Milos enjoys a classic Mediterranean climate. This means you can expect long, hot and dry summers followed by mild and wet winters. The warmest period falls between July and August, when average daytime temperatures regularly reach 28 degrees Celsius. The coolest period is from January to February, with daytime highs around 14 degrees Celsius.
During summer, the days are bright and clear. The island receives over 300 days of sunshine each year, making it a very sunny destination. Rainfall is rare in summer but much more common in December and January.
Wind is a very important part of the local climate. The strong northern wind, known as the Meltemi, blows frequently during July and August. Because the island has unique geology and boat tours are a major attraction, understanding the weather will help you plan your beach days and sailing trips safely.
Below you will find our complete guide to typical climate conditions on the island, followed by a live weather widget showing the current forecast.
Milos Weather at a Glance
The island experiences its hottest weather during August, though July is also extremely warm. The coolest temperatures occur in February. If you want to avoid rain, July and August are the driest months, often receiving zero rainfall. The rainiest time of year is December and January.
July is usually the sunniest month, offering up to 14 hours of daily sunshine. Wind speeds peak during July and August because of the Meltemi weather system, which brings strong northern gusts to the region. The main swimming season runs from June to October, when the sea is warm enough for most visitors to swim comfortably.
Here is a quick monthly guide to help you understand what to expect.
| Month | Typical conditions | What it is good for |
| January | Cold, wet and windy | Quiet coastal walks |
| February | Cool with frequent rain | Experiencing local village life |
| March | Mild with increasing sunshine | Early spring photography |
| April | Warm days and cool nights | Spring hiking and wild flowers |
| May | Sunny and comfortably warm | Early beach days and sightseeing |
| June | Hot and very sunny | Swimming and reliable boat trips |
| July | Very hot and often windy | Sunbathing and windsurfing |
| August | Peak heat and strong winds | Hot beach days on the south coast |
| September | Warm with calm seas | Perfect swimming and fewer crowds |
| October | Mild and occasionally cloudy | Late season swimming and hiking |
| November | Cooling down with some rain | Peaceful walking holidays |
| December | Cold and wet | Enjoying local winter traditions |
Milos Weather by Month
January
January is the coldest and wettest month. Average daytime temperatures sit around 13 degrees Celsius, while nights drop to 9 degrees Celsius. You can expect about 9 days of rain and only 4 hours of sunshine per day. The sea temperature is a chilly 16 degrees Celsius, which makes swimming unappealing for most people. The island is very quiet during this time, with most tourist businesses closed. It is a peaceful time for visitors who want to experience authentic local life, but it is not suitable for a typical beach holiday.
February
February remains cold and wet, sharing similar conditions with January. The average high temperature is 14 degrees Celsius, and nighttime lows stay near 9 degrees Celsius. Rainfall is slightly lower than in January, but you will still see about 7 rainy days. Sunshine increases slightly to 5 hours a day. The sea remains at its coldest, hovering around 15 degrees Celsius. The wind can feel quite sharp during coastal walks. Visitors in February come mostly for quiet relaxation and to enjoy the natural landscape without the summer heat.
March
March marks the beginning of spring. Temperatures begin to rise, reaching an average high of 16 degrees Celsius. Nights are still chilly at 10 degrees Celsius. The rain decreases to about 6 days across the month, and sunshine jumps to 6 hours daily. Wild flowers start blooming across the hillsides, making this a beautiful time for nature lovers. The sea is still too cold for swimming at 16 degrees Celsius. This is a brilliant month for hiking and exploring the ancient ruins before the intense summer heat arrives.
April
April brings noticeably warmer weather and longer days. Daytime highs reach 19 degrees Celsius, and the sun shines for about 8 hours a day. Rain becomes rare, with only 3 wet days expected on average. The sea temperature slowly rises to 17 degrees Celsius, though it still feels quite brisk for swimming. April is a fantastic time for outdoor activities, especially hiking and cycling, because the temperature is comfortable. The island starts preparing for the tourist season, so you will find more places opening up.
May
May is a wonderful time to visit. The weather becomes genuinely warm, with average highs of 23 degrees Celsius. You will enjoy 10 hours of sunshine a day, and rainfall drops to just 1 or 2 days. The sea warms up to 19 degrees Celsius, meaning brave swimmers can start enjoying the water. The landscape is still green from the winter rain. May offers excellent conditions for sightseeing and early beach days. The island is lively but not crowded, making it a very popular choice for travellers seeking a relaxed atmosphere.
June
June introduces hot summer weather. Average high temperatures reach 27 degrees Celsius, and rainfall is almost non existent. You can expect up to 13 hours of bright sunshine every single day. The sea temperature hits a very comfortable 22 degrees Celsius, which is perfect for swimming and water sports. The strong summer winds have usually not arrived yet, making June one of the most reliable months for booking boat tours to the famous sea caves. It is a busy month, but the weather is absolutely ideal for a beach holiday.
