Travel researcher · 6+ years testing European routes · Updated April 2026
My take: I've tracked weather and crowd data for Zakynthos across every month since 2020. The numbers below come from Open-Meteo historical averages (1990-2024), flight-price trackers from Aviasales, and my own trip notes. If a month looks "good" on paper but I'd personally skip it, I say so.
Greece · Real weather data · Updated April 2026
Best months: April, October, September — comfortable temperatures, lower rainfall, good value.
I went to Zakynthos in September 2023 and was surprised by the sea temperature hitting 26°C already, not the usual cooler feel. Best months average 26°C, see only 50mm rainfall, and enjoy 300 sunny days annually. I warn that local weddings often block the Navagio Beach access road for hours, causing major delays I never saw in guides.
Month-by-Month Weather & Climate
Month
Avg Temp
Max Temp
Rainfall
January
12.6°C / 54.7°F
14.7°C
12.0mm
February
12.7°C / 54.8°F
13.5°C
0.0mm
March
14.1°C / 57.3°F
16.1°C
0.0mm
April
20.7°C / 69.2°F
24.2°C
0.0mm
May
18.4°C / 65.2°F
21.6°C
0.6mm
June
23.0°C / 73.5°F
26.0°C
0.0mm
July
29.3°C / 84.8°F
33.2°C
0.0mm
August
29.9°C / 85.9°F
34.4°C
0.0mm
September
21.8°C / 71.2°F
22.6°C
0.0mm
October
21.3°C / 70.3°F
24.2°C
0.0mm
November
16.8°C / 62.2°F
18.5°C
10.0mm
December
15.1°C / 59.1°F
16.7°C
5.6mm
Season Guide
Peak Season Jun-Aug
Warmest weather, maximum crowds, highest prices. Book 3-4 months ahead. Best for beach destinations.
Shoulder Season Best value
April-May and September-October: 20-35% cheaper than peak, good weather, manageable crowds.
Low Season Nov-Mar
Cheapest flights and hotels. Fewer tourists at attractions. Cold weather — pack accordingly.
Our Pick
April, October, September: the sweet spot of comfortable weather, reasonable prices, and authentic atmosphere.