Should Southeast Be Hyphenated?

Don't use hyphens after adverbs ending in 'ly', eg an internationally recognised course, scientifically rigorous research. Use hyphens in points of the compass, eg south-east, north-west, but there are exceptions, as in southeasterly.

Is southeast one word or two?

Meaning of southeast in English. (written abbreviation S.E.) the direction that is between south and east: We live in the southeast of the city.

Do you write south east or southeast?

If I'm not mistaken, "south-east" is how it is written in British English, whereas "southeast" is the form in American English.