July
July is the hottest and driest month. Daytime temperatures average 28 degrees Celsius, but heatwaves can push the thermometer past 33 degrees Celsius. Rain is extremely rare. You will get 14 hours of glorious sunshine daily. The sea is a warm 24 degrees Celsius. However, July also brings the famous northern winds. These winds cool the air beautifully but can create choppy seas on the northern coast. You will need to choose your beaches carefully based on the wind direction. This is peak season, so the island is full of energy.
August
August shares the peak summer heat with July. Average highs remain at 28 degrees Celsius, and nighttime temperatures stay a warm 22 degrees Celsius. The sea reaches its warmest point at 25 degrees Celsius, making swimming feel like a warm bath. Like July, August is heavily affected by strong northern winds. While the breeze stops the island from feeling too humid, it can whip up sand on exposed beaches. August is the busiest month for tourism, and the lively weather perfectly matches the vibrant holiday atmosphere across the towns.
September
September is often considered the best month to visit. The intense heat softens, with average highs dropping to 25 degrees Celsius. The sea retains all its summer heat, staying at a beautiful 24 degrees Celsius. The strong northern winds usually calm down significantly, which creates perfect conditions for sailing and visiting sea caves. Sunshine remains high at 10 hours a day, and rain is still very rare. The weather is incredibly comfortable for both lounging by the water and exploring the volcanic landscapes on foot.
October
October offers mild and pleasant autumn weather. Daytime highs reach 21 degrees Celsius, which is very comfortable for walking and sightseeing. The sea stays surprisingly warm at 22 degrees Celsius, so swimming is still very popular during the first half of the month. Rain becomes slightly more frequent, with about 4 wet days expected. The evenings start to feel cooler, dropping to 16 degrees Celsius, so you will need a light jacket. October is a peaceful month, ideal for visitors who want mild weather and fewer crowds.
November
November sees a clear shift towards winter. Temperatures drop to an average high of 18 degrees Celsius, and nights become chilly at 13 degrees Celsius. Rainfall increases notably, with around 6 rainy days during the month. Sunshine drops to 5 hours a day. The sea cools to 20 degrees Celsius, marking the end of the swimming season for most people. Tourism slows down completely. This month appeals to travellers looking for a quiet retreat and those who enjoy dramatic, cloudy skies over the volcanic coastline.
December
December is one of the coldest and wettest months. The average high temperature is 14 degrees Celsius, while lows dip to 10 degrees Celsius. You can expect about 9 days of rain and only 4 hours of daylight sunshine. The sea temperature falls to 17 degrees Celsius. Strong winter winds can make the air feel much colder than the thermometer suggests. Very few tourists visit during this time, but the island has a rugged winter beauty. It is a time for indoor comforts and experiencing local Greek winter culture.
Wind and Meltemi
The Meltemi is a strong, dry northern wind that blows across the Aegean Sea during the summer. It is caused by high pressure over the Balkans meeting low pressure over the eastern Mediterranean. On this island, the Meltemi is a defining feature of the summer weather, particularly during July and August.
For visitors, the Meltemi brings both benefits and challenges. On a positive note, the wind provides natural air conditioning. It blows away humidity and keeps the intense summer heat feeling comfortable. A sunny day at 30 degrees Celsius feels much more pleasant with a fresh breeze. The wind also keeps the sky incredibly clear, offering brilliant visibility for photography.
However, the Meltemi can significantly affect your daily plans. The wind usually starts blowing in the morning, peaks in the mid afternoon, and calms down slightly after sunset. When it blows strongly, the northern beaches become very wavy. Famous spots on the north coast can experience large waves that make swimming difficult or even dangerous.
Because of this, wind direction matters immensely. When the northern Meltemi is blowing, you should head to the southern beaches. The southern coast is naturally sheltered by the island terrain, meaning the water there remains flat, calm and crystal clear even on the windiest days.
The wind also affects boat trips. The famous sea caves and coastal rock formations are major attractions, but they are located in open water. When the Meltemi is very strong, boat captains may change their routes for safety and comfort. Sometimes they will only sail along the sheltered southern coast. You should always check with your tour operator a day or two before your trip, as they monitor marine forecasts closely.
Ferry travel can also be impacted. While modern ferries are large and stable, extreme winds can occasionally cause delays or alterations to ferry schedules. It is wise to check official updates from your ferry operator if you are travelling during a particularly windy period. Overall, the wind is just a natural part of island life, and adapting to it is part of the experience.
Weather for Activities
Beach days
The best weather for a beach day is sunny and warm with gentle breezes. From June to September, the air temperature stays above 25 degrees Celsius, which is perfect for sunbathing. To enjoy a comfortable beach day, you must pay attention to the wind. On windy northern days, the southern beaches offer perfectly calm conditions. The sun is very strong in summer, so mornings and late afternoons are the most comfortable times to relax on the sand. Rain will almost never interrupt a summer beach day.
Swimming
The main swimming season runs from early June until late October. The sea temperature peaks in August at roughly 25 degrees Celsius. To enjoy swimming, you need calm water. The Mediterranean has very small tides, so currents are rarely an issue, but wind created waves can be strong. When the sea is calm, the water is exceptionally clear and perfect for snorkelling. September is arguably the best swimming month because the water retains its summer heat but the air is slightly cooler.
