Field & vine
Across the U.S., watermelon ripen from Florida (mid-April) all the way to Vermont (early September). Hatched chalk is the early and late shoulder; the solid stretch is peak.
No chalk window in these states — no meaningful market production, so we'd rather say so than invent dates. Each page says where the supply really comes from.
Rarely offered u-pick — buy them at the farm stand, where the grower has already thumped and field-tested the load.
It depends where you stand. Across the U.S., watermelon ripen from Florida (mid-April) all the way to Vermont (early September). In most growing states the peak lands around August — your own state's row on the board above is the honest answer.
Florida, where the season runs mid-March to mid-July, and again mid-October to mid-December. Long seasons usually mean a big state with more than one growing region inside it.
Pick your state on the what's-in-season board (it remembers you), or jump to your state's row above — each one links to the full watermelon-and-state page.