Syros weather by month & the best time to visit
Greece · beach resort · Mediterranean climate
The best time to visit Syros is July — its sunniest month (Sunshine Score 95/100), with August and June close behind. Syros averages about 2,874 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 5 mm of rain in July.
When is the best time to visit Syros?
For sunshine, the best time to visit Syros is July, then August and June. The dullest month is January (32/100, 99 mm of rain). The full month-by-month picture is in the table below.
How sunny is Syros?
Syros gets a lot of sun: around 2,874 hours a year. 63 Sunshine Score points separate July (95) from January (32), so the month you pick matters. It ranks #23 of 40 destinations in Greece for annual sunshine, below the national median of 2,896 hours. Rain has a clear season: the wettest stretch, around January, carries about 50% of the annual 534 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 32 | 13° / 55°F | 11° / 52°F | 99 mm | 2 | 16° / 61°F |
| February | 34 | 13° / 55°F | 11° / 52°F | 78 mm | 3 | 16° / 61°F |
| March | 51 | 15° / 59°F | 13° / 55°F | 51 mm | 4 | 17° / 63°F |
| April | 61 | 16° / 61°F | 14° / 57°F | 27 mm | 6 | 17° / 63°F |
| May | 92 | 20° / 68°F | 18° / 64°F | 20 mm | 7 | 19° / 66°F |
| June | 94 | 24° / 75°F | 22° / 72°F | 9 mm | 9 | 23° / 73°F |
| July | 95 | 26° / 79°F | 24° / 75°F | 5 mm | 9 | 25° / 77°F |
| August | 95 | 26° / 79°F | 24° / 75°F | 4 mm | 8 | 26° / 79°F |
| September | 92 | 24° / 75°F | 22° / 72°F | 24 mm | 7 | 25° / 77°F |
| October | 86 | 21° / 70°F | 19° / 66°F | 53 mm | 4 | 23° / 73°F |
| November | 69 | 18° / 64°F | 16° / 61°F | 73 mm | 2 | 20° / 68°F |
| December | 46 | 15° / 59°F | 13° / 55°F | 91 mm | 1 | 18° / 64°F |
Sea temperature in Syros by month
The sea off Syros is warmest in August at around 26°C / 79°F, and coolest in January at 16°C / 61°F. The water sits at a comfortable 21°C or warmer roughly 5 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Syros: questions and answers
What kind of destination is Syros?
Syros is a beach resort in Greece with a Mediterranean climate — the sea reaches 26°C at its warmest and is swimmable (21°C+) about 5 months a year.
How many hours of sunshine does Syros get a year?
Syros gets about 2,874 hours of sunshine a year, at its best around July.
When is the best time to visit Syros?
The sunniest time to visit Syros is July, when the Sunshine Score peaks at 95/100 (with August and June close behind). Expect daytime highs around 26°C / 79°F.
What is the least sunny month in Syros?
January is the least sunny month in Syros, scoring 32/100 with about 99 mm of rain.
What is the sea temperature in Syros?
The sea in Syros ranges from about 16°C (January) to 26°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Syros?
The typical midday UV index in Syros peaks around 9 (very high) in June, easing to about 1 (low) in December. Month-by-month midday UV values are in the UV column of the table on this page.
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