15 Best Costco Summer Staples to Buy Right Now

Why Costco Is the Ultimate Summer Shopping Destination

When summer rolls around, there's no better place to stock up on everything you need than Costco. Whether you're hosting backyard barbecues, heading to the beach, or simply trying to keep the whole family fed during the long, hot days, Costco delivers incredible value on seasonal favorites. Editors who shop the warehouse giant regularly know that the summer season brings a fresh wave of limited-time finds, and if you snooze, you lose. This guide rounds up 15 editor-approved Costco summer staples that are absolutely worth adding to your shopping list right now.

Editor-Approved Costco Summer Food Staples

1. Kirkland Signature Organic Lemonade

No summer is complete without a refreshing glass of lemonade, and Costco's Kirkland Signature Organic Lemonade delivers exactly that in bulk. Made with real lemon juice and just the right amount of sweetness, this crowd-pleaser is perfect for parties, pool days, and lazy afternoons on the porch. The large-format packaging means you'll always have enough on hand for unexpected guests.

2. Fresh Watermelon

Costco's seasonal produce section shines in summer, and the whole seedless watermelons are among the best values you'll find anywhere. Sweet, crisp, and enormous, these melons are ideal for slicing up at cookouts or keeping chilled for snacking throughout the week. The price per pound is unbeatable compared to most grocery stores.

3. Kirkland Signature Rotisserie Chicken

A Costco classic that becomes even more valuable in summer, the famous $5 rotisserie chicken is perfect for quick weeknight meals when nobody wants to heat up the kitchen. Shred it into salads, stuff it into wraps, or serve it alongside grilled corn — this versatile staple earns its legendary status season after season.

4. Sabra Hummus Variety Pack

Summer entertaining calls for easy snacks, and Costco's multi-pack of Sabra Hummus individual cups is a genius find. Perfect for pool parties, picnics, and kids' lunches, each portion comes pre-packed and pairs beautifully with the fresh-cut vegetables Costco also sells in convenient trays. Editors love grabbing these in bulk at the start of the season.

5. Kirkland Signature Frozen Shrimp

Grilling season demands great protein options, and Costco's large bags of frozen, pre-deveined shrimp are a go-to for editors all summer long. Quick to thaw and incredibly versatile, these shrimp work equally well on skewers over the grill, tossed into pasta, or served cold with cocktail sauce at your next gathering.

6. Tillamook Ice Cream Bars

When the mercury climbs, nothing beats a premium ice cream bar straight from the freezer. Costco's multi-packs of Tillamook ice cream bars offer rich, creamy flavor at a fraction of the per-bar cost you'd pay elsewhere. Stock the freezer with these and you'll be the most popular house on the block all summer.

Costco Summer Drinks Worth Stocking Up On

7. Sparkling Water Variety Packs

Staying hydrated in summer is non-negotiable, and Costco's sparkling water variety packs make it easy and affordable. Brands like LaCroix and Kirkland's own sparkling water line offer crates of assorted flavors that keep everyone in the family happy without resorting to sugary sodas. At Costco prices, there's no reason not to have cases on hand.

8. Cold Brew Coffee Concentrate

Summer mornings are made better with cold brew, and Costco stocks large bottles of ready-to-dilute cold brew coffee concentrate that stretch incredibly far. A single bottle can make dozens of iced coffees, making it one of the most economical picks in the beverage aisle. Editors who rely on their morning caffeine fix swear by this seasonal staple.

9. Organic Coconut Water

Ideal for post-workout recovery or simply staying refreshed on hot days, Costco's bulk packs of organic coconut water are a smart buy. Naturally rich in electrolytes, coconut water is a healthier alternative to sports drinks and tastes great chilled straight from the can or mixed into summer smoothies.

Outdoor and Lifestyle Picks for Summer

10. Coleman Portable Cooler

Costco reliably stocks a solid selection of Coleman coolers each summer, and editors recommend snagging one early before they sell out. Whether you need a small personal cooler for beach days or a large rolling model for camping, the prices at Costco are hard to beat. These coolers hold ice for hours and are built to last through many summers of adventures.

11. Outdoor Folding Chairs

Summer living happens outdoors, and Costco's seasonal selection of folding and camp chairs offers remarkable comfort and durability at warehouse prices. Editors are particularly fond of the padded, cup-holder-equipped models that work just as well at a backyard fire pit as they do at the park or beach.

12. Sunscreen Multi-Packs

One of the smartest buys at Costco each summer is sunscreen in bulk. Multi-packs of broad-spectrum SPF 50 from brands like Sun Bum or Neutrogena give you enough supply for the whole season without the constant drugstore runs. Editors recommend buying two packs early — you will go through more than you think.

13. Bug Repellent Bundle

Warm evenings outdoors inevitably mean bugs, and Costco's bundled insect repellent offerings let you keep the whole household protected without spending a fortune. Look for DEET-free options suitable for children as well as more heavy-duty formulas for camping and hiking trips.

Bonus Summer Essentials Editors Can't Stop Recommending

14. Kirkland Signature Disposable Plates and Cutlery

Hosting summer parties is so much easier when you stock up on high-quality disposable tableware from Costco. The Kirkland Signature options are sturdier than most grocery-store alternatives and come in large enough quantities to cover multiple gatherings. Editors love having a cabinet stocked with these from Memorial Day through Labor Day.

15. Patio String Lights

No summer outdoor space is complete without the warm glow of string lights, and Costco regularly offers weather-resistant LED patio light sets at prices that make it easy to illuminate an entire backyard. These sets consistently earn high marks from editors for their durability, warm color temperature, and the effortlessly inviting ambiance they create on summer evenings.

Shop These Costco Summer Finds Before They're Gone

Costco's seasonal inventory moves fast, and many of these summer staples are available only for a limited time. The beauty of shopping at Costco is that you get premium quality at bulk-purchase prices, which means stocking up isn't just convenient — it's genuinely economical. Whether you're feeding a crowd, preparing for outdoor adventures, or simply elevating your everyday summer routine, these 15 editor-approved picks are the smartest additions you can make to your Costco cart right now. Don't wait until the season peaks to discover that your favorites have already sold out.

Shop early in the season for the best selection of outdoor furniture and coolers.
Check the seasonal aisle on every visit, as inventory rotates frequently throughout summer.
Buying in bulk at Costco for items like sunscreen and sparkling water offers significant per-unit savings compared to regular retail stores.
Many seasonal food items — especially frozen desserts and fresh produce — sell out quickly in summer, so grab extra when you see them.

Summer is short, and the best Costco finds go even faster. Use this editor-approved list as your guide and make the most of every warehouse run this season.