[alpinisme]

The article doesn’t say that the ocean is irrelevant just that it’s not the oceanic currents that dominate. The main thing is just having an ocean at all coupled with prevailing winds being west to east. Hence Seattle, which is mild but does not benefit from Gulf Stream like currents

[graemep]

Yes, I get that. To clarify I meant proximity to heat in the sea "stored" from warmer times of the year without the effect of the Gulf Stream is clearly an important factor.