Destination guide
Sani weather by month
June to August is the best time for warm-weather holidays in Sani, while September suits travellers who prefer less heat without giving up comfortable swimming. June averages 25°C by day, August reaches 28°C, and September's sea stays at 24°C. The catch is that spring sunshine arrives before the water warms up, while autumn brings more rain. Winter is better suited to time outdoors in layers than to a beach-focused stay.
- Hottest month
- 27.7°CAugust
- Coolest month
- 10.3°CJanuary
- Warmest sea
- 26.7°CAugust
- Flight from London
- 3 h 30 minShort-haul (up to 4.5 h) · estimated
Sani, month by month
Month-by-month detail pages exist for our most searched destinations; for Sani the 12-month table below carries the full picture.
A little perspective
Sani through the year
Every month at a glance; "best" marks our three top months on warmth, dryness and sunshine.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 10.3°C | 6.8°C | 14.1°C | 4.2 | 56 | 8 | 0% |
| February | 10.9°C | 7.3°C | 13.5°C | 4.7 | 52 | 8 | 0% |
| March | 12.8°C | 8.9°C | 13.5°C | 5.8 | 58 | 9 | 0% |
| April | 15.8°C | 11.8°C | 14.6°C | 6.9 | 45 | 7 | 0% |
| May | 20.3°C | 16.2°C | 18.6°C | 8.3 | 48 | 7 | 3% |
| Junebest | 24.9°C | 20.8°C | 23.2°C | 10.7 | 28 | 5 | 47% |
| Julybest | 27.4°C | 23.4°C | 25.9°C | 12.0 | 36 | 5 | 93% |
| Augustbest | 27.7°C | 23.9°C | 26.7°C | 11.3 | 31 | 4 | 93% |
| September | 24.0°C | 20.3°C | 24.5°C | 8.3 | 47 | 6 | 34% |
| October | 19.8°C | 16.2°C | 21.3°C | 5.4 | 56 | 8 | 2% |
| November | 15.4°C | 12.1°C | 18.0°C | 4.0 | 57 | 8 | 0% |
| December | 11.7°C | 8.4°C | 15.5°C | 3.7 | 80 | 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.
When to go to Sani
For beach weather, look at months where the daytime average clears 25°C and rainy days stay low: July, August. December is the wettest month (80 mm, about 9 rainy days) and June the driest (28 mm). The sea is warmest in August at 26.7°C and coolest in February at 13.5°C.
Getting there
A direct flight from London Gatwick to Thessaloniki Macedonia International Airport (SKG, 64 km from Kassándreia) takes roughly 3 h 30 min - short-haul (up to 4.5 h) by UK standards. Time-zone: Europe/Athens.
Records and extremes, 1991-2020
The hottest day recorded in Sani between 1991 and 2020 reached 36.6°C on 30 June 2017; the coldest fell to -3.8°C on 8 January 2017. In August one day in ten tops 30.0°C and about 10% of days pass 30°C; in January one night in ten drops to 2.9°C or below. The wettest single month of the period was December 2002 with 239 mm, against a December average of 80 mm.
Sunrise, sunset and daylight in Sani
Local time on the 15th of each month; daylight-saving rules as of 2020.
| Month (15th) | Sunrise | Sunset | Daylight | Sunshine/day |
|---|---|---|---|---|
| January | 07:47 | 17:24 | 9.6 h | 4.2 h |
| February | 07:20 | 18:01 | 10.7 h | 4.7 h |
| March | 06:38 | 18:33 | 11.9 h | 5.8 h |
| April | 06:48 | 20:04 | 13.3 h | 6.9 h |
| May | 06:11 | 20:35 | 14.4 h | 8.3 h |
| June | 05:57 | 20:57 | 15.0 h | 10.7 h |
| July | 06:10 | 20:55 | 14.7 h | 12.0 h |
| August | 06:38 | 20:24 | 13.8 h | 11.3 h |
| September | 07:07 | 19:36 | 12.5 h | 8.3 h |
| October | 07:37 | 18:47 | 11.2 h | 5.4 h |
| November | 07:12 | 17:10 | 10.0 h | 4.0 h |
| December | 07:41 | 17:02 | 9.3 h | 3.7 h |
Spring: comfortable outdoors, but the sea takes longer
March is still cool rather than beach-warm, with daytime averages of 13°C and a sea that calls for enthusiasm rather than casual swimming. April feels milder at 16°C, making it a reasonable choice for spending time outdoors without summer heat, though a jacket remains useful. May is the stronger spring option for warmth: days average 20°C and evenings are gentler, but the sea averages 19°C, so swimming comfort depends on your tolerance. Rain remains a consideration throughout spring. Pack layers and a light waterproof, and choose May for relaxed outdoor days rather than expecting reliably warm water.
Summer: the strongest choice for swimming and sunshine
June brings a clear step up in warmth, with a 23°C sea and long sunny stretches that make a swimming-focused holiday more appealing. July offers the most sunshine, averaging 12 hours a day, while August has the warmest days and water. Its sea averages 27°C, making it the easiest choice if chilly swimming puts you off. The trade-off is stronger midday warmth and warm nights: August nights average 24°C, so check that your room has cooling. Bring light clothing and sun protection, and leave more active outdoor plans for earlier or later in the day. Rain is less frequent, not absent.
Autumn and winter: lingering sea warmth, then cooler days
September is the best autumn compromise for swimming and comfortable days, with both air and sea averaging 24°C. October still offers daytime averages of 20°C and water at 21°C, but more frequent rain and less sunshine make flexible plans sensible. November drops to 15°C by day, shifting the emphasis towards being outdoors in layers rather than lingering in swimwear. December is the wettest month, so waterproof clothing becomes more important. January is the coolest, averaging 10°C by day, while February edges up to 11°C without much improvement in swimming conditions. Winter nights feel chilly, and sunshine is limited compared with summer. Choose this part of the year only if a warm sea and dependable beach weather are not central to your holiday.
A little more detail
Sani weather FAQs
Plain answers, grounded in the averages.
What is the best time to visit Sani?
Judged on warmth, low rainfall and sunshine, the best months in Sani are August, June and July. August is the hottest month (average high 27.7°C) and January the coolest (10.3°C).
How many months a year is Sani over 25°C?
2 months in Sani average a daytime high of 25°C or more, and 5 average 20°C or more.
When is the rainy season in Sani?
December is the wettest month in Sani (80 mm on average) and June the driest (28 mm). Annual rainfall averages 594 mm.
What is the hottest temperature recorded in Sani?
The hottest day recorded in Sani between 1991 and 2020 reached 36.6°C on 30 June 2017; the coldest fell to -3.8°C on 8 January 2017. Records come from daily data for 1991-2020, not from a single station's all-time history.
Is May or October better for swimming in Sani?
October has the warmer sea, averaging 21°C compared with May's 19°C. Both months average 20°C by day, but May has more sunshine and fewer rainy days. Choose October for water warmth, or May for brighter outdoor weather.
Will I need a jacket in the evenings?
Pack a jacket for spring, autumn and winter. April nights average 12°C, while May and October average 16°C, so an extra layer is useful after dark. Summer evenings are much warmer, with night-time averages reaching 24°C in August.
Does it rain during summer?
Yes, summer is not rain-free. June and July each average 5 rainy days, while August averages 4. You can reasonably prioritise outdoor plans, but keep some flexibility rather than assuming every day will stay dry.
See also: Greece weather by month · where else is hot in August
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 Kassándreia (Kassandreia (nearest town)). Sea temperature from the nearest 5 km sea cell, 3.1 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