Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 2.7 °C | — | 13 days | Unfavourable season |
| February | 5.7 °C | — | 12 days | Unfavourable season |
| March | 9.7 °C | — | 11 days | Unfavourable season |
| April | 14.2 °C | — | 11 days | Possible, with trade-offs |
| May | 18.6 °C | — | 14 days | Possible, with trade-offs |
| June | 23.6 °C | — | 13 days | Pleasant — a good time to go |
| July | 25.3 °C | — | 13 days | Pleasant — a good time to go |
| August | 25.6 °C | — | 11 days | Pleasant — a good time to go |
| September | 20.4 °C | — | 10 days | Pleasant — a good time to go |
| October | 14.9 °C | — | 11 days | Possible, with trade-offs |
| November | 8.6 °C | — | 11 days | Unfavourable season |
| December | 4.3 °C | — | 12 days | Unfavourable season |
Before you go
Three things to check once you have picked your dates.
Entry
Czechia is in the European Union. Entry rules depend on your nationality — check before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 10 July 2025
Health
Recommended vaccinations, water quality, mosquitoes: advice depends on the country and the season. Some vaccines need time before departure.
Beau Fixe is not a safety or health authority. These notes summarise public advisories and link to their source; only the competent authorities are authoritative. Alert levels: Foreign, Commonwealth & Development Office (gov.uk), Open Government Licence v3.0.
FAQ
Can you swim in Ostrava in May?
Ostrava is not a seaside destination (no sea data).
How hot is Ostrava in May?
Expect 18.6°C in the afternoon and 8.9°C at night, averaged over the last 10 years.
Does it rain a lot in Ostrava in May?
Around 14 days with rain (≥ 1 mm) in the month — 45% of days.