You can wear a long sleeve top under a short sleeve dry top. Fairly common for the whitewater folks up here in the mid-range temps. I have done it here and there paddling.
Water will climb up the sleeve past the arm gasket, amount depends on how much immersion and the material. The gasket won't stop water from following natural paths in the garment. But - it will allow you to still be warm even if the top gets damp by blocking wind.
Actually, come colder weather I have been known to pull out less breathable layers on purpose. But I am talking a colder set of temps than you are. That approach may be overkill for you.
Electric Kayak Motor
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