How does the gulf stream affect the climate of London and south Portland Maine?

The Gulf Stream, a warm ocean current, significantly influences the climate of both London and South Portland, Maine. For London, it helps moderate temperatures, leading to milder winters and cooler summers than other regions at similar latitudes. In contrast, while South Portland also benefits from the Gulf Stream's warmth, it experiences more pronounced seasonal variations, resulting in colder winters compared to London. Overall, the Gulf Stream contributes to a generally temperate maritime climate in both locations, albeit with different degrees of seasonal variation.