Key West, FL tide times

Predictions: NOAA CO-OPS station 8724580 — heights relative to MLLW.

Harmonic prediction from the official tide authority. Very high accuracy under normal conditions; storm surge may shift actual water level. Not for navigation.

Marine-conditions data not available for this station. Wind, swell and water temperature ride along with Open-Meteo Marine; gauge-only stations (e.g. UK EA Flood) publish water level only.

Predictions: NOAA CO-OPS station 8724580 — heights relative to MLLW. · Not for navigation.

The angler tradition for major/minor fishing windows: major ≈3-hour windows around moon transit and opposition; minor ≈2-hour windows around moonrise and moonset. Times are America/New York local. Folk tradition, not a scientific forecast.

Next spring tide on Sat 16 May (range 0.9m / 2.9ft). Next neap on Sat 23 May.

Spring tides cluster around new and full moons (biggest swings). Neap tides land on quarter moons (smallest swings). See the spring tide and neap tide glossary entries for the why.

Key West sits at the western end of the Florida Keys, the long arc of low coral islands that runs from Biscayne Bay south-west toward the Dry Tortugas. The tide gauge on the harbour reads one of the more unusual signatures in the continental United States. The pattern is mixed semidiurnal leaning diurnal — most days produce two highs and two lows of very unequal size, and on some days one of the cycles flattens out almost to nothing. Mean range is small, around 0.4 metres, climbing past 0.6 on the bigger spring tides. The Atlantic on the south side of the island and the Gulf of Mexico on the north each push their own tide curve through the inter-island channels, and the phase difference produces tide rips at Cow Key, Boca Chica, and the bridge cuts that run sharper than the height swing implies. Flats fishers reading the table for tarpon and bonefish work the change of tide more than the absolute level. The lowest spring lows of the month expose the inshore patch reef and grass flats around the harbour for an hour or two. Predictions come from NOAA CO-OPS station 8724580. Hurricane season runs June through November.