Live Tides on Your Charter Website

Tide Fundamentals

How Tides Work, and Why They Matter for Fishing

Tides are driven by the gravitational pull of the moon and, to a lesser extent, the sun. As the Earth rotates, coastal waters bulge toward the moon and away from it on the opposite side, creating two high tides and two low tides in most places every day. The actual timing and height of each tide depends on location, coastline shape, and water depth. A harbor in Maine can see a 12-foot swing while a similar-latitude port in Florida sees less than 3 feet.

Fish care about tides because moving water moves bait. Slack tide, the brief window at high or low when water stops flowing, usually shuts the bite down. The first two hours of a new tide (incoming or outgoing) are often the most productive. Structure-oriented species like striped bass, snook, and redfish position themselves where current funnels prey, and that position shifts with the stage of the tide. Reading a tide chart is less about knowing the numbers and more about knowing which spots fish best on which stage.

Spring Tides vs Neap Tides

Roughly twice a month, the sun and moon align (new moon and full moon), and their gravitational forces stack. The result is a spring tide: higher highs, lower lows, stronger current, and typically the most active feeding of the month. The week after each full or new moon is often when inshore fishing peaks. Neap tides happen around the first and third quarter moons, when the sun and moon pull at right angles. Swings are smaller, current is weaker, and bite windows are shorter.

The Hookset tide widget flags spring tide days automatically by tracking moon phase. If your anglers fish with you on a spring tide day, they’re fishing the best possible conditions of the month.

What is MLLW?

MLLW stands for Mean Lower Low Water. It’s the zero reference point for U.S. tide heights: the average of the lower of the two daily lows, measured over a 19-year cycle. Every tide height you see on a nautical chart or on this widget is referenced to that baseline.

This matters because nautical charts use the same datum. When a chart shows 10 feet of water at a spot, that’s 10 feet at MLLW. At high tide you’ll have more than 10 feet. At a negative-tide low, you may have less. Captains planning routes across bars, inlets, or shallow flats use the current tide height plus chart depth to judge whether they’ll clear.

Reading a Tide Chart for Fishing

A tide chart typically shows a sinusoidal curve through the day, peaking at each high tide and bottoming at each low. For fishing purposes, the useful information is:

• Tide times: when high and low tide occur. Plan trips to cover the first and last two hours of moving water on either side of a tide change.
• Tide range: the difference between high and low on a given day. Big swings (spring tides) mean strong current. Small swings (neap tides) mean weaker current.
• Tide stage: whether the water is rising (flood), falling (ebb), or barely moving (slack). Many species feed aggressively on one stage and ignore the other.
• Current height: useful for judging clearance over shallow structure or whether a specific spot is fishable at this stage.

The Key Bite Windows

Across most inshore saltwater species, three windows consistently outperform:

1. First two hours of incoming tide. Water floods back into creeks, grass flats, and bay systems, pushing bait ahead of it. Predators stage at the mouths of creeks and at current seams.
2. Last two hours of outgoing tide. Water drains out of the same systems, concentrating bait in deeper channels and at drop-offs. Stripers, redfish, snook, and trout position to ambush.
3. Any stage overlapping sunrise or sunset. Low-light plus moving water is the highest-probability combination of the day. The solunar widget flags these windows automatically.

Tide Glossary

Flood tide

Water rising toward high tide. Current flows inland (toward shore, up rivers, into bays).

Ebb tide

Water falling toward low tide. Current flows seaward (out of bays, down rivers, away from shore).

Slack tide

The brief window at high or low tide when current reverses. Typically 20 to 60 minutes of near-zero flow. Bite usually slows.

Tide range

The vertical difference between consecutive high and low tides at a location. Ranges from under 2 feet in Florida to over 40 feet in the Bay of Fundy.

Semi-diurnal

A tide pattern with two highs and two lows per day, roughly equal in height. Most U.S. coastlines.

Diurnal

A tide pattern with one high and one low per day. Common in parts of the Gulf of Mexico.

Mixed semi-diurnal

Two highs and two lows per day, but with noticeably different heights. Common on the West Coast.