Perigee

King tides in Massachusetts, 2027

The biggest predicted tide in Massachusetts in 2027 reaches 12.0 ft above MLLW at Amelia Earhart Dam, Mystic River on Tuesday, July 6, at 1:10 AMlocal time. Below are all of the year's king tide windows — the top 1% of predicted highs — for NOAA reference stations along the Massachusettscoast. 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.

Amelia Earhart Dam, Mystic River

King tides (11.8 ft and above) at NOAA station 8443662. Full year: 2027 tide table.

  • Jan 23 — peaks 11.9 ft at 11:31 AM
  • Jun 7–8 — peaks 11.9 ft at 1:23 AM
  • Jul 5–7 — peaks 12.0 ft at 1:10 AM
  • Aug 3–4 — peaks 12.0 ft at 12:55 AM

Annisquam, Lobster Cove

King tides (11.0 ft and above) at NOAA station 8441571. Full year: 2027 tide table.

  • Jan 23–24 — peaks 11.2 ft at 12:25 PM
  • Jul 5–7 — peaks 11.2 ft at 1:08 AM
  • Aug 2 — peaks 11.2 ft at 11:59 PM
  • Aug 4–5 — peaks 11.2 ft at 12:53 AM

Beverly, Beverly Harbor

King tides (11.2 ft and above) at NOAA station 8442417. Full year: 2027 tide table.

  • Jan 23 — peaks 11.2 ft at 11:29 AM
  • Jun 7 — peaks 11.2 ft at 1:22 AM
  • Jul 5–7 — peaks 11.4 ft at 1:08 AM
  • Aug 3–5 — peaks 11.4 ft at 12:54 AM

BOSTON

King tides (11.6 ft and above) at NOAA station 8443970. Full year: 2027 tide table.

  • Jan 23 — peaks 11.7 ft at 11:24 AM
  • Jun 6–7 — peaks 11.7 ft at 1:19 AM
  • Jul 5–7 — peaks 11.8 ft at 1:05 AM
  • Aug 2 — peaks 11.8 ft at 11:54 PM
  • Aug 4 — peaks 11.8 ft at 12:49 AM

Boston Light

King tides (11.2 ft and above) at NOAA station 8444162. Full year: 2027 tide table.

  • Jan 22–24 — peaks 11.4 ft at 11:25 AM
  • Jul 5–7 — peaks 11.4 ft at 1:05 AM
  • Aug 2 — peaks 11.3 ft at 11:55 PM
  • Aug 4 — peaks 11.3 ft at 12:50 AM

Brant Rock, Green Harbor River

King tides (11.3 ft and above) at NOAA station 8446009. Full year: 2027 tide table.

  • Jan 23–24 — peaks 11.3 ft at 11:33 AM
  • Jul 5–7 — peaks 11.5 ft at 1:12 AM
  • Aug 3–5 — peaks 11.4 ft at 12:57 AM

Cape Cod Canal, Bourne Bridge

King tides (5.7 ft and above) at NOAA station 8447259. Full year: 2027 tide table.

  • Jan 21–23 — peaks 5.8 ft at 9:18 AM
  • Jun 5 — peaks 5.7 ft at 11:18 PM
  • Jun 7 — peaks 5.7 ft at 12:12 AM
  • Jul 3–4 — peaks 5.8 ft at 11:00 PM
  • Jul 6 — peaks 5.7 ft at 12:00 AM

Cape Cod Canal, Bournedale

King tides (7.8 ft and above) at NOAA station 8447191. Full year: 2027 tide table.

  • Jan 22–24 — peaks 7.9 ft at 11:02 AM
  • Jun 7 — peaks 7.8 ft at 12:56 AM
  • Jul 4 — peaks 7.8 ft at 11:48 PM
  • Jul 6 — peaks 7.9 ft at 12:42 AM
  • Aug 2 — peaks 7.8 ft at 11:33 PM
  • Aug 4 — peaks 7.8 ft at 12:27 AM

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: Massachusetts king tides 2026.