Spring arrives slowly on Long Island Sound, but the fishing? That wakes up fast. If you've been wondering about the best fish to catch Long Island spring, you're not alone — every April and May, we start getting calls from people who've spent all winter waiting for this. The water temperature climbs out of the 40s, the baitfish return to the shallows, and suddenly Port Jefferson Harbor is alive again. This guide is for you: the angler who wants to show up prepared and ready to enjoy every minute of it.
What's in This Guide
- Why Spring Is the Most Exciting Season to Fish Long Island Sound
- The Best Fish to Catch Long Island Spring — Species Breakdown
- Spring Fishing Calendar — What to Target Month by Month
- What to Expect on a Spring Charter Out of Port Jefferson
Why Spring Is the Most Exciting Season to Fish Long Island Sound
There's a moment every April when you walk down to the dock and you can just feel it. The water is still cold, maybe 46°F, but something has shifted. The bunker schools — those big, oily menhaden that are the heartbeat of the Sound's food chain — are pushing back into the shallows. The gulls are working the surface again. And the regulars are back, lined up at the dock with their coffee, grinning like it's the first day of baseball season. That's spring on Long Island Sound, and honestly, there's nothing quite like it.
Here's what's happening beneath the surface. Through March, the Sound sits cold — sometimes below 42°F — and most of the action holds in deeper water. As April arrives and temperatures begin their steady climb toward 58°F by late May, that warming triggers a cascade. Baitfish move first. The bunker arrive in dense, nervous schools, and they pull everything behind them — stripers, bluefish, weakfish, all following the food. It happens every year and it still gets me excited every single time.
Port Jefferson Harbor sits beautifully along the Sound's east-west axis, and that geography matters. Fish migrating along the Connecticut shoreline and up from the western Sound naturally stage and feed in this area. We're not racing to some far-off spot — the fish come to us. The rocky structure off Old Field Point, the rips at the harbor mouth, the sandy bottom just offshore — this stretch of water is a natural dining room for spring fish.
Spring weather on Long Island can be moody. You might get a gorgeous, flat-calm morning in late April, and you might get a breezy, gray afternoon the following day. That's part of the adventure, and our crew has been reading these waters out of Port Jefferson for decades. You can learn more about who we are and what drives us on our About page — but the short version is that we love this water, and we love sharing it.
The Best Fish to Catch Long Island Spring — Species Breakdown
People often ask me, "Captain Des, what are we going to catch?" The answer changes week by week through spring — which is part of what makes it so much fun. Here's a species-by-species look at what's actually swimming around out there and when you're most likely to find it.
Striped Bass
The striper is the king of the Long Island spring. These fish begin their migratory run northward in April, moving through the Sound from west to east on their way to summer feeding grounds. By mid-April, we're typically seeing catchable fish off Port Jefferson, and the bite builds beautifully through May.
The drop-offs off Buoy 11 are some of my favorite early-season striper territory. The fish use that structure, feeding on squid and bunker and holding in the current seams. Early spring fish tend to run schoolie-sized — think 18 to 28 inches — and they are absolute fun on light tackle. As May matures and the water warms, the bigger fish arrive. A 40-inch cow striper in late May is not a fantasy out here. It happens on our charters, and it is a moment you do not forget.
We follow the current NY DEC striped bass regulations carefully and take our catch-and-release ethic seriously, especially with the larger breeding fish. Protecting this population means there will be stripers in the Sound for your kids and grandkids to chase someday, and that matters deeply to us.
Captain's Tip: Early morning is striper time in spring. The hour after dawn, when the light is just breaking over the Connecticut shoreline and the bait is still bunched tight near the surface — that's when the big fish feed most aggressively. If you can get out early, do it.
Fluke (Summer Flounder)
Fluke are, without question, the most popular bottomfish on Long Island, and for good reason. By mid-May most years, they start pushing into the nearshore waters around Port Jefferson, and the fishing can be genuinely excellent.
Fluke behavior is fascinating once you understand it. These fish lie flat on sandy bottom, practically invisible, and ambush whatever swims past them. Drifting slowly over sandy patches off the north shore — letting the bait sweep naturally along the bottom — is the classic technique, and when a fluke commits to a bite, you know it immediately. They pull hard and they don't give up easily.
Check the NY DEC Saltwater Fishing Regulations before your trip for the most current rules. We target keeper-sized fish on our charters, but even the smaller ones are exciting to pull up, especially for younger anglers getting their first taste of bottomfishing.
Fluke are also spectacular table fare. Light, sweet, versatile — they pan-fry beautifully and hold up wonderfully to a simple lemon-butter preparation. If you're hoping to bring dinner home from a spring charter, fluke is your best friend.
Black Sea Bass
Black sea bass are aggressive, they bite with confidence, and they fight well on light tackle. They also happen to taste wonderful — one of the best-eating fish in the Sound. First-timers often don't know what to expect from them, and I love watching the reaction the moment they hook one.
Black sea bass season opens in May, and the rocky structure around Port Jefferson is prime habitat for them. They hold tight to rocks and ledges, which makes them very targetable once you know where to look. For beginners and younger anglers especially, black sea bass are a joy — you're almost never waiting long for a bite.
