Weather in Santorini 🇬🇷
Monthly weather averages & travel planning
April
Avg Temp
17°C
Rain Days
4 days
Sun Hours
12 hrs
Humidity
65%
Europe › 🇬🇷 Greece › Santorini
Updated: March 2026
Is April a Good Time to Visit Santorini?
8/10
Excellent
April is a excellent time to visit Santorini (8/10). With 12 daily sunshine hours and only 4 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 5th sunniest of the year in Santorini. Beach and outdoor-focused visitors will find April ideal, though hotel prices reflect demand and popular sites get crowded by mid-morning. March offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Santorini's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: book accommodation at least 6-8 weeks ahead, as popular hotels fill quickly during April. Purchasing skip-the-line tickets for major attractions in advance saves meaningful time. If you have flexibility, arriving a few days before or after peak weekends reduces both crowds and prices noticeably.
vs March:15°C avg high
The single most important thing to know about visiting Santorini in April: conditions are genuinely cooperative, with 17°C highs and only 4 wet days making this one of the more straightforward months to plan around. Precipitation totals 16mm for the month, spread across roughly 4 days, and 12 sunshine hours per day give you a reliable window for outdoor plans.
17°C
63°F
Avg High
14°C
57°F
Avg Low
4 days
16 mm total
Rain Days
12h
per day avg
Sunshine
65%
Moderate
Humidity
Temperature in Santorini in April
The narrow 3°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Average wind speeds of 31 km/h add a meaningful windchill factor, making the 17°C temperature feel cooler than it reads. In Fahrenheit: 63°F average high, 57°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Santorini in April
Morning14°CBefore the day warms up
Afternoon17°CPeak daytime temperature
Evening17°CAfter sunset cools down
Packing for Santorini in April means dressing for 17°C days and 14°C evenings. A mid-weight jacket over a sweater handles 17°C daytime temperatures; the combination stays comfortable all day without overheating. Evening temperatures settle at 14°C, a modest 3°C drop that a light cardigan or denim jacket covers. European cobblestones reward low-profile walking shoes over flip-flops or heels, with cushioned trainers or leather walking shoes being the practical choice.
Local tip: Many of Santorini's museums and galleries maintain cool interior temperatures regardless of outdoor conditions. A compact layer in your daypack lets you move between warm streets and chilled exhibition halls without discomfort.
Events in Santorini in April
April has no major festivals or public holidays in Santorini, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Santorini in April
Based on 17°C average highs and 4 rainy days
- Light jacket or cardigan for cooler evenings
- Mix of short and long-sleeve layers
- Comfortable walking shoes with good arch support
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Santorini in April
- Explore the old town's cobblestone backstreetsMorning (9-11am)At 17°C, conditions are pleasant for unhurried exploration on foot
- Visit hilltop viewpoints for panoramic city viewsLate afternoon (4-6pm)Low sun angle creates dramatic light for photography while temperatures remain comfortable
- Bicycle rental for a half-day city circuitMid-morning startMild 17°C temperatures are ideal for extended cycling without excessive effort
- Boat tour of the river, bay, or canal networkLate morning departureComfortable weather makes open-deck boats viable without wind-chill concerns
- Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
- Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
- Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningApril brings distinct seasonal changes to public green spaces worth exploring
- Try the seasonal farmer's market for local produce and street foodSaturday morning markets typically 8am-1pmApril seasonal produce is at peak availability, offering dishes not found at other times of year
Why is Santorini mild in April?
April marks the transition into warmer conditions in Santorini, as the sun angle climbs and day length extends. Temperatures averaging 17°C by day and 14°C overnight reflect a city shaking off winter: the morning air still carries a cool edge, but afternoons are noticeably warmer than even four weeks prior. At 36 degrees north latitude, spring is one of the most dynamic periods in the annual cycle, with weekly temperature changes that can be larger than the month-to-month shifts of summer. This volatility is part of the appeal: Santorini in April has a freshness and energy that peak-summer heat tends to mute. Layers remain essential, but there are reliable pockets of warmth that reward patience. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Santorini in April
In April, Santorini experiences average highs of 17°C (63°F) and lows of 14°C (57°F). Expect around 4 rainy days and 12 hours of sunshine per day, with humidity averaging 65%. The 3°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 6, so sun protection is advisable on clear days.
Santorini typically sees 4 rainy days in April, with total precipitation of around 16mm. This makes April one of the drier months of the year, and a reliable window for outdoor sightseeing and day trips. Rain showers tend to be brief when they do occur. For context, the driest month in Santorini typically sees 4-6 fewer rain days than April.
Pack a warm jacket, sweaters, and layering pieces for Santorini in April. Temperatures can drop to 14°C at night, so thermal underlayers are advisable for evening outings. Waterproof footwear is a sensible precaution even though rain days are limited. A scarf, hat, and gloves handle the windchill on clear cold days, which often feel colder than the thermometer reads.
Yes, April is an excellent time to visit Santorini. With 12 daily sunshine hours and only 4 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 17°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.
The average high temperature in Santorini in April is 17°C (63°F), and the average low is 14°C (57°F). The mean daily temperature is approximately 16°C (60°F). The day-to-night range of 3°C is narrow, typical of coastal or maritime cities. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Santorini is generally June. June offers the most sunshine at 14 hours per day and only 1 rainy days. Average temperatures reach 24°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around June gives you the best chance of dry, bright weather.
April is shoulder or low season in Santorini, meaning fewer tourists and generally lower prices than peak months. With 12 sunshine hours and 4 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In April, Santorini suits a range of activities thanks to cool conditions around 17°C. With few rainy days, outdoor activities are highly recommended. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 12 hours of sunshine, parks and waterfront walks are particularly enjoyable.
April ranks 5th sunniest of the year in Santorini, with an average 12 daily sunshine hours. The driest months are July, August, and June. August is the hottest month (27°C avg high); January is the coolest (13°C). From here, temperatures rise 4°C into May. Compared to last month (March: 15°C high, 7 rain days), April is warmer and drier. April sits in the middle of the annual sunshine ranking for Santorini, offering a reasonable balance of good weather and manageable crowds.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 13°C | 11°C | 10 | 8h | View |
| February | 14°C | 11°C | 9 | 9h | View |
| March | 15°C | 12°C | 7 | 10h | View |
| April | 17°C | 14°C | 4 | 12h | View |
| May | 21°C | 17°C | 2 | 13h | View |
| June | 24°C | 21°C | 1 | 14h | View |
| July | 26°C | 23°C | 0 | 13h | View |
| August | 27°C | 24°C | 0 | 13h | View |
| September | 25°C | 22°C | 1 | 12h | View |
| October | 22°C | 18°C | 4 | 10h | View |
| November | 18°C | 15°C | 6 | 9h | View |
| December | 15°C | 12°C | 9 | 8h | View |
January
10 rain days, 8h sun
13°11°
February
9 rain days, 9h sun
14°11°
March
7 rain days, 10h sun
15°12°
April
4 rain days, 12h sun
17°14°
May
2 rain days, 13h sun
21°17°
June
1 rain days, 14h sun
24°21°
July
0 rain days, 13h sun
26°23°
August
0 rain days, 13h sun
27°24°
September
1 rain days, 12h sun
25°22°
October
4 rain days, 10h sun
22°18°
November
6 rain days, 9h sun
18°15°
December
9 rain days, 8h sun
15°12°
Other Months in Santorini
Plan Your Trip to Santorini
Nearby Destinations
Cities within 500 km with comparable weather conditions
Data Sources for Santorini
Climate normals represent 30-year averages (1991-2020). Individual years may vary.