What are solunar fishing times?

Solunar times are daily windows when fish are predicted to feed more actively, based on the moon's position. Major periods fall when the moon is directly overhead or underfoot (roughly 90 minutes to two hours each); minor periods fall when the moon is rising or setting (about an hour). That gives up to four windows a day, staggered around the moon's transit rather than the sun's.

Do solunar times actually work for fishing in Perth?

Partly. Fish do feed on cycles, and tides — a direct product of sun-moon alignment — clearly drive feeding windows. Whether solunar majors and minors add useful information on top of tide is less certain; studies are mixed. In Perth they're best treated as a tiebreaker, not a trump card, because the local tide range is tiny and wind matters far more on the day.

Are major or minor solunar periods better?

Major periods are the theoretical peak and are usually rated stronger than minors. But in Perth the single biggest factor is whether a solunar window overlaps a moving tide during low light. A minor period landing on a tide change at dawn will routinely out-fish a major at midday in a flat calm with no water moving.

How do I use solunar times with the tide?

Pick your species and spot first, then find the days where wind, swell and tide are genuinely fishable, and only then check solunar. If a major or minor overlaps a tide change during dawn or dusk, that's your session. If it lands at midday in a howling easterly, ignore it. Solunar is the last filter, not the first.

Which fish are most affected by solunar times in Perth?

Anecdotally, roaming predators like tailor and mulloway get linked to lunar peaks most often in Perth angling chat — though that may just be because people fish for them around dawn and dusk anyway. Structure-bound fish like black bream and King George whiting seem to care more about the tide moving than where the moon is.

Solunar Fishing Times in Perth: What Actually Works

Every Perth fishing forum has the same bloke. He’s got a solunar app open, he knows the exact minute the minor period starts on Saturday, and he’s planning a dawn session at Trigg. He’s also apparently unaware that there’s a 30-knot sou-wester warning sitting two pixels away from his tide chart. Bless him, he’ll be back Monday complaining the fish weren’t there.

Solunar theory is useful. It’s also one input among several, and in Perth it usually sits well behind tide, wind and whether the bait is actually around. Let’s pull the idea apart properly so you can use it without turning into that bloke.

What Solunar Theory Actually Says

Solunar theory, boiled down, says fish feeding activity is influenced by the position of the moon relative to where you’re standing. It comes out of John Alden Knight’s 1920s work and has been repackaged a hundred ways since, but the core claim is simple.

There are two kinds of windows each day. Major periods are when the moon is directly overhead or directly underfoot — roughly ninety minutes to two hours each, and they’re the theoretical peak. Minor periods are when the moon is rising or setting on your horizon — shorter, maybe an hour or so, and supposedly second-tier. That gives you up to four windows a day, staggered around the moon’s transit rather than the sun’s.

The “why” underneath it: the same gravitational tug that drives tides also influences fish behaviour directly, and the alignment between sun and moon through the lunar cycle (new and full moon especially) amplifies everything. Moving water means moving bait, moving bait means feeding predators.

Does It Hold Up?

Short answer: kind of, sometimes, and less than the true believers claim. Fish do feed on cycles. Tides, which are a direct product of sun-moon alignment, absolutely drive feeding windows — ask anyone chasing black bream in the Swan on a dead-flat neap versus a moving spring tide.

The trickier claim is that solunar majors and minors add useful information on top of tide. Some anglers swear by it. Peer-reviewed studies are mixed, mostly underwhelming, and often badly designed. What most experienced fishers I know will tell you honestly is that solunar nudges the odds, maybe, on days when everything else is roughly equal. It’s not going to turn a howling onshore blowout into a hot bite.

You’ll also find forum threads where every catch is attributed to a solunar peak and every blank is blamed on a “weak minor.” That’s astrology dressed up in lunar jargon. Be suspicious of anyone who can explain any outcome with the same theory.

When Solunar Is Actually Useful

Here’s where the theory earns its keep. Solunar is most useful as a tiebreaker, not a trump card.

Two scenarios where I actually look at it:

Picking between similar windows. You’ve got Saturday free. The tide moves reasonably between 5am and 9am, and again between 3pm and 7pm. Wind’s manageable both times. Which do you fish? If a major period lines up with one window and neither with the other, that’s a real piece of information. Fish the one with the overlap.

Planning a session a few days out. If you can only get out once this week, and you want to stack the deck, cross-reference solunar windows with tide movement and forecast wind before committing. You won’t always get a clean stack, but when you do, it’s worth holding out for.

When solunar is not useful: as a standalone reason to fish. A “strong major” at 2pm on a glassy 35°C day with no tide movement and sea breeze cranking won’t save you. Neither will it save you from fishing dirty water after a storm, or an onshore blow at Trigg Beach that’s turned the swell into soup.

The Perth Caveats

A few things about fishing here that matter more than moon phase on any given day.

Perth’s tide range is tiny — often 30 to 60 centimetres on a mixed cycle. The gravitational driver that solunar leans on is genuinely weaker here than in places with metre-plus tides. That doesn’t mean the theory fails, but the signal is smaller and easier to drown out with other factors.

Wind is enormous. The 2pm sou-wester reshuffles the deck every summer afternoon. A “perfect” major period at 3pm in December is almost always going to be ruined by 20-plus knots of onshore. The weather radar matters more than the moon icon.

Bait presence trumps everything. If the whitebait is thick off North Mole, the tailor will be on whether it’s a solunar peak or not. If the bait has moved on, no amount of lunar alignment is bringing them back to empty water.

Water temperature, recent rain, barometric pressure, even the boat traffic around Hillarys Boat Harbour on a sunny Saturday — all of these shift the dial more than a minor period does.

How to Use BiteCompass Solunar Data

The solunar view on BiteCompass is built to sit alongside the rest of the forecast, not on its own. That’s the whole point. You get the major and minor periods for the day, but they’re shown next to tide movement, wind direction and speed, swell, and sun times.

The useful way to read it:

Pick your species and spot first. Mulloway at Ashfield Flats on a making tide wants different conditions to King George whiting off a sheltered sand patch.
Find the days this week where wind, swell and tide are genuinely fishable.
Then look at solunar. Does a major or minor overlap with a tide change during low-light? That’s your session. Does it land at midday during a howling easterly? Ignore it.

The order matters. Solunar is the last filter, not the first.

Species That Seem More Solunar-Sensitive

Anecdotally — and I’m being honest about the “anecdotally” — some species seem more responsive to solunar timing than others. Apex predators feeding on the move like tailor and mulloway get associated with lunar peaks a lot in Perth angling chat. Structure-bound fish like black bream and King George whiting seem less fussed — they’ll feed when the tide moves, regardless of where the moon is.

Take that with a grain of salt. It could just be that people fish for tailor and mulloway more around dusk and dawn anyway, which often overlaps with moon transits. Correlation, meet causation, meet a few too many beers around a beach fire.

Solunar theory is a useful tool once you stop treating it like a prophecy. Use it to choose between two decent windows, or to plan a session a few days out. Don’t use it as an excuse to ignore a wind warning or a tide that isn’t moving. Before you load the car, check tides, wind, swell and solunar together on BiteCompass — that’s when all the inputs actually start pulling in the same direction.