Tides will run higher and lower than normal this weekend and well into next week and it is tied mostly to two astronomical events. The moon is full on Monday, and it will be especially close, in perigee, on Sunday.
The gravitational pull of both the moon and sun create our tides. When the moon is particularly close, tidal pull is more extreme so tides run higher and lower than normal.
We had the same thing happen only a month ago, but slightly more extreme. Last month full moon and perigee were on the same day.