Cielo Shelter
Essentially a tent with two missing walls, the Cielo is designed primarily for day use. However, on warm nights it could be used to put a roof over your head. The tent sets up quickly and weighs only 6 pounds, meaning it can easily fit in a car trunk and likely a backpack. The Cielo even offers 50 SPF sun protection. While prices can vary slightly from retailer to retailer, the Cielo Shelter cost approximately $80 in 2009.
MSR Hubba Hubba
The Hubba Hubba is a relative rarity when it comes to backpacking tents, because it is entirely free-standing. Designed to withstand high winds, the Hubba Hubba sets up quickly and comes in a small package. Best of all, the exterior is almost entirely mesh, allowing those cool sea breezes and views to drift right in. The MSR Hubba Hubba can be found for $239, as of 2009.
Big Agnes Parkview
Designed to be spacious and portable, the Big Agnes Parkview is perfect for the day and night use your tent will endure while at the beach. The roof is mostly mesh, allowing for late-night stargazing. Plus, the tent is designed to maintain its shape on any terrain, maximizing your space. While prices vary, as of 2009 the Big Agnes Parkview can typically be found for between $250 and $329.
Shangri-La 4
A radical design makes the Shangri-La 4 an exciting pick for a beach camping trip. Shaped like a teepee, with a large center pole holding the entire structure, the Shangri-La is downright voluminous. Plus, you don't have to worry about sand getting everywhere, because it has no floor. The only downside to the Shangri-La is its reliance on tension-tightened lines. A good alternative to stakes is to bring along stuff-sacks, fill them with sand and bury them. This should provide the necessary stability on the Shangri-La's lines. As of 2009, the Shangri-La 4 can be found for around $225.