ERA5 almanac comparison — 8 years of real data
Algarve vs Santorini: weather in April
Algarve edges out Santorini for sun in April: 20% clear historically versus 14% (8-year ERA5 average, a 6-point gap). Both are viable — Algarve is the safer bet.
What you are reading: 8-year historical averages, not a forecast.
Either destination can still surprise you this specific April. For this
week’s actual forecast, each destination links to its live page below.
Algarve
PT
- Clear days, April
- 20%
- Sample size
- n=240 days
- Avg high
- 68°F
- Early April (1st–15th)
- 16%
- Late April (16th–end)
- 25%
Santorini
GR
- Clear days, April
- 14%
- Sample size
- n=240 days
- Avg high
- 68°F
- Early April (1st–15th)
- 9%
- Late April (16th–end)
- 18%
Compare Algarve vs Santorini in another month
All percentages are historical averages from the ERA5 reanalysis via Open-Meteo, 8 full years (2018–2025). “Clear” means avg high ≥ 72 °F, precipitation < 1 mm, and a non-precipitation weather code. This is history, not a forecast. The live 7-day outlook for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.