At what water temperature do largemouth spawn?
DFO’s synopsis reports nest preparation starting around 15.6 °C (60 °F), and an optimum around 20–21 °C (68–70 °F) for spawning/incubation in cited work. Those describe different stages and studies, not a switch for every fish. Use sustained local warming, nests and guarding behaviour; cold Canadian springs can delay the sequence.
The full story
This answer is one piece of a longer lesson — setups, diagrams and the reasoning behind it.
More questions about Spawning
- Do largemouth and smallmouth hybridize in the wild?
- How do I find largemouth beds?
- Do male or female largemouth guard the nest?
- How long do largemouth guard their fry?
- Is bed fishing harmful? Should I do it?
- Do largemouth eat while spawning?
- Do largemouth spawn more than once a year?
- Does the full moon really trigger the spawn?
Same topic, other species
- What temperature do crappie spawn at — and is it one event? — Crappie
- When and where do muskie spawn? — Muskellunge (Muskie)
- When and where do perch spawn? — Yellow Perch
- Why do pike spawn in flooded marshes at ice-out? — Northern Pike
- Do smallmouth and largemouth hybridize in the wild? — Smallmouth Bass
- What is a redd, and why must I never wade through one? — Trout (Rainbow · Brook · Lake)
- When and where do walleye spawn? — Walleye