There are plenty of places that have Wi-Fi systems riddled with problems and if you are using them a lot, I would say - NO that's not enough by a long way.
My reasoning is that HTTPS is hard to get right and relatively easy to break. In addition, you are still leaking a fair bit of information when browsing over HTTPS.
Apart from the usual protections (anti-virus, etc). Running the latest OS fully patched. Using full disk encryption. That is the starting point. BTW, if using Windows, do yourself a favour and make sure it is W10 latest version.
Next up is hardening your browser. Firstly get a great ad-blocker - too many drive-by attacks now come via rogue adverts.
But the thing you should most invest in is a VPN solution. This is really the only realistic way to retain a good level of security when travelling a lot. Run your own or buy a decent 3rd party solution but that's the need.
If you are travelling to certain locations and have high-value data on your PC, even that may not be enough. In those locations you need a hardened VPN solution that kicks in before login. You should also ensure that you never walk away from your PC with it left in standby or on the login screen.
Oh, one other thing. Check local laws before you go. I think everywhere in Europe is OK but in some other countries, it might be illegal to use some of that technology. Also be careful if you take the same laptop from Europe to the USA. US Border staff are notorious for demanding access to laptops and that could put you at odds with the EU data protection laws. Better in those cases to empty all data from the laptop (with a secure delete program) and then securely download it (via VPN of course) when in-country.
Enjoy your travels!