What I do is all based on water temps. Water below 60 for me always requires a wet suit or dry suit (usually dry suit). Above 70 and usually nothing, it is that 60-70 range I start varying depending on air temp and other conditions (such as my likelihood of swimming).
So for what you say, and assuming not rock gardening, surfing, or other situation with higher likelihood of swimming, I would probably go with a 2 mm shorty wet suit. Or if the water was at that warmer end and air was quite warm, maybe a 0.5 mm neoprene shirt.
Classic Freestanding Rack
Electric Kayak Motor
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