Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | -0.8 °C | 2.6 °C | 14 days | Unfavourable season |
| February | 0.3 °C | 1.3 °C | 12 days | Unfavourable season |
| March | 3.5 °C | 1.4 °C | 11 days | Unfavourable season |
| April | 8.5 °C | 3 °C | 10 days | Unfavourable season |
| May | 15.2 °C | 7.4 °C | 8 days | Possible, with trade-offs |
| June | 20.1 °C | 13.2 °C | 10 days | Pleasant — a good time to go |
| July | 21.2 °C | 17.1 °C | 15 days | Possible, with trade-offs |
| August | 20.8 °C | 17.9 °C | 15 days | Possible, with trade-offs |
| September | 16.2 °C | 15.4 °C | 12 days | Possible, with trade-offs |
| October | 9.5 °C | 11.4 °C | 14 days | Unfavourable season |
| November | 4.6 °C | 8.2 °C | 14 days | Unfavourable season |
| December | 1.3 °C | 5.2 °C | 14 days | Unfavourable season |
Before you go
Three things to check once you have picked your dates.
Entry
Estonia is in the European Union. Entry rules depend on your nationality — check before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 11 August 2026
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 Tallinn in September?
The sea averages 15.4°C in September — too cold for most swimmers.
How hot is Tallinn in September?
Expect 16.2°C in the afternoon and 10.2°C at night, averaged over the last 10 years.
Does it rain a lot in Tallinn in September?
Around 12 days with rain (≥ 1 mm) in the month — 41% of days.