Agate Hunting on the Oregon Coast: Best Time, Rules, and Winter 2026–27 Windows

Winter is when the Oregon coast gives up its agates: storms strip the summer sand and uncover the gravel where they hide, and state rules let you keep a gallon a day. The scarce ingredient is light. In December 2026, Port Orford (NOAA station 9431647) gets 9 daylight minus tides and Newport (9435380) just 5 — and across the whole October 2026–March 2027 king-tide season, each station's five lowest daylight lows all land between 5:04 and 6:25 PM. Deepest daylight low of the season: −2.21 ft at Port Orford, December 24.

Why is winter the best time to find agates?

The agates themselves are old news — banded chalcedony, formed millions of years ago in volcanic rock. What changes is the beach on top of them. Travel Oregon's agate guide relays the collector's case with a hedge: some argue the best time to find them is when winter wind scours the beaches, the loss of sand "revealing layers of rocks anytime from December to March." Collector lore adds the corollary: go soon after a big blow, before the next crowd and the next sand movement, and walk the freshly exposed gravel while it's still wet enough to make the translucent stones glow.

Where to look is less mysterious than it sounds. Travel Oregon's list includes South Beach State Park at Newport, home of the "Newport Blues," a dark-gray local agate — and, conveniently for us, next door to the NOAA gauge (9435380) this site uses for Newport predictions. On the south coast, their picks run to Whiskey Run Beach and Otter Point. Our Port Orford station page tracks Battle Rock Beach, Rocky Point, and a local Agate Beach of its own.

What does Oregon let you keep?

The ocean shore is a state recreation area, and collecting is regulated by rule OAR 736-021-0090. The numbers worth memorizing:

• Agates, shells, stones, fossils (non-living, loose on the ground): up to a one-gallon container per person per day, and three gallons per person per calendar year.
• Each person must use an individual container — you can't pool a family's finds into one bucket.
• Cobble has its own line: five gallons per day, ten per year. Sand: five per day, twenty per year.
• More than that requires a special-use permit from Oregon Parks and Recreation.

A gallon of agates is a genuinely heavy day. Most hunters never brush the limit; the rule exists so the gravel is still there next winter.

Where do the winter 2026–27 daylight minus windows land?

Here is the collision at the heart of winter agate hunting: the season that exposes the gravel is the season that hides the tide. Minus tides keep arriving all winter, but the daylight ones get scarce, and on the Oregon coast they migrate to dusk. Across the king-tide season (October 2026 through March 2027), the five lowest daylight lows at each station all bottom out between 5:04 and 6:25 PM — and nothing from February or March makes either top five. The depth is front-loaded into late November through late January.

Port Orford, NOAA station 9431647:

Newport (South Beach), NOAA station 9435380:

Five lowest daylight lows of the Oct 2026–Mar 2027 king-tide season at each station, computed 2026-07-03 from NOAA station 9431647 and 9435380 predictions.

Read the daylight column before the depth column. At Newport on November 24, the window spans four and a half hours but holds only 46 daylight minutes — all at the front, before an early-winter sunset — so the 6:04 PM low itself arrives in the dark. In summer we tell you to show up an hour before the low; in winter, show up when the window opens and work the falling tide while you can still see it. The best light-to-depth trade on this shortlist is Port Orford on January 21, 2027: −1.89 ft, 152 daylight minutes, and the only Great-band window among the ten season-lowest lows in the tables above. If you're picking one trip, that's the Trip Picker's kind of answer, and the 2026–27 king tide calendar has the rest of the season's dates.

Do you actually need a minus tide?

For agates, honestly, no — and the monthly counts show why the question matters. Daylight minus tides by month:

Daylight minus tides per month, computed 2026-07-03 from NOAA station 9431647 and 9435380 predictions.

Summer is drowning in good tides: Port Orford's July best is −2.46 ft at 6:37 AM with 217 daylight minutes (score 90, Exceptional), and Newport's is −2.52 ft with 285. But July gravel is buried gravel. Winter flips it — the sand leaves, and the deep daylight lows thin out to a handful of dusk windows. Newport's deepest winter daylight low gives up 0.61 ft to its summer best; Port Orford, interestingly, gives up only 0.25 ft. The southern station keeps more of its depth in the dark months, one reason it punches above its size for winter beachcombing.

So the strategy is a two-key lock. Storm first: that's weather, watch the forecast. Tide second: any daylight low helps, a minus low helps most, and the tables above are the winter shortlist. The Tide Window Finder recomputes the list any day you like, and the year heatmap shows the whole seasonal shape at a glance — including that September trough, when Port Orford manages just 3 daylight minus tides all month.

What about the ocean at your back?

Post-storm beaches earn their reputation for surprises, and the state's own guidance is blunt. Travel Oregon's agate guide: "Never turn your back to the ocean, watch for sneaker waves" — and it warns how easy it is to get lost in the search and miss one coming. On a dusk window that goes double: the daylight minutes in the tables above end before the window does, so plan your walk back while the beach is still lit. The flood tide doesn't wait for you to finish sorting pebbles.

One gallon, one bucket per person, eyes on the water. The gravel does the rest. For the summer counterpart to this calendar — those 90-point July mornings — see the Newport station page.