Two days covers Amelia Island itself. The third day is the interesting one, because it is a genuine choice rather than a continuation.
Days one and two
Do the weekend plan: north end and downtown on day one — Fort Clinch, Old Town, Centre Street, sunset over the river — and the water and the south end on day two, with a marsh kayak trip in the morning and American Beach, Peters Point or the state park after.
That leaves day three.
Option A: Cumberland Island
The strongest option if you like walking and wild places. Cumberland Island National Seashore is a barrier island immediately north across Cumberland Sound, in Georgia — eighteen miles of undeveloped beach, maritime forest, the ruins of the Carnegie estate at Dungeness, and famously, wild horses.
The practicalities decide whether it works for you:
- The ferry leaves from St Marys, Georgia, about 35 minutes' drive north via A1A and I-95.
- Reservations are required and it books out, particularly in spring. Book before you travel.
- There are no shops on the island. You carry your water and food in, and your rubbish out.
- It is a full day — ferry over, several hours walking, ferry back.
Worth every bit of the logistics. This is the best day trip in northeast Florida or southeast Georgia.
Option B: the Talbot Islands and Kingsley Plantation
The southbound alternative, and easier: everything is within forty minutes and there is no ferry.
Big Talbot Island State Park has Boneyard Beach — a stretch of shoreline littered with the bleached skeletons of fallen live oaks, one of the most photographed coastal landscapes in Florida. Little Talbot Island State Park has a long undeveloped barrier beach and trails.
Fort George Island and Kingsley Plantation, in the Timucuan Ecological and Historic Preserve, hold the surviving plantation house and, more importantly, the row of tabby slave cabins — one of the most direct pieces of interpretation of slavery anywhere in Florida. It is a hard, necessary visit.
This option pairs well with a stop in Jacksonville on the way back if the weather turns.
Option C: stay on the island and slow down
Legitimate, and the right answer for some trips. What the third day buys you if you spend it here:
The Fort Clinch bike trail — six miles of off-road riding through maritime hammock, plus the shorter walking trails.
A full slow beach day at Amelia Island State Park: shelling, the George Crady Bridge pier, and nobody around.
Beach horseback riding — the only Florida state park that permits it. Guided, reservation-only, sells out in spring and autumn, so book before you travel.
Golf, concentrated on the south-end resort courses.
A boat tour or a fishing charter from the Fernandina Harbor Marina — the river, the marsh and Cumberland Sound from the water, with dolphins near-guaranteed.
The Egans Creek Greenway at first light, properly, rather than as a half-hour stop.
Which to pick
First visit, decent weather, you like walking → Cumberland Island.
Travelling with children, or you would rather not commit to a ferry schedule → the Talbot Islands and Kingsley Plantation.
You came here to relax and the beach is the point → stay on the island, and spend the day at the southern tip.
Booking order
Cumberland ferry first — it constrains everything else. Then horseback riding if you want it, then the kayak trip, then Saturday dinner.
A note on four days
If you have four, do Cumberland and the Talbots, and keep the fourth for the island. Five and you should be thinking about a boat charter and a day in Jacksonville or St Augustine, which is about ninety minutes south and a completely different kind of Florida history.