Inland nights can still freeze: the station averages 6.4 nights at or below 32°F in January, 3.6 in December and 3.5 in February.

What that means on the water:

Manatees in numbers. The refuge’s manatee season runs from November 15 to March 31, and the refuge counts over 600 manatees migrating to Kings Bay each winter. The City of Crystal River says the best viewing comes with cold fronts and high tides.
Sanctuaries closed. All seven warm-water sanctuaries are in force, and paddle craft are not allowed inside Three Sisters Springs.
Longer refuge hours. The refuge Visitor Center and Nature Store opens 9:00 to 4:00 every day, entry free, and ranger-led programs run daily at Three Sisters Springs.
Higher boardwalk prices. Three Sisters Springs adult admission is $20.00 from November 15 to March 31, against $12.50 the rest of the year; children 6-15 pay $7.50 either way.

The spring water at 72 degrees feels warm on a cold morning, but you will still be in it for a while, and getting out into cool air is the hard part. That is why several swim tours here supply wetsuits, and some use heated boats. Rain is modest, at around 2.5 to 3 inches a month.

Spring (March to May): the herd disperses

March is a transition month. Highs reach 76.8°F, the season still runs to March 31, and on a cool spell plenty of manatees remain. After that they move out: FWC notes that in warm weather manatees leave the sanctuaries and spread along the coast, so a sighting may take some travel and luck.

The rules relax as the season ends:

From April 1 paddle craft may enter Three Sisters Springs, and scuba diving there is permitted until November 14.
The boardwalk drops to summer pricing, and the refuge Visitor Center switches to 10:00 to 4:00, Monday to Friday.
Births: FWC says manatee births usually peak in spring, so a cow with a small calf is a real possibility.

April and May are dry and warming, with highs of 82.0°F and 87.9°F and only around three inches of rain a month. For paddling and spring swimming without the summer storms, they are the sweet spot.

Summer (June to September): heat, storms and scallops

Summer is hot, humid and wet. NOAA’s normals give highs of 90.1°F in June, 90.6°F in July and 90.4°F in August, with lows near 70°F. June brings 8.13 inches of rain, July 7.80 and August 8.69, the wettest month, so build some slack into any plan that depends on a boat.

The springs come into their own. At 72 degrees they are a cool break from the heat, Hunter Springs Park has a roped-off swimming area beside its spring, and the park stays open from 8 am to 8 pm from April 1 through Labor Day. Some manatees stay all summer: Citrus County’s tourism office says up to 100 remain in the county’s waters year-round, and tours run all year.

Summer also means scallops. FWC’s bay scallop season for Levy, Citrus and Hernando counties, including Crystal River and Homosassa, runs July 1 through Sept. 24, with a daily limit of 2 gallons of whole scallops or 1 pint of meat per person. Our guide to things to do in Crystal River covers how a scalloping trip works.

Fall (October and November): the quiet window

October is the quiet month. Highs drop to 83.7°F, lows to 61.2°F, and rain falls back to 2.92 inches. November is cooler again, 76.9°F by day and 51.7°F at night, and the driest month of the year at 1.83 inches.

On November 15 the manatee season starts: the sanctuaries close, Three Sisters Springs shuts to paddle craft, the boardwalk moves to winter pricing and the refuge’s daily programs begin. Early in the season the first cold fronts bring the first big groups, but numbers depend on how cold the Gulf gets, so a warm November can be slow.

Hurricane season

The National Hurricane Center’s Atlantic hurricane season, which includes the Gulf, runs from June 1 to November 30. On its 1991-2020 averages, a season brings 14 named storms, 7 hurricanes and 3 major hurricanes. The first hurricane typically forms in early to mid-August and the first major hurricane in late August or early September.

For a trip to Crystal River that means:

August to October carry the most risk. That overlaps the end of scallop season and the quiet fall weeks.
Manatee season runs from November 15, two weeks before hurricane season formally ends, and is otherwise clear of it.
Keep plans flexible. A storm in the Gulf can cancel boat trips at short notice, so leave a spare day if you are booking a boat for late summer.

Check the National Hurricane Center before you travel in season, and read the cancellation terms on any tour. Weeki Wachee Springs State Park, for one, says it does not refund tickets for weather cancelations.

