AI-generatedSymi at a glance
- Best time
- Jun – Oct
- Warmest month
- Aug · 30°
- Warmest sea
- Aug · 26.2°
- Sunshine a year
- 2,930 h
- Rain a year
- 544 mm
- Climate
- Mediterranean
- Time zone
- UTC+2 / UTC+3
- Elevation
- 4 m
Climate in Symi
Symi has a Mediterranean climate with warm to hot, dry summers and mild, wetter winters. August is the warmest month with average highs of 30 °C, while January is the coolest at 15 °C. With around 2,930 hours of sunshine a year, Symi is sunny; June is the sunniest month with 11.0 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Excellent
Best time to visit: June – October
Good forBeach & swimmingSightseeing & walks
A typical day in October
- Morning, 08:00: about 21°
- Midday, 13:00: about 23°
- Afternoon, 16:00: about 23°
- Evening, 20:00: about 22°
- Night, 23:00: about 21°
07:1518:34
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:59–07:50 · evening 17:59–18:50
- Blue hour
- Morning 06:49–06:59 · evening 18:50–19:00
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Symi in October?
In October, Symi is warm: daytime highs average 24 °C, and even at night it stays warm at around 20 °C. The sea averages 23.6 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is rare: about 5 days bring 36 mm in total. All in all, October is an excellent month for a holiday in Symi.
More details for October
- Daylight
- 11 h 19 min07:15 – 18:34
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 7 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 24 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+3Europe/Athens
How the score comes together
- Temperatureweight 35 %77 %
- Seaweight 25 %94 %
- Sunshineweight 20 %78 %
- Few rainy daysweight 20 %96 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
Sea temperature in Symi
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 22.5 – 24.5 °C
Swimming season: Jun – Nov
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Symi ranges from 17.1 °C in February to 26.2 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to November.
From November to March the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 25.5 and 26.9 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 18.0° | 17.2° | 18.9° | fresh |
| FebruaryFeb | 17.1° | 16.3° | 17.8° | fresh |
| MarchMar | 17.1° | 16.5° | 17.6° | fresh |
| AprilApr | 17.7° | 17.1° | 18.3° | fresh |
| MayMay | 19.7° | 18.9° | 20.3° | fresh |
| JuneJun | 22.3° | 21.5° | 23.3° | refreshing |
| JulyJul | 24.6° | 23.7° | 25.5° | pleasant |
| AugustAug | 26.2° | 25.5° | 26.9° | warm |
| SeptemberSep | 25.5° | 24.9° | 26.3° | pleasant |
| OctoberOct | 23.6° | 22.5° | 24.5° | pleasant |
| NovemberNov | 21.6° | 20.8° | 22.5° | refreshing |
| DecemberDec | 19.6° | 18.9° | 20.4° | fresh |
Sunshine hours in Symi
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 7.7 of 11.3 hours of daylight in Symi, 68 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Symi
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 5 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 10).
Minutes until sunburn in October
- Very fair skin
- about 30 min
- Fair skin
- about 35 min
- Light brown skin
- about 50 min
- Olive skin
- about 60 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Symi: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Symi has about 5 rainy days with 36 mm of rain in total.
Wind and clouds in Symi
How breezy and how cloudy Symi is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Symi typically peaks at 20 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting, and here it gets there all year.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 24 % of the sky over Symi: mostly sunny, with about 7.7 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Symi
How often the day gets hot in Symi (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Symi has about 0 hot days, with an average daytime high of 24 °C: some hot or muggy days. Single hot or muggy days are possible; a hat and water bottle are enough.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Symi
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- Hot 24° and more
- muggy month (10+ muggy days)
WarmOctober: nights around 20°. Tropical nights: a fan or air conditioning helps. Muggy on about 7 days (dew point 18 °C or more).
The coolest nights are in February (12°), the warmest in August (26°). Tropical nights of 20 °C and more are the rule from June to October; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) from April to May and in November. It is muggy (dew point 18 °C or more) on about 108 days a year, mostly from June to September.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 18 | 15° | 12° | 18.0° | 4.9 h | 13 | 118 |
| FebruaryFeb | 21 | 15° | 12° | 17.1° | 5.6 h | 10 | 81 |
| MarchMar | 29 | 16° | 13° | 17.1° | 7.0 h | 7 | 54 |
| AprilApr | 39 | 19° | 15° | 17.7° | 8.4 h | 5 | 28 |
| MayMay | 70 | 23° | 18° | 19.7° | 9.5 h | 3 | 13 |
| JuneJun | 94 | 26° | 22° | 22.3° | 11.0 h | 0 | 2 |
| JulyJul | 100 | 29° | 25° | 24.6° | 11.0 h | 0 | 0 |
| AugustAug | 100 | 30° | 26° | 26.2° | 10.8 h | 0 | 0 |
| SeptemberSep | 100 | 27° | 24° | 25.5° | 9.5 h | 1 | 10 |
| OctoberOct | 85 | 24° | 20° | 23.6° | 7.7 h | 5 | 36 |
| NovemberNov | 46 | 20° | 17° | 21.6° | 6.0 h | 8 | 75 |
| DecemberDec | 23 | 16° | 14° | 19.6° | 4.6 h | 12 | 127 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
36.62° N, 27.84° E · 4 m · Europe/Athens
Best time to visit Symi
The best time to visit Symi is from June to October. For a beach holiday with the sea above 21 °C, go from June to October. For sightseeing, day trips and hiking, conditions are most comfortable from March to June and from September to November. Rain is most frequent from December to January; the wettest month is December with 127 mm.
