Galissas weather in April 2025

Q: How hot is it in Galissas in April?

Daytime temperatures usually reach 18°C in Galissas in April, falling to 12°C at night.

Q: How sunny is it in Galissas in April?

There are normally 8 hours of bright sunshine each day in Galissas in April - that's 64% of daylight hours.

Q: How warm is the sea around Galissas in April?

The average sea temperature around Galissas in April is 16°C.

Q: Does it rain in Galissas in April?

There are usually 6 days with some rain in Galissas in April and the average monthly rainfall is 26mm.

Expect 64°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Galissas in April. Check more long-term weather averages for Galissas in April before you book your next holiday to Syros in 2025/2026.

64
64°F max day temperature
8
8 hours of sunshine per day
6
6 days with some rainfall
54
54°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
1.0
1.0 inches of monthly rainfall
6
6 (High) UV index
61
61°F sea temperature

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The April weather guide for Syros, represented by Galissas, (Galissas) 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) | Imperial (°F)