June 10, 2026

The oyster calendar: tides and seasonality

Why the "R months", what tides change, and when Ostra Regal is at its best.

Oyster beds at low tide — Ostra Regal

The "R months": myth or reality?

The popular rule says to eat oysters only in months containing an "r" (September to April). Originally it was about preservation before refrigeration and summer spawning. Today Ostra Regal can be enjoyed year-round: in summer some become milky (spawning), a creamier texture that has its fans.

The role of tides

On our Irish beds (Dundrum Bay, Bannow Bay), the oyster lives to the rhythm of strong tides. Alternating immersion and exposure strengthens the oyster, refines its shell and concentrates aromas — giving that firm flesh and clean iodine.

When is Ostra Regal at its best?

The cru is at its fullest from autumn to early spring, when the water is cold and the oyster firmest. Thanks to refining in claires and hand-selected grades, quality stays consistent all year.

Further reading

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