Symi through the seasons
How the weather changes over the seasons, with averages for each.
Symi in spring
Mar – May
Fair
- 16–23 °C by day
- Sea 18 °C
- 8 h of sun a day
- 15 rainy days in all
Symi in summer
Jun – Aug
Excellent
- 26–30 °C by day
- Sea 24 °C
- 11 h of sun a day
- 1 rainy days in all
Symi in autumn
Sep – Nov
Good
- 20–27 °C by day
- Sea 24 °C
- 8 h of sun a day
- 14 rainy days in all
Symi in winter
Dec – Feb
Poor
- 15–16 °C by day
- Sea 18 °C
- 5 h of sun a day
- 35 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Symi for you.
Your best months: July – September
Based on the climate averages; tap a month to see its details.
Compare two months in Symi
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
July has the better holiday weather in Symi: score 100 against 85. In July, days are 5 °C warmer than in October. The sea is 1 °C warmer in July. July has 5 fewer rainy days. The sun shines 3 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Weather score | 85 | 100better |
| Day high | 24° | 29° |
| Night low | 20° | 25° |
| Sea | 23.6° | 24.6° |
| Sunshine | 7.7 h | 11.0 hbetter |
| Rainy days | 5 | 0better |
| Rainfall | 36 mm | 0 mmbetter |
| Muggy days | 7better | 29 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Jun – Oct
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Mar – Jun, Sep – Nov
15–28 °C and not too much rain
Rainy months
Dec – Jan
12 or more rainy days
Symi month by month
The typical weather for every month at a glance.
18January15° · Sea 18° · 5 h
In January, Symi is cool: daytime highs average 15 °C, and nights cool down to about 12 °C. The sea averages 18.0 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 118 mm in total. All in all, January is not an ideal month for a holiday in Symi.
Symi in January21February15° · Sea 17° · 6 h
In February, Symi is cool: daytime highs average 15 °C, and nights cool down to about 12 °C. The sea averages 17.1 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 81 mm in total. All in all, February is not an ideal month for a holiday in Symi.
Symi in February29March16° · Sea 17° · 7 h
In March, Symi is mild: daytime highs average 16 °C, and nights cool down to about 13 °C. The sea averages 17.1 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 7 hours a day. Rain falls on about 7 days, adding up to 54 mm. All in all, March is not an ideal month for a holiday in Symi.
Symi in March39April19° · Sea 18° · 8 h
In April, Symi is mild: daytime highs average 19 °C, and nights cool down to about 15 °C. The sea averages 17.7 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 8 hours a day. Rain falls on about 5 days, adding up to 28 mm. All in all, April is not an ideal month for a holiday in Symi.
Symi in April70May23° · Sea 20° · 10 h
In May, Symi is warm: daytime highs average 23 °C, and nights cool down to about 18 °C. The sea averages 19.7 °C – bracing, so a wetsuit helps for longer swims. With around 10 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 13 mm in total. All in all, May is a good month for a holiday in Symi.
Symi in May94June26° · Sea 22° · 11 h
In June, Symi is warm: daytime highs average 26 °C, and even at night it stays warm at around 22 °C. The sea averages 22.3 °C – refreshing for a swim. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The air is often humid and muggy. All in all, June is an excellent month for a holiday in Symi.
Symi in June100July29° · Sea 25° · 11 h
In July, Symi is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °C. The sea averages 24.6 °C – pleasant for swimming. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 7 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is an excellent month for a holiday in Symi.
Symi in July100August30° · Sea 26° · 11 h
In August, Symi is hot: daytime highs average 30 °C, and even at night it stays warm at around 26 °C. The sea averages 26.2 °C – lovely and warm for swimming. With around 11 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 11 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is an excellent month for a holiday in Symi.
