Internet, cell service and grocery stores should be available in most of the EU, with perhaps the exception the rural areas on the countries at the Easter side. Be aware though that for a North American, grocery stores are closed often. Being open 24/7 is very rare, and they typically close 6PM-10PM, depending on the country. In many countries, as a general rule, shops are closed on Sundays.

Pubs however, assuming you mean the UK definition of pub, are only found in the UK and Ireland. The rest of Europe has bars, cafes, and restaurants.

As for health care, that varies a lot. Just as it varies a lot in North America (large difference between Canada and the USA).

As for seasons, well, stay over there. I've lived on both sides of the pond and where I lived in the USA (NE coast), you had seasons. Much better defined than anywhere in Europe. As for sailing, most European countries border a sea.