Summer Island Homes for Sale in St. Augustine, FL

Summer Island appeals to boaters and second-home buyers who want gated river access with the beach across the road.

Large homes dominate and the water tier sets the price, with direct Intracoastal frontage commanding clear premiums. Price a specific home off the closest comparable sales.

Inventory is thin in a 90-home gated community, so well-priced homes with documented dock rights move quickly.

Summer Island is about the water tiers: direct Intracoastal frontage, interior island lots, and everything between.

Backyard docks and lifts on the Matanzas River sit at the top of the market.

Interior lots share the launch, dock, and amenities at a lower entry price.

Homes span 1990s customs to newer coastal construction, so condition and elevation vary.

The amenity set is built around the water, which is exactly why buyers shop here.

A resident launch on the Matanzas River, one of the few in the area.

A community dock available to homeowners, with slips and lifts at individual homes on the river.

A community pool and clubhouse anchor the social side.

Courts round out the amenity set.

Everyday needs run to Crescent Beach and the US-1 corridor, with the St. Augustine Beach restaurants about ten minutes north and the historic district twenty-plus minutes away. The beach across A1A and the river out back are the real amenities.

Private launches are nearly impossible to replicate on this stretch of coast, which protects Summer Island values. Confirm the launch and slip rules and any waitlist before you write.

The Matanzas out back and the ocean across A1A is a rare pairing; surf in the morning, fish the river in the afternoon.

Coastal flood and wind quotes vary widely by elevation and construction year. Get the quote before the offer, not after.

St. Johns County flooding concentrates near the Intracoastal, the coast, and the creeks and marshes, while many inland master-planned communities sit in lower-risk zones. A barrier-island address like Summer Island, between the Matanzas River and the ocean, sits squarely in coastal flood and wind territory, so the insurance read is central, not an afterthought.

The reliable move is to pull the FEMA flood designation for the exact Summer Island address before you write an offer, since two homes in the same area can fall in different zones, and the elevation certificate matters here. A home built to a higher base flood elevation can cost far less to insure than a lower one nearby. Get a bindable flood and homeowners quote, plus a separate wind quote, during your inspection period, so the cost is in your monthly math before you commit, not after. St. Johns County is a strong flood-mitigation participant, which earns NFIP policyholders a meaningful automatic discount, but a barrier-island home is still a coastal risk to underwrite carefully.

St. Johns County is well served by AT&T (fiber in most newer communities) and Xfinity (Comcast), though fiber availability still varies by street, and a 1990s coastal enclave can lag the newer inland subdivisions. If working from home matters, confirm the options, and fiber in particular, at the specific Summer Island address rather than assuming.

St. Johns County total millage varies by district. The Florida homestead exemption for 2026 is 51,411 dollars for those who qualify, and the deadline to file a new homestead exemption is March 1. For a second-home or rental buyer, note that homestead does not apply, so budget the full tax bill.

The trap to plan for is the post-sale reset: when you buy, the Save Our Homes cap from the previous owner ends and the assessed value resets to the new just value, so your second-year tax bill is often higher than the seller's current one. Budget the true number, confirm the HOA dues and exactly what the launch and dock access include, and verify the dock and lift permits on any riverfront home before you write.

Most buyers weighing Summer Island are cross-shopping the other gated coastal St. Augustine communities, balancing the rare river-launch setup against golf, marsh, or oceanfront alternatives. Here is the honest shorthand.

The honest verdict: if you want gated river access with a resident boat launch, a dock, and the ocean across the road, Summer Island is one of the rare two-water boating setups on this stretch of coast, and that scarcity is the value case. If you want golf, a larger amenity campus, or newer construction, the communities nearby are the right field to shop, and we will help you weigh the launch and dock rights against the alternatives.