Opening hours through the year

Daylight and the season both change what is open, and several of Crystal River’s places switch schedules on the same dates as the manatee season:

Three Sisters Springs boardwalk: the trails open 8:30am to 4:30pm year-round, closed only on Good Friday, Memorial Day, Independence Day, Labor Day, Veterans Day, Thanksgiving and Christmas. The shuttle from the Three Sisters Springs Center runs continuously over the same hours, and the last ticket is sold at 3:30pm, so on a short winter afternoon arrive early.
In-water access to Three Sisters Springs: sunrise to sunset daily, unless the Fish and Wildlife Service has closed the spring for cold.
The refuge Visitor Center and Nature Store: 9:00 to 4:00 every day from November 15 to March 31; 10:00 to 4:00 on weekdays from April 1 to November 14.
Hunter Springs Park: 8 am to 8 pm from April 1 through Labor Day, 8 am to 7 pm until October 31, and 8 am to 5:30 pm from November 1 through March 31.
Homosassa Springs and Weeki Wachee: both state parks open 9 a.m. to 5:30 p.m. Ticket counters at Homosassa close at 4:45 p.m.

Low water can also change what runs. In 2026 Homosassa Springs suspended its shuttle boats from February 4, and Weeki Wachee paused its daytime Wilderness River Cruise from December 12, 2025, both because of low water levels. The water district notes that rainfall drives the aquifer and so the flow from the springs, which is one reason a dry winter can affect boat services even when the weather on the day is fine. Check a park’s own page before you set off.

Picking your month by what you want to do

To see the most manatees: January and February, ideally the day after a cold front, at high tide. December and March are good too. Expect the highest boardwalk price and the most people on the water.
To swim with manatees in comfort: late November or early March, when manatees are still there but the air is milder. Book a tour that can move to other springs if Three Sisters closes.
To paddle into Three Sisters Springs: April 1 to November 14, the only window when paddle craft are allowed inside. April and May are the driest of those months.
To swim in the springs: May to October, when the 72-degree water is a relief. Hunter Springs Park is the easy option in town.
To go scalloping: July 1 to Sept. 24, the summer season FWC sets for Citrus County.
For quiet: October and early November, between the rains and the manatee crowds.

For the drive in from Orlando or Tampa, and when to set off so you reach the water early, see our Orlando and Tampa guide.

Rainy-day and cold-day options

The weather rarely ruins a whole day, but there are good fallbacks:

The refuge Visitor Center, on Kings Bay, is free and explains the manatees and their habitat. It opens daily in manatee season and on weekdays the rest of the year.
Ellie Schiller Homosassa Springs Wildlife State Park has an Underwater Observatory where you can watch fish and manatees below the surface of the spring without getting wet. It opens 9 a.m. to 5:30 p.m.; adults pay $13.
Crystal River Archaeological State Park has a museum, open 9 a.m. to 5 p.m. Thursday to Monday, beside its mounds.
The Three Sisters boardwalk is open every day and is not affected by the in-water closures, so on the coldest days it is the surest way to see manatees.

What to pack

For winter: layers for cool mornings, a warm jacket for the boat ride out and back, and a dry change of clothes. If you plan to swim, a wetsuit makes the difference; the swim tours listed on this site include one.
For summer: sun protection, plenty of water and a rain layer for the wettest months.
All year: polarized sunglasses help you see into the springs from above, and a dry bag protects phones and keys on a boat or kayak. Camera extension poles are not allowed at Three Sisters Springs.

The details of the season, the sanctuaries and the passive-observation rules are in our guide to Three Sisters Springs and the manatee rules, and the animals themselves are the subject of our article on Crystal River’s manatees.

Frequently asked questions

What is the best month to visit Crystal River?

For manatees, January and February, when cold fronts push them into the springs; the refuge’s season runs from November 15 to March 31. For swimming and paddling in the springs, April and May are warm and fairly dry. For scalloping, July to September.

How cold does it get in Crystal River?

Not very by day. NOAA’s normals for nearby Inverness give January highs of 69.3°F and lows of 42.6°F, with an average of 6.4 nights at or below freezing that month inland. The spring water stays at 72 degrees whatever the air does.

What is the water temperature in Crystal River?

The springs that feed Kings Bay are 72 degrees year-round, according to the Southwest Florida Water Management District. The Gulf is much more variable and can drop to around 50 degrees in winter.

When is the rainy season in Crystal River?

June to September. NOAA’s normals for Inverness show between 5.81 and 8.69 inches a month in those four months, against 1.83 to 3.29 inches the rest of the year.

Is Crystal River in hurricane season?

Yes: the Atlantic hurricane season, which includes the Gulf, runs from June 1 to November 30, with the most activity usually from August. Manatee season starts on November 15 and is otherwise outside it.