Syros weather in May 2025

Q: How hot is it in Syros in May?

Daytime temperatures usually reach 22°C in Ermoupolis, Syros in May, falling to 15°C at night.

Q: How sunny is it in Syros in May?

There are normally 10 hours of bright sunshine each day in Ermoupolis, Syros in May - that's 73% of daylight hours.

Q: How warm is the sea around Syros in May?

The average sea temperature around Ermoupolis, Syros in May is 18°C.

Q: Does it ever rain in Syros in May?

There are usually 3 days with some rain in Ermoupolis, Syros in May and the average monthly rainfall is 16mm.

Expect 22°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Syros in May. Check more long-term weather averages for Syros in May before you book your next holiday to Syros in 2025/2026.

22
22°C max day temperature
10
10 hours of sunshine per day
3
3 days with some rainfall
15
15°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
16
16 mm of monthly rainfall
8
8 (Very High) UV index
18
18°C sea temperature

More about Syros

Syros by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Syros

TUI: up to 7% off holidays booked online

Sale

Book online with TUI & save up to 7% on holidays
FREE child places available for select holidays
Pay £0 deposits with direct debit & spread the cost

Go to TUI deal >>

View all TUI offers

TUI deal finder

Destination

The May weather guide for Syros, represented by Ermoupolis, (Ermoupolis) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about Greece

How hot is it in Syros in May?

Daytime temperatures usually reach 22°C in Ermoupolis, Syros in May, falling to 15°C at night.

How sunny is it in Syros in May?

There are normally 10 hours of bright sunshine each day in Ermoupolis, Syros in May - that's 73% of daylight hours.

How warm is the sea around Syros in May?

The average sea temperature around Ermoupolis, Syros in May is 18°C.

Does it ever rain in Syros in May?

There are usually 3 days with some rain in Ermoupolis, Syros in May and the average monthly rainfall is 16mm.

Syros May sunrise & sunset times

Browse the sunrise and sunset times for Syros in May 2025. Select a month to view Syros sunrise and sunset times for the next 12 months. The Syros sunrise and sunset times shown below are for Ermoupolis.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec