Your May weather guide
WarmWeather in Halkidiki in May
May is a good choice for Halkidiki if you want warm days rather than strong summer heat, but it is less convincing for a holiday built around swimming. Average daytime highs are around 21°C, with nights near 16°C, so light clothes need a warmer layer alongside them. The sea averages 18.6°C and feels bracing. Go for comfortable time outdoors and some sunshine, while leaving room for rain and cooler evenings.
Long-term climate averages for Nea Moudania, not a forecast · 1991-2020
Halkidiki, month by month
Your snapshot
At a glance
The useful details for Nea Moudania.
- Average daytime high
- 21.3°C
- 9 in 10 days stay below 25°C
- Average night-time low
- 15.8°C
- coldest 10% of nights: 13°C or lower
- Compared with London
- +4.7°C
- London averages 16.6°C in May
- Sea temperature
- 18.6°C
- year to year: 17°C to 20°C
- Sunshine per day (est.)
- 8.3h
- 58% of 14.2 h of daylight
- Rainy days (1 mm+)
- 7
- 49 mm over the month
- Humidity
- 72%
- Days over 25°C
- 13%
- 0% over 30°C
- Record high 1991-2020
- 31.9°C
- 1994-05-25
- Record low 1991-2020
- 8.8°C
- 2011-05-07
- Flight from London
- ≈ 3 h 30 min
- 2174 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How May compares
May is the 5th warmest month of the year in Halkidiki and ranks 98th of 134 destinations we compare for May - see where else is hot in May. Within Greece it is 23rd of 44 (Greece in May). Against London's average high of 16.6°C in May, Halkidiki is 4.7°C warmer by day and 7.5°C warmer at night.
Daytime and night-time in May
The typical May day in Halkidiki peaks at 21.3°C, but that is an average: the warmest 10% of days reach 24.7°C or more. Roughly 1 in 8 days top 25°C and 1 in 333 pass 30°C. Nights average 15.8°C; one night in ten drops to 13.0°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest May day here reached 31.9°C (1994-05-25) and the coldest night 8.8°C (2011-05-07).
Rain in May
Some rain (4-8 rainy days): about 7 days with 1 mm or more, 49 mm in total. Year to year it varies a lot - the wettest May was 2018 with 114 mm, the driest 2002 with 8 mm. Humidity averages 72%.
Sea temperature in May
The sea averages 18.6°C - bracing (18-22°c). Depending on the year it ranges from 17.3°C to 19.7°C. For the warmest sea here, come in August (26.7°C).
Sunshine and daylight
Around 8.3 hours of sunshine a day (estimated from cloud cover), 14.2 hours of daylight: the sun rises about 06:11 and sets about 20:36 local time in mid-May. Average cloud cover is 42%.
Is May a good time to visit Halkidiki?
It is a reasonable choice: warm days. The best months for Halkidiki on our scoring are August, July, June; months averaging 25°C or more: Jun, Jul, Aug.
Comfortable warmth, but a cool sea
The warmth suits travellers who prefer being outside without intense heat. Only 13% of days reach 25°C, so do not plan on hot beach weather throughout your stay. On warmer afternoons, light clothing should be comfortable, though a jumper or light jacket makes sense once the sun goes down. The colder nights can fall to 13°C or below, making an extra layer useful for sitting outdoors. Swimming is the bigger compromise: the sea varies from 17°C to 20°C between years, so even a warmer May is unlikely to feel comfortably warm in the water. Pack swimwear, but treat a dip as an option rather than the focus of the trip.
Plenty of daylight, with room for rain
May offers about 8.3 hours of sunshine within 14.2 hours of daylight, giving you a generous window for outdoor plans without promising clear skies throughout. Expect about 7 rainy days during the month, so a light waterproof is more useful than packing solely for dry weather. Keep your plans flexible enough to move time outdoors towards brighter spells rather than relying on every afternoon being suitable for the beach. Sunscreen and sunglasses still belong in your bag, and shade is sensible around midday when it feels warmer. The balance suits a varied holiday better than one dependent on uninterrupted sunshine.
A little perspective
Halkidiki through the year
May is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 10.1°C | 5.7°C | 14.1°C | 4.2 | 56 | 8 | 0% |
| February | 11.0°C | 6.3°C | 13.5°C | 4.7 | 52 | 8 | 0% |
| March | 13.2°C | 8.1°C | 13.5°C | 5.8 | 58 | 9 | 0% |
| April | 16.5°C | 11.2°C | 14.6°C | 6.9 | 45 | 7 | 1% |
| MaySelected | 21.3°C | 15.8°C | 18.6°C | 8.3 | 49 | 7 | 13% |
| Junebest | 25.9°C | 20.5°C | 23.2°C | 10.7 | 29 | 5 | 58% |
| Julybest | 28.3°C | 23.0°C | 25.9°C | 12.0 | 36 | 5 | 95% |
| Augustbest | 28.6°C | 23.4°C | 26.7°C | 11.3 | 32 | 4 | 94% |
| September | 24.5°C | 19.7°C | 24.5°C | 8.3 | 46 | 6 | 42% |
| October | 20.0°C | 15.5°C | 21.3°C | 5.4 | 56 | 8 | 5% |
| November | 15.4°C | 11.3°C | 18.0°C | 4.0 | 57 | 8 | 0% |
| December | 11.4°C | 7.4°C | 15.5°C | 3.7 | 79 | 9 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in May
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
Halkidiki in May FAQs
Plain answers, grounded in the averages.
Is Halkidiki hot in May?
Halkidiki is warm in May: the average daytime high is 21.3°C and nights average 15.8°C. Roughly 1 in 8 May days reach 25°C.
Can you swim in the sea in Halkidiki in May?
The sea around Halkidiki averages 18.6°C in May, which is bracing - fine for a quick dip, cool for long swims. Between 1991 and 2020 it ranged from 17°C to 20°C depending on the year.
How much does it rain in Halkidiki in May?
Halkidiki sees about 7 rainy days (1 mm or more) and 49 mm of rain in a typical May. The wettest May between 1991 and 2020 was 2018 (114 mm) and the driest was 2002 (8 mm).
How sunny is Halkidiki in May?
Halkidiki gets around 8.3 hours of sunshine a day in May out of 14.2 hours of daylight (estimated from average cloud cover).
How does Halkidiki compare with the UK in May?
Halkidiki is on average 4.7°C warmer than London by day in May (21.3°C against 16.6°C).
What is the hottest May on record in Halkidiki?
Between 1991 and 2020 the hottest May day in Halkidiki reached 31.9°C on 1994-05-25, and the coldest night dropped to 8.8°C on 2011-05-07.
How much warmer is Halkidiki than London in May?
Halkidiki's average daytime high is 21.3°C, compared with 16.6°C in London, a difference of 4.7°C. That is a noticeable step up in warmth, but not a guarantee of hot weather. You should still pack layers for evenings.
Would a summer month be better for a warmer holiday?
Yes, if warmth is your priority, June, July or August are better choices than May. May suits travellers who prefer gentler daytime temperatures and can accept a bracing sea, some rain and the need for an evening layer.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Néa Moudhaniá (Nea Moudania). Sea temperature from the nearest 5 km sea cell, 3 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C