Regardless of which look you're going for, a good foundation is the key for an even makeup application. One of the features with this foundation is that it's waterproof.
From LOOKFANTASTIC
Bobbi Brown Skin Long-Wear Weightless Foundation SPF15 (Various Shades) - Warm Sand
Cosmetify
Bobbi Brown Skin Long Wear Weightless Foundation SPF 15 Warm Sand
This product is also available at 4 unverified merchants.