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Tides

King tides in Maryland, 2027

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The biggest predicted tide in Maryland in 2027 reaches 2.2 ft above MLLW at Baltimore, Fort McHenry on Sunday, July 4, at 7:23 AM local time. Below are the currently available king tide windows — the top 1% of predicted highs — for NOAA reference stations along the Maryland coast. King tides are perigean spring tides: they arrive when a full or new moon lines up with the moon's closest approach to Earth, and they preview the flooding that sea level rise will make routine. Read how king tides work.

Annapolis (US Naval Academy)

King tides (1.8 ft and above) at NOAA station 8575512. Full year: 2027 tide table.

  • Jun 5 — peaks 1.8 ft at 6:22 AM
  • Jul 3–5 — peaks 1.9 ft at 6:09 AM
  • Jul 31–Aug 2 — peaks 1.9 ft at 5:00 AM
  • Aug 29 — peaks 1.8 ft at 3:46 AM

Baltimore, Fort McHenry

King tides (2.1 ft and above) at NOAA station 8574680. Full year: 2027 tide table.

  • Jun 5 — peaks 2.1 ft at 7:37 AM
  • Jul 3–5 — peaks 2.2 ft at 7:23 AM
  • Jul 31–Aug 2 — peaks 2.2 ft at 6:13 AM
  • Oct 1 — peaks 2.1 ft at 8:30 PM

Barren Island

King tides (1.8 ft and above) at NOAA station 8571579. Full year: 2027 tide table.

  • Aug 3–4 — peaks 1.8 ft at 3:09 AM
  • Aug 31–Sep 2 — peaks 1.9 ft at 2:48 AM
  • Sep 29–Oct 1 — peaks 1.9 ft at 2:49 PM

NOAA CO-OPS harmonic predictions, datum MLLW, station local time. Actual water level can run higher with storms, onshore wind, and low pressure — king tide + storm is the flooding combination to watch. Predictions are for planning, not navigation.

Also available: Maryland king tides 2026.