Symi in August100September27° · Sea 26° · 10 h
In September, Symi is hot: daytime highs average 27 °C, and even at night it stays warm at around 24 °C. The sea averages 25.5 °C – pleasant for swimming. With around 10 hours of sunshine a day, there is plenty of sun. It hardly ever rains. The air is often humid and muggy. All in all, September is an excellent month for a holiday in Symi.
Symi in September85October24° · Sea 24° · 8 h
In October, Symi is warm: daytime highs average 24 °C, and even at night it stays warm at around 20 °C. The sea averages 23.6 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is rare: about 5 days bring 36 mm in total. All in all, October is an excellent month for a holiday in Symi.
Symi in October46November20° · Sea 22° · 6 h
In November, Symi is mild: daytime highs average 20 °C, and nights cool down to about 17 °C. The sea averages 21.6 °C – refreshing for a swim. Expect around 6 hours of sunshine a day. Rain falls on about 8 days, adding up to 75 mm. All in all, November is a so-so month for a holiday in Symi.
Symi in November23December16° · Sea 20° · 5 h
In December, Symi is mild: daytime highs average 16 °C, and nights cool down to about 14 °C. The sea averages 19.6 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 127 mm in total. All in all, December is not an ideal month for a holiday in Symi.
Symi in DecemberSymi compared
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Symi vs. Rhodes Town
In October the holiday weather in Symi and Rhodes Town is about equally good (score 85 vs. 83). During the day Rhodes Town is 1 °C cooler than Symi. The sea is about equally warm.
| in October | Symi | Rhodes Town |
|---|---|---|
| Holiday score | 85 | 83 |
| Daytime high | 24° | 23° |
| Sea | 24° | 24° |
| Sunshine | 8 h | 8 h |
| Rainy days | 5 | 5 |
| Best time | Jun – Oct | Jun – Sep |
Through the year
Greece in October: the best places
In October, Symi ranks 4 among the 31 nearest destinations in this country.
- Kastellorizo25°25°93
- 2Athens23°23°91
- 3Piraeus23°23°91
- 4SymiThis page24°24°85
- 5Lindos23°24°85
- 6Rhodes Town23°24°83
- 7Agios Nikolaos24°23°83
- 8Malia24°23°83
Planning a trip to Symi
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Symi in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Symi has its best school-holiday weather during the summer holidays (score 100) and its weakest during the Christmas holidays (score 21).
- 36
Easter holidays
Mar – Apr
Poor
- 18 °C by day
- Sea 18 °C
- 8.0 h of sun a day
- 6 rainy days a month
Good for: Sightseeing & walks
- 75
May half-term
May – Jun
Good
- 23 °C by day
- Sea 20 °C
- 9.8 h of sun a day
- 2 rainy days a month
Good for: Sightseeing & walks
- 100
Summer holidays
Jul – Aug
ExcellentBest holidays
- 29 °C by day
- Sea 26 °C
- 10.9 h of sun a day
- 0 rainy days a month
Good for: Beach & swimming
- 85
October half-term
Oct
Excellent
- 24 °C by day
- Sea 24 °C
- 7.7 h of sun a day
- 5 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
- 21
Christmas holidays
Dec – Jan
Poor
- 15 °C by day
- Sea 19 °C
- 4.8 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 3 h 50 min
- Distance
- 2,770 km
- Time zone
- UTC+3
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Symi
When is the best time to visit Symi?
The best time to visit Symi is from June to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Symi?
The sea temperature in Symi ranges from 17.1 °C in February to 26.2 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to November.
Can you swim in Symi in October?
Yes. In October the sea averages 23.6 °C – pleasant for swimming.
What is the warmest month in Symi?
August is the warmest month, with average highs of 30 °C and nights around 26 °C. January is the coolest month at 15 °C.
When does it rain most in Symi?
Rain is most frequent from December to January; the wettest month is December with 127 mm. The driest month is July with 0 mm.
How many hours of sunshine does Symi get?
Symi gets around 2,930 hours of sunshine a year. The sunniest month is June with 11.0 hours a day; in December there are 4.6 hours a day.
What time zone is Symi in?
Symi uses the time zone Europe/Athens: UTC+2 in January and UTC+3 in July.
How long is the flight from London to Symi?
A nonstop flight from London to Symi takes about 3 h 50 min, for a straight-line distance of about 2,770 km.
Which school holidays are best for Symi?
Symi has its best school-holiday weather during the summer holidays (score 100) and its weakest during the Christmas holidays (score 21). Holiday ratings (0–100): Easter holidays 36, May half-term 75, Summer holidays 100, October half-term 85, Christmas holidays 21.
Near Symi
Other destinations close by.
Places with a climate like Symi
Destinations whose weather through the year is closest to Symi's – good alternatives.