Kastro
Ionioi Nisoi · Greece
Rating right now
Kastro is a NE-facing sand beach on the Myrtoan Sea coastline near Ionioi Nisoi — it picks up N–E swell and turns cleanest in a S–W wind, with the most consistent surf through april–october.
10-day forecast
Local time · updates hourly
Wave height & period
Wind
| Time | Rating | Waves | Swell | Wind | Air |
|---|---|---|---|---|---|
Water temperature by month
This month: ~25°C (77°F) on average
Jan
16.1°C
61°F · 14.8–18.4°C
Feb
15.4°C
59.7°F · 14.3–16.4°C
Mar
15.3°C
59.5°F · 14–16.7°C
Apr
16.7°C
62.1°F · 15.2–20°C
May
19.5°C
67.1°F · 16.8–23°C
Jun
23.2°C
73.8°F · 20.7–26.4°C
Jul
25°C
77°F · 22.8–27.3°C
Aug
26.3°C
79.3°F · 23.7–28.1°C
Sep
25°C
77°F · 22.4–28.1°C
Oct
22.8°C
73°F · 20.8–24.7°C
Nov
20.2°C
68.4°F · 18–22.4°C
Dec
17.8°C
64°F · 15.6–19.7°C
25-year monthly averages from the NOAA OISST satellite record — typical range min–max, not a live reading.
Know before you go
Best swell
N–E
Best wind
S–W
Break type
Beach break
Best season
April–October
Safety: Friendly by surf standards, but rip currents and drop-in etiquette still apply. Shifting sandbars create moving rip currents — learn to spot them and use them to get out back.
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