Weather in Santorini in June

How June compares

June is the 4th warmest month of the year in Santorini and ranks 118th of 134 destinations we compare for June - see where else is hot in June. Within Greece it is 43rd of 44 (Greece in June). Against London's average high of 19.6°C in June, Santorini is 3.8°C warmer by day and 8.6°C warmer at night.

Daytime and night-time in June

The typical June day in Santorini peaks at 23.4°C, but that is an average: the warmest 10% of days reach 25.8°C or more. Roughly 1 in 6 days top 25°C and 1 in 333 pass 30°C. Nights average 19.9°C; one night in ten drops to 17.8°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest June day here reached 32.2°C (2017-06-30) and the coldest night 13.7°C (1991-06-01).

Rain in June

Dry (3 rainy days or fewer): about 1 days with 1 mm or more, 1 mm in total. Year to year it varies a lot - the wettest June was 2018 with 19 mm, the driest 1991 with 0 mm. Humidity averages 73%.

Sea temperature in June

The sea averages 22.2°C - warm enough to swim (22°c+). Depending on the year it ranges from 21.4°C to 22.9°C. For the warmest sea here, come in August (24.6°C).

Sunshine and daylight

Around 13.4 hours of sunshine a day (estimated from cloud cover), 14.5 hours of daylight: the sun rises about 06:00 and sets about 20:38 local time in mid-June. Average cloud cover is 8%.

Is June a good time to visit Santorini?

Yes - it is one of the better months: warm days, little rain and long sunny days. The best months for Santorini on our scoring are July, August, September; months averaging 25°C or more: Jul, Aug.

Warm days without routine extreme heat

Pack mainly light clothing, but do not plan around relentless heat. Days reach 25°C only 17% of the time, so June suits travellers who prefer being outside in comfortable warmth rather than spending the afternoon avoiding it. The warmer end of the range reaches 25.8°C or more, making shade a sensible option at midday. Evenings are mild on average, although cooler nights can fall to 17.8°C or below; a light layer is useful if you tend to feel chilly when sitting outside. Humidity averages 73%, so the air may feel humid despite the relatively moderate temperatures. Choose breathable clothes rather than packing only for the daytime high.

Long, sunny days with little rain to plan around

June is very dry, which makes it a sensible month for plans that depend on spending time outdoors. Rain is unlikely to be the main reason to change your day, though dry averages are not a promise of completely rain-free weather. Sunshine averages about 13.4 hours within 14.5 hours of daylight, leaving plenty of time to be outside without concentrating everything around midday. That long exposure matters even when the temperature feels comfortable: take sunscreen, sunglasses and a hat, and use shade for breaks. Heavy waterproof clothing is not a packing priority; light clothes and protection from the sun are more useful.

Swimming is realistic, but the water is not hot

The sea is warm enough for swimming in June, with an average temperature of 22.2°C. That makes a swim a reasonable part of your plans rather than something reserved for travellers who enjoy cold water. There is still a catch for anyone who likes very warm seas: the year-to-year range is 21°C to 23°C, so conditions can sit on the bracing side of comfortable. Pack swimwear, but let your own tolerance guide how long you stay in. June works well if you want swimming alongside warm outdoor days; it is less convincing if warm water is the deciding factor in your holiday.