Plenty of people have come aboard focused entirely on stripers and left talking about the sea bass they pulled up. These fish have a way of stealing the show, and I'm always happy when they do.
Pogies ( Scup ) – Crowd Pleaser
Huge schools of porgies migrate into the Sound in early May and set up along the beach to spawn. It's some of the most epic fishing of the year and usually lasts straight on till Father's Day. It's a wonderful fish to target, especially for beginners and children, as the action can be incredible.
Weakfish (Sea Trout) — The Wild Card
Weakfish deserve an honest mention, because when they show up, they are truly something special. These fish have had inconsistent seasons in recent years throughout the Sound, and I won't promise you a weakfish trip. But in May, when the conditions are right, weakfish do appear in these waters — and they are worth knowing about.
The coloring on a weakfish is remarkable. Gold and olive along the back, spotted flanks, a warm iridescent shimmer — they are genuinely one of the most beautiful fish you can pull out of the Sound. If you happen to catch one this spring, take a moment to appreciate it before the release. Not everyone gets to see one up close.
Spring Fishing Calendar — What to Target Month by Month
One of the most common questions I get this time of year is some version of "when should we come?" It's a great question, and the honest answer is: it depends on what you most want to catch. Here's how the season typically unfolds out of Port Jefferson.
April
The water is still cold — somewhere between 42°F and 50°F through most of the month — and the season is just waking up. Stripers are arriving and the early-season bite can be very good, particularly around the harbor mouth and the rocky structure to the west. Some cod linger in deeper water through early April if you want to target them specifically. Weather is the wildcard this month; mornings on the water can still drop below 40°F, so dress in serious layers and bring a windproof layer on top. The crew will take good care of you, but being warm makes the whole experience better.
May
This is the month. May is when everything comes together on Long Island Sound, and our charters fill up faster in May than any other spring month. The stripers are in full swing, fluke season opens and builds quickly, black sea bass are actively biting, and the baitfish are thick everywhere. Water temps push into the mid-50s, the days are longer, and the harbor has that wonderful, buzzing energy that only happens in May. If you can only pick one spring month and you want the broadest, most exciting variety of fish — pick May.
Early June
Early June is the beautiful bridge between spring and summer. Fluke fishing often peaks in these weeks, stripers are still present before they push further east, and porgy — or scup, as some folks call them — begin showing up in numbers. Porgy are terrific fun on light tackle and make excellent eating. Early June also tends to offer the most settled weather of the three months, which means more comfortable days on the water and the ability to run a little further when conditions allow.
Because of Port Jefferson's central position on the Sound, our boat has real flexibility on any given day. We can work the local structure close to the harbor, push east toward more open water, or run up toward the Connecticut shoreline when the weather cooperates and the fish are showing there. We read what the water is telling us and we go find the fish — that's always been our approach.
Celtic Quest offers both half-day and full-day options. You can find everything you need on our trips page — including what each trip covers and how to book.
What to Expect on a Spring Charter Out of Port Jefferson
If this is your first charter — or your first in a long time — I want you to feel completely comfortable before you even set foot on the boat. So let me walk you through what a typical spring morning with Celtic Quest actually looks like.
You'll meet us at the dock in Port Jefferson Harbor, usually early in the morning when the light is soft and the harbor is quiet in that lovely way it only is before the day really gets going. The crew will be there ahead of you, getting the boat ready and rigged. We'll talk through what we're targeting that day, what the conditions look like, and what you can expect once we're moving.
No fishing experience needed at all. Our crew genuinely loves teaching beginners — showing someone how to feel for a striper strike for the first time, or watching a kid pull up their first fluke, never gets old for us. We handle the bait, the rigging, the tackle — everything. You just show up and enjoy being on the water.
Spring days on Long Island Sound have a quality of light that's hard to describe until you've seen it. The way the morning sun catches the chop on the Sound, the Connecticut hills visible on calm days across the water, the occasional osprey working the surface — it's genuinely beautiful out there, and the fishing is almost a bonus on top of all of it. Almost.
A few practical things to know before your spring trip:
- Dress warmer than you think you need to. Even on a mild spring day, the wind on the water will surprise you. Layers are your friend, and a windproof outer layer is essential in April and early May.
- Bring sunscreen. The spring sun reflects strongly off the water, and a long morning on the Sound will catch you off guard if you're not protected.
- If you're prone to seasickness, take something the night before and again the morning of. Waiting until you feel unwell is too late. We're happy to talk through options when you call.
- Bring snacks and drinks. We'll have water on board, but a good snack goes a long way on a morning charter, especially for younger anglers.
- Talk to us beforehand. Call us, ask your questions, tell us who's coming and what you're hoping for. We'd rather spend ten minutes on the phone making sure the trip is exactly right for you than have anyone show up with surprises.
A good charter isn't just about the fish you bring home. It's about the two hours you spend laughing with your family at the stern. It's about the quiet moment when the sun is up and the Sound is flat and there is absolutely nowhere else any of you would rather be. I've been doing this for 25 years, and that part still means everything to me.
Come out and fish with us this spring. The Sound is waiting, and so are we.
Questions about spring charters? Give us a call or send us a message through our website — we'd love to talk fishing with you.
Ready to get out on the water? book your Long Island fishing trip or call us at (631) 928-3926. We’ll see you at the dock.
