May to June and September to October. Month by month below, with the weather, what's on and what it costs to fly there from your city.
Late April to early June and September to October are named best for warm weather, swimmable sea and smaller crowds than July and August.
6 of the 7 travel guides we read name these months.
Average high and low in Santorini
JanuaryChecking fares…Coldest and wettest window; sea too cold to swim, many venues reduced or closed.Coldest month with some services closed.
FebruaryChecking fares…Highs around 12 to 15C with rain and wind; many hotels, restaurants and ferries reduced or closed.
MarchChecking fares…Slightly more sun and less rain than winter, but cold nights.Not all services are open in March.Cool and changeable; sea still too brisk for swimming.Holy Week and Greek Easter
AprilChecking fares…Warms up; probably the best month for hiking and sightseeing.Greek Orthodox Easter brings traditions and celebrations.Island reopens and wildflowers appear; sea still cool.
Best timeMayChecking fares…Consistently sunny and warm, with low chance of rain.Particularly popular spring month with near-perfect conditions.By late May the sea turns more comfortable and beach clubs prepare for summer.
Best timeJuneChecking fares…Hot and sunny; start of beach season.Crowds build fast toward the end of June.Described as a strong month, with a separate guide naming it the best month.
JulyChecking fares…One of the busiest months; book hotels at least two months ahead.Peak summer: hottest, driest, busiest and most expensive.Feast of Prophet Elias in Fira
AugustChecking fares…Hot and sunny with occasional strong winds, the busiest month.The Assumption of the Virgin Mary is celebrated in summer.Late July through mid-August has the highest crowds and prices.Dormition of the Virgin pilgrimage on Tinos
Best timeSeptemberChecking fares…Often named the best month: warm sea, sunsets, fewer crowds.Hot and sunny but cooling a little; warmer water.Crowds start thinning and swimming stays enjoyable into October.
Best timeOctoberChecking fares…Sea stays warm; prices drop; first rains possible late October.Autumn runs late September to early November with lower prices.Vineyards reach harvest season.
NovemberChecking fares…Some seasonal businesses close and ferries scale back.Often cloudy and cool as winter arrives.Temperatures fall into the teens and many businesses close.
DecemberChecking fares…Quiet and low-key; many businesses closed.Many services closed but a festive atmosphere around Christmas.Weather: Santorini averages from National Observatory of Athens (long-term averages), as listed in its climate table on Wikipedia.
Live fares from your airport. Watch them and we alert you when they drop.
Festivals and seasons through the year
Cancún
The Grand Canyon
Disneyland
Miami
Myrtle Beach
Prague
Bali
Maui
Montreal
Venice
Aruba
New Orleans
Nashville
Disney World
New York
Rome
San Diego
Phuket
Boston
Dubai
Seoul
Florida
Lisbon
Los Angeles
Chicago
Paris
Las Vegas
San Francisco
Edinburgh
Napa
Sydney
Hawaii
Scotland
Punta Cana
Savannah
Washington, DC
Mexico City
Zion National Park
Turks and Caicos
Puerto Vallarta
Honolulu
Banff
Yosemite
Tulum
The Bahamas
Sedona
Seattle
Buenos Aires
London
Charleston
Rio de Janeiro
Palm Springs
Yellowstone
Amsterdam
Toronto
Key West
Orlando
Europe
Austin
Machu Picchu
Cabo San Lucas
Niagara Falls
Colorado
Oregon
Arizona
Acadia National Park
Galapagos
Lake Tahoe
Montana
Kauai
Okinawa
US Virgin Islands
Amalfi Coast
Santa Fe
Destin
Curacao
Utah
Joshua Tree
Patagonia
St. Thomas
Florida Keys
Smoky Mountains
Copenhagen
Death Valley
Mallorca
Madeira
Cape Town
Ibiza
Zanzibar
Lake Como
Madrid
New Mexico
Tennessee
Vermont
Wyoming
Bryce Canyon
Oahu
St. Martin
Hilton Head
Dolomites
Cape Cod
San Antonio
Rocky Mountain National Park
Dublin
Catalina Island
Athens
Asheville
Texas
South America
Shenandoah National Park
Phoenix
North Carolina
Medellín
Cairo
Budapest
Arches National Park
St. John
South Carolina
Reykjavik
Mykonos
Milan
Houston
Hanoi
Canary Islands
Big Island of Hawaii
Atlanta
The Caribbean
St. Barts
South Dakota
Rhode Island
New England
Nassau
Lima
Kyoto
Koh Samui
Colorado Springs
Chiang Mai
Stockholm
Porto
Montego Bay
Michigan
Melbourne
Louisiana
Kuala Lumpur
Kruger National Park
Jeju
Florence
Dallas
Zurich
Tampa
St. Kitts
Osaka
Munich
Moorea
Kailua-Kona
Everglades
Door County
Cusco
Calgary
Boracay
Bonaire
Swiss Alps
St. Croix
Seville
San Juan Islands
New Hampshire
Minnesota
Mazatlán
Manila
Kentucky
Isla Mujeres
Guam
French Riviera
Fort Lauderdale
Cinque Terre
Asia
Algarve
Virginia
Tenerife
Sapporo
Nairobi
Mumbai
The Hamptons
Grand Teton National Park
Finger Lakes
Charlotte
Bogotá
Auckland
Maine
Bora Bora
Olympic National Park
Redwood National Park
Sequoia National Park
Big Bend National Park
Mackinac Island
Sint Maarten
Nantucket
Outer Banks
California
Big Sur
Crater Lake
Scottsdale
Nice
Mount Rainier
Cozumel
Badlands National Park
Salt Lake City
Denali
Philadelphia
Tucson
Provence
Guadalajara
Albuquerque
Upper Peninsula
Sonoma
Memphis
Idaho
Da Nang
Cotswolds
Arkansas
St. Louis
Capri
Glacier National Park
Barcelona
Vancouver
Denver
Istanbul
Riviera Maya
Carmel-by-the-Sea
Santiago, Chile
Naples, Italy
Central America
Minneapolis
Sarasota
Halifax, Nova Scotia
Pittsburgh
Helsinki
Pensacola
Johannesburg
Brisbane
Málaga
Phu Quoc
Perth
Dubrovnik
Corpus Christi
Massachusetts
Oklahoma
Torres del Paine
Czech Republic
Ho Chi Minh City
Anchorage
Boise
Louisville
Juneau
Quito
West Virginia
Wisconsin
Canyonlands National Park
Baja California
Blue Ridge Mountains
Fort Myers
Detroit
Kansas City, Missouri
Kathmandu
Reno
Cebu
Brussels
Guangzhou
Chattanooga
Antalya
Daytona Beach
Cairns
Hilo
Alabama
Connecticut
New Jersey
Pennsylvania
Capitol Reef National Park