Does the Moon Phase Matter for Surf Fishing?

Moon phase might be the most argued-about variable in fishing. Some surfcasters plan entire seasons around it. Others think it’s folklore. The truth is somewhere in the middle, and it’s more useful than either side.

The moon affects surf fishing in two real, measurable ways: through the tides and through light at night. Most of what people attribute to “the moon” comes down to one of those two.

Effect one: the moon drives the size of the tide

The moon’s biggest influence is on how much the tide moves.

• New and full moons line up the sun and moon’s pull, producing spring tides: higher highs, lower lows, and stronger currents. (It has nothing to do with the season; “spring” here means the water springs up.)
• Quarter moons put the sun and moon at right angles, producing neap tides: smaller ranges and weaker currents.

For surf fishing that’s a big deal. Stronger current means more bait getting pushed around, stronger rips, and more water moving through inlets. Many spots, especially inlets and points that depend on current, fish noticeably better on bigger tides. But some spots get too fast to fish on a spring tide and come alive on the gentler neap tides instead.

So when someone says “the full moon is the best time to fish,” what they may really be noticing is “big tides are good at my spot.” You can test that directly by recording the day’s tide range, and it’s often a clearer signal than the moon phase itself.

Effect two: moonlight at night

The second effect is light. A full moon on a clear night lights up the beach. A new moon leaves it dark.

Surfcasters disagree about this, and both sides have a point:

• Dark nights are a favorite for a lot of striper fishermen, especially those throwing eels and dark plugs. Field & Stream argues stripers feed more aggressively around the new moon (Field & Stream), and On The Water’s summer surf advice is wary of a bright moon riding high overhead (On The Water).
• Bright nights have their fans too. Some argue predators can see and chase bait better, and some spots consistently fish well under a big moon.
• Clouds change everything. A full moon behind heavy cloud cover gives off a fraction of its light, so “full moon” on the calendar doesn’t mean a bright beach (The Fisherman).

There’s probably no universal answer. It likely depends on the spot, the water clarity, the bait, the clouds and what you’re throwing. That’s exactly why it’s worth logging rather than taking anyone’s word for it.

Whether the moon is actually up while you fish matters for this. A full moon that rises at sunset lights the whole night. A last-quarter moon that rises after midnight leaves the early night dark.

What about solunar tables?

Solunar tables predict “major” and “minor” feeding periods from the moon’s position overhead or underfoot. Lots of anglers use them, and they do no harm. But the evidence behind those specific windows is weak. The analyses usually offered in their favor count record catches that fell in solunar periods, without counting all the fishless hours anglers spent in those same periods (Mack’s Lure). In the surf, the tide clock usually wins: if a solunar major falls on dead slack at noon, expect the slack to matter more.

The best evidence says: count the hours

The biggest study we know of on fishing and the moon looked at 341,959 angler-reported muskellunge catches over four decades. Counted the usual way, more fish were caught around the full and new moons. But survey data measuring catch per unit of effort, which is fish per hour fished, showed no moon effect at all. Anglers simply fished more around the full and new moons, so they caught more (Vinson & Angradi, PLOS ONE).

That’s a freshwater fish, and to be clear, nobody has published a study like it for striped bass, fluke, tog, bluefish or albies. But it’s a warning that applies to every surfcaster: if you fish the moon you believe in, your log will “prove” it, unless you count hours as well as fish. More on that in fish per hour.

The moon gets blamed for things it didn’t do

The tricky part about moon phase is that it’s tangled up with other things. Full and new moons bring bigger tides. The full moon in a given month falls on certain dates, which come with their own water temperature and bait. If your best night of the fall run happened to be on a full moon, it’s easy to credit the moon when it was really the bait showing up.

To separate them, you need two things: lots of trips, including the blanks, and a way to compare conditions while holding the others steady. That means comparing full-moon nights with new-moon nights at the same spot, around the same tide and time of year, not just “every full moon trip ever.”

How to test it yourself

1. For every trip, record the moon phase and whether it was up during your hours.
2. Record the day’s tide range, so you can tell the tide effect from the light effect.
3. Note the light: dawn, day, dusk or night.
4. Compare fish per hour fished, not total fish, between bright and dark nights, and between big and small tides, ideally spot by spot.

After a season, you’ll know whether the moon matters at your spots, and whether it’s the light or the tide doing the work. Chances are the answer will be more specific, and more useful, than anything a solunar table can tell you.