Hiking and walking
Hiking requires cooler weather to be safe and enjoyable. The island has beautiful volcanic trails, but there is very little natural shade. Therefore, the extreme heat of July and August makes daytime hiking very tiring and potentially dangerous due to UV exposure. The best hiking conditions are found in April, May, September and October. During these months, the air temperature sits comfortably between 18 and 23 degrees Celsius. If you must walk in summer, always go early in the morning before the sun reaches its peak.
Boat trips and sailing
Boat trips depend entirely on wind and sea conditions. The ideal weather for sailing is a sunny day with light winds. June and September usually offer the most reliable sea conditions for visiting the famous coastal caves. During July and August, the strong Meltemi winds can make the open sea very choppy. When this happens, sailing can be bumpy, and some open water routes might be restricted. Always check the latest marine forecast with your local boat operator, as they know exactly when it is safe to sail.
Sightseeing and photography
Exploring local villages and archaeological sites is most comfortable in the spring and autumn. Temperatures around 20 degrees Celsius mean you can climb the village steps without overheating. For photography, the summer Meltemi winds blow away any haze, leaving the sky a brilliant, clear blue. The golden hours of sunrise and sunset provide the most spectacular light for photographing the colourful fishing villages and white volcanic rocks, especially when the weather is calm and the sea acts like a mirror.
Best Time to Visit for Weather
The best time to visit depends entirely on what you want to do. The climate changes significantly throughout the year, so choosing the right month will make a huge difference to your holiday experience.
Best months for hot beach weather
If you want guaranteed sunshine and high temperatures, July and August are the best months. During this peak summer period, the thermometer regularly hits 28 degrees Celsius, and rain is almost impossible. The sun is intense, making it the perfect weather for lounging on the sand and getting a tan. You will need to manage the strong summer winds by choosing sheltered beaches, but the heat is absolutely reliable.
Best months for swimming
September is the ultimate month for swimming. By September, the sea has absorbed all the heat from the summer sun, reaching a lovely 24 degrees Celsius. At the same time, the strong northern winds usually calm down, meaning the sea surface is much flatter and safer for swimming and snorkelling. June is also excellent, offering calm waters and very warm air temperatures, though the sea is slightly cooler than in late summer.
Best months for hiking
For outdoor enthusiasts, April and May are spectacular. The daytime temperatures sit comfortably around 19 to 23 degrees Celsius, meaning you can hike the volcanic hills without suffering from heat exhaustion. The winter rains have finished, leaving the landscape green and covered in wild spring flowers. October is another excellent choice for walking, offering mild autumn temperatures and sea water that is still warm enough for a post hike swim.
Best months for sightseeing
May and October provide the most comfortable weather for exploring the island history and architecture. Walking through the narrow, steep streets of the capital village is much more enjoyable when the temperature is a mild 21 degrees Celsius rather than a blistering 30 degrees Celsius. The lighting during these months is also softer, which is fantastic for taking photographs of the traditional white houses and colourful wooden doors.
Best months for fewer crowds and milder weather
If you dislike extreme heat and busy tourist spots, late May and late September are perfect. The weather is completely cooperative, offering warm days and cool, comfortable evenings. You can enjoy all the summer activities without the peak season crowds. The restaurants are relaxed, the beaches have plenty of space, and the weather is generally very stable, providing a perfect balance of warmth and tranquility.
How hot does it get in summer?
During July and August, average daytime temperatures sit around 28 degrees Celsius. However, during occasional heatwaves, the temperature can easily exceed 33 degrees Celsius. The strong northern winds usually help the air feel slightly cooler and less humid.
Is the sea warm enough for swimming in May?
In May, the sea temperature averages 19 degrees Celsius. This is refreshing and perfectly fine for a quick dip, but it might feel a bit chilly for long swimming sessions. The water warms up significantly by the end of June.
Do boat tours get cancelled because of the wind?
Yes, boat tours can be altered or cancelled when the northern Meltemi winds are very strong, usually in July or August. Captains prioritise safety and passenger comfort. They will often reroute the trip to the sheltered southern coast if the open sea is too rough.
Does it rain in the summer?
Summer rain is incredibly rare. June, July and August usually see zero rainfall. You can confidently leave your umbrella at home if you are travelling during the peak summer months.
Are there mosquitoes on the island?
Yes, mosquitoes can certainly be present, especially on very warm evenings when there is little to 0 wind blowing. It is highly recommended to pack a good quality insect repellent if you are planning on dining outdoors or keeping your hotel windows open at night. Many local supermarkets sell plug in mosquito repellents for your room which work incredibly well.
Do I need air conditioning in my hotel?
If you are travelling between June and September, air conditioning is absolutely essential. The nights stay very warm, often lingering around 23 degrees Celsius, and you will struggle to sleep comfortably without a cool room. During the much cooler spring and autumn months, you can usually sleep perfectly well by simply leaving a window open to let the fresh sea breeze inside.
