Month-specific sea-surface temperature · Greece

Skiathos Sea Temperature in October

22.8°C

73.0°F

In October, sea-surface temperature near Skiathos has a historical monthly average of 22.8°C. This is not the reading for any particular holiday date.

Across 2023–2025, the lowest and highest yearly October monthly means were 22.0–23.2°C. These are not daily extremes.

Previous month

September · 25.2°C

Change into October: -2.4°C

Next month

November · 19.7°C

Change into next month: -3.1°C

Can you swim or snorkel in Skiathos in October?

At 22.8°C our temperature-only guide describes the water as mild water. Comfort depends on your cold tolerance, immersion time and wind. A historical average cannot determine whether conditions are safe on any given day.

Do you need a wetsuit?

A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.

Which beach should you choose?

Look for a beach sheltered from the actual forecast waves and wind on your visit. Exposure, currents and entry conditions vary even where water temperatures are similar. Follow local warnings.

Check the current waves, wind and snorkeling forecast →

A live forecast does not predict a future October. Check again close to your trip.

Skiathos Sea Temperature: All 12 Months

Choose a month for available historical evidence, month comparisons and swim guidance. Missing history is clearly marked and never presented as a long-term normal.

January 15.6°C February 15.4°C March 15.0°C April 16.3°C May 18.2°C June 23.6°C July 26.9°C August 26.8°C September 25.2°C October 22.8°C November 19.7°C December 17.1°C

Data source and limitations

Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature; 2023–2025. Marine model grid near 39.16, 23.49. Based on 3 yearly monthly means and 2232 recorded samples. Source methodology.

Modelled sea-surface temperatures do not establish underwater visibility, wildlife, calm currents or safe entry.