Weak toFightingSteelFireWaterGrass ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	86.6
Lucario	FightingSteel	Force PalmAura SphereLegacy	73.5
Reshiram	DragonFire	Fire FangFusion FlareLegacy	71.9
Kartana	GrassSteel	Razor LeafLeaf Blade	70.3
Pheromosa	BugFighting	Low KickFocus Blast	67.2
Terrakion	RockFighting	Double KickSacred SwordLegacy	67.0
Blaziken	FireFighting	CounterAura Sphere	66.4
Chandelure	GhostFire	Fire SpinOverheat	65.8
Cinderace	Fire	Fire SpinPyroball	64.9
Volcarona	BugFire	Fire SpinOverheat	64.2
Metagross	SteelPsychic	Bullet PunchMeteor MashLegacy	64.2
Darmanitan	Fire	Fire FangOverheat	64.0

Clear boosts the Fire attacks above. Clear and Snow boost Swinub.

Level 40, 15 attack IV, costed against Swinub's own defense and typing, one per evolution family.

Swinub's moveset, CP and shiny All counters Raid board

Questions people ask

What is Swinub weak to in Pokémon GO?

Swinub takes 1.6 times from Fighting, Steel, Fire, Water and Grass.

What's the best counter to Swinub?

Blacephalon with Incinerate and Mind Blown, worth 86.6 damage per second against Swinub's own defense. The full ranking is above.