FleaDates › Flea season › Delaware › Wilmington
Wilmington · DE
When does flea season start in Wilmington?
Flea season in Wilmington typically runs late March to mid-November, peaking May–Sep.
Ticks in Wilmington
Local tick activity typically runs late February to mid-December, heaviest Apr–Oct. The species to know in Delaware: blacklegged (deer) tick, lone star tick, American dog tick.
More on species and timing: Delaware tick season.
Numbers come from NOAA U.S. Climate Normals (1991–2020) recorded at WILMINGTON NEW CASTLE CO AP — a climate-based estimate; real years wobble.
Frequently asked questions
When does flea season start in Wilmington?
Around late March in a typical year, once local averages hold around 50°F. A warm spring pulls it earlier — prevention shouldn't wait for the calendar.
Is flea season in Wilmington different from the rest of Delaware?
Not meaningfully — Wilmington tracks the Delaware statewide estimate closely. Both are climate-based estimates, so treat the edges as fuzzy, not exact.
Do dogs in Wilmington need prevention outside flea season?
Yes — vets recommend year-round parasite prevention regardless of the local calendar. Indoor fleas ignore the weather entirely, and ticks in Delaware are typically active mid-February to mid-December, a longer window than fleas get.