What is this red line known as? What do we say about countries on this red line?

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Dublin and Moscow are a similar distance from the equator, yet look at the Moscow Winter vs Dublin Winter.

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It is because of the Gulf Stream. The Gulf Stream is an ocean current. It begins in the Gulf of Mexico where the water temperature reaches 30 degrees, it then moves across to Europe and so on.

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Is the ocean water warmer in Namibia or off the Irish coast.

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Ireland’s Sea Temperatures. Would you prefer to go swimming in the sea in December or May?

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Where is the warmest place to go swimming in Ireland?