Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 18.6 °C | 22.3 °C | 18 days | Possible, with trade-offs |
| February | 19.1 °C | 22.4 °C | 17 days | Unfavourable season |
| March | 21.5 °C | 23.2 °C | 17 days | Possible, with trade-offs |
| April | 24.3 °C | 24.4 °C | 18 days | Possible, with trade-offs |
| May | 26.9 °C | 26.2 °C | 21 days | Unfavourable season |
| June | 29.5 °C | 27.7 °C | 21 days | Unfavourable season |
| July | 30.6 °C | 28.6 °C | 18 days | Possible, with trade-offs |
| August | 30.1 °C | 28.7 °C | 21 days | Unfavourable season |
| September | 28.8 °C | 28.2 °C | 21 days | Unfavourable season |
| October | 25.9 °C | 26.7 °C | 23 days | Unfavourable season |
| November | 23.4 °C | 25.1 °C | 23 days | Unfavourable season |
| December | 19.8 °C | 23.6 °C | 21 days | Unfavourable season |
Nearby in August
Before you go
Three things to check once you have picked your dates.
Entry
No visa needed for stays of up to 90 days. Passport valid for at least 6 months. Submit the Taiwan Arrival Card (TWAC) online within 3 days before arrival; the 90-day visa-free stay can be extended by a further 90 days in Taiwan.
For a British passport, per the UK Foreign Office on 28 August 2026. Rules change: check before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 28 August 2026
Health
Vaccines · hepatitis A and hepatitis B if you are not already vaccinated; Japanese encephalitis depending on activities and areas visited. Routine vaccines up to date (measles in particular).
Yellow fever · No yellow fever locally, vaccine not recommended. No entry requirement.
Malaria · None.
Mosquitoes · dengue reported: protect yourself from bites.
Per the CDC (page reviewed 25 August 2026); see a travel clinic a few weeks before departure.
Beau Fixe is not a safety or health authority. These notes summarise dated public texts and link to their source: France Diplomatie (Licence Ouverte 2.0), Foreign, Commonwealth & Development Office (gov.uk, Open Government Licence v3.0), Centers for Disease Control and Prevention (Source: CDC). Only the competent authorities are authoritative.
FAQ
Can you swim in Yilan in August?
The sea averages 28.7°C in August — yes, pleasant swimming.
How hot is Yilan in August?
Expect 30.1°C in the afternoon and 25°C at night, averaged over the last 10 years.
Does it rain a lot in Yilan in August?
Around 21 days with rain (≥ 1 mm) in the month — 67% of days.