Galissas weather live forecast

Today's maximum temperature in Galissas is expected to be 24°C. Select a day from the live weather forecast for Galissas, Syros, Greece for more weather parameters.

Monday
18th May
24

16

13

9
Tuesday
19th May
24

18

12

8
Wednesday
20th May
24

18

11

7
Thursday
21st May
25

19

14

8
Friday
22nd May
23

18

4

6

5-day weather forecast updated at 04:01 on Monday 18th May 2026 GMT

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Recommended for Syros

The 5-day weather forecast for Syros, represented by Galissas, (Galissas) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Galissas weather forecast by day

Below are the detailed weather forecasts for Galissas for the next 5 days.

Galissas weather for Monday 18th May 2026

Expect clear skies in Galissas, Syros with a maximum temperature of 24°C, maximum UV of 9 (Very High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north.

24
°C maximum temperature
16
°C minimum temperature
clear skies
13
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
24
°C wind chill
16
kph wind from N

Galissas weather for Tuesday 19th May 2026

Expect clear skies in Galissas, Syros with a maximum temperature of 24°C, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the west.

24
°C maximum temperature
18
°C minimum temperature
clear skies
12
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
13
kph wind from W

Galissas weather for Wednesday 20th May 2026

Expect scattered clouds in Galissas, Syros with a maximum temperature of 24°C, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 28 kph from the north-west.

24
°C maximum temperature
18
°C minimum temperature
scattered clouds
11
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
28
kph wind from NW

Galissas weather for Thursday 21st May 2026

Expect clear skies in Galissas, Syros with a maximum temperature of 25°C, maximum UV of 8 (Very High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

25
°C maximum temperature
19
°C minimum temperature
clear skies
14
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
25
°C wind chill
16
kph wind from NW

Galissas weather for Friday 22nd May 2026

Expect isolated thunderstorms in Galissas, Syros with a maximum temperature of 23°C, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 24% chance of some rain and a gentle breeze of 16 kph from the north-west.